C#定位txt指定行的方法小例子

            [dllimport("user32.dll", entrypoint = "findwindow")]
            private static extern intptr findwindow(string lpclassname, string lpwindowname);
            [dllimport("user32.dll")]
            static extern intptr findwindowex(intptr hwndparent, intptr hwndchildafter, string lpszclass, string lpszwindow);
            [dllimport("user32.dll")]
            static extern bool setforegroundwindow(intptr hwnd);
            ///<summary>
            /// 定位到txt文件指定行
            ///</summary>
            ///<param name="strfullname">文件路径</param>
            ///<param name="strrow">指定行</param>
            ///<returns>定位是否成功</returns>
            private bool locatenotepad(string strfullname, string strrow)
            {
                int irow;
                int.tryparse(strrow, out irow);
                if (irow <= 0)
                {
                    return false;
                }
                intptr hwnd = findwindow("notepad", string.format("{0} - 记事本", path.getfilename(strfullname)));//查看当前文件是否已打开
                if (hwnd.toint32() == 0)
                {
                    process p = process.start(@"notepad.exe",strfullname);
                    p.waitforinputidle(1000);  //等一秒，等文本打开，焦点去到notepad
                    system.windows.forms.sendkeys.sendwait("{down " + (irow - 1) + "}");
                    system.windows.forms.sendkeys.sendwait("{home}"); //行首
                    system.windows.forms.sendkeys.sendwait("+{end}"); //选中当前行
                    return true;
                }
                else
                {
                    hwnd = findwindowex(hwnd, intptr.zero, "edit", string.empty);
                    if (hwnd.toint32() == 0) return false;
                    else
                    {
                        setforegroundwindow(hwnd);
                        system.windows.forms.sendkeys.sendwait("^{home}");//将光标定位到首行
                        system.windows.forms.sendkeys.sendwait("{down " + (irow - 1) + "}"); //
                        system.windows.forms.sendkeys.sendwait("{home}"); //行首
                        system.windows.forms.sendkeys.sendwait("+{end}"); //选中当前行
                    }
                }
                return true;
            }

调用代码 locatenotepad("d:\\test.txt","3");

代码很简单,通过findwindow,findwindowex,setforegroundwindow三个api进行获取句柄并设置进程当前以及发送系统命令操作,利用winform中的sendkeys发送键盘命令达到定位的目的.

ps:此命令需要增加 system.windows.forms,在引用处添加..希望对各位有帮助,也希望能得到各位朋友的指点改进,谢谢