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Asked: 2026-05-11T00:11:47+00:00

How do you go about creating an instance of an object when given the

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How do you go about creating an instance of an object when given the class name as a string in an ASP.NET v2 application? For example, I’ve got a class called SystemLog defined in the app_code section of the application. The class is defined within the Reports namespace. To create an instance of the object, I do something like this:

Dim MyObject As New Global.Reports.SystemLog

However, I want to create this object using a string to define the type. The type name is stored in a SQL database as a string. I thinks it’s probably something to do with Activator.CreateInstance(AssemblyName, TypeName) but what I don’t know is what to pass in those strings. What is the assembly name of an ASP.NET web app?

Help!

Thanks, Rob.

PS. I don’t want a hard coded Select statement 🙂

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1 Answer

  1. string typeName = 'Your Type Name Here'; Type t = Type.GetType(typeName); object o = Activator.CreateInstance(t);

    This will give you an instanciated type. If will be up to you to cast it to the correct type and call your appropriate methods.

    If you need to create a type that doesn’t have a parameterless constructor there is an overload on CreateInstance that takes a params of objects to pass to a constructor. More info at this MSDN article.

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