使用copydata实现进程之间数据传递

Winform to Winfrom==>

发送端==》

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using System; using System.Runtime.InteropServices;   namespace CopyData.Sender {     public partial class Form1 : System.Windows.Forms.Form     {         const int WM_COPYDATA = 0x004A;         public struct COPYDATASTRUCT         {             public IntPtr dwData;             public int cbData;             [MarshalAs(UnmanagedType.LPStr)]             public string lpData;         }           public Form1()         {             InitializeComponent();         }           [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);           private void button1_Click(object sender, System.EventArgs e)         {             int WINDOW_HANDLER = FindWindow(null, @"Form1");             if (WINDOW_HANDLER == 0)             {             }             else             {                 byte[] sarr = System.Text.Encoding.Default.GetBytes(this.textBox1.Text);                 int len = sarr.Length;                 COPYDATASTRUCT cds;                 cds.dwData = (IntPtr)100;                 cds.lpData = this.textBox1.Text;                 cds.cbData = len + 1;                 SendMessage(WINDOW_HANDLER, WM_COPYDATA, 0, ref cds);             }         }     } }

接收端==》

 

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using System; using System.Runtime.InteropServices; using System.Windows.Forms;   namespace CopyData.Receiver {     public partial class Form1 : Form     {         public Form1()         {             InitializeComponent();         }           const int WM_COPYDATA = 0x004A;         //[StructLayout(LayoutKind.Sequential)]         public struct COPYDATASTRUCT         {             public IntPtr dwData;             public int cbData;             [MarshalAs(UnmanagedType.LPStr)]             public string lpData;         }           protected override void DefWndProc(ref System.Windows.Forms.Message m)         {             switch (m.Msg)             {                 //接收自定义消息 USER，并显示其参数                 case WM_COPYDATA:                     COPYDATASTRUCT mystr = new COPYDATASTRUCT();                     Type mytype = mystr.GetType();                       mystr = (COPYDATASTRUCT)m.GetLParam(mytype);                     this.textBox1.Text = mystr.lpData;                       break;                 default:                     base.DefWndProc(ref m);                     break;             }         }     }        }

运行效果如下：

注意：

int WINDOW_HANDLER = FindWindow(null, @"Form1"); —— 用于确定发送方发送数据到其他进程的某个标题为Form1的窗体。

 

2.delhpi程序与C#程序进行消息发送时，出现如下问题，解决思路？

 

a.安装.netframework

b.检查delphi以及C#程序（例如，delphi==>cdds.cbData := length(Edit1.Text)+1;cdds.lpData := pchar(Edit1.Text);)是否正确？

 

WPF to Winfrom to WPF==>

发送方： WPF to WinFrom

private void QueueCode(int queueType)
        {
            IntPtr hwnd = ((HwndSource)PresentationSource.FromVisual(this)).Handle;
            int sendHandle = hwnd.ToInt32();
            int WINDOW_HANDLER = FindWindow(null, @"Form1");
            if (WINDOW_HANDLER == 0)
            {
                StartQueueExe();
                WINDOW_HANDLER = FindWindow(null, @"Form1");
            }

            string queueName = this.cbQueue.Text;
            queueName = queueType + "^" + this.cbQueue.Text + "^" + sendHandle;
            if (WINDOW_HANDLER == 0) { }
            else
            {
                byte[] sarr = System.Text.Encoding.Default.GetBytes(queueName);
                int len = sarr.Length;
                COPYDATASTRUCT cds;
                cds.dwData = (IntPtr)100;
                cds.lpData = queueName;
                cds.cbData = len + 1;
                SendMessage(WINDOW_HANDLER, WM_COPYDATA, 0, ref cds);
            }

            var hwndSource = (HwndSource)HwndSource.FromVisual(this);
            hwndSource.AddHook(new HwndSourceHook(WndProc));
        }

        private void StartQueueExe()
        {
            string filePath = AppDomain.CurrentDomain.BaseDirectory + "TEST.exe";
            System.Diagnostics.Process p = new System.Diagnostics.Process();
            p.StartInfo.FileName = filePath;
            p.StartInfo.UseShellExecute = false;    //是否使用操作系统shell启动
            p.StartInfo.RedirectStandardInput = true;//接受来自调用程序的输入信息
            p.StartInfo.RedirectStandardOutput = true;//由调用程序获取输出信息
            p.StartInfo.RedirectStandardError = true;//重定向标准错误输出
            p.StartInfo.CreateNoWindow = true;//不显示程序窗口
            p.Start();//启动程序
            Thread.Sleep(500);
        }

        private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
        {
            switch (msg)
            {
                case WM_COPYDATA:
                    COPYDATASTRUCT mystr = new COPYDATASTRUCT();
                    Type mytype = mystr.GetType();
                    COPYDATASTRUCT cds = (COPYDATASTRUCT)Marshal
                        .PtrToStructure(lParam, typeof(COPYDATASTRUCT));
                    this.lblQueueMessage.Content = cds.lpData;
                    break;
                default: break;
            }
            return (System.IntPtr)0;
        }

 接收方：WinFrom获取

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#region 获取消息       /// <summary>       /// 0x004A       /// </summary>       const int WM_COPYDATA = 0x004A;       //[StructLayout(LayoutKind.Sequential)]       public struct COPYDATASTRUCT       {           public IntPtr dwData;           public int cbData;           [MarshalAs(UnmanagedType.LPStr)]           public string lpData;       }         protected override void DefWndProc(ref System.Windows.Forms.Message m)       {           try           {               switch (m.Msg)               {                   //  接收自定义消息 USER，并显示其参数                   case WM_COPYDATA:                       COPYDATASTRUCT mystr = new COPYDATASTRUCT();                       Type mytype = mystr.GetType();                       mystr = (COPYDATASTRUCT)m.GetLParam(mytype);                       ReceiveMessage = mystr.lpData;                       break;                   default:                       base.DefWndProc(ref m);                       break;               }           }           catch { return; }       }         #endregion

Winfrom to WPF

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private static string FormTitle = "Form1";         [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);   public bool SendMessage(int value, int queueType)         {             try             {                 StringBuilder content = new StringBuilder();                 if (value != 0)//没有全部被预约                 {                     // string appointTimes = DateTime.Now.ToLongTimeString().ToString();                     if (string.IsNullOrEmpty(CurrentDate)) CurrentDate = DateTime.Now.ToShortDateString();                     int num = DBQSQueueBusiness.GetCountByCondition(QueueId, CurrentDate);                       CurrentDate = DateTime.Parse(CurrentDate).ToString("yyyy-MM-dd");                     content.Append(CurrentDate);//日期                     content.Append("^");                     content.Append(CurrentTimePart);//描述appointTimes                     content.Append("^");                     content.Append(value);//号                     content.Append("^");                     content.Append(QueueId);//队列                     content.Append("^");                       if (queue == null) queue = new V_Queue();                     queue.ENROLDATE = CurrentDate;                     queue.APPOINTTIME = CurrentTimePart;//appointTimes                     queue.SORTNO = value;                 }                 else content.Append("0");                   //int WINDOW_HANDLER = FindWindow(null, @FormTitle);                 int WINDOW_HANDLER = int.Parse(FormTitle);                 if (WINDOW_HANDLER == 0) { }                 else                 {                     byte[] sarr = System.Text.Encoding.Default.GetBytes(content.ToString());                     int len = sarr.Length;                     COPYDATASTRUCT cds;                     cds.dwData = (IntPtr)100;                     cds.lpData = content.ToString();                     cds.cbData = len + 1;                     SendMessage(WINDOW_HANDLER, WM_COPYDATA, 0, ref cds);                 }             }             catch { return false; }             return true;         }

 

WPF 接收方：

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#region 定义常量消息值        public const int WM_GETTEXT = 0x0D;        public const int WM_SETTEXT = 0x0C;        public const int WM_SIZEING = 0x0214;        public const int WM_COPYDATA = 0x004A;        public const int WM_LBUTTONDBLCLK = 0x0203;        #endregion          #region 定义结构体       public struct COPYDATASTRUCT        {            public IntPtr dwData;            public int cbData;            [MarshalAs(UnmanagedType.LPStr)]            public string lpData;        }        #endregion          private void Window_Loaded(object sender, RoutedEventArgs e)        {            HwndSource hWndSource;            WindowInteropHelper wih = new WindowInteropHelper(this);            hWndSource = HwndSource.FromHwnd(wih.Handle);            //添加处理程序            hWndSource.AddHook(Test);        }        private IntPtr Test(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)        {            switch (msg)            {                               case WM_COPYDATA:                    {                          COPYDATASTRUCT mystr = new COPYDATASTRUCT();                        Type mytype = mystr.GetType();                          COPYDATASTRUCT MyKeyboardHookStruct = (COPYDATASTRUCT)Marshal.PtrToStructure(lParam, typeof(COPYDATASTRUCT));                         this.textbox.Text = MyKeyboardHookStruct.lpData;                        break;                      }                     default:                    {                             break;                    }                }            return IntPtr.Zero;        }