Console::CancelKeyPress Event
Assembly: mscorlib (in mscorlib.dll)
This event is used in conjunction with System::ConsoleCancelEventHandler and System::ConsoleCancelEventArgs. The CancelKeyPress event enables a console application to intercept the CTRL+C signal so the application can decide whether to continue executing or terminate. For more information about handling events, see Consuming Events.
Use this event to explicitly control how your application responds to the CTRL+C signal. If your application has simple requirements, you can use the TreatControlCAsInput property instead of this event.
The event handler for this event is executed on a thread pool thread.
The following example demonstrates how the CancelKeyPress event is used.
using namespace System; void OnCancelKeyPressed(Object^ sender, ConsoleCancelEventArgs^ args) { Console::WriteLine("{0}The read operation has been interrupted.", Environment::NewLine); 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...{0}", Environment::NewLine); } int main() { // Clear the screen. Console::Clear(); // Establish an event handler to process key press events. Console::CancelKeyPress += gcnew ConsoleCancelEventHandler(OnCancelKeyPressed); while (true) { // Prompt the user. 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. ConsoleKeyInfo^ keyInfo = Console::ReadKey(true); // Announce the name of the key that was pressed . Console::WriteLine(" Key pressed: {0}{1}", keyInfo->Key, Environment::NewLine); // Exit if the user pressed the 'X' key. if (keyInfo->Key == ConsoleKey::X) { break; } } } // The example displays output similar to the following: // 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
- UIPermission
for modifying safe top-level windows and subwindows. Associated enumeration: UIPermissionWindow::SafeTopLevelWindows
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.