[英]Getting command line output dynamically
I'm running a program using command line in c# this program produce some logs while its running in need to display this logs whenever it get change. 我在c#中使用命令行运行一个程序,这个程序产生一些日志,而它运行时需要在它发生变化时显示这些日志。 I wrote the following code but it shows all the logs once the process has been killed and during the running time my program is not responding.
我写了下面的代码,但它显示了进程被杀死后的所有日志,并且在运行期间我的程序没有响应。 how can I fix it?
我该怎么解决?
regards 问候
ProcessStartInfo procStartInfo = new System.Diagnostics.ProcessStartInfo("cmd", "/c " + "C:\\server.py");
Process proc = new Process();
procStartInfo.WindowStyle = ProcessWindowStyle.Hidden;
procStartInfo.UseShellExecute = false;
procStartInfo.RedirectStandardOutput = true;
//procStartInfo.CreateNoWindow = true;
proc.StartInfo = procStartInfo;
proc.Start();
string output = proc.StandardOutput.ReadToEnd();
proc.WaitForExit(300);
LogstextBox.Text = output;
Edited: well, I tried to use OutputDataReceived
but it doesn't show any result, here is the changed code: 编辑:好吧,我尝试使用
OutputDataReceived
但它没有显示任何结果,这里是更改的代码:
{
//processCaller.FileName = @"ping";
//processCaller.Arguments = "4.2.2.4 -t"; this is working
processCaller.FileName = @"cmd.exe";
processCaller.Arguments = "/c c:\\server.py"; //this is not working
processCaller.StdErrReceived += new DataReceivedHandler(writeStreamInfo);
processCaller.StdOutReceived += new DataReceivedHandler(writeStreamInfo);
processCaller.Completed += new EventHandler(processCompletedOrCanceled);
processCaller.Cancelled += new EventHandler(processCompletedOrCanceled);
this.richTextBox1.Text = "Server Started.." + Environment.NewLine;
processCaller.Start();
}
private void writeStreamInfo(object sender, DataReceivedEventArgs e)
{
this.richTextBox1.AppendText(e.Text + Environment.NewLine);
}
This is the problem: 这就是问题:
string output = proc.StandardOutput.ReadToEnd();
You won't get to the "end" of standard output until the process has terminated. 在过程终止之前,您将无法达到标准输出的“结束”。
You should be reading a line at a time - or possibly just subscribing to the OutputDataReceived
event (and following the documented other requirements for that event). 您应该一次读一行 - 或者可能只是订阅
OutputDataReceived
事件(并遵循该事件记录的其他要求)。
EDIT: Here's sample code which works for me: 编辑:这是适用于我的示例代码:
using System;
using System.Diagnostics;
using System.Threading;
class Program
{
public static void Main()
{
ProcessStartInfo startInfo = new ProcessStartInfo("cmd", "/c " + "type Test.cs")
{
WindowStyle = ProcessWindowStyle.Hidden,
UseShellExecute = false,
RedirectStandardOutput = true,
CreateNoWindow = true
};
Process process = Process.Start(startInfo);
process.OutputDataReceived += (sender, e) => Console.WriteLine(e.Data);
process.BeginOutputReadLine();
process.WaitForExit();
// We may not have received all the events yet!
Thread.Sleep(5000);
}
}
Note that in your sample code, you're accessing the UI on whatever thread the OutputDataReceived
handler is called - that looks like a bad idea to me. 请注意,在您的示例代码中,您正在访问调用
OutputDataReceived
处理程序的任何线程上的UI - 这对我来说是个坏主意。
You can use the Process.BeginOutputReadLine Method . 您可以使用Process.BeginOutputReadLine方法 。 The link shows a complete working example in C# which uses the
OutputDataReceived event
. 该链接显示了C#中使用
OutputDataReceived event
的完整工作示例。 That code example should do what you want. 该代码示例应该做你想要的。
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