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New Message on BDOTNET
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From: SitaramanM
Message 10 in Discussion
Hi Using the process class anyways was not a good idea. process Class makes sense
when you want to execute non-.Net aplications. In the case of pure .net applications
you should use the .Net techniqueswhich are there. For example you can use the
Assembly.Load method to load the assembly and then instantiate the type inside the
assembly For example i might have a winform application which might need to be
started(or for that matter a console application). In that case you can acheive the
startup of the applicatiuon as follows Sub Main()
Try
Dim l_objCalledWinFormAppAssembly As [Assembly]
'Note :
' Load the SLN File
' Compile the Solution using Rebuild All
' Modify the value of p_strCalledAssemblyFileName to store the correct
path of the winform assembly exe file
' Run the application
Dim p_strCalledAssemblyFileName As String =
"C:\temp\Dummy_CallingOneAppFromAnotherAppUsingAssemblyLoad\CalledWinformApp\bin\CalledWinformApp.exe"
Dim l_objCalledWinFormApppForm As Object
Console.WriteLine("Loading the Assembly")
l_objCalledWinFormAppAssembly =
[Assembly].LoadFrom(p_strCalledAssemblyFileName)
Console.WriteLine("Assembly Loaded. Creating an instance of Form1")
l_objCalledWinFormApppForm =
l_objCalledWinFormAppAssembly.CreateInstance("CalledWinformApp.Form1")
Console.WriteLine("Form1 Instance Created. Calling Button Click function")
l_objCalledWinFormApppForm.Button1_Click(Nothing, Nothing)
Console.WriteLine("Button Click Event Called. Now calling the function in
the other program which should throw an Exception with a Custom Message")
Try
l_objCalledWinFormApppForm.fnThrowException()
Catch p_objException As Exception
Console.WriteLine("This Exception SHOULD happen. Check Out the
Message getting printed as set in the Form1.fnThrowException function")
'Note that Im using p_objexception.InnerException.source And Not
p_objexception.Source. When u use
' assembly.load then the exception object source will be mscorlib
which will wrap the actual exception
' thrown
Console.WriteLine("Source : " & p_objException.InnerException.source)
'Note that Im using p_objException.InnerException.Message And Not
p_objexception.Message. When u use
' assembly.load then the exception object source will be mscorlib
which will wrap the actual exception
' thrown
Console.WriteLine("Source : " & p_objException.InnerException.Message)
End Try
Console.WriteLine("")
Catch p_objException As Exception
Console.WriteLine("This Exception should NOT have happened. Some problem
Try to Debug...")
Console.WriteLine(p_objException.Message)
End Try
Console.ReadLine()
End Sub Here note that from a console application im calling a Windows Forms.
The advantage is the code runs in the same process as of the calling application(the
same appdomain infact , though if you want you can load it in a separate appdomain for
application isolation), and you can seamlessly call the functionalities Also
attaching the Zip version of the whole solution for your reference. Download, copy,
open the sln in VS.Net and make only one change in the Module1.vb file as follows
' Load the SLN File
' Compile the Solution using Rebuild All
' Modify the value of p_strCalledAssemblyFileName in the main function of
Module1.vb to store the correct path of the winform assembly exe file
' Run the application The demo program has excepion handling implemented
hth regards, sr
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