C# 如何在WinForms应用程序的另一个流程实例中调用方法？

我正在开发一个使用互斥体的应用程序，以确保它是系统上运行的应用程序的唯一实例

当应用程序的另一个实例尝试启动时，我希望在原始实例中运行一个方法

我可以从应用程序的另一个实例调用应用程序中的特定方法吗

我发现了一些通过将消息发送到HWND_BROADCAST来使用RegisterWindowMessage/PostMessage Win32 API的示例，但我无法让它们正常工作，而且我在其他地方读到过使用HWND_BROADCAST可能会有危险

---

有没有更好的方法不需要让应用程序在特权模式下运行？

我以前做过这方面的研究-你可以使用本文中演示的内存映射文件，或者你可以像我那样做（简单的方法）并利用vb.net的功能（特别是，它允许您制作单实例应用程序，并在当前运行的实例中调用通过命令行args传递的方法[以便您可以使用它来调用应用程序中的方法]）.我知道在C#中使用VB类听起来有点糟糕，但这是最抽象、最简单的方法。链接到相关文章-

的最后一部分这里是我写的一个小助手

要使用它：

var pipeListener = new NamedPipeListener<String>(); // instantiate an instance
pipeListener.MessageReceived += (sender, e) => MessageBox.Show(e.Message); // when a message is received, show a messagebox with the message
pipeListener.Error += (sender, e) => MessageBox.Show("Error ({0}): {1}", e.ErrorType, e.Exception.Message); // oh noes!
pipeListener.Start(); // when you're ready, start listening

var pipeListener=new NamedPipeListener（）；//实例化一个实例
pipeListener.MessageReceived+=（发件人，e）=>MessageBox.Show（e.Message）；//收到消息时，显示包含消息的MessageBox
pipeListener.Error+=（sender，e）=>MessageBox.Show（“Error（{0}）：{1}”，e.ErrorType，e.Exception.Message）；//哦，不！
pipeListener.Start（）；//准备好后，开始侦听

从另一个过程：

NamedPipeListener<String>.SendMessage("Howdy howdy howdy");

NamedPipeListener.SendMessage（“Howdy-Howdy-Howdy”）；

请注意，它使用PipeListener的全名作为管道的默认名称。如果需要更加谨慎，请使用采用管道名称的构造函数重载

下面是课程：

using System;
using System.IO.Pipes;
using System.Runtime.Serialization.Formatters.Binary;

namespace FunWithNamedPipes
{
    /// <summary>Contains event data for <see cref="NamedPipeMessageReceiveHandler{TMessage}" /> events.</summary>
    /// <typeparam name="TMessage"></typeparam>
    public class NamedPipeListenerMessageReceivedEventArgs<TMessage> : EventArgs
    {
        /// <summary>Initializes an instance of <see cref="NamedPipeListenerMessageReceivedEventArgs{TMessage}" /> with the specified <paramref name="message" />.</summary>
        /// <param name="message">The message passed by the event.</param>
        public NamedPipeListenerMessageReceivedEventArgs(TMessage message)
        {
            this.Message = message;
        }

        /// <summary>Gets the message passed by the event.</summary>
        public TMessage Message { get; private set; }
    }

    /// <summary>Contains event data for <see cref="NamedPipeListenerErrorEventHandler" /> events.</summary>
    public class NamedPipeListenerErrorEventArgs : EventArgs
    {
        /// <summary>Initializes an instance of <see cref="NamedPipeListenerErrorEventArgs" /> with the specified <paramref name="errorType" /> and <paramref name="exception" />.</summary>
        /// <param name="errorType">A <see cref="NamedPipeListenerErrorType" /> describing the part of the listener process where the error was caught.</param>
        /// <param name="ex">The <see cref="Exception" /> that was thrown.</param>
        public NamedPipeListenerErrorEventArgs(NamedPipeListenerErrorType errorType, Exception ex)
        {
            this.ErrorType = errorType;
            this.Exception = ex;
        }

        /// <summary>Gets a <see cref="NamedPipeListenerErrorType" /> describing the part of the listener process where the error was caught.</summary>
        public NamedPipeListenerErrorType ErrorType { get; private set; }

        /// <summary>Gets the <see cref="Exception" /> that was caught.</summary>
        public Exception Exception { get; private set; }
    }

    /// <summary>Represents a method that will handle an event where a message is received via named pipes.</summary>
    /// <typeparam name="TMessage">The type of message that will be received.</typeparam>
    /// <param name="sender">The source of the event.</param>
    /// <param name="e">The event data passed by the event, which includes the message that was received.</param>
    public delegate void NamedPipeMessageReceivedHandler<TMessage>(Object sender, NamedPipeListenerMessageReceivedEventArgs<TMessage> e);

    /// <summary>Represents a method that will handle an event that is fired when an exception is caught.</summary>
    /// <param name="sender">The source of the event.</param>
    /// <param name="e">The event data passed by the event, included the error type and exception that was caught.</param>
    public delegate void NamedPipeMessageErrorHandler(Object sender, NamedPipeListenerErrorEventArgs e);

    /// <summary>Includes different types of errors that describe where in the listening process an exception was caught.</summary>
    public enum NamedPipeListenerErrorType : byte
    {
        /// <summary>Indicates that an exception was caught while calling <see cref="NamedPipeServerStream.BeginWaitForConnection" />.</summary>
        BeginWaitForConnection = 1,

        /// <summary>Indicates that an exception was caught while calling <see cref="NamedPipeServerStream.EndWaitForConnection" />.</summary>
        EndWaitForConnection = 2,

        /// <summary>Indicates that an exception was caught while deserializing a message received from the named pipe.</summary>
        DeserializeMessage = 3,

        /// <summary>Indicates that an exception was caught while closing or disposing a used named pipe.</summary>
        CloseAndDisposePipe = 4,

        /// <summary>Indicates that an exception was caught while invoking the <see cref="NamedPipeListener{TMessage}.MessageReceived"/> event.</summary>
        NotifyMessageReceived = 5
    }

    /// <summary>A helper class for sending and receiving messages using named pipes.</summary>
    /// <typeparam name="TMessage">The type of message that will be sent or received.</typeparam>
    public class NamedPipeListener<TMessage> : IDisposable
    {
        /// <summary>Occurs when a message is received.</summary>
        public event NamedPipeMessageReceivedHandler<TMessage> MessageReceived;

        /// <summary>Occurs when an exception is caught.</summary>
        public event NamedPipeMessageErrorHandler Error;

        static readonly String DEFAULT_PIPENAME = typeof(NamedPipeListener<TMessage>).FullName;
        static readonly BinaryFormatter formatter = new BinaryFormatter();

        NamedPipeServerStream pipeServer;

        /// <summary>Initializes a new instance of <see cref="NamedPipeListener{TMessage}" /> using the specified <paramref name="pipeName" />.</summary>
        /// <param name="pipeName">The name of the named pipe that will be used to listen on.</param>
        public NamedPipeListener(String pipeName)
        {
            this.PipeName = pipeName;
        }

        /// <summary>Initializes a new instance of <see cref="NamedPipeListener{TMessage}" /> using the default pipe name.</summary>
        /// <remarks>The default pipe name is the full name of the type of the instance.</remarks>
        public NamedPipeListener()
            : this(DEFAULT_PIPENAME) { }

        /// <summary>The name of the named pipe that will be used to listen on.</summary>
        public String PipeName { get; private set; }

        /// <summary>Starts listening on the named pipe specified for the instance.</summary>
        internal void Start()
        {
            if (pipeServer == null) pipeServer = new NamedPipeServerStream(DEFAULT_PIPENAME, PipeDirection.In, 1, PipeTransmissionMode.Message, PipeOptions.Asynchronous);

            try { pipeServer.BeginWaitForConnection(new AsyncCallback(PipeConnectionCallback), null); }
            catch (Exception ex) { this.OnError(NamedPipeListenerErrorType.BeginWaitForConnection, ex); }
        }

        private void PipeConnectionCallback(IAsyncResult result)
        {
            try
            {
                pipeServer.EndWaitForConnection(result);
            }
            catch (Exception ex)
            {
                this.OnError(NamedPipeListenerErrorType.EndWaitForConnection, ex);
                return;
            }

            TMessage message;
            try
            {
                message = (TMessage)formatter.Deserialize(pipeServer);
            }
            catch (Exception ex)
            {
                this.OnError(NamedPipeListenerErrorType.DeserializeMessage, ex);
                return;
            }

            try
            {
                this.OnMessageReceived(new NamedPipeListenerMessageReceivedEventArgs<TMessage>(message));
            }
            catch (Exception ex)
            {
                this.OnError(NamedPipeListenerErrorType.NotifyMessageReceived, ex);
                return;
            }

            if (this.End())
            {
                this.Start();
            }
        }

        internal Boolean End()
        {
            try
            {
                pipeServer.Close();
                pipeServer.Dispose();
                pipeServer = null;

                return true;
            }
            catch (Exception ex)
            {
                this.OnError(NamedPipeListenerErrorType.CloseAndDisposePipe, ex);
                return false;
            }
        }

        private void OnMessageReceived(TMessage message)
        {
            this.OnMessageReceived(new NamedPipeListenerMessageReceivedEventArgs<TMessage>(message));
        }

        protected virtual void OnMessageReceived(NamedPipeListenerMessageReceivedEventArgs<TMessage> e)
        {
            if (this.MessageReceived != null)
            {
                this.MessageReceived(this, e);
            }
        }

        private void OnError(NamedPipeListenerErrorType errorType, Exception ex)
        {
            this.OnError(new NamedPipeListenerErrorEventArgs(errorType, ex));
        }

        protected virtual void OnError(NamedPipeListenerErrorEventArgs e)
        {
            if (this.Error != null)
            {
                this.Error(this, e);
            }
        }

        void IDisposable.Dispose()
        {
            if(pipeServer != null)
            {
                try { pipeServer.Disconnect(); }
                catch { }

                try { pipeServer.Close(); }
                catch { }

                try { pipeServer.Dispose(); }
                catch { }
            }
        }

        /// <summary>Sends the specified <paramref name="message" /> to the default named pipe for the message.</summary>        
        /// <param name="message">The message to send.</param>
        public static void SendMessage(TMessage message)
        {
            NamedPipeListener<TMessage>.SendMessage(DEFAULT_PIPENAME, message);
        }

        /// <summary>Sends the specified <paramref name="message" /> to the specified named pipe.</summary>
        /// <param name="pipeName">The name of the named pipe the message will be sent to.</param>
        /// <param name="message">The message to send.</param>
        public static void SendMessage(String pipeName, TMessage message)
        {
            using (var pipeClient = new NamedPipeClientStream(".", DEFAULT_PIPENAME, PipeDirection.Out, PipeOptions.None))
            {
                pipeClient.Connect();

                formatter.Serialize(pipeClient, message);
                pipeClient.Flush();

                pipeClient.WaitForPipeDrain();
                pipeClient.Close();
            }
        }
    }
}

使用系统；
使用System.IO.Pipes；
使用System.Runtime.Serialization.Formatters.Binary；
命名空间FunWithNamedPipes
{
///包含事件的事件数据。
/// 
名为PipeListenerMessageReceivedEventArgs的公共类：EventArgs
{
///使用指定的初始化的实例。
///事件传递的消息。
公共名称PipeListenerMessageReceivedEventArgs（TMessage message）
{
this.Message=消息；
}
///获取事件传递的消息。
公共TMessage消息{get；private set；}
}
///包含事件的事件数据。
公共类名称PipeListenerErrorEventArgs:EventArgs
{
///使用指定的和初始化的实例。
///描述侦听器进程中捕获错误的部分的。
///被扔出去的那个。
公共名称PipeListenerErrorEventArgs（名称PipeListenerErrorType errorType，异常示例）
{
this.ErrorType=ErrorType；
这个.Exception=ex；
}
///获取描述侦听器进程中捕获错误的部分的。
public NamedPipeListenerErrorType错误类型{get；private set；}
///获取被捕获的数据。
公共异常异常{get；private set；}
}
///表示将处理通过命名管道接收消息的事件的方法。
///将接收的消息的类型。
///事件的来源。
///事件传递的事件数据，包括接收到的消息。
公共委托void NamedPipeMessageReceivedHandler（对象发送者，NamedPipeListenerMessageReceivedEventArgs e）；
///表示一个方法，该方法将处理捕获异常时激发的事件。
///事件的来源。
///事件传递的事件数据包括捕获的错误类型和异常。
公共委托void NamedPipeMessageErrorHandler（对象发送者，NamedPipeListenerErrorEventArgs e）；
///包括不同类型的错误，这些错误描述在侦听过程中捕获异常的位置。
公共枚举NamedPipeListenerErrorType:字节
{
///指示调用时捕获到异常。
BeginWaitForConnection=1，
///指示调用时捕获到异常。
EndWaitForConnection=2，
///指示在反序列化从命名管道接收的消息时捕获异常。
反序列化消息=3，
///指示在关闭或处理已使用的命名管道时捕获异常。
CloseAndDisposePipe=4，
///指示调用事件时捕获异常。
NotifyMessageReceived=5
}
///用于使用命名管道发送和接收消息的帮助器类。
///将要发送或接收的消息的类型。
公共类NamedPipeListener:IDisposable
{
///在收到消息时发生。
名为PipeMessageReceivedHandler MessageReceived的公共事件；
///捕获异常时发生。
公共事件NamedPipeMessageErrorHandler错误；
静态只读字符串默认值_PIPENAME=typeof（NamedPipeListener）.FullName；
静态只读BinaryFormatter formatter=新的BinaryFormatter（）；
NamedPipeServerStream pipeServer；
///使用指定的参数初始化的新实例。
///将用于侦听的命名管道的名称。
公共名称PipeListener（字符串pipeName）
{
this.PipeName=管道名称；
}
///使用默认管道名称初始化的新实例。
///默认管道名称是实例类型的全名。
公共名称管道侦听器（）
：此（默认管道名称）{}