how to send a delegate to a fuction with a parameter?

[Hussam Fattahi]

I don't know if the above question is correct, my english it's not very good. however, i'm trying to make a safe thread call to a form : I have declared a chatForms array with name (chatsAvailabel), so when i want to show one of them i call the fuction ShowForm with a parameter that specify the index of the form in the array.

 delegate void ShowFormCallback(int index);

private void ShowForm(int index)
        {
            if (this.chatsAvailabe[index].InvokeRequired)
            {
                ShowFormCallback tmp = new ShowFormCallback(ShowForm(index));  //error here
                this.chatsAvailabe[index].Invoke(tmp);
            }
            else
                this.chatsAvailabe[index].Show();
        }

but the problem occures when the InvokeRequired is true in if bolck, i must declare an instance from the ShowFormCallback delegate to use with invoke, but how could i send parmaeter index again along with this delegate instance. thanks in advance

[Lost User]

what about this style? : private delegate void ShowFormCallback (int index); private void ShowForm (int index) { if (this.chatsAvailabe[index].InvokeRequired) this.chatsAvailable[index].Invoke(new ShowFormCallback(ShowForm),new object[] { index }); else this.cahtsAvailable[index].Show(); } VirtualVoid.NET

[Hussam Fattahi]

it's do work without error or exception, but the new showed form freeze(not rsponding) on screen which mean that the operation it's not thread safe.

[Lost User]

maybe ShowDialog() can help ? (not just Show())

VirtualVoid**.NET**

[Ennis Ray Lynch Jr]

You are not correctly using delegates. Try this:

private void InvokeShowForm(int index){
if(InvokeRequired){
Invoke(new ShowFormCallback(ShowForm), new object[]{index}));
}
else{
ShowForm(index);
}
}

public void ShowForm(int index){
chatsAvailable[index].Show();
}

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