delphi – 寻找在进程间通信中使用的Windows消息的替代方法

使用命名管道,您可以发送任何类型的数据结构(只要服务器和客户端知道该数据结构是什么).我通常使用一系列记录来发送大量的信息.很方便

我使用Russell Libby的免费(和开源)命名管道组件.配有一个TPipeServer和一个TPipeClient可视化组件.他们使用命名管道非常简单,命名管道非常适合进程间通信(IPC).

You can get the component here.源代码描述如下：//说明：为Delphi设置客户机和服务器命名的管道组件,as
//很好的控制台管道重定向组件.

此外,Russell帮助我在Experts-Exchange上使用旧版本的这个组件,在控制台应用程序中通过命名管道发送/接收消息.这可能有助于作为使用他的组件让您开始运行的指南.请注意,在VCL应用程序或服务中,您不需要像我在此控制台应用程序中编写自己的消息循环.

program CmdClient;
{$APPTYPE CONSOLE}

uses
  Windows,Messages,SysUtils,Pipes;

type
  TPipeEventHandler =  class(TObject)
  public
     procedure  OnPipeSent(Sender: TObject; Pipe: HPIPE; Size: DWORD);
  end;

procedure TPipeEventHandler.OnPipeSent(Sender: TObject; Pipe: HPIPE; Size: DWORD);
begin
  WriteLn('On Pipe Sent has executed!');
end;

var
  lpMsg:         TMsg;
  WideChars:     Array [0..255] of WideChar;
  myString:      String;
  iLength:       Integer;
  pcHandler:     TPipeClient;
  peHandler:     TPipeEventHandler;

begin

  // Create message queue for application
  PeekMessage(lpMsg,WM_USER,PM_NOREMOVE);

  // Create client pipe handler
  pcHandler:=TPipeClient.CreateUnowned;
  // Resource protection
  try
     // Create event handler
     peHandler:=TPipeEventHandler.Create;
     // Resource protection
     try
        // Setup clien pipe
        pcHandler.PipeName:='myNamedPipe';
        pcHandler.ServerName:='.';
        pcHandler.OnPipeSent:=peHandler.OnPipeSent;
        // Resource protection
        try
           // Connect
           if pcHandler.Connect(5000) then
           begin
              // Dispatch messages for pipe client
              while PeekMessage(lpMsg,PM_REMOVE) do DispatchMessage(lpMsg);
              // Setup for send
              myString:='the message I am sending';
              iLength:=Length(myString) + 1;
              StringToWideChar(myString,wideChars,iLength);
              // Send pipe message
              if pcHandler.Write(wideChars,iLength * 2) then
              begin
                 // Flush the pipe buffers
                 pcHandler.FlushPipeBuffers;
                 // Get the message
                 if GetMessage(lpMsg,pcHandler.WindowHandle,0) then DispatchMessage(lpMsg);
              end;
           end
           else
              // Failed to connect
              WriteLn('Failed to connect to ',pcHandler.PipeName);
        finally
           // Show complete
           Write('Complete...');
           // Delay
           ReadLn;
        end;
     finally
        // Disconnect event handler
        pcHandler.OnPipeSent:=nil;
        // Free event handler
        peHandler.Free;
     end;
  finally
     // Free pipe client
     pcHandler.Free;
  end;

end.