I have a scenario. (Windows Forms, C#, .NET) There is a main form which hosts some user control. The user control does some heavy data operation, such that if I directly call the Usercontrol_Load method the UI become nonresponsive for the duration for load method execution. To overcome this I load data on different thread (trying to ch...
If I have two variables: Object obj; String methodName = "getName"; Without knowing the class of obj, how can I call the method identified by methodName on it? The method being called has no parameters, and a String return value - a getter for a Java bean. ...
Is there a way to Invoke an overloaded method using reflection in .NET (2.0). I have an application that dynamically instantiates classes that have been derived from a common base class. For compatibility purposes, this base class contains 2 methods of the same name, one with parameters, and one without. I need to call the parameterle...
I have a server application that receives information over a network and processes it. The server is multi-threaded and handles multiple sockets at time, and threads are created without my control through BeginInvoke and EndInvoke style methods, which are chained by corresponding callback functions. I'm trying to create a form, in addit...
Can anyone tell me why this code behaves the way it does? See comments embedded in the code... Am I missing something really obvious here? using System; namespace ConsoleApplication3 { public class Program { static void Main(string[] args) { var c = new MyChild(); c.X(); Conso...
Just wondering what the difference between BeginInvoke() and Invoke() are? Mainly what each one would be used for. EDIT: What is the difference between creating a threading object and calling invoke on that and just calling BeginInvoke() on a delegate? or are they the same thing? Thanks ...
I'm currently working on a project where a section of the code looks like this: Select Case oReader.Name Case "NameExample1" Me.Elements.NameExample1.Value = oReader.ReadString .... Case "NameExampleN" Me.Elements.NameExampleN.Value = oReader.ReadString .... End Select It continues on for a while. The c...
I got this error when trying to update an image. It was a cross-thread update, but I used .Invoke(), so that shouldn't be the problem, should it. ...
I have a somewhat complex WPF application which seems to be 'hanging' or getting stuck in a Wait call when trying to use the dispatcher to invoke a call on the UI thread. The general process is: Handle the click event on a button Create a new thread (STA) which: creates a new instance of the presenter and UI, then calls the method Dis...
I'm currently working with a specialized, interpreted, programming language implemented in Java. As a very small part of the language, I'd like to add the ability to make calls into Java. Before I dive into all of the nitty-gritty of reflection, I was wondering if anyone knew of a general library for doing the "backend" part of invoking...
I am attempting to manage an ajax connection by calling a button onclick method on a separate web part in order to force the partial postback on the consumer. Web part A (Provider) invokes the method on Web Part B (Consumer) Web Part A Type t = myButton.GetType(); object[] p = new object[1]; p[0] = EventArgs....
Hi, I currently trying to write a component where some parts of it should run on the UI thread (explanation would be to long). So the easiest way would be to pass a control to it, and use InvokeRequired/Invoke on it. But I don't think that it is a good design to pass a control reference to a "data/background"-component, so I'm searching...
Im trying to write to a form from an asynchronous call. The examples I seen on line show that this should work but I keep getting an error. First the call that is made though the Disbatcher never calls p. Second i get a System.Security.SecurityException on the call req.EndGetResponse(a); What could be causing the problem? public parti...
My TextBox won't update! I am using it as a Log to update what other things are doing... Form 1 code: using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.IO; using System.Data.OleDb; using System.Collections.Specialized; using System.Tex...
I just posted a question about how to get a delegate to update a textbox on another form. Just when I thought I had the answer using Invoke...this happens. Here is my code: Main Form Code: using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using Syst...
If I am setting the Text property of a Form from a non-UI thread, then I need to use Invoke to avoid a cross-thread error. But, I can read the Text property without using Invoke. Is this safe? If I try to read the Handle property of a Form I get a cross-threading error. If I read the IsDisposed property of a Form it works fine. How can I...
I'm trying to use the following snippet inside my tag file: <%@ attribute name="content" fragment="true"%> ... <c:set var="part" value="content"/> <jsp:invoke fragment="${part}" var="partValue"/> ... and compiler gives me the following error: Syntax error, insert ") Statement" to complete IfStatement so as I understand it's not per...
I understand that in .NET, one needs to use Control.Invoke(delegate) to perform operations on a control. This lead me to wondering in which environments Invoke is actually required. As far as i know, it was not required in older versions of, say, Visual Basic and Pascal. In particular, what is the status of Java (possibly version-depende...
I found this code: this.Invoke(new EventHandler(EventGetSum)); Is this not the same as writing: EventGetSum(); What's the use of this? ...
Hi! I'm devolping a Windows Mobile aplication in Compact Framework 2.0 SP1. How can I make invisible a label using invoke? Thanks! ...