Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

PictureBox.LoadCompleted Event

Occurs when the asynchronous image-load operation is completed, been canceled, or raised an exception.

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

public event AsyncCompletedEventHandler LoadCompleted

The LoadCompleted occurs only when the image is loaded asynchronously by using one of the LoadAsync methods, and WaitOnLoad is false. If the image-load is canceled by calling the CancelAsync method the Cancelled property of the AsyncCompletedEventArgs will be set to true. If an exception or error occurs during the load process, it will be caught and the Error property of the AsyncCompletedEventArgs will contain the exception information.

For more information about handling events, see Consuming Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the LoadCompleted event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type PictureBox named PictureBox1. Then ensure that the event handler is associated with the LoadCompleted event.

private void PictureBox1_LoadCompleted(Object sender, AsyncCompletedEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Cancelled", e.Cancelled );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Error", e.Error );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "UserState", e.UserState );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "LoadCompleted Event" );
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

Community Additions

ADD
Show:
© 2015 Microsoft