invoke

问题 I use some Delegate and Events to Implement NamedPipes like this: public delegate void MessageReceivedHandler(byte[] message, Client client); public event MessageReceivedHandler MessageReceived; void ListenForClients() { //Do some Thread readThread = new Thread(Read) { IsBackground = true }; } void Read(object clientObj) { //Do Some if(MessageReceived != null) MessageReceived(ms.ToArray(),client); } When I Use this event in Form Class(Inherited from Control object) the Implementation is:

问题 I'm trying to call the Add-AppxPackage cmdlet from C#. I found the MSDN article on running PowerShell from C# code. I have referenced the System.Management.Automation assembly and have tried the following code snippets, all of which result in the same exception when trying to call powerShell.Invoke(): System.Management.Automation.CommandNotFoundException was unhandled The term 'Add-AppxPackage' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the

问题 Hi I am new to this system, please be gentle with me. The problem I am now having is the inability to call the class file from ASPX through Eval. The class file is located in "~/classes" folder. Please provide me with methods and ways to evade this error or even solve it thank you!! ^^ Programming language : C# Problem found in : .ASPX gridView Problem also found in : EstateDBManager class file Error Message : DataBinding: 'DWAD_Project.classes.Volunteer' does not contain a property with the

问题 what is the difference between BeginInvoke/EndInvoke and P/invoke? 回答1: They only have the verb "invoke" in common. Generically, invoke == call. The p in pinvoke means "platform", the pinvoke marshaller is a chunk of code inside the CLR that knows how to properly call native (platform specific) code. BeginInvoke is a heavily overloaded method name that starts an asynchronous method call. The compiler automatically generates one for every delegate type. Along with Invoke and EndInvoke. They

问题 So basically I have a MainWindow , a class SetupViewModel defined in a separate cs file, and another class ImageViewModel in a separate cs file; I am wondering is there anyway I can invoke the operation in MainWindow from ImageViewModel . More details listed below: in ImageViewModel, invoke the change in MainWindow as following (following code in MainWindow ): this.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal, new Action( delegate() { ((SetupViewModel)this

问题 I get the "cross-thread operation not valid" here: if ( vlc.State == VlcPlayerControlState.PLAYING ) { if ( vlc.InvokeRequired ) { vlc.Invoke( new MediaPlayerNoParameterDelegate( vlc.Stop ) ); } else { vlc.Stop(); // debugger points here } } Debugging shows me that vlc doesn't require invoking. but the thread from which this is accessed is different from the thread it was created on. I'm using the libvlc.net wrapper to play sound, but the problem should not be there. How can I get rid of this

问题 I've created ASP.NET application and added simple WCF service to it. The ASP.NET application is host for WCF service. The service is running. The service looks as follows: [ServiceContract] public interface IService1 { [OperationContract] string DoWork(string text); } public class Service1 : IService1 { public string DoWork(string text) { return text.ToUpper(); } } On the client side is console application that should invoke WCF service dynamically. I use following code: WSHttpBinding binding

问题 I have different scenario, than in this question, therefore another question. Let's take following example: void PerformanceCriticalMethod() { Dispatcher.Invoke(() => Log.Add("1")); ... some job Dispatcher.Invoke(() => Log.Add("2")); } Invoke creates performance problems. In attempt to fix it I used InvokeAsync in place of Invoke and it seems to work , but it is important what 2 will be output after 1 . Can I rely on assumption what if two InvokeAsync are called from same thread they will

问题 Lots of examples of how to invoke methods, but how does one change a simple property? For demonstration-sake, here's a very simple set of code that should help. Let's say I need to set the visible property from a child form, and thus, it needs to be invoked: Friend Sub activateItem(ByVal myItem As PictureBox) If myItem.InvokeRequired = True Then ???? Else myItem.Visible = True End If End Sub Thanks 回答1: If you're using VB.Net 2010, you can use a lambda expression: If myItem.InvokeRequired

问题 Edit ok, great feedback here, got me pointed in the right direction. Use case for invoking anonymous closure is in Scalatra routing layer. I have a bunch of routes that are grouped together under various types, in this example, requests common to teams: class Router { type TeamType <: _Controller with _Team get("""(schedules|rosters|teamresults|teamstats)/\d{8}""".r) { val clazz :: date = captures val obj = (clazz match { case "schedules" => new RosterController case "rosters" => new