C# delegate syntax issue

Question

The code I have so far is:

private void MyThreadRoutine()
{
    this.Invoke(this.showProgressGifDelegate);
    ModifyConnectString.main();
    this.Invoke(this.HideProgressGifDelegate);
}



public void showProgressGifDelegate() { pictureBox2.Visible = true; }
public void HideProgressGifDelegate() { pictureBox2.Visible = false; }

From what I can tell this should work but non the less it does not compile because I get the error

'Argument 1: cannot convert from 'method group' to 'System.Delegate'' and 'The best overloaded method match for 'System.Windows.Forms.Control.Invoke(System.Delegate, params object[])' has some invalid arguments'

Any ideas on the correct syntax for my code?

score 3 · Accepted Answer · answered Aug 19 '14 at 07:09

3

You should wrap your code in a MethodInvoker in order to convert your delegate to an instance of Delegate:

this.Invoke(new MethodInvoker(this.showProgressGifDelegate));
this.Invoke(new MethodInvoker(this.HideProgressGifDelegate));

answered Aug 19 '14 at 07:09

Patrick Hofman

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Thanks will accept as answer shortly. – Ben Aug 19 '14 at 07:12
No hurry. Will be here tomorrow too ;) . Glad I could help. See also the possible duplicate question, it has some other useful tips. – Patrick Hofman Aug 19 '14 at 07:13

C# delegate syntax issue

1 Answers1