PreviewKeyDownEventArgs.Control Property
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Gets a value indicating whether the CTRL key was pressed.
public:
property bool Control { bool get(); };
public bool Control { get; }
member this.Control : bool
Public ReadOnly Property Control As Boolean
true
if the CTRL key was pressed; otherwise, false
.
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the Control.PreviewKeyDown 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 a type that inherits from Control, such as a Button or ComboBox. Then name the instance Control1
and ensure that the event handler is associated with the Control.PreviewKeyDown event.
private void Control1_PreviewKeyDown(Object sender, PreviewKeyDownEventArgs e) {
System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Alt", e.Alt );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Control", e.Control );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "KeyCode", e.KeyCode );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "KeyValue", e.KeyValue );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "KeyData", e.KeyData );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Modifiers", e.Modifiers );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Shift", e.Shift );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "IsInputKey", e.IsInputKey );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "PreviewKeyDown Event" );
}
Private Sub Control1_PreviewKeyDown(sender as Object, e as PreviewKeyDownEventArgs) _
Handles Control1.PreviewKeyDown
Dim messageBoxVB as New System.Text.StringBuilder()
messageBoxVB.AppendFormat("{0} = {1}", "Alt", e.Alt)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "Control", e.Control)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "KeyCode", e.KeyCode)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "KeyValue", e.KeyValue)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "KeyData", e.KeyData)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "Modifiers", e.Modifiers)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "Shift", e.Shift)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "IsInputKey", e.IsInputKey)
messageBoxVB.AppendLine()
MessageBox.Show(messageBoxVB.ToString(),"PreviewKeyDown Event")
End Sub
Product | Versions |
---|---|
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
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