MethodInvoker Delegate


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Represents a delegate that can execute any method in managed code that is declared void and takes no parameters.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public delegate void MethodInvoker()

MethodInvoker provides a simple delegate that is used to invoke a method with a void parameter list. This delegate can be used when making calls to a control's Invoke method, or when you need a simple delegate but do not want to define one yourself.

The following code example demonstrates how to use a MethodInvoker to call a method that updates the title bar of the application form.

public partial class Form1 : Form
    public Form1()
        // Create a timer that will call the ShowTime method every second.
        var timer = new System.Threading.Timer(ShowTime, null, 0, 1000);           

    private void ShowTime(object x)
        // Don't do anything if the form's handle hasn't been created 
        // or the form has been disposed.
        if (!this.IsHandleCreated && !this.IsDisposed) return;

        // Invoke an anonymous method on the thread of the form.
        this.Invoke((MethodInvoker) delegate
            // Show the current time in the form's title bar.
            this.Text = DateTime.Now.ToLongTimeString();

.NET Framework
Available since 1.1
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