Problem with Activator.CreateInstance in C#

  • Thread starter Thread starter Doug Riley
  • Start date Start date
D

Doug Riley

I am using CreateInstance to create an instance of a class and invoke
a function of that class. I really need it to execute in a single
line of code (long story, but I want to execute this code in the
command window on demand, without declaring any variables).

This code WORKS (but requires 2 lines of code and a variable
declaration):
Type typ = Type.GetTypeFromProgID("MyDLLx.clsMyClass");
Activator.CreateInstance(typ).mNoShow("Test");

This Code DOES NOT WORK:
Activator.CreateInstance((System.Type)Type.GetTypeFromProgID("MyDLLx.clsMyClass")))).mNoShow("Test");

The error, when executed from the command window is:
arguments do not match parameters for function ...

The error (compile), when coded in the application is:
\'object' does not contain a definition for 'mNoShow'

Any help is most appreciated.
 
Type typ = Type.GetTypeFromProgID("MyDLLx.clsMyClass");
Activator.CreateInstance(typ).mNoShow("Test");

This Code DOES NOT WORK:
Activator.CreateInstance((System.Type)Type.GetTypeFromProgID("MyDLLx.clsMyClass")))).mNoShow("Test");

The error, when executed from the command window is:
arguments do not match parameters for function ...

The error (compile), when coded in the application is:
\'object' does not contain a definition for 'mNoShow'

Any help is most appreciated.
Click to expand...

Are you sure these are verbatim lines? Neither one will work.(Although it
probably will in VB)
 
Doug,

Actually, neither line of code should work. The reason for this is that
the CreateInstance method returns an object. The only way I can see this
working is if it is in VB.

I would recheck the two lines you say that work, because they shouldn't.

Is it possible that the two lines are in a block that is swallowing the
exception?
 
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