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  • How to correctly open WCF service

    - by Sergej Andrejev
    Hi there, I'm using WCF client like this... var client = new TestClient(); try { response = service.Operation(request); } finally { try { if (client.State != CommunicationState.Faulted) client.Close(); } catch (Exception) { client.Abort(); } } but from time to time I get 500 HTTP error which is the only answer I get for next 15 minutes, then everything is back to normal for 15 minutes and so on. I know there is some load balancing stuff going on service side but guys there can't find any problems with it. That's why I started wondering am I using WCF service correctly. I already made a mistake once when I was using "using" to close service connection and I'm afraid I doing something wrong again. So can anybody say whether my way of calling WCF service is correct or not in all (event the most rare) circumstances?

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  • Design support for templated UserControl

    - by SaphuA
    Hello, I have created a real simple templated UserControl using the following tutorial: http://msdn.microsoft.com/en-us/library/36574bf6(VS.80).aspx I can now add this control to my mvc 2.0 application using: <components:Box BoxType="Help" Title="Content Title" runat="server"> <Content> <%: Html.TextBox("test") %> This is my awesome content!<br /> <b>Test</b> </Content> </components:Box> However, when I go to the designer, I get an exception: Type 'System.Web.UI.UserControl' does not have a public property named 'Content'. How can I fix this? I don't even need to use the drag-and-drop designer, just rendering the control will do fine. Thanks!

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  • Hitting a memory limit slows down the .Net application

    - by derdo
    We have a 64bit C#/.Net3.0 application that runs on a 64bit Windows server. From time to time the app can use large amount of memory which is available. In some instances the application stops allocating additional memory and slows down significantly (500+ times slower).When I check the memory from the task manager the amount of the memory used barely changes. The application keeps on running very slowly and never gives an out of memory exception. Any ideas? Let me know if more data is needed.

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  • How to capture a screen shot in .NET from a webapplication?

    - by CodeToGlory
    In Java we can do it as follows: import java.awt.Dimension; import java.awt.Rectangle; import java.awt.Robot; import java.awt.Toolkit; import java.awt.image.BufferedImage; import javax.imageio.ImageIO; import java.io.File; ... public void captureScreen(String fileName) throws Exception { Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); Rectangle screenRectangle = new Rectangle(screenSize); Robot robot = new Robot(); BufferedImage image = robot.createScreenCapture(screenRectangle); ImageIO.write(image, "png", new File(fileName)); } ... How do we do this in .NET from a webapplication? Capturing the client's screen and sending it to the server all from within the application.

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  • Changing a limited user account in XP fails

    - by javamonkey79
    I have the following: using System; using System.DirectoryServices.AccountManagement; public class ChangePassword { public static void Main() { PrincipalContext context = new PrincipalContext(ContextType.Machine); UserPrincipal user = UserPrincipal.FindByIdentity(context, "someLimitedAccount"); user.ChangePassword( "xxx", "zzz" ); } } This works just fine with administrator accounts, but seems to crash like so when I try to change limited accounts in XP: Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object. at ChangePassword.Main() Is what I am trying to do possible? If so, how? EDIT #1: I added the following: Console.WriteLine( "user: " + user ); Below this line: UserPrincipal user = UserPrincipal.FindByIdentity(context, "someLimitedAccount"); And I get this: user: It doesn't look like user is null when I print it, but then again I'm not really a .Net guy - I seem to remember this being expected behavior.

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  • Spring Transaction Manager

    - by cedric
    Hi. I have a j2ee application running on spring framework. I am implementing a transaction manager with AOP. It works fine. When an exception occurs in my method it is detected by my AOP configuration and rolls back the changes in the DB. But the problem is the code where you expect the error should not be surrounded with try-catch. When I suround it with try-catch it won't roll-back. But I need to do some stuffs like logging whenever there are errors and the only place I can think of placing it is in the catch block.

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  • How to maintain unique login in windows form application?

    - by Vivek
    Hello All, I am developing a winform application in which user's login is validated through ms sql server 2000 database.When user entry its user name and password, application checks its exists in user table or not. Now my requirement is if a user already login through one system it should not log in through another system. if solution like make entry in database about status of user like on successful log in mark user status is true and on closing application mark false , then in the case of network or hardware failure or system exception. so, please suggest me a optimal solution .

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  • NSEntityDescription entityForName returning nil

    - by Kamchatka
    Hi, I did some changes to my model (but I don't want migration yet, so I just remove the application, built clean etc.) so my application works in the simulator. However, when I run it on the iPhone, I get the following error: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'executeFetchRequest:error: A fetch request must have an entity.' I set the entity like this: NSEntityDescription *entity = [NSEntityDescription entityForName:@"Document" inManagedObjectContext:managedObjectContext]; My managedObjectContext is not nil. But I suspect that it doesn't load the object model correctly or something similar because If I display the entities in the model, the list is empty. How can I make sure the model is loaded? Thanks,

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  • Need help configuring SQL Server CE connections string in Fluent NHibernate

    - by Yoav
    Hi, I'm trying to return a session factory using this code: return Fluently.Configure() .Database(MsSqlCeConfiguration.Standard.ShowSql().ConnectionString(path)) .Mappings(m => m.FluentMappings.AddFromAssemblyOf<Project>()) .BuildSessionFactory(); Path is the full path to an .sdf file. And get this exception: System.ArgumentException: Format of the initialization string does not conform to specification starting at index 0. at System.Data.SqlServerCe.ConStringUtil.GetKeyValuePair(Char[] connectionString, Int32 currentPosition, String& key, Char[] valuebuf, Int32& vallength, Boolean& isempty) What am I doing wrong?

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  • Does MOSS 2007 workflows support calling external mehods ?

    - by Mina Samy
    Hi all I have a custom sharepoint workflow that I need to call an external method defined in a local service it always throws an exception System.InvalidOperationException: Could not find service of type 'ListItemCheckService.IListItemCheck' through the currently configured services. Consider adding the service to ExternalDataExchangeService. at System.Workflow.Activities.CallExternalMethodActivity.Execute(ActivityExecutionContext executionContext) at System.Workflow.ComponentModel.ActivityExecutor`1.Execute(T activity, ActivityExecutionContext executionContext) at System.Workflow.ComponentModel.ActivityExecutor`1.Execute(Activity activity, ActivityExecutionContext executionContext) at System.Workflow.ComponentModel.ActivityExecutorOperation.Run(IWorkflowCoreRuntime workflowCoreRuntime) at System.Workflow.Runtime.Scheduler.Run() the question is does the sharepoint workflow system support calling external methods from a local service ? thanks

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  • Copying a java text file into a String.

    - by Deepak Konidena
    Hi, I run into the following errors when i try to store a large file into a string. Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:515) at java.lang.StringBuffer.append(StringBuffer.java:306) at rdr2str.ReaderToString.main(ReaderToString.java:52) As is evident, i am running out of heap space. Basically my pgm looks like something like this. FileReader fr = new FileReader(<filepath>); sb = new StringBuffer(); char[] b = new char[BLKSIZ]; while ((n = fr.read(b)) > 0) sb.append(b, 0, n); fileString = sb.toString(); Can someone suggest me why i am running into heap space error? Thanks.

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  • Struts2 JPA Validation error how to forward to action and not lose ActionErrors messages ?

    - by Sebastien Dionne
    I'm using Hibernate validator 4.1 to validate my entity. I have a dashboard that I can access from the action : viewDashboard. In my action, I load 2 List in my acion like this. public String execute() throws Exception { listDocteur = service.listDocteur(); listUser = service.listUser(); return SUCCESS; } In the DashBoard, I have a submit that can add a User. <action name="saveUser" class="com.test.action.CreateUserAction" method="execute" <interceptor-ref name="mybasicStackWithValidation" </interceptor-ref <result name="input"/WEB-INF/jsp/viewDashboard.jsp</result <result name="success" type="redirectAction"viewDashboard</result </action if I submit invalid value, I'll see the error messages, but I'll lose my 2 Lists. If I have a type="redirectAction".. I lose the error messages. in Struts 1, I would forward to the action viewDashboard.do without a redirect and that will works.. but How to do that in Struts2 ?

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  • Marshal managed string[] to unmanaged char**

    - by Vince
    This is my c++ struct (Use Multi-Byte Character Set) typedef struct hookCONFIG { int threadId; HWND destination; const char** gameApps; const char** profilePaths; } HOOKCONFIG; And .Net struct [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public struct HOOKCONFIG { public int threadId; public IntPtr destination; // MarshalAs? public string[] gameApps; // MarshalAs? public string[] profilePaths; } I got some problem that how do I marshal the string array? When I access the struct variable "profilePaths" in C++ I got an error like this: An unhandled exception of type 'System.AccessViolationException' occurred in App.exe Additional information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. MessageBox(0, cfg.profilePaths[0], "Title", MB_OK); // error ... Orz

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  • How to invoke a delegate with a null parameter?

    - by Rodney Burton
    I get a null exception if I try to pass a null parameter to a delegate during an invoke. Here's what the code looks like: public void RequestPhoto() { WCF.Service.BeginGetUserPhoto(Contact.UserID, new AsyncCallback(RequestPhotoCB), null); } public void RequestPhotoCB(IAsyncResult result) { var photo = WCF.Service.EndGetUserPhoto(result); UpdatePhoto(photo); } public delegate void UpdatePhotoDelegate(Binary photo); public void UpdatePhoto(Binary photo) { if (InvokeRequired) { var d = new UpdatePhotoDelegate(UpdatePhoto); Invoke(d, new object[] { photo }); } else { var ms = new MemoryStream(photo.ToArray()); var bmp = new Bitmap(ms); pbPhoto.BackgroundImage = bmp; } } The problem is with the line: Invoke(d, new object[] { photo }); If the variable "photo" is null. What is the correct way to pass a null parameter during an invoke? Thanks!

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  • java - POST vs JDBC

    - by Dan
    OK so here's the code: import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.URL; public class Main { public static void main(String[] args) { try { URL my_url = new URL("http://www.viralpatel.net/blogs/"); BufferedReader br = new BufferedReader(new InputStreamReader(my_url.openStream())); String strTemp = ""; while(null != (strTemp = br.readLine())){ System.out.println(strTemp); } } catch (Exception ex) { ex.printStackTrace(); } } } Using this method I can use POST and GET methods using PHP scripts. I can then use the PHP scripts to the MySQL database which in turn outputs back to the java applet. Is this possible? (and safer?) Thanks.

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  • Timespan not accepting day in MVC3

    - by middelpat
    I have a MVC3 application in which i want to set a timespan to for example 2 days and 5 hours. when i enter 02:05:00:00 it gives me the following exception: System.OverflowException: SqlDbType.Time overflow. Value '2.05:00:00' is out of range. Must be between 00:00:00.0000000 and 23:59:59.9999999. When i enter 05:00:00 it correctly saves 5 hours into the database. according to MSDN timespan has a property for days. How do i correctly set the days? Model: public class ProductionTimeVM { [Required] public TimeSpan DefaultTime { get; set; } } In my view i just use: @Html.TextBoxFor(x => x.DefaultTime) For my controller: public ActionResult SaveProductionTime(ProductionTimeVM vm) { ProductionTime productionTime = new ProductionTime(); productionTime.Default = vm.DefaultTime; //some more code } Any idea's?

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  • Weird cabal error: "inappropriate type"

    - by Bill
    ~ % cabal install --reinstall time Resolving dependencies... [1 of 1] Compiling Main ( /var/folders/0D/0D3du+YyGzuRETgUJZ5m8U+++TI/-Tmp-/time-1.2.0.251774/time-1.2.0.2/Setup.hs, /var/folders/0D/0D3du+YyGzuRETgUJZ5m8U+++TI/-Tmp-/time-1.2.0.251774/time-1.2.0.2/dist/setup/Main.o ) Linking /var/folders/0D/0D3du+YyGzuRETgUJZ5m8U+++TI/-Tmp-/time-1.2.0.251774/time-1.2.0.2/dist/setup/setup ... Configuring time-1.2.0.2... setup: dist/setup-config51799.tmp: inappropriate type cabal: Error: some packages failed to install: time-1.2.0.2 failed during the configure step. The exception was: ExitFailure 1 ~ % Has anyone seen this before?

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  • XmlDocument.InnerXml is null, but InnerText is not

    - by Adam Neal
    I'm using XmlDocument and XmlElement to build a simple (but large) XML document that looks something like: <Widgets> <Widget> <Stuff>foo</Stuff> <MoreStuff>bar</MoreStuff>...lots more child nodes </Widget> <Widget>...lots more Widget nodes </Widgets> My problem is that when I'm done building the XML, the XmlDocument.InnerXml is null, but the InnerText still shows all the text of all the child nodes. Has anyone ever seen a problem like this before? What kind of input data would cause these symptoms? I expected the XmlDocument to just throw an exception if it was given bad data. Note: I'm pretty sure this is related to the input data as I can only reproduce it against certain data sets. I also tried escaping the data with SecurityElement.Escape but it made no difference.

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  • How to rebind another UDP socket port properly?

    - by Jollian
    When my client application launchs, it binds the UDP port like this: this.BindPort(5001); The BindPort method implement blow: public void BindPort(int port) { m_listener = new Socket( AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp ); IPEndPoint Point = new IPEndPoint( IPAddress.Any, Port ); m_listener.Bind( port); m_listener.BeginReceive( buff, 0, buff.Length, SocketFlags.None, new AsyncCallback( DataReceived ), buff ); } And when my server application commands client to bind to another UDP port(e.g. 5005). I call the same BindPort method in client. Then a exception occurs at DataReceived method. I think there must be a problem that I don't close the UDP port properly. But how can i close the UDP socket properly and rebind to another one. Thanks.

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  • how can i get proper Uri of a particular contact in android 2.1

    - by Rishabh
    I have written an application and added 2 contacts on emulator, but i am not able to update their names on android 2.1, code is working on android 1.6 platform with the following code. ContentValues contactValues = new ContentValues(); contactValues.put(Contacts.People.NAME, firstName+" "+lastName); getContentResolver().update(UpdateContactUri, contactValues, null, null); In android 1.6 i am getting Uri for those two contacts are "content:// contacts/people/1" and "content://contacts/people/2". but in 2.1 I am getting these values are "content://contacts/people/8" and "content://contacts/people/9" and while updating its giving "java.IllegalArgumentException, Empty values" exception. When i tried to put a static Uri like "content://contacts/people/1", code was debugged sucessfully but contact was not updated. How can i resolve it, why i am not getting uri like 1.6 platform ? Thanks in advance...

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  • BasedOn property not working with ListView

    - by bobjink
    When I use the following code it works because I am using a ListBox <UserControl.Resources> <Style BasedOn="{StaticResource {x:Type ListBox}}" TargetType="{x:Type ListBox}"> <Setter Property="HorizontalContentAlignment" Value="Stretch"/> <Setter Property="Background" Value="Transparent" /> </Style> </UserControl.Resources> But when I use the following code to a ListView I get an warning/exception <UserControl.Resources> <Style BasedOn="{StaticResource {x:Type ListView}}" TargetType="{x:Type ListView}"> <Setter Property="HorizontalContentAlignment" Value="Stretch"/> <Setter Property="Background" Value="Transparent" /> </Style> </UserControl.Resources> "StaticResource reference 'System.Windows.Controls.ListView' was not found." Why and how to solve it? I want the functionality of a ListView.

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  • Linq to NHibernate, Order by Rand() ?

    - by Felipe
    Hi everybody, I'm using Linq To Nhibernate, and with a HQL statement I can do something like this: string hql = "from Entity e order by rand()"; Andi t will be ordered so random, and I'd link to know How can I do the same statement with Linq to Nhibernate ? I try this: var result = from e in Session.Linq<Entity> orderby new Random().Next(0,100) select e; but it throws a exception and doesn't work... is there any other way or solution? Thanks Cheers

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  • InvalidOperationException When XML Serializing Inherited Class

    - by Nick
    I am having an issue serializing a c# class to an XML file that has a base class... here is a simple example: namespace Domain { [Serializable] public class ClassA { public virtual int MyProperty { get; set; } } } namespace Derived { public class ClassA : Domain.ClassA { public override int MyProperty { get { return 1; } set { /* Do Nothing */ } } } } When I attempt to serialize an instance of Derived.ClassA, I receive the following exception: InvalidOperationException(Types 'Domain.ClassA' and 'Derived.ClassA' both use the XML type name 'ClassA', from the namespace ". Use XML attributes to specify a unique XML name and/or namespace for the type.) The problem is that I want to create a single base class that simply defines the structure of the XML file, and then allow anyone else to derive from that class to insert business rules, but that the formatting will come through from the base. Is this possible, and if so, how do I attribute the base class to allow this?

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  • LINQ - Select Statement - The null value cannot be assigned to a member with type System.Int32 which

    - by thiag0
    I am trying to achieve the following... _4S.NJB_Request request = (from r in db.NJB_Requests where r.RequestId == referenceId select r).Take(1).SingleOrDefault(); Getting the following exception... Message: The null value cannot be assigned to a member with type System.Int32 which is a non-nullable value type. StackTrace: at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) at System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression) at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source) at DAL.SqlDataProvider.MarkNJBPCRequestAsComplete(Int32 referenceId, Int32 processState) I have verified that 'referenceId' does have a value. Anyone know why this would happen in a select statement? Thanks!

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  • Error while installing Microsoft SQL Server 2005 on Windows 7

    - by Brian Roisentul
    I was trying to install Microsoft SQL Server 2005 on my Windows 7 pc. When I tried to install it, it tells me that I have a newer version installed on my pc. So, I checked that Microsoft Sharepoint 2010 installed some sql server 2008 tools for me. I decided to uninstall SharePoint 2010(which I wasn't using) and then tried to install MS SQL Server 2005 again. This threw me the following exception: Error 1603 installing microsoft sql server setup support files Searching on Google I found this article: http://support.microsoft.com/kb/916760 but it's not my case actually. Any help will be appreciated. I really need this to continue working.

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