Cross Tread Operations

Question

I am using delegates yet still getting 'cross thread operation not valid' errors. This is the function I am calling from another form: [CODE] edit see below [/CODE]

jesse · Answer

Well I figured it out: [code] private delegate string GetSelectedItemURLDelegate(); if (this.PlaylistListbox.InvokeRequired) { return this.PlaylistListbox.Invoke(new GetSelectedItemURLDelegate(this.GetSelectedItemURL)) as string; } else { [/code]

jesse · Answer

Actually i got the question from above to work. Now I have a different question. I cannot get a function that returns, to be able to use a delegate correctly. This code only returns "none" and never the selected item [CODE] private delegate string GetSelectedItemURLDelegate(); public string GetSelectedItemURL() { string returnUrl = "none"; if (this.PlaylistListbox.InvokeRequired) { this.PlaylistListbox.Invoke(new GetSelectedItemURLDelegate(this.GetSelectedItemURL)); } else { if (PlaylistListbox.SelectedItem == null) { if (PlaylistListbox.Items.Count != 0) { PlaylistListbox.SelectedIndex = 0; returnUrl = PlaylistListbox.SelectedItem.ToString(); } } else { returnUrl = PlaylistListbox.SelectedItem.ToString(); } } return returnUrl; } [/CODE]

Cross Tread Operations

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