WCF debugging: Event not triggering unless MessageBox.Show is performed

问题

This one has me a bit perplexed. I have a Shown event for a form, but the event's implementation doesn't process unless I display a MessageBox.

Here is my code which does not work:

    private void MainForm_Shown(object sender, EventArgs e)
    {
        string[] arguments = Environment.GetCommandLineArgs();

        foreach (var argument in arguments)
        {
            if (argument == "someArgs")
            {
                var something = doSomeStuff();
            }
        }
    }

Whenever I add a message box like this though, it works:

    private void MainForm_Shown(object sender, EventArgs e)
    {
        string[] arguments = Environment.GetCommandLineArgs();

        foreach (var argument in arguments)
        {
            if (argument == "someArgs")
            {
                var something = doSomeSuff();
            }
            else
            {
                MessageBox.Show(argument);
            }
        }
    }

I have tried using both a Form_Load and Form_Activated event, but they both cause my program to crash entirely do to the implementation in doSomeStuff.

Just a little background of how this program works. I'm trying to establish a WCF connection. I have already successfully done this with some hard-coded values, but I'm trying to make it dynamic via the doSomeStuff method. I believe a race condition is occurring which the MessageBox is fixing somehow. Application A is starting Application B (the source code I have shown here) then sending a command line argument with some parameters into Application B. Without the MessageBox, Application A throws a TCP 10061 error.

Another point of interest, is there any easy way to debug WCF connections? I have access to the source of both applications, but I'm not sure if it is possible to have Application A launch Application B with the debugger (instead of just the executable). This would help immensely.

EDIT: Was playing around a bit more... found that if I use an Application.DoEvents() instead of a messageBox, it's the same result.

来源：https://stackoverflow.com/questions/31949957/wcf-debugging-event-not-triggering-unless-messagebox-show-is-performed

标签

.net

wcf

race-condition