如何从我的 .NET 应用程序调用控制台应用程序并捕获控制台中生成的所有输出?
(请记住,我不想先将信息保存在文件中,然后再重新列出,因为我很乐意接收它作为实时信息。)
使用ProcessStartInfo.RedirectStandardOutput属性可以很容易地实现这一点。完整的示例包含在链接的 MSDN 文档中;唯一需要注意的是,您可能还必须重定向标准错误流才能查看应用程序的所有输出。
Process compiler = new Process();
compiler.StartInfo.FileName = "csc.exe";
compiler.StartInfo.Arguments = "/r:System.dll /out:sample.exe stdstr.cs";
compiler.StartInfo.UseShellExecute = false;
compiler.StartInfo.RedirectStandardOutput = true;
compiler.Start();
Console.WriteLine(compiler.StandardOutput.ReadToEnd());
compiler.WaitForExit();
这比@mdb接受的答案有所改进。具体来说,我们还捕获过程的错误输出。此外,我们通过事件捕获这些输出,因为ReadToEnd()
如果您想同时捕获错误和常规输出,则无法正常工作。我花了一段时间才完成这项工作,因为它实际上还需要BeginxxxReadLine()
在Start()
.
异步方式:
using System.Diagnostics;
Process process = new Process();
void LaunchProcess()
{
process.EnableRaisingEvents = true;
process.OutputDataReceived += new System.Diagnostics.DataReceivedEventHandler(process_OutputDataReceived);
process.ErrorDataReceived += new System.Diagnostics.DataReceivedEventHandler(process_ErrorDataReceived);
process.Exited += new System.EventHandler(process_Exited);
process.StartInfo.FileName = "some.exe";
process.StartInfo.Arguments = "param1 param2";
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardError = true;
process.StartInfo.RedirectStandardOutput = true;
process.Start();
process.BeginErrorReadLine();
process.BeginOutputReadLine();
//below line is optional if we want a blocking call
//process.WaitForExit();
}
void process_Exited(object sender, EventArgs e)
{
Console.WriteLine(string.Format("process exited with code {0}\n", process.ExitCode.ToString()));
}
void process_ErrorDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine(e.Data + "\n");
}
void process_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine(e.Data + "\n");
}
创建控制台进程时,使用ProcessInfo.RedirectStandardOutput重定向输出。
然后您可以使用Process.StandardOutput来读取程序输出。
第二个链接有一个示例代码如何做到这一点。
ConsoleAppLauncher是一个专门为回答这个问题而设计的开源库。它捕获控制台中生成的所有输出,并提供简单的界面来启动和关闭控制台应用程序。
每次控制台将新行写入标准/错误输出时,都会触发 ConsoleOutput 事件。这些行排队并保证遵循输出顺序。
也可用作NuGet 包。
获取完整控制台输出的示例调用:
// Run simplest shell command and return its output.
public static string GetWindowsVersion()
{
return ConsoleApp.Run("cmd", "/c ver").Output.Trim();
}
带有实时反馈的示例:
// Run ping.exe asynchronously and return roundtrip times back to the caller in a callback
public static void PingUrl(string url, Action<string> replyHandler)
{
var regex = new Regex("(time=|Average = )(?<time>.*?ms)", RegexOptions.Compiled);
var app = new ConsoleApp("ping", url);
app.ConsoleOutput += (o, args) =>
{
var match = regex.Match(args.Line);
if (match.Success)
{
var roundtripTime = match.Groups["time"].Value;
replyHandler(roundtripTime);
}
};
app.Run();
}
我在O2 平台(开源项目)中添加了许多辅助方法,允许您通过控制台输出和输入轻松编写与另一个进程的交互脚本(请参阅http://code.google.com/p/o2platform/源/浏览/主干/O2_Scripts/APIs/Windows/CmdExe/CmdExeAPI.cs)
对您也有用的 API 可能允许查看当前进程的控制台输出(在现有控件或弹出窗口中)。有关更多详细信息,请参阅此博客文章:http: //o2platform.wordpress.com/2011/11/26/api_consoleout-cs-inprocess-capture-of-the-console-output/(此博客还包含有关如何使用的详细信息新进程的控制台输出)
我制作了一个响应式版本,它接受 stdOut 和 StdErr 的回调。
onStdOut
并在
数据到达后(在进程退出之前)onStdErr
被异步调用。
public static Int32 RunProcess(String path,
String args,
Action<String> onStdOut = null,
Action<String> onStdErr = null)
{
var readStdOut = onStdOut != null;
var readStdErr = onStdErr != null;
var process = new Process
{
StartInfo =
{
FileName = path,
Arguments = args,
CreateNoWindow = true,
UseShellExecute = false,
RedirectStandardOutput = readStdOut,
RedirectStandardError = readStdErr,
}
};
process.Start();
if (readStdOut) Task.Run(() => ReadStream(process.StandardOutput, onStdOut));
if (readStdErr) Task.Run(() => ReadStream(process.StandardError, onStdErr));
process.WaitForExit();
return process.ExitCode;
}
private static void ReadStream(TextReader textReader, Action<String> callback)
{
while (true)
{
var line = textReader.ReadLine();
if (line == null)
break;
callback(line);
}
}
以下将运行executable
并args
打印
到控制台。
RunProcess(
executable,
args,
s => { Console.ForegroundColor = ConsoleColor.White; Console.WriteLine(s); },
s => { Console.ForegroundColor = ConsoleColor.Red; Console.WriteLine(s); }
);
来自PythonTR - Python Programcıları Derneği、e-kitap、örnek:
Process p = new Process(); // Create new object
p.StartInfo.UseShellExecute = false; // Do not use shell
p.StartInfo.RedirectStandardOutput = true; // Redirect output
p.StartInfo.FileName = "c:\\python26\\python.exe"; // Path of our Python compiler
p.StartInfo.Arguments = "c:\\python26\\Hello_C_Python.py"; // Path of the .py to be executed
添加process.StartInfo.**CreateNoWindow** = true;
和timeout
。
private static void CaptureConsoleAppOutput(string exeName, string arguments, int timeoutMilliseconds, out int exitCode, out string output)
{
using (Process process = new Process())
{
process.StartInfo.FileName = exeName;
process.StartInfo.Arguments = arguments;
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.CreateNoWindow = true;
process.Start();
output = process.StandardOutput.ReadToEnd();
bool exited = process.WaitForExit(timeoutMilliseconds);
if (exited)
{
exitCode = process.ExitCode;
}
else
{
exitCode = -1;
}
}
}