如何在多行TextBox上打印ping.exe的进度？

Question

我有一个文本框和一个按钮.该按钮调用Ping(),我希望显示ping的任何进度textBox1.

        void Ping()
        {
            p = new Process();
            p.StartInfo.FileName = "ping";
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.Arguments = "www.microsoft.com";
            p.Start();
            textBox1.Text = p.StandardOutput.ReadToEnd();
            p.WaitForExit();
        }

怎么实现呢？我上面写的当前实现并未显示进度,而是显示最终输出.

Answer 1

async void Test()
{
    await Ping("www.google.com");
}


Task Ping(string host)
{
    var tcs = new TaskCompletionSource<object>();

    ProcessStartInfo psi = new ProcessStartInfo();
    psi.FileName = "ping.exe";
    psi.UseShellExecute = false;
    psi.RedirectStandardOutput = true;
    psi.Arguments = host;

    var proc = Process.Start(psi);

    proc.OutputDataReceived += (s, e) => {
            Action action = () => textBox1.Text += e.Data + Environment.NewLine;
            this.Invoke(action);
        };

    proc.Exited += (s, e) => tcs.SetResult(null);

    proc.EnableRaisingEvents = true;
    proc.BeginOutputReadLine();

    return tcs.Task;
}

结果

Pinging www.google.com [64.15.117.154] with 32 bytes of data:
Reply from 64.15.117.154: bytes=32 time=50ms TTL=55
Reply from 64.15.117.154: bytes=32 time=45ms TTL=55
Reply from 64.15.117.154: bytes=32 time=45ms TTL=55
Reply from 64.15.117.154: bytes=32 time=46ms TTL=55

Ping statistics for 64.15.117.154:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 45ms, Maximum = 50ms, Average = 46ms

话虽如此,我会使用Ping该类而不是启动外部应用程序

var ping = new System.Net.NetworkInformation.Ping();
var pingReply = await ping.SendPingAsync("www.google.com");
Console.WriteLine("{0} {1} {2}",pingReply.Address, 
                                pingReply.RoundtripTime, 
                                pingReply.Status);