C＃运行没有新窗口的批处理脚本，并将所有（标准/错误）输出重定向到RichTextBox

Question

I have a batch script that launches the mariadb in console mode, so it looks likes this:

run-mariadb.bat

@echo off
cd /D mariadb-10.1.14-win32\bin && mysqld.exe --console
@pause

Using a C# WinForm app, I'd like to launch this batch script and get all output onto a RichTextBox.

This is the code I have so far:

// Configure db server process
Process dbServer = new Process();
dbServer.StartInfo.FileName = "cmd";
dbServer.StartInfo.Arguments = "/c start /wait run-mariadb.bat";
dbServer.StartInfo.CreateNoWindow = true;
dbServer.StartInfo.UseShellExecute = false;
dbServer.StartInfo.RedirectStandardOutput = true;
dbServer.StartInfo.RedirectStandardError = true;
dbServer.OutputDataReceived += new DataReceivedEventHandler(HandleDBServerOutput);
dbServer.ErrorDataReceived += new DataReceivedEventHandler(HandleDBServerOutput);

These are my helper methods:

string FormatOutput(string message)
{
    return string.Format("[ {0} ] : {1}",
        DateTime.Now.ToShortTimeString(),
        message);
}

void HandleDBServerOutput(object sender, DataReceivedEventArgs e)
{
    this.BeginInvoke(new MethodInvoker(() =>
    {
        if (!string.IsNullOrEmpty(e.Data))
            dbLogsRTB.AppendText(FormatOutput(e.Data));
    }));
}

I start the process like this:

// Start database server
dbServer.Start();
dbServer.BeginOutputReadLine();
dbServer.WaitForExit();

When the above executes, a new command prompt window is created and the mariadb is running in there. Any ideas why dbServer.StartInfo.CreateNoWindow = true; is being ignored?

Answer 1

The help for start starts off with:

Starts a separate window to run a specified program or command.

In other words, by running start as part of your command, you'll launch a new window. You can verify this by running start /wait run-mariadb.bat from a command prompt. It launches a new window to run the command.

Consider changing your command to be simply:

dbServer.StartInfo.Arguments = "/c run-mariadb.bat";

To just run the command without starting a new console process.