แก้ไข

แชร์ผ่าน

QueryContinueDragEventArgs.EscapePressed Property

  • Reference

Definition

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll
Source:
QueryContinueDragEventArgs.cs
Source:
QueryContinueDragEventArgs.cs
Source:
QueryContinueDragEventArgs.cs

Gets whether the user pressed the ESC key.

public:
 property bool EscapePressed { bool get(); };
public bool EscapePressed { get; }
member this.EscapePressed : bool
Public ReadOnly Property EscapePressed As Boolean

Property Value

Boolean

true if the ESC key was pressed; otherwise, false.

Examples

The following code example demonstrates the use of the EscapePressed . In the example, an event handler reports on the occurrence of the Control.QueryContinueDrag 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.QueryContinueDrag event.

private void Control1_QueryContinueDrag(Object sender, QueryContinueDragEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "KeyState", e.KeyState );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "EscapePressed", e.EscapePressed );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Action", e.Action );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "QueryContinueDrag Event" );
}

Private Sub Control1_QueryContinueDrag(sender as Object, e as QueryContinueDragEventArgs) _ 
     Handles Control1.QueryContinueDrag

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "KeyState", e.KeyState)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "EscapePressed", e.EscapePressed)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Action", e.Action)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"QueryContinueDrag Event")

End Sub

Remarks

By default, the QueryContinueDrag event sets Action to DragAction.Cancel if EscapePressed is true.

Applies to

See also