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• Mac - Flash file not loaded in independent flash player

  - by Mugdha

  Hi, I am working on an independent application to play flash files on Mac. I have already done the same for Linux, and it works flawlessly but on mac for some reason flash is not drawing to my window. It is not throwing any kind of error too. I am using Flash player 10, that would mean that I am using the Core Graphics drawing model. I am able to send mouse events to flash and wrote a sample plugin to check if there was a problem in the context that I was sending, but my sample plugin draws properly to the window. I am getting a call for NPN_InvalidateRect twice and as a response I send an update Event back to flash. I drew a dummy rectangle to check that my context is correct. I have flipped the context to make the origin as top left corner. On doing right click on the debug version of the flash player it shows the following message: "Movie not loaded..." Can anyone give me any idea why is the content not being drawn? I would really appreciate the help, as I have been struggling with it for more than a month now. Here is a small log of the interaction that I have with flash: NPN_UserAgent Called NPN_GetValue Called with variable NPNVWindowNPObject; return NULL NPN_GetValue Called with variable NPNVWindowNPObject; return NULL NPN_GetValue Called with variable NPNVSupportsWindowless; return true NPN_SetValue Called for Variable - NPPVpluginTransparentBool; return true NPN_GetValue Called with variable NPNVsupportsCoreGraphicsBool; return true NPN_SetValue Called for Variable - NPNVpluginDrawingModel NPP_SetWindow (CoreGraphics): 0, window=0xebaa90, context=0xe4c930, window.x:0 window.y:22 window.width:480 window.height:270 NPP_HandleEvent(activateEvent) accepted:0 isActive: 1 NPP_HandleEvent(updateEvt) accepted: 1 NPN_UserAgent Called NPN_GetURLNotify Called with URL - javascript:top.location+"flashplugin_unique" NPN_GetValue Called with variable NPNVWindowNPObject; return NULL NPP_NewStream URL=/Users/mjain/Desktop/clock.swf MIME=application/x-shockwave-flash error=0 NPP_WriteReady responseURL=/Users/mjain/Desktop/clock.swf bytes=268435455 NPN_InvalidateRect Called NPP_Write responseURL=/Users/mjain/Desktop/clock.swf bytes=9925 total-delivered=9925/9925 NPP_WriteReady responseURL=/Users/mjain/Desktop/clock.swf bytes=268435455 NPP_DestroyStream responseURL=/Users/mjain/Desktop/clock.swf error=0 NPP_HandleEvent(updateEvt) accepted: 1 NPN_InvalidateRect Called NPP_HandleEvent(updateEvt) accepted: 1 NPP_NewStream URL=javascript:top.location+"flashplugin_unique" MIME=text/plain error=0 NPP_WriteReady responseURL=javascript:top.location+"flashplugin_unique" bytes=16000 NPN_UserAgent Called NPP_Write responseURL=javascript:top.location+"flashplugin_unique" bytes=52 total-delivered=52/52 NPP_WriteReady responseURL=javascript:top.location+"flashplugin_unique" bytes=16000 NPP_DestroyStream responseURL=javascript:top.location+"flashplugin_unique" error=0 NPP_URLNotify responseURL=javascript:top.location+"flashplugin_unique" reason=0 Thanks Mugdha.

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• Create and Consume WCF service using Visual Studio 2010

  - by sreejukg

  In this article I am going to demonstrate how to create a WCF service, that can be hosted inside IIS and a windows application that consume the WCF service. To support service oriented architecture, Microsoft developed the programming model named Windows Communication Foundation (WCF). ASMX was the prior version from Microsoft, was completely based on XML and .Net framework continues to support ASMX web services in future versions also. While ASMX web services was the first step towards the service oriented architecture, Microsoft has made a big step forward by introducing WCF. An overview of planning for WCF can be found from this link http://msdn.microsoft.com/en-us/library/ff649584.aspx . The following are the important differences between WCF and ASMX from an asp.net developer point of view. 1. ASMX web services are easy to write, configure and consume 2. ASMX web services are only hosted in IIS 3. ASMX web services can only use http 4. WCF, can be hosted inside IIS, windows service, console application, WAS(Windows Process Activation Service) etc 5. WCF can be used with HTTP, TCP/IP, MSMQ and other protocols. The detailed difference between ASMX web service and WCF can be found here. http://msdn.microsoft.com/en-us/library/cc304771.aspx Though WCF is a bigger step for future, Visual Studio makes it simpler to create, publish and consume the WCF service. In this demonstration, I am going to create a service named SayHello that accepts 2 parameters such as name and language code. The service will return a hello to user name that corresponds to the language. So the proposed service usage is as follows. Caller: SayHello(“Sreeju”, “en”) -> return value -> Hello Sreeju Caller: SayHello(“???”, “ar”) -> return value -> ????? ??? Caller: SayHello(“Sreeju”, “es”) - > return value -> Hola Sreeju Note: calling an automated translation service is not the intention of this article. If you are interested, you can find bing translator API and can use in your application. http://www.microsofttranslator.com/dev/ So Let us start First I am going to create a Service Application that offer the SayHello Service. Open Visual Studio 2010, Go to File -> New Project, from your preferred language from the templates section select WCF, select WCF service application as the project type, give the project a name(I named it as HelloService), click ok so that visual studio will create the project for you. In this demonstration, I have used C# as the programming language. Visual studio will create the necessary files for you to start with. By default it will create a service with name Service1.svc and there will be an interface named IService.cs. The screenshot for the project in solution explorer is as follows Since I want to demonstrate how to create new service, I deleted Service1.Svc and IService1.cs files from the project by right click the file and select delete. Now in the project there is no service available, I am going to create one. From the solution explorer, right click the project, select Add -> New Item Add new item dialog will appear to you. Select WCF service from the list, give the name as HelloService.svc, and click on the Add button. Now Visual studio will create 2 files with name IHelloService.cs and HelloService.svc. These files are basically the service definition (IHelloService.cs) and the service implementation (HelloService.svc). Let us examine the IHelloService interface. The code state that IHelloService is the service definition and it provides an operation/method (similar to web method in ASMX web services) named DoWork(). Any WCF service will have a definition file as an Interface that defines the service. Let us see what is inside HelloService.svc The code illustrated is implementing the interface IHelloService. The code is self-explanatory; the HelloService class needs to implement all the methods defined in the Service Definition. Let me do the service as I require. Open IHelloService.cs in visual studio, and delete the DoWork() method and add a definition for SayHello(), do not forget to add OperationContract attribute to the method. The modified IHelloService.cs will look as follows Now implement the SayHello method in the HelloService.svc.cs file. Here I wrote the code for SayHello method as follows. I am done with the service. Now you can build and run the service by clicking f5 (or selecting start debugging from the debug menu). Visual studio will host the service in give you a client to test it. The screenshot is as follows. In the left pane, it shows the services available in the server and in right side you can invoke the service. To test the service sayHello, double click on it from the above window. It will ask you to enter the parameters and click on the invoke button. See a sample output below. Now I have done with the service. The next step is to write a service client. Creating a consumer application involves 2 steps. One generating the class and configuration file corresponds to the service. Create a project that utilizes the generated class and configuration file. First I am going to generate the class and configuration file. There is a great tool available with Visual Studio named svcutil.exe, this tool will create the necessary class and configuration files for you. Read the documentation for the svcutil.exe here http://msdn.microsoft.com/en-us/library/aa347733.aspx . Open Visual studio command prompt, you can find it under Start Menu -> All Programs -> Visual Studio 2010 -> Visual Studio Tools -> Visual Studio command prompt Make sure the service is in running state in visual studio. Note the url for the service(from the running window, you can right click and choose copy address). Now from the command prompt, enter the svcutil.exe command as follows. I have mentioned the url and the /d switch – for the directory to store the output files(In this case d:\temp). If you are using windows drive(in my case it is c: ) , make sure you open the command prompt with run as administrator option, otherwise you will get permission error(Only in windows 7 or windows vista). The tool has created 2 files, HelloService.cs and output.config. Now the next step is to create a new project and use the created files and consume the service. Let us do that now. I am going to add a console application to the current solution. Right click solution name in the solution explorer, right click, Add-> New Project Under Visual C#, select console application, give the project a name, I named it TestService Now navigate to d:\temp where I generated the files with the svcutil.exe. Rename output.config to app.config. Next step is to add both files (d:\temp\helloservice.cs and app.config) to the files. In the solution explorer, right click the project, Add -> Add existing item, browse to the d:\temp folder, select the 2 files as mentioned before, click on the add button. Now you need to add a reference to the System.ServiceModel to the project. From solution explorer, right click the references under testservice project, select Add reference. In the Add reference dialog, select the .Net tab, select System.ServiceModel, and click ok Now open program.cs by double clicking on it and add the code to consume the web service to the main method. The modified file looks as follows Right click the testservice project and set as startup project. Click f5 to run the project. See the sample output as follows Publishing WCF service under IIS is similar to publishing ASP.Net application. Publish the application to a folder using Visual studio publishing feature, create a virtual directory and create it as an application. Don’t forget to set the application pool to use ASP.Net version 4. One last thing you need to check is the app.config file you have added to the solution. See the element client under ServiceModel element. There is an endpoint element with address attribute that points to the published service URL. If you permanently host the service under IIS, you can simply change the address parameter to the corresponding one and your application will consume the service. You have seen how easily you can build/consume WCF service. If you need the solution in zipped format, please post your email below.

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• Padding error when using RSA Encryption in C# and Decryption in Java

  - by Matt Shaver

  Currently I am receiving the following error when using Java to decrypt a Base64 encoded RSA encrypted string that was made in C#: javax.crypto.BadPaddingException: Not PKCS#1 block type 2 or Zero padding The setup process between the exchange from .NET and Java is done by creating a private key in the .NET key store then from the PEM file extracted, created use keytool to create a JKS version with the private key. Java loads the already created JKS and decodes the Base64 string into a byte array and then uses the private key to decrypt. Here is the code that I have in C# that creates the encrypted string: public string Encrypt(string value) { byte[] baIn = null; byte[] baRet = null; string keyContainerName = "test"; CspParameters cp = new CspParameters(); cp.Flags = CspProviderFlags.UseMachineKeyStore; cp.KeyContainerName = keyContainerName; RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp); // Convert the input string to a byte array baIn = UnicodeEncoding.Unicode.GetBytes(value); // Encrypt baRet = rsa.Encrypt(baIn, false); // Convert the encrypted byte array to a base64 string return Convert.ToBase64String(baRet); } Here is the code that I have in Java that decrypts the inputted string: public void decrypt(String base64String) { String keyStorePath = "C:\Key.keystore"; String storepass = "1234"; String keypass = "abcd"; byte[] data = Base64.decode(base64String); byte[] cipherData = null; keystore = KeyStore.getInstance("JKS"); keystore.load(new FileInputStream(keyStorePath), storepass.toCharArray()); RSAPrivateKey privateRSAKey = (RSAPrivateKey) keystore.getKey(alias, keypass.toCharArray()); Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding"); cipher.init(Cipher.DECRYPT_MODE, privateRSAKey); cipherData = cipher.doFinal(data); System.out.println(new String(cipherData)); } Does anyone see a step missing or where the padding or item needs to be changed? I have done hours of reading on this site and others but haven't really found a concrete solution. You're help is vastly appreciated. Thanks. -Matt

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• VS 2010 beta 2 Web ReportViewer Bug?

  - by rip

  The report viewer doesn't seem to work in asp.net projects in VS 2010. You get the following error: Microsoft Jscript runtime error: ‘Microsoft’ is undefined. VS also breaks on the following line of javascript code: $create(Microsoft.Reporting.WebFormsClient.ReportViewer, {"_internalViewerId":"ctl00_MainContent_ReportViewer1_ctl03","id":"ctl00_MainContent_ReportViewer1"}, null, null); Steps to recreate problem: In Visual Studio 2010 beta 2 create a new asp.net project Drag a ScriptManager control on to default.aspx Drag a ReportViewer control on to default.aspx Build and run the project You then get the problem Is this a bug or am I doing something wrong?

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• Unable to resolve class in build.gradle using Android Studio 0.60/Gradle 0.11

  - by saywhatnow

  Established app working fine using Android Studio 0.5.9/ Gradle 0.9 but upgrading to Android Studio 0.6.0/ Gradle 0.11 causes the error below. Somehow Studio seems to have lost the ability to resolve the android tools import at the top of the build.gradle file. Anyone got any ideas on how to solve this? build file 'Users/[me]/Repositories/[project]/[module]/build.gradle': 1: unable to resolve class com.android.builder.DefaultManifestParser @ line 1, column 1. import com.android.builder.DefaultManifestParser 1 error at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:302) at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:858) at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:548) at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:497) at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:306) at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:287) at org.gradle.groovy.scripts.internal.DefaultScriptCompilationHandler.compileScript(DefaultScriptCompilationHandler.java:115) ... 77 more 2014-06-09 10:15:28,537 [ 92905] INFO - .BaseProjectImportErrorHandler - Failed to import Gradle project at '/Users/[me]/Repositories/[project]' org.gradle.tooling.BuildException: Could not run build action using Gradle distribution 'http://services.gradle.org/distributions/gradle-1.12-all.zip'. at org.gradle.tooling.internal.consumer.ResultHandlerAdapter.onFailure(ResultHandlerAdapter.java:53) at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor$1$1.run(DefaultAsyncConsumerActionExecutor.java:57) at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64) [project]/[module]/build.gradle import com.android.builder.DefaultManifestParser apply plugin: 'android-sdk-manager' apply plugin: 'android' android { sourceSets { main { manifest.srcFile 'src/main/AndroidManifest.xml' res.srcDirs = ['src/main/res'] } debug { res.srcDirs = ['src/debug/res'] } release { res.srcDirs = ['src/release/res'] } } compileSdkVersion 19 buildToolsVersion '19.0.0' defaultConfig { minSdkVersion 14 targetSdkVersion 19 } signingConfigs { release } buildTypes { release { runProguard false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt' signingConfig signingConfigs.release applicationVariants.all { variant -> def file = variant.outputFile def manifestParser = new DefaultManifestParser() def wmgVersionCode = manifestParser.getVersionCode(android.sourceSets.main.manifest.srcFile) println wmgVersionCode variant.outputFile = new File(file.parent, file.name.replace("-release.apk", "_" + wmgVersionCode + ".apk")) } } } packagingOptions { exclude 'META-INF/LICENSE.txt' exclude 'META-INF/NOTICE.txt' } } def Properties props = new Properties() def propFile = file('signing.properties') if (propFile.canRead()){ props.load(new FileInputStream(propFile)) if (props!=null && props.containsKey('STORE_FILE') && props.containsKey('STORE_PASSWORD') && props.containsKey('KEY_ALIAS') && props.containsKey('KEY_PASSWORD')) { println 'RELEASE BUILD SIGNING' android.signingConfigs.release.storeFile = file(props['STORE_FILE']) android.signingConfigs.release.storePassword = props['STORE_PASSWORD'] android.signingConfigs.release.keyAlias = props['KEY_ALIAS'] android.signingConfigs.release.keyPassword = props['KEY_PASSWORD'] } else { println 'RELEASE BUILD NOT FOUND SIGNING PROPERTIES' android.buildTypes.release.signingConfig = null } }else { println 'RELEASE BUILD NOT FOUND SIGNING FILE' android.buildTypes.release.signingConfig = null } repositories { maven { url 'https://repo.commonsware.com.s3.amazonaws.com' } maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' } } dependencies { compile 'com.github.gabrielemariotti.changeloglib:library:1.4.+' compile 'com.google.code.gson:gson:2.2.4' compile 'com.google.android.gms:play-services:+' compile 'com.android.support:appcompat-v7:+' compile 'com.squareup.okhttp:okhttp:1.5.+' compile 'com.octo.android.robospice:robospice:1.4.11' compile 'com.octo.android.robospice:robospice-cache:1.4.11' compile 'com.octo.android.robospice:robospice-retrofit:1.4.11' compile 'com.commonsware.cwac:security:0.1.+' compile 'com.readystatesoftware.sqliteasset:sqliteassethelper:+' compile 'com.android.support:support-v4:19.+' compile 'uk.co.androidalliance:edgeeffectoverride:1.0.1+' compile 'de.greenrobot:eventbus:2.2.1+' compile project(':captureActivity') compile ('de.keyboardsurfer.android.widget:crouton:1.8.+') { exclude group: 'com.google.android', module: 'support-v4' } compile files('libs/CWAC-LoaderEx.jar') }

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• XP Deploying issues due to msvcr90.dll trying to load FlsAlloc

  - by Sorin Sbarnea

  I have an application build with VS2008 SP1a (9.0.30729.4148) on Windows 7 x64 that does not want to start under XP. The message is The application failed to initialize properly (0x80000003). Click on OK to terminate the application.. I checked with depends.exe and found that msvcr90.dll does try to load FlsAlloc from KERNEL32.dll - and FlsAlloc is available only starting with Vista. I'm sure it is not used by the application. How to solve the issue? The SxS package is already installed on the target machine - In fact I have all 3 versions of 9.0 SxS (initial release, sp1, and sp1+security patch) Application is compiled with _BIND_TO_CURRENT_VCLIBS_VERSION=1 Also I defined the right target Windows version on stdafx.h #define WINVER 0x0500 #define _WIN32_WINNT 0x0500 Manifest file <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"> <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3"> <security> <requestedPrivileges> <requestedExecutionLevel level="asInvoker" uiAccess="false" /> </requestedPrivileges> </security> </trustInfo> <dependency> <dependentAssembly> <assemblyIdentity type="win32" name="Microsoft.VC90.CRT" version="9.0.30729.4148" processorArchitecture="x86" publicKeyToken="1fc8b3b9a1e18e3b" /> </dependentAssembly> </dependency> <dependency> <dependentAssembly> <assemblyIdentity type="win32" name="Microsoft.VC90.MFC" version="9.0.30729.4148" processorArchitecture="x86" publicKeyToken="1fc8b3b9a1e18e3b" /> </dependentAssembly> </dependency> </assembly> Result from depends Started "c:\program files\app\app.EXE" (process 0xA0) at address 0x00400000. Successfully hooked module. Loaded "c:\windows\system32\NTDLL.DLL" at address 0x7C900000. Successfully hooked module. Loaded "c:\windows\system32\KERNEL32.DLL" at address 0x7C800000. Successfully hooked module. Loaded "c:\program files\app\MFC90.DLL" at address 0x785E0000. Successfully hooked module. Loaded "c:\program files\app\MSVCR90.DLL" at address 0x78520000. Successfully hooked module. Loaded "c:\windows\system32\USER32.DLL" at address 0x7E410000. Successfully hooked module. Loaded "c:\windows\system32\GDI32.DLL" at address 0x77F10000. Successfully hooked module. Loaded "c:\windows\system32\SHLWAPI.DLL" at address 0x77F60000. Successfully hooked module. Loaded "c:\windows\system32\ADVAPI32.DLL" at address 0x77DD0000. Successfully hooked module. Loaded "c:\windows\system32\RPCRT4.DLL" at address 0x77E70000. Successfully hooked module. Loaded "c:\windows\system32\SECUR32.DLL" at address 0x77FE0000. Successfully hooked module. Loaded "c:\windows\system32\MSVCRT.DLL" at address 0x77C10000. Successfully hooked module. Loaded "c:\windows\system32\COMCTL32.DLL" at address 0x5D090000. Successfully hooked module. Loaded "c:\windows\system32\MSIMG32.DLL" at address 0x76380000. Successfully hooked module. Loaded "c:\windows\system32\SHELL32.DLL" at address 0x7C9C0000. Successfully hooked module. Loaded "c:\windows\system32\OLEAUT32.DLL" at address 0x77120000. Successfully hooked module. Loaded "c:\windows\system32\OLE32.DLL" at address 0x774E0000. Successfully hooked module. Entrypoint reached. All implicit modules have been loaded. DllMain(0x78520000, DLL_PROCESS_ATTACH, 0x0012FD30) in "c:\program files\app\MSVCR90.DLL" called. GetProcAddress(0x7C800000 [c:\windows\system32\KERNEL32.DLL], "FlsAlloc") called from "c:\program files\app\MSVCR90.DLL" at address 0x78543ACC and returned NULL. Error: The specified procedure could not be found (127). GetProcAddress(0x7C800000 [c:\windows\system32\KERNEL32.DLL], "FlsGetValue") called from "c:\program files\app\MSVCR90.DLL" at address 0x78543AD9 and returned NULL. Error: The specified procedure could not be found (127). GetProcAddress(0x7C800000 [c:\windows\system32\KERNEL32.DLL], "FlsSetValue") called from "c:\program files\app\MSVCR90.DLL" at address 0x78543AE6 and returned NULL. Error: The specified procedure could not be found (127). GetProcAddress(0x7C800000 [c:\windows\system32\KERNEL32.DLL], "FlsFree") called from "c:\program files\app\MSVCR90.DLL" at address 0x78543AF3 and returned NULL. Error: The specified procedure could not be found (127).

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• Quartz.Net Writing your first Hello World Job

  - by Tarun Arora

  In this blog post I’ll be covering, 01: A few things to consider before you should schedule a Job using Quartz.Net 02: Setting up your solution to use Quartz.Net API 03: Quartz.Net configuration 04: Writing & scheduling a hello world job with Quartz.Net If you are new to Quartz.Net I would recommend going through, A brief introduction to Quartz.net Walkthrough of Installing & Testing Quartz.Net as a Windows Service A few things to consider before you should schedule a Job using Quartz.Net - An instance of the scheduler service - A trigger - And last but not the least a job For example, if I wanted to schedule a script to run on the server, I should be jotting down answers to the below questions, a. Considering there are multiple machines set up with Quartz.Net windows service, how can I choose the instance of Quartz.Net where I want my script to be run b. What will trigger the execution of the job c. How often do I want the job to run d. Do I want the job to run right away or start after a delay or may be have the job start at a specific time e. What will happen to my job if Quartz.Net windows service is reset f. Do I want multiple instances of this job to run concurrently g. Can I pass parameters to the job being executed by Quartz.Net windows service Setting up your solution to use Quartz.Net API 1. Create a new C# Console Application project and call it “HelloWorldQuartzDotNet” and add a reference to Quartz.Net.dll. I use the NuGet Package Manager to add the reference. This can be done by right clicking references and choosing Manage NuGet packages, from the Nuget Package Manager choose Online from the left panel and in the search box on the right search for Quartz.Net. Click Install on the package “Quartz” (Screen shot below). 2. Right click the project and choose Add New Item. Add a new Interface and call it ‘IScheduledJob.cs’. Mark the Interface public and add the signature for Run. Your interface should look like below. namespace HelloWorldQuartzDotNet { public interface IScheduledJob { void Run(); } }   3. Right click the project and choose Add new Item. Add a class and call it ‘Scheduled Job’. Use this class to implement the interface ‘IscheduledJob.cs’. Look at the pseudo code in the implementation of the Run method. using System; namespace HelloWorldQuartzDotNet { class ScheduledJob : IScheduledJob { public void Run() { // Get an instance of the Quartz.Net scheduler // Define the Job to be scheduled // Associate a trigger with the Job // Assign the Job to the scheduler throw new NotImplementedException(); } } }   I’ll get into the implementation in more detail, but let’s look at the minimal configuration a sample configuration file for Quartz.Net service to work. Quartz.Net configuration In the App.Config file copy the below configuration <?xml version="1.0" encoding="utf-8" ?> <configuration> <configSections> <section name="quartz" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0,Culture=neutral, PublicKeyToken=b77a5c561934e089" /> </configSections> <quartz> <add key="quartz.scheduler.instanceName" value="ServerScheduler" /> <add key="quartz.threadPool.type" value="Quartz.Simpl.SimpleThreadPool, Quartz" /> <add key="quartz.threadPool.threadCount" value="10" /> <add key="quartz.threadPool.threadPriority" value="2" /> <add key="quartz.jobStore.misfireThreshold" value="60000" /> <add key="quartz.jobStore.type" value="Quartz.Simpl.RAMJobStore, Quartz" /> </quartz> </configuration>   As you can see in the configuration above, I have included the instance name of the quartz scheduler, the thread pool type, count and priority, the job store type has been defined as RAM. You have the option of configuring that to ADO.NET JOB store. More details here. Writing & scheduling a hello world job with Quartz.Net Once fully implemented the ScheduleJob.cs class should look like below. I’ll walk you through the details of the implementation… - GetScheduler() uses the name of the quartz.net and listens on localhost port 555 to try and connect to the quartz.net windows service. - Run() an attempt is made to start the scheduler in case it is in standby mode - I have defined a job “WriteHelloToConsole” (that’s the name of the job), this job belongs to the group “IT”. Think of group as a logical grouping feature. It helps you bucket jobs into groups. Quartz.Net gives you the ability to pause or delete all jobs in a group (We’ll look at that in some of the future posts). I have requested for recovery of this job in case the quartz.net service fails over to the other node in the cluster. The jobType is “HelloWorldJob”. This is the class that would be called to execute the job. More details on this below… - I have defined a trigger for my job. I have called the trigger “WriteHelloToConsole”. The Trigger works on the cron schedule “0 0/1 * 1/1 * ? *” which means fire the job once every minute. I would recommend that you look at www.cronmaker.com a free and great website to build and parse cron expressions. The trigger has a priority 1. So, if two jobs are run at the same time, this trigger will have high priority and will be run first. - Use the Job and Trigger to schedule the job. This method returns a datetime offeset. It is possible to see the next fire time for the job from this variable. using System.Collections.Specialized; using System.Configuration; using Quartz; using System; using Quartz.Impl; namespace HelloWorldQuartzDotNet { class ScheduledJob : IScheduledJob { public void Run() { // Get an instance of the Quartz.Net scheduler var schd = GetScheduler(); // Start the scheduler if its in standby if (!schd.IsStarted) schd.Start(); // Define the Job to be scheduled var job = JobBuilder.Create<HelloWorldJob>() .WithIdentity("WriteHelloToConsole", "IT") .RequestRecovery() .Build(); // Associate a trigger with the Job var trigger = (ICronTrigger)TriggerBuilder.Create() .WithIdentity("WriteHelloToConsole", "IT") .WithCronSchedule("0 0/1 * 1/1 * ? *") // visit http://www.cronmaker.com/ Queues the job every minute .WithPriority(1) .Build(); // Assign the Job to the scheduler var schedule = schd.ScheduleJob(job, trigger); Console.WriteLine("Job '{0}' scheduled for '{1}'", "", schedule.ToString("r")); } // Get an instance of the Quartz.Net scheduler private static IScheduler GetScheduler() { try { var properties = new NameValueCollection(); properties["quartz.scheduler.instanceName"] = "ServerScheduler"; // set remoting expoter properties["quartz.scheduler.proxy"] = "true"; properties["quartz.scheduler.proxy.address"] = string.Format("tcp://{0}:{1}/{2}", "localhost", "555", "QuartzScheduler"); // Get a reference to the scheduler var sf = new StdSchedulerFactory(properties); return sf.GetScheduler(); } catch (Exception ex) { Console.WriteLine("Scheduler not available: '{0}'", ex.Message); throw; } } } }   The above highlighted values have been taken from the Quartz.config file, this file is available in the Quartz.net server installation directory. Implementation of my HelloWorldJob Class below. The HelloWorldJob class gets called to execute the job “WriteHelloToConsole” using the once every minute trigger set up for this job. The HelloWorldJob is a class that implements the interface IJob. I’ll walk you through the details of the implementation… - context is passed to the method execute by the quartz.net scheduler service. This has everything you need to pull out the job, trigger specific information. - for example. I have pulled out the value of the jobKey name, the fire time and next fire time. using Quartz; using System; namespace HelloWorldQuartzDotNet { class HelloWorldJob : IJob { public void Execute(IJobExecutionContext context) { try { Console.WriteLine("Job {0} fired @ {1} next scheduled for {2}", context.JobDetail.Key, context.FireTimeUtc.Value.ToString("r"), context.NextFireTimeUtc.Value.ToString("r")); Console.WriteLine("Hello World!"); } catch (Exception ex) { Console.WriteLine("Failed: {0}", ex.Message); } } } }   I’ll add a call to call the scheduler in the Main method in Program.cs using System; using System.Threading; namespace HelloWorldQuartzDotNet { class Program { static void Main(string[] args) { try { var sj = new ScheduledJob(); sj.Run(); Thread.Sleep(10000 * 10000); } catch (Exception ex) { Console.WriteLine("Failed: {0}", ex.Message); } } } }   This was third in the series of posts on enterprise scheduling using Quartz.net, in the next post I’ll be covering how to pass parameters to the scheduled task scheduled on Quartz.net windows service. Thank you for taking the time out and reading this blog post. If you enjoyed the post, remember to subscribe to http://feeds.feedburner.com/TarunArora. Stay tuned!

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• Unable to Create New Incidents in Dynamics CRM with Java and Axis2

  - by Lutz

  So I've been working on trying to figure this out, oddly when I ran it one machine I got a generic Axis Fault with no description, but now on another machine I'm getting a different error message, but I'm still stuck. Basically I'm just trying to do what I thought would be a fairly trivial task of creating a new incident in Microsoft Dynamics CRM 4.0 via a web services call. I started by downloading the XML from http://hostname/MSCrmServices/2007/CrmService.asmx and generating code from it using Axis2. Anyway, here's my program, any help would be greatly appreciated, as I've been stuck on this for way longer than I thought I'd be and I'm really out of ideas here. public class TestCRM { private static String endpointURL = "http://theHost/MSCrmServices/2007/CrmService.asmx"; private static String userName = "myUserNameHere"; private static String password = "myPasswordHere"; private static String host = "theHostname"; private static int port = 80; private static String domain = "theDomain"; private static String orgName = "theOrganization"; public static void main(String[] args) { CrmServiceStub stub; try { stub = new CrmServiceStub(endpointURL); setOptions(stub._getServiceClient().getOptions()); RetrieveMultipleDocument rmd = RetrieveMultipleDocument.Factory.newInstance(); com.microsoft.schemas.crm._2007.webservices.RetrieveMultipleDocument.RetrieveMultiple rm = com.microsoft.schemas.crm._2007.webservices.RetrieveMultipleDocument.RetrieveMultiple.Factory.newInstance(); QueryExpression query = QueryExpression.Factory.newInstance(); query.setColumnSet(AllColumns.Factory.newInstance()); query.setEntityName(EntityName.INCIDENT.toString()); rm.setQuery(query); rmd.setRetrieveMultiple(rm); TargetCreateIncident tinc = TargetCreateIncident.Factory.newInstance(); Incident inc = tinc.addNewIncident(); inc.setDescription("This is a test of ticket creation through a web services call."); CreateDocument cd = CreateDocument.Factory.newInstance(); Create create = Create.Factory.newInstance(); create.setEntity(inc); cd.setCreate(create); Incident test = (Incident)cd.getCreate().getEntity(); CrmAuthenticationTokenDocument catd = CrmAuthenticationTokenDocument.Factory.newInstance(); CrmAuthenticationToken token = CrmAuthenticationToken.Factory.newInstance(); token.setAuthenticationType(0); token.setOrganizationName(orgName); catd.setCrmAuthenticationToken(token); //The two printlns below spit back XML that looks okay to me? System.out.println(cd); System.out.println(catd); /* stuff that doesn't work */ CreateResponseDocument crd = stub.create(cd, catd, null, null); //this line throws the error CreateResponse cr = crd.getCreateResponse(); System.out.println("create result: " + cr.getCreateResult()); /* End stuff that doesn't work */ System.out.println(); System.out.println(); System.out.println(); boolean fetchNext = true; while(fetchNext){ RetrieveMultipleResponseDocument rmrd = stub.retrieveMultiple(rmd, catd, null, null); //This retrieve using the CRMAuthenticationToken catd works just fine RetrieveMultipleResponse rmr = rmrd.getRetrieveMultipleResponse(); BusinessEntityCollection bec = rmr.getRetrieveMultipleResult(); String pagingCookie = bec.getPagingCookie(); fetchNext = bec.getMoreRecords(); ArrayOfBusinessEntity aobe = bec.getBusinessEntities(); BusinessEntity[] myEntitiesAtLast = aobe.getBusinessEntityArray(); for(int i=0; i<myEntitiesAtLast.length; i++){ //cast to whatever you asked for... Incident myEntity = (Incident) myEntitiesAtLast[i]; System.out.println("["+(i+1)+"]: " + myEntity); } } } catch (Exception e) { e.printStackTrace(); } } private static void setOptions(Options options){ HttpTransportProperties.Authenticator auth = new HttpTransportProperties.Authenticator(); List authSchemes = new ArrayList(); authSchemes.add(HttpTransportProperties.Authenticator.NTLM); auth.setAuthSchemes(authSchemes); auth.setUsername(userName); auth.setPassword(password); auth.setHost(host); auth.setPort(port); auth.setDomain(domain); auth.setPreemptiveAuthentication(false); options.setProperty(HTTPConstants.AUTHENTICATE, auth); options.setProperty(HTTPConstants.REUSE_HTTP_CLIENT, "true"); } } Also, here's the error message I receive: org.apache.axis2.AxisFault: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character 'S' (code 83) in prolog; expected '<' at [row,col {unknown-source}]: [1,1] at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430) at org.apache.axis2.transport.TransportUtils.createSOAPMessage(TransportUtils.java:123) at org.apache.axis2.transport.TransportUtils.createSOAPMessage(TransportUtils.java:67) at org.apache.axis2.description.OutInAxisOperationClient.handleResponse(OutInAxisOperation.java:354) at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:417) at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:229) at org.apache.axis2.client.OperationClient.execute(OperationClient.java:165) at com.spanlink.crm.dynamics4.webservice.CrmServiceStub.create(CrmServiceStub.java:618) at com.spanlink.crm.dynamics4.runtime.TestCRM.main(TestCRM.java:82) Caused by: org.apache.axiom.om.OMException: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character 'S' (code 83) in prolog; expected '<' at [row,col {unknown-source}]: [1,1] at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:260) at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.getSOAPEnvelope(StAXSOAPModelBuilder.java:161) at org.apache.axiom.soap.impl.builder.StAXSOAPModelBuilder.<init>(StAXSOAPModelBuilder.java:110) at org.apache.axis2.builder.BuilderUtil.getSOAPBuilder(BuilderUtil.java:682) at org.apache.axis2.transport.TransportUtils.createDocumentElement(TransportUtils.java:215) at org.apache.axis2.transport.TransportUtils.createSOAPMessage(TransportUtils.java:145) at org.apache.axis2.transport.TransportUtils.createSOAPMessage(TransportUtils.java:108) ... 7 more Caused by: com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character 'S' (code 83) in prolog; expected '<' at [row,col {unknown-source}]: [1,1] at com.ctc.wstx.sr.StreamScanner.throwUnexpectedChar(StreamScanner.java:623) at com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:2047) at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1069) at javax.xml.stream.util.StreamReaderDelegate.next(StreamReaderDelegate.java:60) at org.apache.axiom.om.impl.builder.SafeXMLStreamReader.next(SafeXMLStreamReader.java:183) at org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:597) at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:172) ... 13 more

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• Shell extension installation not recognized by Windows 7 64-bit shell

  - by Avalanchis

  I have a Copy Hook Handler shell extension that I'm trying to install on Windows 7 64-bit. The shell extension DLL is compiled in two separate versions for 32-bit and 64-bit Windows. The DLL implements DLLRegisterServer which adds the necessary registry entries. After adding the registry entries, it calls the following line of code to nofity the Windows shell: SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, NULL, NULL); Everything works great on Windows7 32-bit. The shell recognizes the extension immediately. On 64-bit, the shell extension is only recognized after the shell is restarted. Is there anything I can do to cause the extension to be recognized without restarting the 64-bit shell?

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• Write a function that compares two strings and returns a third string containing only the letters th

  - by Pritam

  Hi All, I got this homework. And have solved it in following way. I need your comments whether it is a good approach or I need to use any other data sturcture to solve it in better way. public string ReturnCommon(string firstString, string scndString) { StringBuilder newStb = new StringBuilder(); if (firstString != null && scndString != null) { foreach (char ichar in firstString) { if (!newStb.ToString().Contains(ichar) && scndString.Contains(ichar)) newStb.Append(ichar); } } return newStb.ToString(); }

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• How to compare nullable types?

  - by David_001

  I have a few places where I need to compare 2 (nullable) values, to see if they're the same. I think there should be something in the framework to support this, but can't find anything, so instead have the following: public static bool IsDifferentTo(this bool? x, bool? y) { return (x.HasValue != y.HasValue) ? true : x.HasValue && x.Value != y.Value; } Then, within code I have if (x.IsDifferentTo(y)) ... I then have similar methods for nullable ints, nullable doubles etc. Is there not an easier way to see if two nullable types are the same? Update: Turns out that the reason this method existed was because the code has been converted from VB.Net, where Nothing = Nothing returns false (compare to C# where null == null returns true). The VB.Net code should have used .Equals... instead.

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• Inner synchronization on the same object as the outer synchronization

  - by Yaneeve

  Recently I attended a lecture concerning some design patterns: The following code had been displayed: public static Singleton getInstance() { if (instance == null) { synchronized(Singleton.class) { //1 Singleton inst = instance; //2 if (inst == null) { synchronized(Singleton.class) { //3 inst = new Singleton(); //4 } instance = inst; //5 } } } return instance; } taken from: Double-checked locking: Take two My question has nothing to do with the above mentioned pattern but with the synchronized block: Is there any benefit whatsoever to the double synchronization done in lines 1 & 3 with regards to the fact that the synchronize operation is done on the same Object?

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• Application Specific Paths for DLL Loading when DLL is loaded dynamically

  - by MartinHT

  Hi: I am building a program that uses a very simple plugin system. This is the code I'm using to load the possible plugins: public interface IPlugin { string Name { get; } string Description { get; } bool Execute(System.Windows.Forms.IWin32Window parent); } private void loadPlugins() { int idx = 0; string[] pluginFolders = getPluginFolders(); Array.ForEach(pluginFolders, folder => { string[] pluginFiles = getPluginFiles(folder); Array.ForEach(pluginFiles, file => { try { System.Reflection.Assembly assembly = System.Reflection.Assembly.LoadFile(file); Array.ForEach(assembly.GetTypes(), type => { if(type.GetInterface("PluginExecutor.IPlugin") != null) { IPlugin plugin = assembly.CreateInstance(type.ToString()) as IPlugin; if(plugin != null) lista.Add(new PluginItem(plugin.Name, plugin.Description, file, plugin)); } }); } catch(Exception) { } }); }); } When the user selects a particular plugin from the list, I launch the plugin's Execute method. So far, so good! As you can see the plugins are loaded from a folder, and within the folder are several dll's that are needed but the plugin. My problem is that I can't get the plugin to 'see' the dlls, it just searches the launching applications startup folder, but not the folder where the plugin was loaded from. I have tried several methods: 1. Changing the Current Directory to the plugins folder. 2. Using an inter-op call to SetDllDirectory 3. Adding an entry in the registry to point to a folder where I want it to look (see code below) None of these methods work. What am I missing? As I load the dll plugin dynamically, it does not seem to obey any of the above mentioned methods. What else can I try? Regards, MartinH. //HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths Microsoft.Win32.RegistryKey appPaths = Microsoft.Win32.Registry.LocalMachine.CreateSubKey( string.Format( @"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\{0}", System.IO.Path.GetFileName(Application.ExecutablePath)), Microsoft.Win32.RegistryKeyPermissionCheck.ReadWriteSubTree); appPaths.SetValue(string.Empty, Application.ExecutablePath); object path = appPaths.GetValue("Path"); if(path == null) appPaths.SetValue("Path", System.IO.Path.GetDirectoryName(pluginItem.FileName)); else { string strPath = string.Format("{0};{1}", path, System.IO.Path.GetDirectoryName(pluginItem.FileName)); appPaths.SetValue("Path", strPath); } appPaths.Flush();

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• Transactional Messaging in the Windows Azure Service Bus

  - by Alan Smith

  Introduction I’m currently working on broadening the content in the Windows Azure Service Bus Developer Guide. One of the features I have been looking at over the past week is the support for transactional messaging. When using the direct programming model and the WCF interface some, but not all, messaging operations can participate in transactions. This allows developers to improve the reliability of messaging systems. There are some limitations in the transactional model, transactions can only include one top level messaging entity (such as a queue or topic, subscriptions are no top level entities), and transactions cannot include other systems, such as databases. As the transaction model is currently not well documented I have had to figure out how things work through experimentation, with some help from the development team to confirm any questions I had. Hopefully I’ve got the content mostly correct, I will update the content in the e-book if I find any errors or improvements that can be made (any feedback would be very welcome). I’ve not had a chance to look into the code for transactions and asynchronous operations, maybe that would make a nice challenge lab for my Windows Azure Service Bus course. Transactional Messaging Messaging entities in the Windows Azure Service Bus provide support for participation in transactions. This allows developers to perform several messaging operations within a transactional scope, and ensure that all the actions are committed or, if there is a failure, none of the actions are committed. There are a number of scenarios where the use of transactions can increase the reliability of messaging systems. Using TransactionScope In .NET the TransactionScope class can be used to perform a series of actions in a transaction. The using declaration is typically used de define the scope of the transaction. Any transactional operations that are contained within the scope can be committed by calling the Complete method. If the Complete method is not called, any transactional methods in the scope will not commit.   // Create a transactional scope. using (TransactionScope scope = new TransactionScope()) {     // Do something.       // Do something else.       // Commit the transaction.     scope.Complete(); }     In order for methods to participate in the transaction, they must provide support for transactional operations. Database and message queue operations typically provide support for transactions. Transactions in Brokered Messaging Transaction support in Service Bus Brokered Messaging allows message operations to be performed within a transactional scope; however there are some limitations around what operations can be performed within the transaction. In the current release, only one top level messaging entity, such as a queue or topic can participate in a transaction, and the transaction cannot include any other transaction resource managers, making transactions spanning a messaging entity and a database not possible. When sending messages, the send operations can participate in a transaction allowing multiple messages to be sent within a transactional scope. This allows for “all or nothing” delivery of a series of messages to a single queue or topic. When receiving messages, messages that are received in the peek-lock receive mode can be completed, deadlettered or deferred within a transactional scope. In the current release the Abandon method will not participate in a transaction. The same restrictions of only one top level messaging entity applies here, so the Complete method can be called transitionally on messages received from the same queue, or messages received from one or more subscriptions in the same topic. Sending Multiple Messages in a Transaction A transactional scope can be used to send multiple messages to a queue or topic. This will ensure that all the messages will be enqueued or, if the transaction fails to commit, no messages will be enqueued.     An example of the code used to send 10 messages to a queue as a single transaction from a console application is shown below.   QueueClient queueClient = messagingFactory.CreateQueueClient(Queue1);   Console.Write("Sending");   // Create a transaction scope. using (TransactionScope scope = new TransactionScope()) {     for (int i = 0; i < 10; i++)     {         // Send a message         BrokeredMessage msg = new BrokeredMessage("Message: " + i);         queueClient.Send(msg);         Console.Write(".");     }     Console.WriteLine("Done!");     Console.WriteLine();       // Should we commit the transaction?     Console.WriteLine("Commit send 10 messages? (yes or no)");     string reply = Console.ReadLine();     if (reply.ToLower().Equals("yes"))     {         // Commit the transaction.         scope.Complete();     } } Console.WriteLine(); messagingFactory.Close();     The transaction scope is used to wrap the sending of 10 messages. Once the messages have been sent the user has the option to either commit the transaction or abandon the transaction. If the user enters “yes”, the Complete method is called on the scope, which will commit the transaction and result in the messages being enqueued. If the user enters anything other than “yes”, the transaction will not commit, and the messages will not be enqueued. Receiving Multiple Messages in a Transaction The receiving of multiple messages is another scenario where the use of transactions can improve reliability. When receiving a group of messages that are related together, maybe in the same message session, it is possible to receive the messages in the peek-lock receive mode, and then complete, defer, or deadletter the messages in one transaction. (In the current version of Service Bus, abandon is not transactional.)   The following code shows how this can be achieved. using (TransactionScope scope = new TransactionScope()) {       while (true)     {         // Receive a message.         BrokeredMessage msg = q1Client.Receive(TimeSpan.FromSeconds(1));         if (msg != null)         {             // Wrote message body and complete message.             string text = msg.GetBody<string>();             Console.WriteLine("Received: " + text);             msg.Complete();         }         else         {             break;         }     }     Console.WriteLine();       // Should we commit?     Console.WriteLine("Commit receive? (yes or no)");     string reply = Console.ReadLine();     if (reply.ToLower().Equals("yes"))     {         // Commit the transaction.         scope.Complete();     }     Console.WriteLine(); }     Note that if there are a large number of messages to be received, there will be a chance that the transaction may time out before it can be committed. It is possible to specify a longer timeout when the transaction is created, but It may be better to receive and commit smaller amounts of messages within the transaction. It is also possible to complete, defer, or deadletter messages received from more than one subscription, as long as all the subscriptions are contained in the same topic. As subscriptions are not top level messaging entities this scenarios will work. The following code shows how this can be achieved. try {     using (TransactionScope scope = new TransactionScope())     {         // Receive one message from each subscription.         BrokeredMessage msg1 = subscriptionClient1.Receive();         BrokeredMessage msg2 = subscriptionClient2.Receive();           // Complete the message receives.         msg1.Complete();         msg2.Complete();           Console.WriteLine("Msg1: " + msg1.GetBody<string>());         Console.WriteLine("Msg2: " + msg2.GetBody<string>());           // Commit the transaction.         scope.Complete();     } } catch (Exception ex) {     Console.WriteLine(ex.Message); }     Unsupported Scenarios The restriction of only one top level messaging entity being able to participate in a transaction makes some useful scenarios unsupported. As the Windows Azure Service Bus is under continuous development and new releases are expected to be frequent it is possible that this restriction may not be present in future releases. The first is the scenario where messages are to be routed to two different systems. The following code attempts to do this.   try {     // Create a transaction scope.     using (TransactionScope scope = new TransactionScope())     {         BrokeredMessage msg1 = new BrokeredMessage("Message1");         BrokeredMessage msg2 = new BrokeredMessage("Message2");           // Send a message to Queue1         Console.WriteLine("Sending Message1");         queue1Client.Send(msg1);           // Send a message to Queue2         Console.WriteLine("Sending Message2");         queue2Client.Send(msg2);           // Commit the transaction.         Console.WriteLine("Committing transaction...");         scope.Complete();     } } catch (Exception ex) {     Console.WriteLine(ex.Message); }     The results of running the code are shown below. When attempting to send a message to the second queue the following exception is thrown: No active Transaction was found for ID '35ad2495-ee8a-4956-bbad-eb4fedf4a96e:1'. The Transaction may have timed out or attempted to span multiple top-level entities such as Queue or Topic. The server Transaction timeout is: 00:01:00..TrackingId:947b8c4b-7754-4044-b91b-4a959c3f9192_3_3,TimeStamp:3/29/2012 7:47:32 AM.   Another scenario where transactional support could be useful is when forwarding messages from one queue to another queue. This would also involve more than one top level messaging entity, and is therefore not supported.   Another scenario that developers may wish to implement is performing transactions across messaging entities and other transactional systems, such as an on-premise database. In the current release this is not supported.   Workarounds for Unsupported Scenarios There are some techniques that developers can use to work around the one top level entity limitation of transactions. When sending two messages to two systems, topics and subscriptions can be used. If the same message is to be sent to two destinations then the subscriptions would have the default subscriptions, and the client would only send one message. If two different messages are to be sent, then filters on the subscriptions can route the messages to the appropriate destination. The client can then send the two messages to the topic in the same transaction.   In scenarios where a message needs to be received and then forwarded to another system within the same transaction topics and subscriptions can also be used. A message can be received from a subscription, and then sent to a topic within the same transaction. As a topic is a top level messaging entity, and a subscription is not, this scenario will work.

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• ASPxGridView Pager disappears

  - by Jo Asakura

  Hello all, I use the ASPxGridView with paging, pager settings is next: <SettingsPager Mode="ShowPager" Position="Bottom" Visible="true"> Also I have a CustomButtonInitialize event: protected void gridViewInvoices_CustomButtonInitialize(object sender, ASPxGridViewCustomButtonEventArgs e) { if (!e.IsEditingRow) { Invoice invoice = (Invoice)gridViewInvoices.GetRow(e.VisibleIndex); if (invoice != null) { if (e.ButtonID == "btnConfirmPayment") { e.Visible = invoice.PaymentConfirmedDate.HasValue ? DefaultBoolean.False : DefaultBoolean.Default; } } } } When I open the page with this grid the pager disappears but if I comment my CustomButtonInitialize event: protected void gridViewInvoices_CustomButtonInitialize(object sender, ASPxGridViewCustomButtonEventArgs e) { /*if (!e.IsEditingRow) { Invoice invoice = (Invoice)gridViewInvoices.GetRow(e.VisibleIndex); if (invoice != null) { if (e.ButtonID == "btnConfirmPayment") { e.Visible = invoice.PaymentConfirmedDate.HasValue ? DefaultBoolean.False : DefaultBoolean.Default; } } }*/ } Pager appears again, how can I fix it and how is pager depend on this event (CustomButtonInitialize)? Best regards, Alex.

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• General type conversion without risking Exceptions

  - by Mongus Pong

  I am working on a control that can take a number of different datatypes (anything that implements IComparable). I need to be able to compare these with another variable passed in. If the main datatype is a DateTime, and I am passed a String, I need to attempt to convert the String to a DateTime to perform a Date comparison. if the String cannot be converted to a DateTime then do a String comparison. So I need a general way to attempt to convert from any type to any type. Easy enough, .Net provides us with the TypeConverter class. Now, the best I can work out to do to determine if the String can be converted to a DateTime is to use exceptions. If the ConvertFrom raises an exception, I know I cant do the conversion and have to do the string comparison. The following is the best I got : string theString = "99/12/2009"; DateTime theDate = new DateTime ( 2009, 11, 1 ); IComparable obj1 = theString as IComparable; IComparable obj2 = theDate as IComparable; try { TypeConverter converter = TypeDescriptor.GetConverter ( obj2.GetType () ); if ( converter.CanConvertFrom ( obj1.GetType () ) ) { Console.WriteLine ( obj2.CompareTo ( converter.ConvertFrom ( obj1 ) ) ); Console.WriteLine ( "Date comparison" ); } } catch ( FormatException ) { Console.WriteLine ( obj1.ToString ().CompareTo ( obj2.ToString () ) ); Console.WriteLine ( "String comparison" ); } Part of our standards at work state that : Exceptions should only be raised when an Exception situation - ie. an error is encountered. But this is not an exceptional situation. I need another way around it. Most variable types have a TryParse method which returns a boolean to allow you to determine if the conversion has succeeded or not. But there is no TryConvert method available to TypeConverter. CanConvertFrom only dermines if it is possible to convert between these types and doesnt consider the actual data to be converted. The IsValid method is also useless. Any ideas? EDIT I cannot use AS and IS. I do not know either data types at compile time. So I dont know what to As and Is to!!! EDIT Ok nailed the bastard. Its not as tidy as Marc Gravells, but it works (I hope). Thanks for the inpiration Marc. Will work on tidying it up when I get the time, but I've got a bit stack of bugfixes that I have to get on with. public static class CleanConverter { /// <summary> /// Stores the cache of all types that can be converted to all types. /// </summary> private static Dictionary<Type, Dictionary<Type, ConversionCache>> _Types = new Dictionary<Type, Dictionary<Type, ConversionCache>> (); /// <summary> /// Try parsing. /// </summary> /// <param name="s"></param> /// <param name="value"></param> /// <returns></returns> public static bool TryParse ( IComparable s, ref IComparable value ) { // First get the cached conversion method. Dictionary<Type, ConversionCache> type1Cache = null; ConversionCache type2Cache = null; if ( !_Types.ContainsKey ( s.GetType () ) ) { type1Cache = new Dictionary<Type, ConversionCache> (); _Types.Add ( s.GetType (), type1Cache ); } else { type1Cache = _Types[s.GetType ()]; } if ( !type1Cache.ContainsKey ( value.GetType () ) ) { // We havent converted this type before, so create a new conversion type2Cache = new ConversionCache ( s.GetType (), value.GetType () ); // Add to the cache type1Cache.Add ( value.GetType (), type2Cache ); } else { type2Cache = type1Cache[value.GetType ()]; } // Attempt the parse return type2Cache.TryParse ( s, ref value ); } /// <summary> /// Stores the method to convert from Type1 to Type2 /// </summary> internal class ConversionCache { internal bool TryParse ( IComparable s, ref IComparable value ) { if ( this._Method != null ) { // Invoke the cached TryParse method. object[] parameters = new object[] { s, value }; bool result = (bool)this._Method.Invoke ( null, parameters); if ( result ) value = parameters[1] as IComparable; return result; } else return false; } private MethodInfo _Method; internal ConversionCache ( Type type1, Type type2 ) { // Use reflection to get the TryParse method from it. this._Method = type2.GetMethod ( "TryParse", new Type[] { type1, type2.MakeByRefType () } ); } } }

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• ASP.NET GridView second header row to span main header row

  - by Dana Robinson

  I have an ASP.NET GridView which has columns that look like this: | Foo | Bar | Total1 | Total2 | Total3 | Is it possible to create a header on two rows that looks like this? | | Totals | | Foo | Bar | 1 | 2 | 3 | The data in each row will remain unchanged as this is just to pretty up the header and decrease the horizontal space that the grid takes up. The entire GridView is sortable in case that matters. I don't intend for the added "Totals" spanning column to have any sort functionality. Edit: Based on one of the articles given below, I created a class which inherits from GridView and adds the second header row in. namespace CustomControls { public class TwoHeadedGridView : GridView { protected Table InnerTable { get { if (this.HasControls()) { return (Table)this.Controls[0]; } return null; } } protected override void OnDataBound(EventArgs e) { base.OnDataBound(e); this.CreateSecondHeader(); } private void CreateSecondHeader() { GridViewRow row = new GridViewRow(0, -1, DataControlRowType.Header, DataControlRowState.Normal); TableCell left = new TableHeaderCell(); left.ColumnSpan = 3; row.Cells.Add(left); TableCell totals = new TableHeaderCell(); totals.ColumnSpan = this.Columns.Count - 3; totals.Text = "Totals"; row.Cells.Add(totals); this.InnerTable.Rows.AddAt(0, row); } } } In case you are new to ASP.NET like I am, I should also point out that you need to: 1) Register your class by adding a line like this to your web form: <%@ Register TagPrefix="foo" NameSpace="CustomControls" Assembly="__code"%> 2) Change asp:GridView in your previous markup to foo:TwoHeadedGridView. Don't forget the closing tag. Another edit: You can also do this without creating a custom class. Simply add an event handler for the DataBound event of your grid like this: protected void gvOrganisms_DataBound(object sender, EventArgs e) { GridView grid = sender as GridView; if (grid != null) { GridViewRow row = new GridViewRow(0, -1, DataControlRowType.Header, DataControlRowState.Normal); TableCell left = new TableHeaderCell(); left.ColumnSpan = 3; row.Cells.Add(left); TableCell totals = new TableHeaderCell(); totals.ColumnSpan = grid.Columns.Count - 3; totals.Text = "Totals"; row.Cells.Add(totals); Table t = grid.Controls[0] as Table; if (t != null) { t.Rows.AddAt(0, row); } } } The advantage of the custom control is that you can see the extra header row on the design view of your web form. The event handler method is a bit simpler, though.

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• access violation in wglMakeCurrent

  - by Stefan

  Sometimes in my OpenGL application I get an access violation in the following API call: wglMakeCurrent(NULL, NULL); The application only has one single thread, and I've checked that before that call, both the DC and HGLRC that are currently used are correct and valid. There are three different windows with OpenGL content, and they're all redrawn on WM_PAINT messages and if a refresh is required due to user interaction (e.g., picking an object). Also this access violation happens on different machines with different graphic cards, so I don't think it's a driver issue. What could make this API call crash? What should I investigate in the app code to find out where/why this happens? I'm really lost here since I've checked everything I could think of already. I hope someone can give me hints/ideas on what more to check.

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• JSF a4j:commandButton not working when 'disabled' is set

  - by Jon

  Hello, When I include a 'disabled' attribute on an a4j:commandButton, the button's action is not performed. Taking the 'disabled' attribute out causes it to work properly. I am not doing any special validation (that I'm aware of) and am not seeing any validation error messages. Here is part of my page: <t:dataTable id="myTable" var="region" value="#{MyPageBackingBean.regions}" width="100%"> ... <a4j:commandButton value="Update" action="#{region.doUpdate}" oncomplete="alert('done');" disabled="#{!empty region && region.messageEmpty}" immediate="true"/> ... </t:dataTable> Any ideas? Thanks! Edit: I tried setting preserveDataModel="true" on the t:dataTable to no avail. I also made a test having an a4j:commandButton and text box with no data table, but the backing bean action is still not being fired: <h:form> <a4j:region> <a4j:outputPanel id="testregion"> <h:messages id="messages"/> <a4j:status> <f:facet name="start"> <h:graphicImage value="/images/progress_indicator.gif"/> </f:facet> </a4j:status> <h:inputTextarea rows="5" value="#{MyPageBackingBean.myValue}" style="width:100%; border: 1px solid #99CCFF;"> <a4j:support event="onkeyup" reRender="testregion" eventsQueue="messageModificationQueue" ignoreDupResponses="true" requestDelay="500"/> </h:inputTextarea> <a4j:commandButton id="doDelete" value="Delete" action="#{MyPageBackingBean.dummy}" reRender="testregion" disabled="#{empty MyPageBackingBean.myValue}"/> <h:outputText value="#{MyPageBackingBean.myValue}"/> </a4j:outputPanel> </a4j:region> </h:form> Here is the new backing bean code used for testing: private String m_myValue = null; public String getMyValue() { return m_myValue; } public void setMyValue(String value) { m_myValue = value; } private String mystr2 = null; public String dummy() { mystr2 = "hello"; return null; } Thanks!

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• How can I extend DynamicQuery.cs to implement a .Single method?

  - by Yoenhofen

  I need to write some dynamic queries for a project I'm working on. I'm finding out that a significant amount of time is being spent by my program on the Count and First methods, so I started to change to .Single, only to find out that there is no such method. The code below was my first attempt at creating one (mostly copied from the Where method), but it's not working. Help? public static object Single(this IQueryable source, string predicate, params object[] values) { if (source == null) throw new ArgumentNullException("source"); if (predicate == null) throw new ArgumentNullException("predicate"); LambdaExpression lambda = DynamicExpression.ParseLambda(source.ElementType, typeof(bool), predicate, values); return source.Provider.CreateQuery( Expression.Call( typeof(Queryable), "Single", new Type[] { source.ElementType }, source.Expression, Expression.Quote(lambda))); }

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• XCode iPhone Programming: Loading a jpg into a UIImageView from URL

  - by Antonio Murgia

  My app has to load an image from a http server and displaying it into an UIImageView How can i do that?? I tried this: NSString *temp = [NSString alloc]; [temp stringwithString:@"http://192.168.1.2x0/pic/LC.jpg"] temp=[(NSString *)CFURLCreateStringByAddingPercentEscapes( nil, (CFStringRef)temp, NULL, NULL, kCFStringEncodingUTF8) autorelease]; NSData *dato = [NSData alloc]; dato=[NSData dataWithContentsOfURL:[NSURL URLWithString:temp]]; pic = [pic initWithImage:[UIImage imageWithData:dato]]; This code is in viewdidload of the view but nothing is displayed! The server is working because i can load xml files from it. but i can't display that image! I need to load the image programmatically because it has to change depending on the parameter passed! Thank you in advance. Antonio

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• Android:How to display images from the in a ListView?

  - by Maxood

  Android:How to display images from the web in a ListView?I have the following code to display image from a URL in an ImageView: import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; import android.app.ListActivity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.widget.ImageView; public class HttpImgDownload extends ListActivity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Bitmap bitmap = // DownloadImage( // "http://www.streetcar.org/mim/cable/images/cable-01.jpg"); DownloadImage( "http://s.twimg.com/a/1258674567/images/default_profile_3_normal.png"); ImageView img = (ImageView) findViewById(R.id.img); img.setImageBitmap(bitmap); } private InputStream OpenHttpConnection(String urlString) throws IOException { InputStream in = null; int response = -1; URL url = new URL(urlString); URLConnection conn = url.openConnection(); if (!(conn instanceof HttpURLConnection)) throw new IOException("Not an HTTP connection"); try{ HttpURLConnection httpConn = (HttpURLConnection) conn; httpConn.setAllowUserInteraction(false); httpConn.setInstanceFollowRedirects(true); httpConn.setRequestMethod("GET"); httpConn.connect(); response = httpConn.getResponseCode(); if (response == HttpURLConnection.HTTP_OK) { in = httpConn.getInputStream(); } } catch (Exception ex) { throw new IOException("Error connecting"); } return in; } private Bitmap DownloadImage(String URL) { Bitmap bitmap = null; InputStream in = null; try { in = OpenHttpConnection(URL); bitmap = BitmapFactory.decodeStream(in); in.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } return bitmap; } } Now how can i display images in an array in a listview? Here's how i want to display the images: http://sites.google.com/site/androideyecontact/_/rsrc/1238086823282/Home/android-eye-contact-lite/eye_contact-list_view_3.png?height=420&width=279

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• 2 way SSL between SOA and OSB

  - by Johnny Shum

  If you have a need to use 2 way SSL between SOA composite and external partner links, you can follow these steps. Create the identity keystores, trust keystores, and server certificates. Setup keystores and SSL on WebLogic Setup server to use 2 way SSL Configure your SOA composite's partner link to use 2 way SSL Configure SOA engine two ways SSL In this case,  I use SOA and OSB for the test.  I started with a separate OSB and SOA domains.  I deployed two soap based proxies on OSB and two composites on SOA.  In SOA, one composite invokes a OSB proxy service, the other is invoked by the OSB.  Similarly,  in OSB,  one proxy invokes a SOA composite and the other is invoked by SOA. 1. Create the identity keystores, trust keystores and the server certificates Since this is a development environment, I use JDK's keytool to create the stores and use self signing certificate.  For production environment, you should use certificates from a trusted certificate authority like Verisign.    I created a script below to show what is needed in this step.  The only requirement is when creating the SOA identity certificate, you MUST use the alias mykey. STOREPASS=welcome1KEYPASS=welcome1# generate identity keystore for soa and osb.  Note: For SOA, you MUST use alias mykeyecho "creating stores"keytool -genkey -alias mykey -keyalg "RSA" -sigalg "SHA1withRSA" -dname "CN=soa, C=US" -keystore soa-default-keystore.jks -storepass $STOREPASS -keypass $KEYPASS keytool -genkey -alias osbkey -keyalg "RSA" -sigalg "SHA1withRSA" -dname "CN=osb, C=US" -keystore osb-default-keystore.jks -storepass $STOREPASS -keypass $KEYPASS# listing keystore contentsecho "listing stores contents"keytool -list -alias mykey -keystore soa-default-keystore.jks -storepass $STOREPASSkeytool -list -alias osbkey -keystore osb-default-keystore.jks -storepass $STOREPASS# exporting certs from storesecho "export certs from  stores"keytool -exportcert -alias mykey -keystore soa-default-keystore.jks -storepass $STOREPASS -file soacert.derkeytool -exportcert -alias osbkey -keystore osb-default-keystore.jks -storepass $STOREPASS -file osbcert.der # import certs to trust storesecho "import certs"keytool -importcert -alias osbkey -keystore soa-trust-keystore.jks -storepass $STOREPASS -file osbcert.der -keypass $KEYPASSkeytool -importcert -alias mykey -keystore osb-trust-keystore.jks -storepass $STOREPASS -file soacert.der  -keypass $KEYPASS SOA suite uses the JDK's SSL implementation for outbound traffic instead of the WebLogic's implementation.  You will need to import the partner's public cert into the trusted keystore used by SOA.  The default trusted keystore for SOA is DemoTrust.jks and it is located in $MW_HOME/wlserver_10.3/server/lib.   (This is set in the startup script -Djavax.net.ssl.trustStore).   If you use your own trusted keystore, then you will need to import it into your own trusted keystore. keytool -importcert -alias osbkey -keystore $MW_HOME/wlserver_10.3/server/lib/DemoTrust.jks -storepass DemoTrustKeyStorePassPhrase  -file osbcert.der -keypass $KEYPASS If you do not perform this step, you will encounter this exception in runtime when SOA invokes OSB service using 2 way SSL Message send failed: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target  2.  Setup keystores and SSL on WebLogic First, you will need to login to the WebLogic console, navigate to the server's configuration->Keystore's tab.   Change the Keystores type to Custom Identity and Custom Trust and enter the rest of the fields. Then you navigate to the SSL tab, enter the fields in the identity section and expand the Advanced section.  Since I am using self signing cert on my VM enviornment, I disabled Hostname verification.  In real production system, this should not be the case.   I also enabled the option "Use Server Certs", so that the application uses the server cert to initiate https traffic (it is important to enable this in OSB). Last, you enable SSL listening port in the Server's configuration->General tab. 3.  Setup server to use 2 way SSL If you follow the screen shot in previous step, you can see in the Server->Configuration->SSL->Advanced section, there is an option for Two Way Client Cert Behavior,  you should set this to Client Certs Requested and Enforced. Repeat step 2 and 3 done on OSB.  After all these configurations,  you have to restart all the servers. 4.  Configure your SOA composite's partner link to use 2 way SSL You do this by modifying the composite.xml in your project, locate the partner's link reference and add the property oracle.soa.two.way.ssl.enabled.   <reference name="callosb" ui:wsdlLocation="helloword.wsdl">    <interface.wsdl interface="http://www.examples.com/wsdl/HelloService.wsdl#wsdl.interface(Hello_PortType)"/>    <binding.ws port="http://www.examples.com/wsdl/HelloService.wsdl#wsdl.endpoint(Hello_Service/Hello_Port)"                location="helloword.wsdl" soapVersion="1.1">      <property name="weblogic.wsee.wsat.transaction.flowOption"                type="xs:string" many="false">WSDLDriven</property>   <property name="oracle.soa.two.way.ssl.enabled">true</property>    </binding.ws>  </reference> In OSB, you should have checked the HTTPS required flag in the proxy's transport configuration.  After this,  rebuilt the composite jar file and ready to deploy in the EM console later. 5.  Configure SOA engine two ways SSL Oracle SOA Suite uses both Oracle WebLogic Server and Sun Secure Socket Layer (SSL) stacks for two-way SSL configurations. For the inbound web service bindings, Oracle SOA Suite uses the Oracle WebLogic Server infrastructure and, therefore, the Oracle WebLogic Server libraries for SSL.  This is already done by step 2 and 3 in the previous section. For the outbound web service bindings, Oracle SOA Suite uses JRF HttpClient and, therefore, the Sun JDK libraries for SSL.  You do this by configuring the SOA Engine in the Enterprise Manager Console, select soa-infra->SOA Administration->Common Properties Then click at the link at the bottom of the page:  "More SOA Infra Advances Infrastructure Configuration Properties" and then enter the full path of soa identity keystore in the value field of the KeyStoreLocation attribute.  Click Apply and Return then navigate to the domain->security->credential. Here, you provide the password to the keystore.  Note: the alias of the certficate must be mykey as described in step 1, so you only need to provide the password to the identity keystore.   You accomplish this by: Click Create Map In the Map Name field, enter SOA, and click OK Click Create Key Enter the following details where the password is the password for the SOA identity keystore. 6.  Test and Trouble Shooting Once the setup is complete and server restarted, you can deploy the composite in the EM console and test it.  In case of error,  you can read the server log file to determine the cause of the error.  For example, If you have not setup step 5 and test 2 way SSL, you will see this in the log when invoking OSB from BPEL: java.lang.Exception: oracle.sysman.emSDK.webservices.wsdlapi.SoapTestException: oracle.fabric.common.FabricInvocationException: Unable to access the following endpoint(s): https://localhost.localdomain:7002/default/helloword ####<Sep 22, 2012 2:07:37 PM CDT> <Error> <oracle.soa.bpel.engine.ws> <rhel55> <AdminServer> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <BEA1-0AFDAEF20610F8FD89C5> ............ <11d1def534ea1be0:-4034173:139ef56d9f0:-8000-00000000000002ec> <1348340857956> <BEA-000000> <got FabricInvocationException sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target If you have not enable WebLogic SSL to use server certificate in the console and invoke SOA composite from OSB using two ways SSL, you will see this error: ####<Sep 22, 2012 2:07:37 PM CDT> <Warning> <Security> <rhel55> <AdminServer> <[ACTIVE] ExecuteThread: '6' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <11d1def534ea1be0:-51f5c76a:139ef5e1e1a:-8000-00000000000000e2> <1348340857776> <BEA-090485> <CERTIFICATE_UNKNOWN alert was received from localhost.localdomain - 127.0.0.1. The peer has an unspecified issue with the certificate. SSL debug tracing should be enabled on the peer to determine what the issue is.> ####<Sep 22, 2012 2:07:37 PM CDT> <Warning> <Security> <rhel55> <AdminServer> <[ACTIVE] ExecuteThread: '6' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <11d1def534ea1be0:-51f5c76a:139ef5e1e1a:-8000-00000000000000e4> <1348340857786> <BEA-090485> <CERTIFICATE_UNKNOWN alert was received from localhost.localdomain - 127.0.0.1. The peer has an unspecified issue with the certificate. SSL debug tracing should be enabled on the peer to determine what the issue is.> ####<Sep 22, 2012 2:27:21 PM CDT> <Warning> <Security> <rhel55> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <11d1def534ea1be0:-51f5c76a:139ef5e1e1a:-8000-0000000000000124> <1348342041926> <BEA-090497> <HANDSHAKE_FAILURE alert received from localhost - 127.0.0.1. Check both sides of the SSL configuration for mismatches in supported ciphers, supported protocol versions, trusted CAs, and hostname verification settings.> References http://docs.oracle.com/cd/E23943_01/admin.1111/e10226/soacompapp_secure.htm#CHDCFABB   Section 5.6.4 http://docs.oracle.com/cd/E23943_01/web.1111/e13707/ssl.htm#i1200848

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• Datatemplates while using theme does not work - WPF

  - by bobjink

  I am using the theme DarkExpression from WPF Futures. It does not seem to work well with datatemplates. Scenario 1: Here is how it looks like without datatemplates: Pic 1 Code: <ListView Name="playlistListView" ItemsSource="{Binding PlaylistList}" Margin="0" SelectionChanged="DatabindedPlaylistListView_SelectionChanged" Background="{x:Null}" Opacity="0.98"> <ListView.View> <GridView> <GridViewColumn Width="Auto" DisplayMemberBinding="{Binding Name}"> <GridViewColumnHeader HorizontalContentAlignment="Left" Content="Playlist" Tag="Playlist"/> </GridViewColumn> </GridView> </ListView.View> </ListView> Scenario 2: Here is how it looks like trying to use datatemplates while using the theme: Pic 2 Code: <ListView Name="playlistListView" ItemsSource="{Binding PlaylistList}" Margin="0" SelectionChanged="DatabindedPlaylistListView_SelectionChanged" Background="{x:Null}" Opacity="0.98"> <ListView.ItemTemplate> <DataTemplate> <Grid> <UserControls:SongDataTemplate Margin="4" /> </Grid> </DataTemplate> </ListView.ItemTemplate> </ListView> Scenario 3: Here is how it looks like trying to use datatemplates while overriding the theme: Pic3 Code: <UserControl.Resources> <Style x:Key="ListViewItemStretch" TargetType="{x:Type ListViewItem}"> <Setter Property="HorizontalContentAlignment" Value="Stretch"/> <Setter Property="Background" Value="Transparent" /> </Style> </UserControl.Resources> <Grid x:Name="LayoutRoot"> <ListView Name="playlistListView" ItemContainerStyle="{StaticResource ListViewItemStretch}" ItemsSource="{Binding PlaylistList}" Margin="0" SelectionChanged="DatabindedPlaylistListView_SelectionChanged" Background="{x:Null}" Opacity="0.98"> <ListView.ItemTemplate> <DataTemplate> <Grid> <UserControls:SongDataTemplate Margin="4" /> </Grid> </DataTemplate> </ListView.ItemTemplate> </ListView> I want to keep the theme style but I also want to use datatemplates to define how a playlist should look like. Any suggestions? Note: In scenario 2 and 3 I had to remove <ListView.View> <GridView> <GridViewColumn Width="Auto" DisplayMemberBinding="{Binding Name}"> <GridViewColumnHeader HorizontalContentAlignment="Left" Content="Playlist" Tag="Playlist"/> </GridViewColumn> </GridView> </ListView.View> Before the datatemplate would be used.

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• NInject and thread-safety

  - by cbp

  I am having problems with the following class in a multi-threaded environment: public class Foo { [Inject] public IBar InjectedBar { get; set; } public bool NonInjectedProp { get; set; } public void DoSomething() { /* The following line is causing a null-reference exception */ InjectedBar.DoSomething(); } public Foo(bool nonInjectedProp) { /* This line should inject the InjectedBar property */ KernelContainer.Inject(this); NonInjectedProp = nonInjectedProp; } } This is a legacy class which is why I am using property rather than constructor injection. Sometime when the DoSomething() is called the InjectedBar property is null. In a single-threaded application, everything runs fine. How can this be occuring and how can I prevent it?

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