Topic: ACAD 2013 - Visual Studio Express 2010 (VB.net)

[Yosso]

I have been working thru the AutoDesk DevTV presentations and labs for .NET and have run into an error that has me stumped.

http://download.autodesk.com/media/adn/AcadDotNetTraining/DevTV_AutoCAD_NET_Training_Session_4/DevTV_AutoCAD_NET_Training_Session_4.html

Partial quote of the code...

Public myPaletteSet As New PaletteSet

    Public myPalette As UserControl1

    <CommandMethod("palette")> _
    Public Sub palette()
        If (myPaletteSet = Nothing) Then

An error is being thrown for the bolded line above.

Error   3   Operator '=' is not defined for types 'Lab4.PaletteSet' and 'Lab4.PaletteSet'

Import statements from lab.

Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.EditorInput
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Geometry
Imports System.Windows
Imports Autodesk.AutoCAD.ApplicationServices.Core

The three Autocad references are loaded, all from the AutoCAD program folder.


acmdg.dll
acdbmdg.dll
accoremgd.dll

Any ideas for the 'noobie'?

Thank you in advance.

Mike

[Kerry]

= is the assignment operator
== is the equality test operator

try something like

Code - vb.net: [Select]

1.  If (myPaletteSet == Nothing) Then

[gile]

Hi,

Kerry, what you say stands for C#, it's not the same with VB (which is much more verbose  ).

In VB,
= is the assignment operator and also the equality operator for value types (numbers, strings, structures).
<> is the inequality operator for value types
Is is the equality operator for reference types.
IsNot is the inequality operator for reference types.

So it would be :

Code - vb.net: [Select]

1. If myPaletteSet Is Nothing Then

[Kerry]

Thanks gile.
all I can say is that my brain locks up when I see VB code. ... my bad !

and thinking about it, assigning Nothing to an object would probably not cause an error ..

[Yosso]

I appreciate all of the help and the "is" corrected the equal error (which is odd, as the person doing the presentation used "=" in his vb.net code w/o any errors).

There was another error message that also has me stumped (doesn't take much these days).

Type 'PaletteSet' is not defined

for the code:

Public myPaletteSet As New PaletteSet

Figured out my last error...always easier to see your mistakes after a good nights rest.

I left off the Autodesk.AutCAD.Windows namespace.  After it was added all is well (relatively speaking).

[WILL HATCH]

all I can say is that my brain locks up when I see VB code.

+1  :ugly:

[MexicanCustard]

all I can say is that my brain locks up when I see VB code.

+1  :ugly:

+2 :ugly: