ConsoleCancelEventArgs Class
Provides data for the Console.CancelKeyPress event. This class cannot be inherited.
Assembly: mscorlib (in mscorlib.dll)
The ConsoleCancelEventArgs type exposes the following members.
Name | Description | |
---|---|---|
Cancel | Gets or sets a value indicating whether simultaneously pressing the Control modifier key and C console key (CTRL+C) terminates the current process. | |
SpecialKey | Gets the combination of modifier and console keys that interrupted the current process. |
Name | Description | |
---|---|---|
Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) | |
Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) | |
GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) | |
GetType | Gets the Type of the current instance. (Inherited from Object.) | |
MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) | |
ToString | Returns a string that represents the current object. (Inherited from Object.) |
A user can interrupt a console application process by simultaneously pressing the Control modifier key and the C console key (CTRL+C), or the Control modifier key and the BREAK console key (CTRL+BREAK). The .NET Framework consequently provides a ConsoleCancelEventArgs object to the event handler for the Console.CancelKeyPress event.
If CTRL+C was pressed and the Cancel property is set to true in the event handler, the process is resumed; otherwise, the process is terminated. If CTRL+BREAK is pressed, the process is terminated if you set the Cancel property to false, and an exception is thrown if you set the Cancel property to true.
The following code example demonstrates how to use the ConsoleCancelEventArgs class to handle an event.
using System; class Sample { public static void Main() { ConsoleKeyInfo cki; Console.Clear(); // Establish an event handler to process key press events. Console.CancelKeyPress += new ConsoleCancelEventHandler(myHandler); while (true) { Console.Write("Press any key, or 'X' to quit, or "); Console.WriteLine("CTRL+C to interrupt the read operation:"); // Start a console read operation. Do not display the input. cki = Console.ReadKey(true); // Announce the name of the key that was pressed . Console.WriteLine(" Key pressed: {0}\n", cki.Key); // Exit if the user pressed the 'X' key. if (cki.Key == ConsoleKey.X) break; } } protected static void myHandler(object sender, ConsoleCancelEventArgs args) { Console.WriteLine("\nThe read operation has been interrupted."); Console.WriteLine(" Key pressed: {0}", args.SpecialKey); Console.WriteLine(" Cancel property: {0}", args.Cancel); // Set the Cancel property to true to prevent the process from terminating. Console.WriteLine("Setting the Cancel property to true..."); args.Cancel = true; // Announce the new value of the Cancel property. Console.WriteLine(" Cancel property: {0}", args.Cancel); Console.WriteLine("The read operation will resume...\n"); } } // The example displays output similar to the follwoing: // Press any key, or 'X' to quit, or CTRL+C to interrupt the read operation: // Key pressed: J // // Press any key, or 'X' to quit, or CTRL+C to interrupt the read operation: // Key pressed: Enter // // Press any key, or 'X' to quit, or CTRL+C to interrupt the read operation: // // The read operation has been interrupted. // Key pressed: ControlC // Cancel property: False // Setting the Cancel property to true... // Cancel property: True // The read operation will resume... // // Key pressed: Q // // Press any key, or 'X' to quit, or CTRL+C to interrupt the read operation: // Key pressed: X
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
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.