我有一个WPF窗口应用程序。 有一个新请求要求启用应用程序的命令行参数。
从命令行启动应用程序(调用app.exe
)时不带参数,应该启动GUI(与以前一样)
使用GUI开关(例如app.exe -gui
)从命令行启动应用程序应该会像以前一样启动GUI
从命令行启动应用程序并进行其他切换(例如app.exe -f a -b e
)应在控制台模式(无窗口)下运行该应用程序
我浏览了多个帖子,例如Start WPF Application in Console Application(以及类似的文章),No output to console from a WPF application,并回顾了命令行解析器实用程序,例如Commandline Parser。
实现上述所有功能(请参见下面的代码)时,在选项3中,应用程序正在新的控制台进程(新的cmd窗口)中运行,因此错误的参数或--help
开关会立即打开新窗口它正在关闭。
如何使用从中调用应用程序的控制台?因此,当用户打开新的cmd窗口并键入app.exe --help
时,将不会打开新的控制台进程/窗口。
[SuppressUnmanagedCodeSecurity]
public static class ConsoleManager
{
private const string Kernel32_DllName = "kernel32.dll";
[DllImport(Kernel32_DllName)]
private static extern bool AllocConsole();
[DllImport(Kernel32_DllName)]
private static extern bool FreeConsole();
[DllImport(Kernel32_DllName)]
private static extern IntPtr GetConsoleWindow();
[DllImport(Kernel32_DllName)]
private static extern int GetConsoleOutputCP();
public static bool HasConsole
{
get { return GetConsoleWindow() != IntPtr.Zero; }
}
/// <summary>
/// Creates a new console instance if the process is not attached to a console already.
/// </summary>
public static void Show()
{
//#if DEBUG
if (!HasConsole)
{
AllocConsole();
InvalidateOutAndError();
}
//#endif
}
/// <summary>
/// If the process has a console attached to it, it will be detached and no longer visible. Writing to the System.Console is still possible, but no output will be shown.
/// </summary>
public static void Hide()
{
if (HasConsole)
{
SetOutAndErrorNull();
FreeConsole();
}
}
static void InvalidateOutAndError()
{
Type type = typeof(System.Console);
System.Reflection.FieldInfo _out = type.GetField("_out",
System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);
System.Reflection.FieldInfo _error = type.GetField("_error",
System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);
System.Reflection.MethodInfo _InitializeStdOutError = type.GetMethod("InitializeStdOutError",
System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);
Debug.Assert(_out != null);
Debug.Assert(_error != null);
Debug.Assert(_InitializeStdOutError != null);
_out.SetValue(null, null);
_error.SetValue(null, null);
_InitializeStdOutError.Invoke(null, new object[] { true });
}
static void SetOutAndErrorNull()
{
Console.SetOut(TextWriter.Null);
Console.SetError(TextWriter.Null);
}
}
我的Starter
类中的代码
[STAThread]
public static void Main(string[] args)
{
// enable the console
ConsoleManager.Show();
parser.ExtractArgumentAttributes(CommandLineArguments);
try
{
parser.ParseCommandLine(args);
if (parser.ParsingSucceeded)
{
CommandLineArguments.AnalyzeOptions();
if (CommandLineArguments.OpenMode == CmdLineArguments.UI_TYPE.GUI)
{
// GUI usage model
ConsoleManager.Hide(); // shutdown the console
App.Main(); // start up the UI
}
else // command line usage
{
// do stuff without a GUI
}
}
}
catch (CommandLineException parser_exception)
{
Console.WriteLine(parser_exception.Message);
parser.ShowUsage();
}
}