TypeValidationEventArgs Class

The TypeValidationCompleted event occurs when a MaskedTextBox control performs optional type validation. Type validation occurs only when the MaskedTextBox.ValidatingType property is not null and a causal action occurs, such as the MaskedTextBox control losing focus. Type validation is the ability to convert the formatted input string to the type represented by the ValidatingType property. For more information about the type validation process, see the TypeValidationCompleted event.

If an event handler is implemented for TypeValidationCompleted, the handler receives a parameter of type TypeValidationEventArgs. This parameter contains information about the event, such as whether the type conversion process succeeded, the validating type, and so on.

The following code example demonstrates the use of this type. In the example, an event handler reports on the occurrence of the TypeValidationCompleted 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 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 MaskedTextBox named MaskedTextBox1. Then ensure that the event handler is associated with the TypeValidationCompleted event.

private void MaskedTextBox1_TypeValidationCompleted(Object sender, TypeValidationEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Cancel", e.Cancel );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "IsValidInput", e.IsValidInput );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Message", e.Message );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "ReturnValue", e.ReturnValue );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "ValidatingType", e.ValidatingType );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "TypeValidationCompleted Event" );
}

.NET Framework

.NET Framework Client Profile

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

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