Textbox.Text = "" <-- freezes my app

[Isaias Formacio Serna]

Hi, I have this code:

{



if (this._user!= null)
{
this.txtPassword.Text = "";
frmOperations FormOperations = new frmOperations(this);
FormOperations.ShowDialog();
//****
StatBar.Reset();
this.btnAccept.Enabled = true;
}

The problem is on the line this.txtPassword.Text, after this line the app
freezes, I know the problem is in this line because I've moved that same
line to the place where the asteriks are and it also freezes there, I've
deleted that line of code and the app runs perfectly. Is this a bug??? Does
anybody know about this kind of problems?

Thanks in advance,

Isaias Formacio

 

[Alex Feinman [MVP]]

Are you doing this from a second thread? On a timer?

 

[Chris Tacke, eMVP]

Do you have some event handler set up for that TextBox?

 

[Isaias Formacio Serna]

It's actually an asyncronous call of a webservice, when the call ends, this
is what it does next.

 

[Isaias Formacio Serna]

Nope.

Do you have some event handler set up for that TextBox?

 

[Alex Feinman [MVP]]

That's the problem. Async calls are made on a different thread. You cannot
change GUI element properties or call GUI element methods from secondary
threads. YOu need to use Control.Invoke (Label.Invoke, Form.Invoke etc) to
perform context switching

See:
http://msdn.microsoft.com/library/d...n-us/dnnetcomp/html/netcfmultithreadedapp.asp

 

[Isaias Formacio Serna]

Thanks a lot!

Isaias

That's the problem. Async calls are made on a different thread. You cannot
change GUI element properties or call GUI element methods from secondary
threads. YOu need to use Control.Invoke (Label.Invoke, Form.Invoke etc) to
perform context switching

See:
http://msdn.microsoft.com/library/d...n-us/dnnetcomp/html/netcfmultithreadedapp.asp