How to Execute Multiple DOS and MySQL Commands within a Single .NET Process?

Execute Multiple Command Lines with the Same Process Using .NET

In this post, we address the challenge of executing multiple commands without creating a new process for each. The goal is to initiate the DOS command shell, transition to the MySQL command shell, and execute a command seamlessly.

The initial code snippet provided attempted to achieve this using the ExecuteCommand method. However, to enhance efficiency and avoid creating multiple processes, a more refined approach is required.

The solution lies in redirecting standard input and utilizing a StreamWriter to channel commands into the existing process. Here's the revised code:

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("mysql -u root -p");
        sw.WriteLine("mypassword");
        sw.WriteLine("use mydb;");
    }
}

In this code, we create a Process object and configure it to use cmd.exe. By setting RedirectStandardInput to true, we enable the redirection of standard input. Then, we instantiate a StreamWriter object and use it to write commands directly into the input stream of the process.

This approach allows you to execute multiple commands within the same process, streamlining the flow of your application.

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