C# program wait for response from called program

14y7kVisual Basic .NET

I have a C# 2008 console application that calls another C# console application using a process.start command. The second C# program calls a web service.
The first console application calls the second console application with calls in a specific order. This is required since the calls to the web service need to occur in a certain order.

Due to the facts that I just listed, I have the following questions to ask:
1. I would like to know how I can make the first program wait for a response from the second C# application. This wait need needs to occur before the next call is made to the web service.
2. Is there a way that I can pass the return code value from the web service (called by the second program) to the first program? If so, how would I accomplisht this goal?

Thus can you tell me and/or point me to a refernces on how I can accomplish my goals?

If this is not possibly, I do have a tracking database table setup for making certain each phase of the calls to the web service occur.

Let me know what you think the best solution would be.

5 Replies

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Ehtesham14y ago
i don't understand why you need to use an .exe for calling a web service why cant you use dll,
you can refer dll method to call a web service and get the returned value. That will be simple and right way to do it.

if you still want to go with .exe use ProcessInstanceObj.MainModule.GetType().GetMethod("YourMethodName").Invoke
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Nitesh Kejriwal14y ago
dc, what you can do is set the return type of 2nd console app to the same datatype that is retruned from web service. when you get the return value from web service in 2nd console app. return it to 1st console app and you're done.
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dc14y ago
Thank you for your answer so far!

Your code will work except, I want the return code of the web service that is called by the second console application. I do not care about the return code fromnthe second console application.

Thus can you tell me how first console application can obtain the return code from the web service that is called by the second console application?
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Ehtesham14y ago
In your first console application change the return type of Main
method,in the second console application make use of the below
code.

System.Diagnostics.Process p = new System.Diagnostics.Process();
p.StartInfo.UseShellExecute = false;
p.StartInfo.FileName = YOURFIRSTCONSOLEAPP.EXE;
p.Start();
//this will wait till your first console application finishes execution
p.WaitForExit();
int returnCode = p.ExitCode;

ExiCode property of Process class catches the return value of a
process.i.e in your case it will be process of first console
application

Hope this helps, Happy Coding :-)
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Nitesh Kejriwal14y ago
Question - Why are you calling a 2nd console application from 1st one. You could have written a function in your 2nd console app that calls the web service in specific order and then call this function on a specific param.
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