I wrote program that listens on a directory (GUI - WPF). When the new file show up in this directory is sent to the printer. The problem occurs when I try to save a large file to this directory. I have to wait until the file is closed, and then send it to the printer. I have a function that checks if the file is open. But when I use it in the whole GUI hangs. How do I use this function asynchronously?
protected void newfile(object fscreated, FileSystemEventArgs Eventocc)
{
try
{
string CreatedFileName = Eventocc.Name;
FileInfo createdFile = new FileInfo(CreatedFileName);
string extension = createdFile.Extension;
string eventoccured = Eventocc.ChangeType.ToString();
fsLastRaised = DateTime.Now;
this.Dispatcher.Invoke((Action)(() =>
{
String file = "";
file = watchingFolder + "\\" + CreatedFileName;
//printing
this.Dispatcher.Invoke((Action)(() =>
{
FileInfo info = new FileInfo(file);
while (!IsFileReady(info)) { }
var t = new Thread(() => printFile(file, extension)); //send to printer
t.Start();
}));
}));
}
}
catch (Exception ex)
{
System.Windows.Forms.MessageBox.Show("Error");
}
}
IsFileReady function:
public static bool IsFileReady(FileInfo file)
{
FileStream stream = null;
try
{
stream = file.Open(FileMode.Open, FileAccess.Read, FileShare.None);
}
catch (IOException)
{
//the file is unavailable because it is:
//still being written to
//or being processed by another thread
//or does not exist (has already been processed)
return true;
}
finally
{
if (stream != null)
stream.Close();
}
//file is not locked
return false;
}
And printfile
public void printFile(string filepath, string ext)
{
ProcessStartInfo info = new ProcessStartInfo();
info.Verb = "print";
info.FileName = filepath;
info.CreateNoWindow = true;
info.WindowStyle = ProcessWindowStyle.Hidden;
Process p = new Process();
p.StartInfo = info;
p.Start();
p.WaitForInputIdle();
System.Threading.Thread.Sleep(3000);
if (false == p.CloseMainWindow())
p.Kill();
}
}
How can I correct this code to work with large files without hangs up?
EDIT:
For check new file I use FileSystemWatcher
private void start(object sender, RoutedEventArgs e)
{
if (watchingFolder == null)
{
}
else
{
fs = new FileSystemWatcher(watchingFolder, "*.*");
fs.EnableRaisingEvents = true;
fs.IncludeSubdirectories = true;
fs.Created += new FileSystemEventHandler(newfile);
btnSatrt.IsEnabled = false;
btnStop.IsEnabled = true;
}
}
You're executing while (!IsFileReady(info)) { } through Dispatcher.Invoke, that executes the code on the UI thread so it will block for sure the app.
You aren't interacting at all with the UI, so the correct approach is to execute it asynchronously, via Tasks and awaits or with a background thread via the ThreadPool and not using at all Dispatcher.Invoke.
Try to execute all code in the newfile event handler on a background thread by starting a new task:
protected async void newfile(object fscreated, FileSystemEventArgs Eventocc)
{
try
{
await Task.Run(() =>
{
string CreatedFileName = Eventocc.Name;
FileInfo createdFile = new FileInfo(CreatedFileName);
string extension = createdFile.Extension;
string eventoccured = Eventocc.ChangeType.ToString();
fsLastRaised = DateTime.Now;
string file = watchingFolder + "\\" + CreatedFileName;
FileInfo info = new FileInfo(file);
while (!IsFileReady(info)) { }
printFile(file, extension);
});
}
catch (Exception ex)
{
System.Windows.Forms.MessageBox.Show("Error");
}
}
Use a BackgroundWorker instead of Dispatcher.Invoke.
Related
I am trying to efficiently open-close-reopen a power bi file (.pbix) from a WPF application button click. My method starts by creating a process that opens the pbix file then kills the process when the file is closed and then when the button is clicked again creates a new process to re-open the file.
Kindly find below the code I use to execute the steps above.
namespace TestApp
{
public class MainWindowViewModel : INotifyPropertyChanged
{
public int CheckFileIsOpen(string filenamepath)
{
try
{
using FileStream fs = new FileStream(filenamepath, FileMode.Open, FileAccess.ReadWrite, FileShare.None);
return 0;
}
catch (Exception)
{
WindowEffect = new BlurEffect();
Mouse.OverrideCursor = null;
bool? Result = new CustomMessageBox($"File: {filenamepath.Split(#"\").Last()} in use!\nClose it and try again.", "File used by another process", MessageType.Error, MessageButtons.Ok).ShowDialog(); //this is a MessageBox object
if (Result.Value)
{
WindowEffect = null;
return 1;
}
else
{
WindowEffect = null;
return 2;
}
}
}
private void OpenOnlineLocally(bool open_local)
{
Process p = new Process();
string copy_name = "File_Copy.pbix";
string path = AppDomain.CurrentDomain.BaseDirectory; //the directory the .exe file runs.
try
{
Mouse.OverrideCursor = Cursors.Wait;
if (open_local == true)
{
int IsPBIFileOpen = CheckFileIsOpen($#"{path}{copy_name}");
if (new[] { 1, 2 }.Contains(IsPBIFileOpen))
{
return;
}
//Open the file using the system process
p.StartInfo = new ProcessStartInfo($"{path}{copy_name}")
{
UseShellExecute = true
};
p.Start();
}
else
{
OpenUrl("https://app.powerbi.com/...");
}
}
finally
{
if (p.HasExited) { p.Kill(); } //kill the process if the user closed the .pbix file
}
}
public ICommand ExportPowerBICommand //binded to a button click command in xaml
{
get { return new DelegateCommand<object>(FuncExportPowerBI); }
}
public void FuncExportPowerBI(object parameter)
{
Mouse.OverrideCursor = Cursors.Wait;
try
{
OpenOnlineLocally(true);
}
finally
{
Mouse.OverrideCursor = null;
}
}
}
}
The above code generates this error in the finally statement:
System.InvalidOperationException: 'No process is associated with this object.'
Some notes after experimentation:
The process should be killed when the user closes the .pbix file (i.e. clicks the X icon on top right corner of the desktop app). If the process is not killed and the user re-clicks the button to re-open the file then I get an error that the file is already opened and used by another process.
I prefer to avoid a solution that uses process.WaitForExit(), for two reasons. First, the application freezes while the file is used by the user. Second, it takes a couple of seconds for the desktop to realize that the process has exited so it can kill() it (not time efficient).
Since you're running .NET 5, there's an asynchronous method Process.WaitForExitAsync(). Async operation will not block the UI.
I've made the changes to two methods
private async Task OpenOnlineLocally(bool open_local)
{
Process p = new Process();
string copy_name = "File_Copy.pbix";
string dir = AppDomain.CurrentDomain.BaseDirectory; //the directory the .exe file runs.
string path = Path.Combine(dir, copy_name);
try
{
if (open_local == true)
{
int IsPBIFileOpen = CheckFileIsOpen(path);
if (IsPBIFileOpen != 0)
{
return;
}
//Open the file using the system process
p.StartInfo = new ProcessStartInfo(path)
{
UseShellExecute = true
};
p.Start();
await p.WaitForExitAsync();
}
else
{
OpenUrl("https://app.powerbi.com/...");
}
}
finally
{
if (!p.HasExited) { p.Kill(); } //kill the process if the user closed the .pbix file
}
}
public async void FuncExportPowerBI(object parameter)
{
Mouse.OverrideCursor = Cursors.Wait;
try
{
await OpenOnlineLocally(true);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message); // handle possible exception here
}
Mouse.OverrideCursor = null;
}
I am using this code to monitor creation of files in certain folder:
_watcher = new RecoveringFileSystemWatcher(SourceFolder, "*.xml");
_watcher.Created += (_, e) =>
{
ProcessFile(e.Name);
};
RecoveringFileSystemWatcher is a fileSystemWatcher wrapper. It's constructor is:
public RecoveringFileSystemWatcher (string path, string filter)
{
_containedFSW = new FileSystemWatcher(path, filter);
}
The process works as expected but for some files, randomly, an exception is thrown telling that the file is used by another process.
This is the method that is launched upon file creation:
var nfo = new FileInfo(filePath);
if (nfo.Exists)
{
var archivoXml = nfo.Name;
string archivo = String.Empty;
try
{
string content = Task.Run(async () => await GetFileContent(filePath)).Result;
if (String.IsNullOrEmpty(content))
return false;
XmlDocument xml = new XmlDocument();
xml.LoadXml(content);
//The rest of the method
}
}
the method GetFileContent is this:
private async Task<string> GetFileContent(string filePath)
{
string content = String.Empty;
try
{
Console.Write("ONE - "); InfoLog.Save($"ONE {filePath}");
using (StreamReader sr = new StreamReader(filePath))
{
Console.Write("TWO - "); InfoLog.Save($"TWO {filePath}");
content = await sr.ReadToEndAsync().ConfigureAwait(false);
Console.Write($"THREE {(sr.BaseStream == null ? "Closed" : "Opened")} - "); InfoLog.Save($"THREE {(sr.BaseStream == null ? "Closed" : "Opened")} {filePath}");
sr.Close();
Console.WriteLine($"FOUR {(sr.BaseStream == null ? "Closed" : "Opened")}"); InfoLog.Save($"FOUR {(sr.BaseStream == null ? "Closed" : "Opened")} {filePath}");
}
}
catch (Exception ex)
{
InfoLog.Save($"XML file could be read -> {filePath}. See error log.");
ErrorLog.Save(ex);
}
return content;
}
Look at the log information I am writing to debug the process.
I got one case with a file called 1112186.xml.... this is recorded in the log:
18/12/2018 19:12:10 ONE D:\GestorDocumental\Origen\1112186.xml
18/12/2018 19:12:10 XML file could not be read -> D:\GestorDocumental\Origen\1112186.xml. See error log.
As you see, the exception is thrown at the "using" instruction.
If I see the full log, I can see that file, 1112186.xml, is never used before, so the only chance is that FSW keeps the file opened. I don't know why, but it seems this is happening.
It is clear also that this process is locking the file, because when I exit the console application and then run again, the file can be processed.
Any help about this, please?
thanks
Jaime
I usually use this method to check if file is locked. I got it from one of the link in stackoverflow.
public static bool IsFileClosed(string filepath)
{
bool fileClosed = false;
int retries = 20;
const int delay = 400; // set a delay period = retries*delay milliseconds
if (!File.Exists(filepath))
return false;
do
{
try
{
// Attempts to open then close the file in RW mode, denying other users to place any locks.
FileStream fs = File.Open(filepath, FileMode.Open, FileAccess.ReadWrite, FileShare.None);
fs.Close();
fileClosed = true; // success
}
catch (IOException) { }
retries--;
if (!fileClosed)
Thread.Sleep(delay);
}
while (!fileClosed && retries > 0);
return fileClosed;
}
This is a new class called FileTimerWatcher (it will have logger injected):
public FileTimerWatcher(ILogger logger) : base(logger)
{
if (timer == null)
{
// Create a timer with a 1.5 second interval.
// monitor the files after 1.5 seconds.
timer = new Timer(delay);
// Hook up the event handler for the Elapsed event.
timer.Elapsed += new ElapsedEventHandler(ProcessFolder);
timer.AutoReset = true;
timer.Enabled = true;
}
}
private void ProcessFolder(object sender, ElapsedEventArgs e)
{
var LastChecked = DateTime.Now;
string[] files = System.IO.Directory.GetFiles(SourceDirectory, somefilter, System.IO.SearchOption.TopDirectoryOnly);
foreach (string file in files)
{
ProcessFile(file); // process file here
}
}
I am working on a C# Form tool that will help me convert all of my phone and DSLR video to HEVC, currently, i have a program that uploads the photos and videos to different directories in my home server each time i connect to the WiFi. Once a month or so, i manually convert all the videos, but thought I would automate the process.. I have the Form working perfectly for processing 1 file. but get into trouble when processing a Directory (with possible sub-directories) all at once..
Sorry, this is long, just want to be thorough. here is the button calls
private void processFile_Click(object sender, EventArgs e)
{
OpenFileDialog file = new OpenFileDialog();
file.InitialDirectory = baseMediaDirectory;
if (file.ShowDialog() == DialogResult.OK)
{
ProcessSinlgeFile(file.FileName);
}
}
(above)for one file and (below) for a directory
private void processDirectory_Click(object sender, EventArgs e)
{
FolderBrowserDialog file = new FolderBrowserDialog();
file.SelectedPath = baseMediaDirectory;
if(file.ShowDialog() == DialogResult.OK)
{
ProcessDirectoryOfFiles(file.SelectedPath);
}
}
private void ProcessDirectoryOfFiles(string selectedPath)
{
List<string> listOfFiles = GetAllFiles(selectedPath);
foreach (string s in listOfFiles)
{
ProcessSinlgeFile(s);
}
}
both ultimately call this method, to do some checks and setup
private void ProcessSinlgeFile(string fileName)
{
if (IsAcceptableMediaFile(fileName))
{
outputWindow.AppendText("File to Process: " + fileName);
processMediaFile =
new MediaFileWrapper(this.outputWindow, new MediaFile(fileName), new NReco.VideoInfo.FFProbe());
if (processMediaFile.OkToProcess)
{
int initialCRFValue = 15;
//ultrafast superfast veryfast faster fast medium slow slower veryslow placebo
string intialSpeed = "veryfast";
try {
ConvertToMPEG(processMediaFile.getFFMPEGCommand(initialCRFValue, intialSpeed), processMediaFile);
}
catch
{
// at somepoint, we'll catch a bad file size (or compression)
// then change the CRF value and/or compression speed
}
}
}
}
ultimately I get to this Method and run into trouble.
private async void ConvertToMPEG(string arguments, MediaFileWrapper processMediaFile)
{
startTime = DateTime.Now;
watch = new Stopwatch();
watch.Start();
progressBar1.Minimum = 0;
progressBar1.Maximum = processMediaFile.GetTotalMilliseconds();
// Start the child process.
p = new Process();
//Setup filename and arguments
outputWindow.AppendText("ffmpeg " + arguments);
p.StartInfo.Arguments = arguments;
p.StartInfo.FileName = "ffmpeg.exe";
p.StartInfo.UseShellExecute = false;
// Redirect the output stream of the child process.
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.RedirectStandardInput = true;
// capture the date for stdout and std error
// note FFMPEG uses Stderr exclusively
p.ErrorDataReceived += new DataReceivedEventHandler(ErrorDataReceived);
p.OutputDataReceived += new DataReceivedEventHandler(OutputDataReceived);
// Hide Console Window
p.StartInfo.CreateNoWindow = true;
p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
p.Start();
p.BeginErrorReadLine();
p.BeginOutputReadLine();
await p.WaitForExitAsync();
}
and WaitForExitAsync is in another class because in can not be in here with a Form
public static Task WaitForExitAsync(this Process process,
CancellationToken cancellationToken = default(CancellationToken))
{
var tcs = new TaskCompletionSource<object>();
process.EnableRaisingEvents = true;
process.Exited += (sender, args) => tcs.TrySetResult(null);
if (cancellationToken != default(CancellationToken))
cancellationToken.Register(tcs.SetCanceled);
return tcs.Task;
}
however, single files work fine, when I call a directory through, it continuously starts processes for each file, trying to run them all at the same time. You can see I tried implementing this
process.WaitForExit() asynchronously
with no luck.
I want to perform some command lines to display the result after each input.
Process p = new Process();
ProcessStartInfo info = new ProcessStartInfo();
info.FileName = "cmd.exe";
info.RedirectStandardInput = true;
info.UseShellExecute = false;
p.StartInfo = info;
p.Start();
using (StreamWriter sw = p.StandardInput)
{
if (sw.BaseStream.CanWrite)
{
sw.WriteLine("ftp");
//output
sw.WriteLine("open ftp.server.com");
//output
sw.WriteLine("username");
//output
sw.WriteLine("password");
//output
}
}
Help me to understand how to make the output result after each sw.WriteLine(...)?
Updated
It is not working with ftp. Why?
Initialization:
Test test = new Test();
test.start();
Console.ReadKey();
Class Test:
class Test
{
static StringBuilder StdOutput = new StringBuilder();
Process p = null;
Queue<string> cmdQueue = new Queue<string>();
public void start(){
cmdQueue = new Queue<string>();
cmdQueue.Enqueue("cd c:\\");
cmdQueue.Enqueue("dir");
cmdQueue.Enqueue("ftp");
cmdQueue.Enqueue("open us1.hostedftp.com");
cmdQueue.Enqueue("z3r9#ya.ru");
cmdQueue.Enqueue("123456");
cmdQueue.Enqueue("dir");
setupProcess();
startProcess();
}
private void setupProcess()
{
p = new Process();
ProcessStartInfo info = new ProcessStartInfo();
info.FileName = "cmd";
info.CreateNoWindow = true;
info.RedirectStandardOutput = true;
info.RedirectStandardInput = true;
info.UseShellExecute = false;
p.OutputDataReceived += new DataReceivedEventHandler(OutputDataHandler);
StdOutput = new StringBuilder();
p.StartInfo = info;
}
private async void startProcess()
{
p.Start();
p.BeginOutputReadLine();
using (StreamWriter sw = p.StandardInput)
{
if (sw.BaseStream.CanWrite)
{
while (cmdQueue.Count > 0)
{
string cmd = cmdQueue.Dequeue();
if (cmd != null & cmd != "")
{
await sw.WriteLineAsync(cmd);
Thread.Sleep(100);
//System.Console.WriteLine(StdOutput);
}
else
{
break;
}
}
Console.WriteLine(StdOutput);
}
p.WaitForExit();
}
}
private static void OutputDataHandler(object sendingProcess, DataReceivedEventArgs outLine)
{
if (!String.IsNullOrEmpty(outLine.Data))
{
StdOutput.Append(Environment.NewLine + outLine.Data);
//System.Console.WriteLine(Environment.NewLine + outLine.Data);
}
}
}
I assume that you are actually asking about how to catch outputs from all the commands you want to have executed in the (one) process.
Here is a version of a solution I came up with a long time ago, when I was a rookie here..
The trick is to collect the output as is comes along by listening to events the Process will trigger whenever output gets created: OutputDataReceived and ErrorDataReceived. We need to run things async for this to work, so it will look a little more complicated than the usual examples, which only have one process executing one command..:
First a few variables:
Queue<string> cmdQueue = new Queue<string>();
static StringBuilder StdOutput = new StringBuilder();
static StringBuilder ErrOutput = new StringBuilder();
Process p = null;
Task processTask = null;
bool processIsRunning = false;
Here is a button click event that starts processing all commands from a multiline TextBox. Output gets collected in the two StringBuilders; when the queue is empty, I wait a little longer..:
private void button1_Click(object sender, EventArgs e)
{
cmdQueue = new Queue<string>(tb_commands.Lines.ToList());
setupProcess();
startProcessTask();
while (cmdQueue.Count > 0) Thread.Sleep(100);
Thread.Sleep(500);
tb_out.AppendText(StdOutput + "\r\n" + ErrOutput + "\r\n");
}
Here is the routine that set up the Process. Here we register two events that will notify us when there are lines in the output streams..:
private void setupProcess()
{
p = new Process();
ProcessStartInfo info = new ProcessStartInfo();
info.FileName = "cmd.exe";
info.CreateNoWindow = true;
info.RedirectStandardOutput = true;
info.RedirectStandardError = true;
info.RedirectStandardInput = true;
info.UseShellExecute = false;
p.OutputDataReceived += new DataReceivedEventHandler(OutputDataHandler);
p.ErrorDataReceived += new DataReceivedEventHandler(ErrorDataHandler);
StdOutput = new StringBuilder();
ErrOutput = new StringBuilder();
p.StartInfo = info;
}
After the setup we can start a Task that will start our Process asynchonously..:
private void startProcessTask()
{
var task = Task.Factory.StartNew(() => startProcess());
processTask = task;
}
..and finally here is the async method that after starting the Process and beginning with the asynchronous read operations on the redirected streams, keeps feeding it all lines from the command queue.
private async void startProcess()
{
try { p.Start(); processIsRunning = true; } catch
{
ErrOutput.Append("\r\nError starting cmd process.");
processIsRunning = false;
}
p.BeginOutputReadLine();
p.BeginErrorReadLine();
using (StreamWriter sw = p.StandardInput)
{
if (sw.BaseStream.CanWrite)
do
{
try
{
string cmd = cmdQueue.Dequeue();
if (cmd != null & cmd != "") await sw.WriteLineAsync(cmd);
} catch { }
} while (processIsRunning);
try { p.WaitForExit(); } catch { ErrOutput.Append("WaitForExit Error.\r\n"); }
}
}
The last pieces are the two events we have registered for reading the output from the two streams and adding them to the StringBuilders:
private static void OutputDataHandler(object sendingProcess, DataReceivedEventArgs outLine)
{
if (!String.IsNullOrEmpty(outLine.Data))
{
StdOutput.Append(Environment.NewLine + outLine.Data);
}
}
private static void ErrorDataHandler(object sendingProcess, DataReceivedEventArgs outLine)
{
if (!String.IsNullOrEmpty(outLine.Data))
{
ErrOutput.Append(Environment.NewLine + outLine.Data);
}
}
Note that this works fine for all sorts of commands you can feed into the process, including FTP. Here I change my codepage, show the images I have before, log in to an FTP server, call up the help page, cd and dir, download an image, close the connection and check the images I have now..:
One Caveat: There must be something wrong in the way I wrote this, as VS keeps complaining about a System.InvalidOperationException and the exe file hogs ~10% cpu. Helping me out would be very much appreciated..
I'm making a simple program in C# that allows a client to connect to a server and run MS DOS commands on that server.
The program worked well, later on I decided I wanted to cmd.exe process to run whilst the client was connected to the server, this is where I'm stuck at. I wanted this so that I could
run commands like CD and change the working directory, previously this would've had no effect because the cmd.exe process was closed after the command was run.
It appears that I can only read from the StandardOutput and StandardError streams if the process has exited, is there any workaround for this?
Here's some of my code used in the program :
*Creates and returns cmd.exe process: *
private Process createDOS()
{
try
{
// Create a ProcessStartInfo class
ProcessStartInfo startInfo = new ProcessStartInfo("cmd","");
// Set up the values
startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
startInfo.UseShellExecute = false;
startInfo.RedirectStandardOutput = true;
startInfo.RedirectStandardError = true;
startInfo.RedirectStandardInput = true;
startInfo.CreateNoWindow = false;
// Create a cmd.exe process
Process process = new Process();
// Apply the start info and run
process.StartInfo = startInfo;
process.Start();
return process;
}
catch (Exception)
{
return null;
}
}
Method that formats the response into a string :
private string findResponse(StreamReader err,StreamReader outp)
{
string output = outp.ReadToEnd();
string error = err.ReadToEnd();
string ret = "";
// Add the output to the return field if the process actually output data
if (output.Length > 0)
{
ret = "OUTPUT : " + output;
}
// Then attempt to add data from the error stream
if (error.Length > 0)
{
// If output was read, add a newline character separating the two fields
if (ret.Length > 0) ret = ret + Environment.NewLine;
ret = ret + "ERROR : " + error;
}
// If there's no output, that means there's no error, which means the execution was silently succesful
if (ret.Length <= 0)
{
ret = "Command execution succesful!";
}
return ret;
}
Server listener block :
private void run()
{
while (true)
{
Stream stream = null;
StreamReader sr = null;
StreamWriter sw = null;
Socket socket = null;
Process proc = null;
try
{
socket = server.AcceptSocket();
stream = new NetworkStream(socket);
sr = new StreamReader(stream);
sw = new StreamWriter(stream);
String mode = sr.ReadLine();
sw.WriteLine("Serverside link connected");
sw.Flush();
// Create cmd process in WINPROCESS mode
if (mode == "WINPROCESS")
{
proc = createDOS();
}
String line;
while ((line = sr.ReadLine()) != null)
{
if (mode == "WINPROCESS")
{
proc.StandardInput.WriteLine(line);
proc.StandardInput.Flush();
// Response
sw.WriteLine(findResponse(proc.StandardError, proc.StandardOutput));
sw.Flush();
}
else
{
sw.WriteLine(exeDOS(line));
sw.Flush();
}
}
}
catch (Exception ex)
{
// Silence
}
finally
{
if (socket != null) socket.Close();
if (stream != null) stream.Close();
if (sw != null) sw.Close();
if (sr != null) sr.Close();
if (proc != null) proc.Close();
}
}
}
Any help would be appreciated, thanks!
You need to add a handler to the OutputDataReceived and ErrorDataReceived events:
process.StartInfo.RedirectStandardOutput = true;
process.OutputDataReceived +=
new DataReceivedEventHandler(process_OutputDataReceived);
process.StartInfo.RedirectStandardError = true;
process.ErrorDataReceived +=
new DataReceivedEventHandler(process_ErrorDataReceived);
if (process.Start())
{
process.BeginOutputReadLine();
process.BeginErrorReadLine();
process.WaitForExit();
}
}
void process_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine(e.Data);
}
void process_ErrorDataReceived(object sender, DataReceivedEventArgs e)
{
Console.WriteLine(e.Data);
}