C# 通过 OutputDataReceived 事件捕获进程输出
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Capturing process output via OutputDataReceived event
提问by Boris
I'm trying to capture process output in "realtime" (while it's running). The code I use is rather simple (see below). For some strange reason the OutputDataReceived event is never called. Why?
我正在尝试“实时”（在运行时）捕获进程输出。我使用的代码相当简单（见下文）。由于某种奇怪的原因，从未调用 OutputDataReceived 事件。为什么？
private void button2_Click(object sender, EventArgs e)
{
// Setup the process start info
var processStartInfo = new ProcessStartInfo("ping.exe", "-t -n 3 192.168.100.1")
{
UseShellExecute = false,
RedirectStandardOutput = true
};
// Setup the process
mProcess = new Process { StartInfo = processStartInfo, EnableRaisingEvents = true };
// Register event
mProcess.OutputDataReceived += OnOutputDataReceived;
// Start process
mProcess.Start();
mProcess.WaitForExit();
}
void OnOutputDataReceived(object sender, DataReceivedEventArgs e)
{
//Never gets called...
}
采纳答案by Chris
You need to call
你需要打电话
mProcess.BeginOutputReadLine();
BeginOutputReadLine- "Begins asynchronous read operations on the redirected StandardOutput stream of the application."
BeginOutputReadLine- “在应用程序的重定向 StandardOutput 流上开始异步读取操作。”
回答by guest1
void ExecuteCommand(string cmdpath, string cmdargs)
{
string command = cmdpath + " " + cmdargs;
tabc_results.SelectTab(1);
DoConsole("\r\nCmd>> " + command + "\r\n");
var processInfo = new System.Diagnostics.ProcessStartInfo("cmd.exe", "/c " + command);
processInfo.CreateNoWindow = true;
processInfo.UseShellExecute = false;
processInfo.RedirectStandardError = true;
processInfo.RedirectStandardOutput = true;
var process = System.Diagnostics.Process.Start(processInfo);
process.OutputDataReceived += (
object sender, System.Diagnostics.DataReceivedEventArgs e
) => DoConsole("stdout>> " + e.Data + "\r\n");
//Console.WriteLine("output>>" + e.Data);
process.BeginOutputReadLine();
process.ErrorDataReceived += (
object sender, System.Diagnostics.DataReceivedEventArgs e
) =>DoConsole("stderr>> " + e.Data + "\r\n");
//Console.WriteLine("error>>" + e.Data);
process.BeginErrorReadLine();
process.WaitForExit();
DoConsole("retcode>> " + process.ExitCode.ToString() + "\r\n");
//Console.WriteLine("ExitCode: {0}", process.ExitCode);
process.Close();
}
