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Hello guys, I already have a project created and consolidated, and I'm creating another project. I need to call the second project from the first one, passing a parameter, and the actions I do in the second project must be passed on to the first one.

Example. Project A calls Project B... waits for the user to close B, and whatever the user enters into B's textbox, it will return to project A.


What I have tried:

Project A
private void button1_Click(object sender, EventArgs e)
        {
            
            string cPath = @"C:\Users\test";
            string filename = Path.Combine(cPath, "WinFormsApp3.exe");
            var proc = System.Diagnostics.Process.Start(filename, textBox1.Text, null, null, null);
            proc.CloseMainWindow();
            proc.Close();
        }


Project B

static void Main(string test)
        {
            if (string.IsNullOrWhiteSpace(test))
            {
                string arg1 = test;

                Application.SetHighDpiMode(HighDpiMode.SystemAware);
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new Project2(arg1));
            }
            else
            {
                Application.SetHighDpiMode(HighDpiMode.SystemAware);
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new Project2());
            }
        }
Posted
Updated 20-Oct-21 1:44am
Comments
BillWoodruff 19-Oct-21 11:58am    
"the actions I do in the second project must be passed on to the first one."

is having two processes (.exe) running a requirement /

In project B you can use the Program class Main(string[] args) method for this.
See: https://www.dotnetperls.com/main[^]
The examples are for a console application, but you can use this for a forms application too.
 
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v2
Comments
BillWoodruff 20-Oct-21 6:37am    
OP: "actions I do in the second project must be passed on to the first one."

Your answer is good, but it doesn't address the two-way interaction between processes the OP describes. Of course, that is a very advanced topic !
RickZeeland 20-Oct-21 12:34pm    
That's right, I did not want to mention named pipes and stuff like that :)
BillWoodruff 20-Oct-21 12:41pm    
i respect that choice :)
"actions I do in the second project must be passed on to the first one."

Two-way interaction between processes (IPC) is a very advanced topic ! [^], and will take time and effort to implement.

Also see: [^]
 
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