Instantiate class from string

[Guest]

Hi

I have a string with a classname, and I need to instantiate an object of
this class.

How I can do that?

For example

formclass = "form999"
(formclass)MyNewForm = new (formclass)( );
MyNewForm.Show( );

Of course the string is assigned at runtime
Thanks In Advance

Rodrigo Juarez
Tiempo Hard SA

 

[Barry Kelly]

I have a string with a classname, and I need to instantiate an object of
this class.

Have a peek at the docs for Activator.CreateInstance.

-- Barry

 

[Steven Cheng[MSFT]]

Hi Rodrigo,

As Barry has suggested, you can use the "Activator.CreateInstance" method
to instance a type dynamically based on its type name. e.g.

static void TestCode()
{
string typename = "MyAppNameSpace.TestClass, AssemblyName";
Type type = Type.GetType(typename);

object obj = Activator.CreateInstance(type);

Console.WriteLine(obj.GetType().FullName);

}

Actually, there are many other useful methods and classes in
System.Reflection namespace that can help us deal with type/object
dynamically.


#Reflection Overview
http://msdn2.microsoft.com/en-us/library/f7ykdhsy.aspx

http://www.c-sharpcorner.com/UploadFile/harishankar2005/Reflectionin.NET1203
2005045926AM/Reflectionin.NET.aspx

Hope this also helps.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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[Steven Cheng[MSFT]]

Hello Rodrigo,

Does the suggestion on using reflection API helps you or have you got any
further ideas on this? If there is any further questions, please feel free
to post here.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


This posting is provided "AS IS" with no warranties, and confers no rights.