C#调用cmd并实时返回数据方法,例如ping时,如图,

   this.tabControl1.SelectedTab = tabPage3;
Process proc = new Process();
proc.StartInfo.FileName = "cmd.exe";
//proc.StartInfo.WorkingDirectory =
proc.StartInfo.CreateNoWindow = true;
proc.StartInfo.UseShellExecute = false;
proc.StartInfo.RedirectStandardOutput = true;
proc.StartInfo.RedirectStandardError = true;
proc.StartInfo.RedirectStandardInput = true;
proc.Start();
proc.StandardInput.WriteLine("tcping " + pingstr + " 80");
    proc.StandardInput.WriteLine("exit");
    StreamReader reader = proc.StandardOutput;
string line = reader.ReadLine();
while (!reader.EndOfStream)
{
        this.textBox2.AppendText(line + "\r\n");
        this.textBox2.SelectionStart = this.textBox2.Text.Length;
        this.textBox2.ScrollToCaret();
        line = reader.ReadLine();
    }
    proc.WaitForExit();
    proc.Close();
    reader.Close();