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本文实例展示了WinForm实现跨进程通信的方法，分享给大家供大家参考之用。具体方法如下：
主要功能代码如下：
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;
}
}
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希望本文所述实例对大家C#程序设计有所帮助。
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