Winform跨进程通信

  

   

    

     

    
    

     

      using System;
     
    
   

    

     

    
    

     

      using System.Collections.Generic;
     
    
   

    

     

    
    

     

      using System.Linq;
     
    
   

    

     

    
    

     

      using System.Runtime.InteropServices;
     
    
   

    

     

    
    

     

      using System.Text;
     
    
   

    

     

    
    

     

      using System.Threading.Tasks;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      namespace 大屏Win
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     
    public class WinMessageHelper
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     
        private struct COPYDATASTRUCT
     
    
   

    

     

    
    

     

              {
     
    
   

    

     

    
    

     
            public IntPtr dwData;
     
    
   

    

     

    
    

     
            public int cbData;
     
    
   

    

     

    
    

     

                  [MarshalAs(UnmanagedType.LPStr)]
     
    
   

    

     

    
    

     
            public string lpData;
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     
        //使用COPYDATA进行跨进程通信
     
    
   

    

     

    
    

     
        public const int WM_COPYDATA = 0x004A;
     
    
   

    

     

    
    

     

              [DllImport("User32.dll", EntryPoint = "SendMessage")]
     
    
   

    

     

    
    

     
        private static extern int SendMessage(
     
    
   

    

     

    
    

     
        int hWnd, // handle to destination window
     
    
   

    

     

    
    

     
        int Msg, // message
     
    
   

    

     

    
    

     
        int wParam, // first message parameter
     
    
   

    

     

    
    

     
        ref COPYDATASTRUCT lParam // second message parameter
     
    
   

    

     

    
    

     

              );
     
    
   

    

     

    
    

     

              [DllImport("User32.dll", EntryPoint = "FindWindow")]
     
    
   

    

     

    
    

     
        private static extern int FindWindow(string lpClassName, string lpWindowName);
     
    
   

    

     

    
    

     
        /// <summary>
     
    
   

    

     

    
    

     
        /// 发送消息
     
    
   

    

     

    
    

     
        /// </summary>
     
    
   

    

     

    
    

     
        /// <param name="windowReceiveTitle">接收方窗体标题名称</param>
     
    
   

    

     

    
    

     
        /// <param name="strData">要发送的数据</param>
     
    
   

    

     

    
    

     
        public static void Send(string windowReceiveTitle, string strData)
     
    
   

    

     

    
    

     

              {
     
    
   

    

     

    
    

     
            int winHandler = FindWindow(null, windowReceiveTitle);
     
    
   

    

     

    
    

     
            if (winHandler != 0)
     
    
   

    

     

    
    

     

                  {
     
    
   

    

     

    
    

     
                byte[] sarr = System.Text.Encoding.Default.GetBytes(strData);
     
    
   

    

     

    
    

     
                int len = sarr.Length + 1;
     
    
   

    

     

    
    

     

                      COPYDATASTRUCT cds;
     
    
   

    

     

    
    

     

                      cds.dwData = (IntPtr)100;
     
    
   

    

     

    
    

     

                      cds.lpData = strData;
     
    
   

    

     

    
    

     

                      cds.cbData = len;
     
    
   

    

     

    
    

     

                      SendMessage(winHandler, WM_COPYDATA, 0, ref cds);
     
    
   

    

     

    
    

     

                  }
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     
        /// <summary>
     
    
   

    

     

    
    

     
        /// 接收消息
     
    
   

    

     

    
    

     
        /// </summary>
     
    
   

    

     

    
    

     
        /// <example>
     
    
   

    

     

    
    

     
        /// 在窗体中覆盖接收消息函数
     
    
   

    

     

    
    

     
        /// protected override void DefWndProc(ref System.Windows.Forms.Message m)
     
    
   

    

     

    
    

     
        /// {
     
    
   

    

     

    
    

     
        /// switch(m.Msg)
     
    
   

    

     

    
    

     
        /// {
     
    
   

    

     

    
    

     
        /// case WinMessageHelper.WM_COPYDATA:
     
    
   

    

     

    
    

     
        /// string str = WinMessageHelper.Receive(ref m);
     
    
   

    

     

    
    

     
        /// break;
     
    
   

    

     

    
    

     
        /// default:
     
    
   

    

     

    
    

     
        /// base.DefWndProc(ref m);
     
    
   

    

     

    
    

     
        /// break;
     
    
   

    

     

    
    

     
        /// 
     
    
   

    

     

    
    

     
        /// }
     
    
   

    

     

    
    

     
        /// }
     
    
   

    

     

    
    

     
        /// </example>
     
    
   

    

     

    
    

     
        /// <returns>接收的到数据</returns>
     
    
   

    

     

    
    

     
        public static string Receive(ref System.Windows.Forms.Message m)
     
    
   

    

     

    
    

     

              {
     
    
   

    

     

    
    

     

                  COPYDATASTRUCT cds = new COPYDATASTRUCT();
     
    
   

    

     

    
    

     

                  Type cdsType = cds.GetType();
     
    
   

    

     

    
    

     

                  cds = (COPYDATASTRUCT)m.GetLParam(cdsType);
     
    
   

    

     

    
    

     
            return cds.lpData;
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
  
 

  
 
 

文章来源: zzzili.blog.csdn.net，作者：清雨小竹，版权归原作者所有，如需转载，请联系作者。

原文链接：zzzili.blog.csdn.net/article/details/115908192