How to pass parameter to an Exe

When building desktop applications, you often need to pass data between different programs. Fortunately, there is a common method for passing parameters to an executable (.exe) whether you are using WPF or Windows Forms. By leveraging command-line arguments, you can trigger specific behaviors or load specific data into your application upon startup. Below, I’ll show you the universal way to implement this.

1. Add reference System.Diagnostics your class.                                                             

2. Then need start process.                                                                                    

                                                                                          ProcessStartInfo processStrInfo = new ProcessStartInfo();
              processStrInfo.FileName =   /// Exe path;
              processStrInfo.Arguments =  /// Parameter to pass as string;
              processStrInfo.UseShellExecute = false;
              Process.Start(processStrInfo);                                                                                                              

3. parameter can send as string.

           string tempCommandArgs ="TestPara";                 

             ProcessStartInfo processStrInfo = new ProcessStartInfo();
             processStrInfo.FileName = "test.exe";  /// Exe path;
             processStrInfo.Arguments = tempCommandArgs  /// Parameter to pass as string;

             processStrInfo.UseShellExecute = false;
             Process.Start(processStrInfo);   

4 .When we passing multiple parameter, we can use space between parameters .

          tempCommandArgs  =COMPANYNAME +" "+USERID

5. If parameter value have spaces.

When a parameter contains spaces—for example, a company name like 'Test Company'—you must wrap the string in double quotes. This ensures the operating system treats the entire phrase as a single argument. In your code, you can achieve this by adding a double-quote character at the start and end of the parameter string."

   

    In this time we can use below method (add stroke to start of parameter and end of parameter)

    tempCommandArgs  ="\"" + COMPANYNAME + "\"" + " "

                                                  +"\"" + USERlOGINNAME. + "\"";    

Note:-

This is way to pass parameter to Exe as argument , But running exe from another running application (exe) is not good practice. It will consume some more memory

Now take a look at how to consume passed argument form exe.

Note:-
This example I have done with WPF application

1. We can override OnStartup in App.xaml.cs

 protected override void OnStartup(StartupEventArgs e)
  {          
            string[] args = Environment.GetCommandLineArgs();
            args = e.Args;
         
            if (args.Count() > 0)
            {            
                COMPANYNAME = args[0];        
                USERNAME = args[1];
            }

 }