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• How to tell if any entities in context are dirty with .Net Entity Framework 4.0

  - by Mike Gates

  I want to be able to tell if there is any unsaved data in an entity framework context. I have figured out how to use the ObjectStateManager to check the states of existing entities, but there are two issues I have with this. I would prefer a single function to call to see if any entities are unsaved instead of looping though all entities in the context. I can't figure out how to detect entities I have added. This suggests to me that I do not fully understand how the entity context works. For example, if I have the ObjectSet myContext.Employees, and I add a new employee to this set (with .AddObject), I do not see the new entity when I look at the ObjectSet and I also don't see the .Count increase. However, when I do a context.SaveChanges(), my new entity is persisted...huh? I have been unable to find an answer to this in my msdn searches, so I was hoping someone here would be able to clue me in. Thanks in advance.

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• Strcpy() corrupts the copied string in Solaris but not Linux

  - by strictlyrude27

  Hi all, I'm writing a C code for a class. This class requires that our code compile and run on the school server, which is a sparc solaris machine. I'm running Linux x64. I have this line to parse (THIS IS NOT ACTUAL CODE BUT IS INPUT TO MY PROGRAM): while ( cond1 ){ I need to capture the "while" and the "cond1" into separate strings. I've been using strtok() to do this. In Linux, the following lines: char *cond = NULL; cond = (char *)malloc(sizeof(char)); memset(cond, 0, sizeof(char)); strcpy(cond, strtok(NULL, ": \t\(){")); //already got the "while" out of the line will correctly capture the string "cond1".Running this on the solaris machine, however, gives me the string "cone1". Note that in plenty of other cases within my program, strings are being copied correctly. (For instance, the "while") was captured correctly. Does anyone know what is going on here?

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• JSF 2 Scriptmanager style functionality

  - by CDSO1

  I need to be able to add some javascript to all ajax postback responses (PartialViewContext.isAjaxRequest == true) but I am not succeeding with any implementation I try. I have tried implementing a PhaseListener and adding my script using PartialResponseWriter.insert* to add eval blocks, as well as trying to add the script by creating a script element. (Results in CDATA cannot nest, or just invalid XML) I have tried decorating PartialViewContextFactory to override the PartialViewContext.processPartial and add the script after the wrapped instance has processed it... How should I go about adding sripts to an Ajax response? Something similar to what .NET has with Scriptmanager.registerClientScriptBlock preferably. Thank you

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• Testing complex entities

  - by Carlos

  I've got a C# form, with various controls on it. The form controls an ongoing process, and there are many, many aspects that need to be right for the program to run correctly. Each part can be unit tested (for instance, loading some coefficients, drawing some diagnostics) but I often run into problems that are best described with an example: "If I click here, then here, then change this, then re-open the form, then click here, it crashes or produces an error" I've tried my best to use common code organisational ideas (inheritance, DRY, separation of concerns) but there never seems to be a way to test every single path, and inevitably, a form with several controls will have a huge number of ways to execute. What can I read (preferably online) that addresses this kind of issue, and is there a (non-generic) term for it. This isn't a specific problem I'm having, but one that creeps up on me, especially with WinForms.

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• VB.NET ASP.NET Web Application woes (VS 2008)

  - by typoknig

  Hi all, I am making my first web application with ASP.NET and I am having a rough time. I have previously created the application I am working on as a Windows Form application and it works great, but I am having problems with the HTML side of things in the web application. My issues are pretty minor, but very annoying. I have worked with websites before and CSS, but as far as I can tell I do not have direct access to a CSS when creating a web application in VS 2008. My biggest issue is the positioning of components that I have dragged onto the "Default.aspx" form. For instance, how am I supposed to float a panel next to another one if I don't have a CSS, or how am I to correctly position a label?

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• Android ksoap nested soap objects in request gives error in response

  - by Smalesy

  I'm trying to do the following soap request on Android using KSOAP. It contains a list of nested soap objects. However, I must be doing something wrong as I get an error back. The request I am trying to generate is as follows: <?xml version="1.0" encoding="utf-8"?> <soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"> <soap12:Body> <SetAttendanceMarks xmlns="http://hostname.net/"> <strSessionToken>string</strSessionToken> <LessonMarks> <Count>int</Count> <LessonMarks> <LessonMark> <StudentId>int</StudentId> <EventInstanceId>int</EventInstanceId> <Mark>string</Mark> </LessonMark> <LessonMark> <StudentId>int</StudentId> <EventInstanceId>int</EventInstanceId> <Mark>string</Mark> </LessonMark> </LessonMarks> </LessonMarks> </SetAttendanceMarks> </soap12:Body> </soap12:Envelope> My code is as follows: public boolean setAttendanceMarks(List<Mark> list) throws Exception { boolean result = false; String methodName = "SetAttendanceMarks"; String soapAction = getHost() + "SetAttendanceMarks"; SoapObject lessMarksN = new SoapObject(getHost(), "LessonMarks"); for (Mark m : list) { PropertyInfo smProp =new PropertyInfo(); smProp.setName("LessonMark"); smProp.setValue(m); smProp.setType(Mark.class); lessMarksN.addProperty(smProp); } PropertyInfo cProp =new PropertyInfo(); cProp.setName("Count"); cProp.setValue(list.size()); cProp.setType(Integer.class); SoapObject lessMarks = new SoapObject(getHost(), "LessonMarks"); lessMarks.addProperty(cProp); lessMarks.addSoapObject(lessMarksN); PropertyInfo sProp =new PropertyInfo(); sProp.setName("strSessionToken"); sProp.setValue(mSession); sProp.setType(String.class); SoapObject request = new SoapObject(getHost(), methodName); request.addProperty(sProp); request.addSoapObject(lessMarks); SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12); envelope.dotNet = true; envelope.setOutputSoapObject(request); HttpTransportSE androidHttpTransport = new HttpTransportSE(getURL()); androidHttpTransport.debug = true; androidHttpTransport.call(soapAction, envelope); String a = androidHttpTransport.requestDump; String b = androidHttpTransport.responseDump; SoapObject resultsRequestSOAP = (SoapObject) envelope.bodyIn; SoapObject res = (SoapObject) resultsRequestSOAP.getProperty(0); String resultStr = res.getPropertyAsString("Result"); if (resultStr.contentEquals("OK")) { result = true; } return result; } The error I get is as follows: <?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <soap:Body> <soap:Fault> <soap:Code> <soap:Value>soap:Sender</soap:Value> </soap:Code> <soap:Reason> <soap:Text xml:lang="en">Server was unable to read request. ---&gt; There is an error in XML document (1, 383). ---&gt; The specified type was not recognized: name='LessonMarks', namespace='http://gsdregapp.net/', at &lt;LessonMarks xmlns='http://gsdregapp.net/'&gt;.</soap:Text> </soap:Reason> <soap:Detail /> </soap:Fault> </soap:Body> </soap:Envelope> Can anybody tell me what I am doing wrong? I will be most grateful for any assistance!

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• Grails pattern to reuse template on error

  - by bsreekanth

  Hello, I have a gsp template, where the data for create view is passed through the controller. def create = { def bookInstance = new Book() bookInstance .properties = params def map = getDefaultValues() render(template: "create", model: [bookInstance : bookInstance , title: map.title, somelist: somelist ....]) the gsp template <g:select optionKey="id" from="${somelist}" name="somelist.id" value="${bookInstance ?.somelist?.id}" noSelection="['null': '']"></g:select> now, in the save method, if there is an error, it returns currently populated and validated instance (default scaffold implementation) render(template: "create", model: [bookInstance : bookInstance ]) But the fields in the gsp (error page rendered from save action) is empty. I could see the reason as it looks the value in "${somelist}" , but it is not used in save method. Do i just need to check for null in the gsp and use whichever map is available, or any better method (passing all the map in the save method is not an option) .. thanks in advance..

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• C++: building iterator from bits

  - by gruszczy

  I have a bitmap and would like to return an iterator of positions of set bits. Right now I just walk the whole bitmap and if bit is set, then I provide next position. I believe this could be done more effectively: for example build statically array for each combination of bits in single byte and return vector of positions. This can't be done for a whole int, because array would be too big. But maybe there are some better solutions? Do you know any smart algorithms for this?

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• Embedding a YouTube Video Based on a PHP Variable

  - by jeffpm

  I have a website that I am creating for a class project. The website shows information about bands (which is stored in a mysql database). I am trying to spruce up the site a bit, and I would like to embed a YouTube video based on the band's name. Say, for instance, I have "Led Zeppelin" stored in my database. How can I take a PHP variable containing "Led Zeppelin", search YouTube using that variable, find a random video, and then embed that in the website? From the research I've done, it seems you can only embed YouTube videos if you know the exact address of the video. Thanks!

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• Microsoft Mdac with SQL Server issue

  - by George2

  Hello everyone, I am new to Microsoft Mdac = http://connect.microsoft.com/VisualStudio/feedback/details/91083/mdac-2-8-for-windows-x64, and I want to use this technology to export data from a SQL Server table (or ADO.Net DataTable object instance) to an Excel file. I am using VSTS 2008 + .Net 2.0 + C# + Windows Server 2008 x64 + SQL Server 2008 Enterprise 64-bit + ADO.Net + ASP.Net + IIS 7.0. My questions, whether Mdac technology could achieve my goal? any tutorial about this area (export from SQL Server to excel using Mdac) for a newbie with samples? thanks in advance, George

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• Process-wide hook using SetWindowsHookEx

  - by mfya

  I need to inject a dll into one or more external processes, from which I also want to intercept keybord events. That's why using SetWindowsHookEx with WH_KEYBOARD looks like an easy way to achieve both things in a single step. Now I really don't want to install a global hook when I'm only interested in a few selected processes, but Windows hooks seem to be either global or thread-only. My question is now how I would properly go about setting up a process-wide hook. I guess one way would be to set up the hook on the target process' main thread from my application, and then doing the same from inside my dll on DLL_PROCESS_ATTACH for all other running threads (plus on DLL_THREAD_ATTACH for threads started later). But is this really a good way? And more important, aren't there any simpler ways to setup process-wide hooks? My idea looks quite cumbersome und ugly, but I wasn't able to find any information about doing this anywhere.

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• SSAS 2008/Excel 2007 - Can't see cube

  - by Brian

  I have created a cube in SSAS 2008. In BIDS and SSMS I can see it fine. However, I cannot connect through Excel. I have tried both Excel 2003 and Excel 2007. I must support both and neither work. I can see the database but the cubes do not show up. I created a dummy cube in the project using the wizard and deployed that to the same database. In Excel 2003, I can see and connect to the dummy cube. Excel 2007 can't even find the server/instance after adding this cube. I have used another computer and received the same results with Excel 2003. Does anyone have any suggestions? Thanks for any help you can give me. -Brian

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• PDO update with conditional?

  - by dmontain

  I have a PDO mysql that updates 3 fields. $update = $mypdo->prepare("UPDATE tablename SET field1=:field1, field2=:field2, field3=:field3 WHERE key=:key"); But I want field3 to be updated only when $update3 = true; Is this possible to accomplish with a single query? I could do it with 2 queries where I update field1 and field2 then check the boolean and update field3 if needed in a separate query. But hopefully there is a way to accomplish this in 1 query?

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• Converting rich text that contains backslashes to plain text or html

  - by Allison

  I am trying to convert a rich text string to plain text or html. I am currently using the RichTextBox.Text feature which works correctly for almost all cases except when the text contains backslashes then some of the text is stripped out as the converter believes that it is part of the rtf formatting. Does anyone have any ideas of how to get the backslashes to stay in that instance. Here is an example of a string I would have {\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset0 Arial;}}\viewkind4\uc1\pard\fs17 Testing Export \with comments\par} The text I would need would be "Testing Export \with comments" and the text I am getting back from the rtf converter is "Testing Export comments". Any help would be greatly appreciated. Please respond if you have further questions.

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• FCKeditor in jQuery ui dialog not working

  - by zilverdistel

  Hi folks, I'm having serious trouble getting this to work in IE7/8. In FF, everything works as expected. When the user clicks on a certain link, a modal dialog popup is shown. In this dialog, there is a form, which contains one textarea, that is replaced with a FCK instance. The form is loaded from the server using ajax on the clientside and php on the serverside. There's one strange way to get the FCK editor shown, and that is by resizing the dialog. Library versions: jquery: 1.3.2 jquery ui: 1.7.3 FCKeditor: 2.6.1 build 19297 Any help would be strongly appreciated, I'm on a deadline here :-(

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• Will more CPUs/cores help with VS.NET build times?

  - by LoveMeSomeCode

  I was wondering if anyone knew whether Visual Studio .NET had a parallel build process or not? I have a solution with lots of projects, every project has lots of markup/code, lots of types, etc. Just sitting there with intellisense on runs it up to about 700MB. But the build times are really slow and only seem to max out one of my two cpu cores. Does this mean the build process is single threaded? My solution's build dependency chain isn't linear, so I don't see why it couldn't be building some of the projects in parallel. I remember Joel Spolsky blogging about his new SSD, and how it didn't help with compile times, but he didn't mention which compiler he was using. We're using VS 2005. Anyone know how it's compilation works? And is it any different/better in 2008/2010?

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• Simplest solution to replace a tiny file inside an MSI?

  - by sascha

  Many of our customers have access to InstallShield, WISE or AdminStudio. These aren't a problem. I'm hoping there is some way I can provide our smaller customers without access to commercial repackaging tools a freely available set of tools and steps to do the file replacement themselves. Only need to replace a single configuration file inside a compressed MSI, the target user can be assumed to already have Orca installed, know how to use this to customize the Property table (to embed license details for GPO deployment) and have generated an MST file. Disclaimer: this is very similar to another question but both questions and answers in that thread are not clear.

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• c# Generic List

  - by user177883

  I m populating data for different entities into set of lists using generic lists as follows : List<Foo> foos .. List<Bar> bars .. I need to write these lists to a file, i do have a util method to get the values of properties etc. using reflection. What i want to do is: using a single method to write these into files such as: void writeToFile(a generic list) { //Which i will write to file here. } How can i do this? I want to be able to call : writeToFile(bars); writeToFile(foos);

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• How to post Arabic characters in PHP

  - by Peter Stuart

  Okay, So I am writing an OpenCart extension that must allow Arabic characters when posting data. Whenever I post ????? the print_r($_POST) returns with this: u0645u0631u062du0628u0627 I check the HTML header and it has this: <meta charset="UTF-8" /> I checked the PHP file that triggers all SQL queries and it has this code: mysql_query("SET NAMES 'utf8'", $this->link); mysql_query("SET CHARACTER SET utf8", $this->link); mysql_query("SET CHARACTER_SET_CONNECTION=utf8", $this->link); This is in my form tag: <form action="<?php echo $action; ?>" method="post" enctype="multipart/form-data" id="form" accept-charset="utf-8"> I can't think of what else I am doing wrong. The rest of the OpenCart framework supports UTF8 and arabic characters. It is just in this instance where I can't post anything arabic? Could someone please help me? Many Thanks Peter

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• How read value from XmlNode

  - by klerik123456

  I have a Xml file and I try to read value from node Ticket, but my output is still empty. Can somebody help me ? Xml docmunet : <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <soap:Header> <TicketHeader xmlns="http://tempuri.org/"> <Ticket> heslo </Ticket> </TicketHeader> </soap:Header> <soap:Body> <test xmlns="http://tempuri.org/"/> </soap:Body> </soap:Envelope> My code : doc= new XmlDocument(); doc.Load(path); XmlNode temp = doc.SelectSingleNode("//Ticket"); textBox3.Text=temp.InnerXml;

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• What can explain std::cout not to display anything ?

  - by Benoît

  For whatever reason, std::cout does not display anything with my application. The description of my development environment follows. I am working on a Qt application using Qt Creator. Since Qt Creator can't be launched from my station (XP64), i am currently developping it with Visual Studio 2008 and the Qt plugin (by importing the .pro project file). Everything seems fine and the application works. In some cases (depending on command line arguments), i don't want to launch the HIM, just to display a few sentences in the CLI (command line required arguments, for instance). I don't get any error, but nothing is displayed. The corresponding code, which i am sure is run is the (classical) following : std::cout << "is this going to be displayed ?" << std::endl; Do you have any idea why nothing is displayed ?

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• Numeric comparison difficulty in R

  - by Matt Parker

  I'm trying to compare two numbers in R as a part of a if-statement condition: (a-b) >= 0.5 In this particular instance, a = 0.58 and b = 0.08... and yet (a-b) >= 0.5 is false. I'm aware of the dangers of using == for exact number comparisons, and this seems related: (a - b) == 0.5) is false, while all.equal((a - b), 0.5) is true. The only solution I can think of is to have two conditions: (a-b) > 0.5 | all.equal((a-b), 0.5). This works, but is that really the only solution? Should I just swear off of the = family of comparison operators forever?

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• Do i *have* to use ObservableCollection in Silverlight WCF client?

  - by Simon_Weaver

  When accessing Silverlight in WCF you get proxies generated with ObservableCollection Thats fine when you're databinding, but a little clumsy when you're just calling a method. For instance the following service method : [OperationContract] public SearchOrdersMsgOut SearchOrders(ShippingStatusType[] shippingStatuses, string[] orderId) { } gets generated with ObservableCollection. What! They're just parameters. Why would I ever want to 'observe' them? I'm fine if I have to do this - but it seems like there should be a way to force simple array structures when I know I'm never databinding - especially on input messages. I'd much rather do this : searchCriteria.PaymentStatus = new [] { PaymentStatusType.PaymentFailed, PaymentStatusType.Unpaid }; than this : searchCriteria.PaymentStatus = new ObservableCollection<PaymentStatusType> { PaymentStatusType.PaymentFailed, PaymentStatusType.Unpaid }; Is there a way? PS. I do actually use a SearchCriteria object for my search criteria - but I simplified for this example wondering if parameters were handled differently.

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• Identifying NHibernate proxy classes

  - by Marc Gravell

  I'm not an NHibernate user; I write a serialization utility library. A user has logged a feature-request that I should handle NHibernate proxy classes, treating them the same as the actual type. At the moment my code is treating them as unexpected inheritance, and throwing an exception. The code won't know in advance about NHibernate (including no reference, but I'm not aftaid of reflection ;-p) Is there a robust / guaranteed way of detecting such proxy types? Apparently DataContractSerializer handles this fine, so I'm hoping it is something pretty simple. Perhaps some interface or [attribute] decoration. Also, during deserialization; at the moment I would be creating the original type (not the NHibernate type). Is this fine for persistence purposes? Or is the proxy type required? If the latter; what is required to create an instance of the proxy type?

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• LINQ method chaining and granular error handling

  - by Clafou

  I have a method which can be written pretty neatly through method chaining: return viewer.ServerReport.GetParameters() .Single(p => p.Name == Convention.Ssrs.RegionParamName) .ValidValues .Select(v => v.Value); However I'd like to be able to do some checks at each point as I wish to provide helpful diagnostics information if any of the chained methods returns unexpected results. To achieve this, I need to break up all my chaining and follow each call with an if block. It makes the code a lot less readable. Ideally I'd like to be able to weave in some chained method calls which would allow me to handle unexpected outcomes at each point (e.g. throw a meaningful exception such as new ConventionException("The report contains no parameter") if the first method returns an empty collection). Can anyone suggest a simple way to achieve such a thing?

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