invoke

The MessageBox.Show call below shows "Inner". Is this a bug? private void Throw() { Invoke(new Action(() => { throw new Exception("Outer", new Exception("Inner")); })); } private void button1_Click(object sender, EventArgs e) { try { Throw(); } catch (Exception ex) { MessageBox.Show(ex.Message); // Shows "Inner" } } I had a look at the reference source for System.Windows.Forms.Control , and the code that deals with Invoke looks like this: try { InvokeMarshaledCallback(current); } catch (Exception t) { current.exception = t.GetBaseException(); } GetBaseException : public virtual Exception

I have a question. How can i invoke a web service and get the result from a C# desktop application. I am making a desktop app and I want it to be able to connect to my online ASP.net web services. How is this possible? In Solution Explorer, right-click your project node and select Add Service Reference. Enter the URL where your service WSDL is located. This is usually the URL of the service itself. This generates a strongly-typed proxy class in a new Services References folder in your project. Write code in your desktop app to instantiate the proxy class and invoke methods on it. The rest

The code block below results in the error: TargetParameterCountException was unhandled by user code. Parameter count mismatch. public void AddListViewItem(string[] Data) { if (InvokeRequired) { Invoke(new Action<string[]>(AddListViewItem), Data); } else { ListViewData.Items.Add(Data[0]).SubItems.AddRange ( new string[] { Data[1], Data[2], Data[3], } ); } } Any ideas? The error occurs because of array covariance; an array of strings is assignable to object[] . This causes the Invoke method to treat each element of the string array as if it should be an argument to the AddListViewItem method.

I am new to c# and do not understand the syntax of invoking a new action or even what an action is. From my understanding in Port1_DataReceived, I have to create an action because I am in a new tread... Can anyone elaborate on why I need to do this? public Form1() { InitializeComponent(); SerialPort Port1 = new SerialPort("COM11", 57600, Parity.None, 8, StopBits.One); Port1.DataReceived += new SerialDataReceivedEventHandler(Port1_DataReceived); Port1.Open(); } private void Port1_DataReceived(object sender, SerialDataReceivedEventArgs e) { SerialPort Port = (SerialPort)sender; string Line = "";

I'm trying to use threads and prevent the program from freezing while the thread is busy. It should show the progress (writing of 0's / 1's) and not just show the result after its done, freezing the form in the meanwhile. In the current program I'm trying to write to a textbox, and actually see constant progress, and the form can't be affected by the tasks of the other thread. What I have now is I can write to a textbox with a thread using invoke, but It only shows the result (Form freezes while thread is busy), and the form freezes. Form image: using System; using System.Collections.Generic;

I am developing an UI application that creates a COM object along the way. The problem is, I want to "move" this COM object entirely on a different thread. What I do is this: create the new thread I want to move the object into (with CreateThread API) after entering this thread, I'm calling PeekMessage to setup a message queue for it calling CoInitialize, CoCreateInstance to create the COM object, QueryInterface to get the interface I want finally I call a method on the interface that displays a MessageBox with the value returned by GetCurrentThreadId() (I have access to the VB6 code of the