Parameter count mismatch with Invoke?
22,403
The error occurs because of array covariance; an array of strings is assignable to object[]
. This causes the Invoke
method to treat each element of the string
array as if it should be an argument to the AddListViewItem
method.
Here's a fix:
Invoke(new Action<string[]>(AddListViewItem), new object[] {Data});
(or)
Invoke(new Action<string[]>(AddListViewItem), (object)Data);
This makes it crystal-clear to Invoke
that the target method takes a single parameter.
Author by
sooprise
I like to program, but am a noob, which is why I'm here. <-My sexy fatbooth picture
Updated on June 01, 2020Comments
-
sooprise almost 4 years
The code block below results in the error: TargetParameterCountException was unhandled by user code. Parameter count mismatch.
public void AddListViewItem(string[] Data) { if (InvokeRequired) { Invoke(new Action<string[]>(AddListViewItem), Data); } else { ListViewData.Items.Add(Data[0]).SubItems.AddRange ( new string[] { Data[1], Data[2], Data[3], } ); } }
Any ideas?