我要评论本文实例展示了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;
}
}
希望本文所述实例对大家c#程序设计有所帮助。
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