Please help me: How can I solve this "Object reference not set to an instance of an object" error when using Reflection. I'm a creating this "programme" to teach languages. Each Topic is in a separate form because it has many activities. I have a form which shows a list of activities. When pressing a button called "Empezar" the selected topic (form) should be shown: I'm trying to call one of these forms from a string which contains its name. I think the variable is already declared as a form. I also think the function helps the variable refering to a form, but after debugging I realized the error is here. The name of the form is correct, too. So what do you think the problem is?
Private Sub Btn_EMPEZAR_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Btn_EMPEZAR.Click
Dim strCreatedFromButton As String = "Frm_The_Greetings"
Dim frm As New Form
frm = DirectCast(CreateObjectInstance(strCreatedFromButton), Form)
frm.Show()
End Sub
Public Function CreateObjectInstance(ByVal objectName As String) As Object
Dim obj As Object
Try
If objectName.LastIndexOf(".") = -1 Then
objectName = [Assembly].GetEntryAssembly.GetName.Name & "." & objectName
End If
obj = [Assembly].GetEntryAssembly.CreateInstance(objectName) 'The 'problem is here.
'But I don't know how to correct this
'because I copied the code
'from another web page because
'I'm just trying to learn by myself :/
'Why Obj Variable is still equal to "Nothing" after this line? :/
Catch ex As Exception
obj = Nothing
End Try
Return obj
End Function
