How to use invoke in C#?

In C#, the Invoke method is typically used to perform operations on UI elements from a thread outside of the UI thread, as UI elements can only be accessed from the thread that created them. Here is how the Invoke method is used:

1. Create a delegate that contains the operation to be executed on the UI thread.

delegate void UpdateTextDelegate(string text);

1. Call upon

private void UpdateText(string text)
{
    if (textBox1.InvokeRequired)
    {
        UpdateTextDelegate del = new UpdateTextDelegate(UpdateText);
        this.Invoke(del, new object[] { text });
    }
    else
    {
        textBox1.Text = text;
    }
}

In the example above, the UpdateText method is used to update the text content of textBox1. If the current thread is not the UI thread, the delegate is called through the Invoke method to execute the update operation on the UI thread.

1. Please could you update the text.

UpdateText("Hello, World!");

By using the Invoke method, it ensures that when operating UI elements on a non-UI thread, it will not throw an exception and guarantee that the operation is executed on the UI thread, thus avoiding potential threading issues.