CODEWITHSUNDEEP
vb.net
Kim Asloo
Kim Asloo

Reputation: 11

GetType - VB.NET - Code is causing syntax error

Imports System.Windows.Forms

Module Module1

    Sub Main()
        Dim TextBox1 As New TextBox
        Dim TextBox2 As New TextBox
        If (GetType(TextBox1).Equals(GetType(TextBox2))) Then ' Error Here
            Console.WriteLine("They are equal.")
        End If
    End Sub

End Module

I know, GetType for an object returns the Type of it. But here GetType(TextBox1) causes an error. I need to re-write this logic:

If (GetType(TextBox1).Equals(GetType(TextBox2))) Then ' Error Here
    Console.WriteLine("They are equal.")
End If

I wrote like this:

If TextBox1.GetType().FullName.Equals(TextBox2.GetType().FullName) Then ' Works fine
    Console.WriteLine("They are equal.")
End If

Can you re-write the logic ?

If (GetType(TextBox1).Equals(GetType(TextBox2))) Then ' Error Here
    Console.WriteLine("They are equal.")
End If

Upvotes: 0

Views: 640

Answers (3)

nelek
nelek

Reputation: 4322

If You want check are two object same then use :

If TypeName(TextBox1).Equals(TypeName(TextBox2)) Then Console.WriteLine("They are equal.")

Upvotes: 0

srdjan.veljkovic
srdjan.veljkovic

Reputation: 2548

Basically, GetType() operator expects a typename, not an object. To get a type of the object, use its GetType() method. IOW, in your code you can:

GetType(TextBox)

but can't:

GetType(TextBox1) ' Won't compile!

and have to:

TextBox1.GetType()

So, the error is expected, your solution is fine and your failed re-write attempt is an error, as expected.

For more detailed explanation, check:

https://msdn.microsoft.com/en-us/library/tay4kywk.aspx

Upvotes: 2

GSerg
GSerg

Reputation: 78200

The GetType operator works on type names, not variable names.

If (GetType(TextBox).Equals(GetType(TextBox))) Then
    Console.WriteLine("They are equal.")
End If

If you need to get type of a variable, then what you already have will work, although I don't understand why you needed to call FullName:

If TextBox1.GetType() Is TextBox2.GetType() Then
    Console.WriteLine("They are equal.")
End If

Upvotes: 1

Related Questions