Problem in using Assembly CreateInstance

  • Thread starter Thread starter vinoth
  • Start date Start date
V

vinoth

Hi,

I want to create an Instance of Class using Assembly.CreateInstance
method. I have loaded my assmbly

Assembly exeAssmb = Assembly.LoadWithPartialName"CommonStructures");
//Assembly exeAssmb =
Assembly.LoadFrom("C:\\Inetpub\\wwwroot\\Vinoth\\CommonStructures.dll");


Then when i create an Instance of the Assembly it giving Undefined
Value.
string instClass = "ManWrapper";
object inst =exeAssmb.CreateInstance(instClass);
//object inst =Activator.CreateInstance(exeAssmb.FullName,instClass);

This class(ManWrapper) is in CommonStructures and i registered it in
gacutil also.

I tried the Commentd line also. What is the problem? Is anybody knows
solution please let me know.

Thanks,
Vinoth
 
I want to create an Instance of Class using Assembly.CreateInstance
method. I have loaded my assmbly

Assembly exeAssmb = Assembly.LoadWithPartialName"CommonStructures");
//Assembly exeAssmb =
Assembly.LoadFrom("C:\\Inetpub\\wwwroot\\Vinoth\\CommonStructures.dll");

Then when i create an Instance of the Assembly it giving Undefined
Value.
string instClass = "ManWrapper";
object inst =exeAssmb.CreateInstance(instClass);
//object inst =Activator.CreateInstance(exeAssmb.FullName,instClass);

This class(ManWrapper) is in CommonStructures and i registered it in
gacutil also.

I tried the Commentd line also. What is the problem? Is anybody knows
solution please let me know.
Click to expand...

If I understand you correctly, you are trying to create an instance of
the class ManWrapper, not of the loaded assembly. You don't mention the
error you are getting - do you mean you simply get a null value returned
by the CreateInstance method? You don't see any exception message during
the process?

Taking a guess about the nature of your problem, I'd say that you might
need to give the complete namespace in addition to the ManWrapper class
name. Usually classes are organized in namespaces (although you could
manually rearrange the class files created automatically by VS to
prevent this from happening) and you'll need to give the namespace in
addition to the class name to be able to create an instance of the class.


Oliver Sturm
 
If you did not get any exception making the Assembly.CreateInstance call,
then the class name you specified was not found. Your issue might be with
the name of the class (including namespace).
On the other hand, if an exception was thrown, you might want to check if
there exists a public parameter-less constructor in the class you need.

HTH
Cois
 
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