Type.GetType does not work in VB.NET but works in C#. VB.NET gurus Please help RRS feed

  • Question

  • User-716244244 posted


       I am an experienced C# programmer who is working on a VB.NET project now. I am writing different methods covering the following functionalities

    1) Take a datareader as input and return an arraylist of class object

    2) Take an xmlnode (received from a webservice) as input and return an arraylist of class object.

     The methods are generic methods which take datareader/xmlnode as first parameter and classname (string) as the second parameter. This way it will work trivially.

     The schema of class object matches with the input (datareader or xmlnode)

    In C# I used to do this by using reflection and Type.GetType(). But the Type.GetType() is not working in VB.NET. Its returning "Nothing". I made sure that the namespace/class names are spelled properly. I even tested the same code in C# and it works like a charm. Only in VB.net it does not work.

    The .vb file is created inside the App_Code folder of the web application.

    I read other posts and removed the temporary asp.net files and stuff but didn't help 

    Any help will be greatly appreciated 

     C# code


    Type type_ClassName = Type.GetType(className);   //Works like a charm


    VB.NET code

    Dim oType As Type = Type.GetType("JEB.DocumentIdsCaseNumbers")    // Does not work [:(] 

     I used Immediate window on debug mode for both vb.net and c# and confirmed that it does not work in vb.net

     Please help me to get the GetType() working in VB.NET


    Friday, May 23, 2008 2:32 PM

All replies

  • User-168033412 posted


    have a look on this article http://ziqbalbh.wordpress.com/2008/05/27/typegettype/ 

    Tuesday, May 27, 2008 6:42 AM
  • User-1899898566 posted


    Could you use the TypeOf Operator as all??

    Dim ty As Boolean = TypeOf <object> Is JEB.DocumentIdsCaseNumbers

    I know this example is not exact but it may help you??



    Friday, May 30, 2008 8:56 AM
  • User397347636 posted

    Type.GetType is a framework call - it should work identically in C# and VB.

    The global VB GetType macro is another story (and is equivalent to the C# 'typeof' operator), but this isn't a factor here.


    Friday, May 30, 2008 10:33 AM
  • User1837512635 posted

    'Method 1

    Dim Form1 As Form = Activator.CreateInstance(Of frmContractEdit)()


    'Method 2

    Dim Form2Type As Type = GetType(frmContractEdit)


    Dim Form2 As Form = CType(Activator.CreateInstance(Form2Type), Form)


    'Method 3

    'Fusion. needs to be in front and was found using MsgBox above

    'frmContractEdit needs to have Inherits System.Windows.Forms.Form in its Class definition (designer)

    Dim Form3Type As Type = Type.GetType("Fusion.frmContractEdit", True, True)


    Dim Form3 As Form = CType(Activator.CreateInstance(Form3Type), Form)


    'Method 4

    Dim Form4 As Form = CType(Activator.CreateInstance(Type.GetType("Fusion.frmContractEdit", True, True)), Form)


    Monday, October 6, 2008 8:16 PM