Back to General and Gameplay Programming

[.net] VB.NET Arraylist "Object reference not set to an instance of an object."

General and Gameplay Programming Programming

Started by ConorH December 19, 2007 06:55 PM

5 comments, last by Machaira 16 years, 3 months ago

ConorH

148

Author

December 19, 2007 06:55 PM

    Dim temp As Entry
            temp = New Entry


            temp.Surname = TextBox_AddSurname.Text
            temp.Address1 = TextBox_AddAdd1.Text
            temp.Address2 = TextBox_AddAdd2.Text
            temp.PostCode = TextBox_AddPC.Text
            temp.PhoneNum = TextBox_AddPN.Text
            temp.InvoiceNum = TextBox_AddIN.Text
            temp.InstallNum = TextBox_AddIsN.Text
            temp.Windows = 1 
            temp.Doors = 1 

            
            DB.Entries.Add(temp)

Iv tried to add an object to my Arraylist, but it tells me the refernce isnt set to an object. The compiler tells me to use the New keyword, which Im doing. What am I doing wrong?

Wan

1,366

December 19, 2007 07:02 PM

Perhaps either DB or its Entries property is not instantiated.

daviangel

604

December 19, 2007 07:13 PM

Quote:Original post by WanMaster
Perhaps either DB or its Entries property is not instantiated.

Yup it looks like maybe you have a problem with your Entry class?

[size="2"]Don't talk about writing games, don't write design docs, don't spend your time on web boards. Sit in your house write 20 games when you complete them you will either want to do it the rest of your life or not * Andre Lamothe

ConorH

148

Author

December 20, 2007 05:27 PM

Cheers, that worked. I did

public DB as New Database

Do I have to instantiate all my vars in VB? Im familiar with c++ so does VB have constructors? I know i could Google but thats at least 4 clicks away

Machaira

1,035

December 21, 2007 10:32 AM

You have to instantiate any variable that's a reference type.

Former Microsoft XNA and Xbox MVP | Check out my blog for random ramblings on game development

daviangel

604

December 31, 2007 02:40 AM

Quote:Original post by Machaira
You have to instantiate any variable that's a reference type.

Not if it's a shared(static in C#) class.

Machaira

1,035

December 31, 2007 10:56 AM

Quote:Original post by daviangel
Quote:Original post by Machaira
You have to instantiate any variable that's a reference type.

Not if it's a shared(static in C#) class.

Then it's not technically a variable, is it? ;)

Former Microsoft XNA and Xbox MVP | Check out my blog for random ramblings on game development

[.net] VB.NET Arraylist "Object reference not set to an instance of an object."

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

[.net] VB.NET Arraylist "Object reference not set to an instance of an object."

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

Reticulating splines