Can I store a variable in an object?

Question

Say I have a form application, and I draw a circle inside of it. Could I store a variable inside that circle object? Something like this?

Dim circle1.testVar As Integer = 1

Would that work, and is there a way to do this if it won't?

Only if the Circle class has a property testVar. And you would set it in this way: circle1.testVar = 1 — Tim Schmelter
– Tim Schmelter, Commented Nov 12, 2013 at 21:35
I'm guessing I can only use in built properties- .left etc. here? — Overt_Agent
– Overt_Agent, Commented Nov 12, 2013 at 21:43

D Stanley · Accepted Answer · 2013-11-12 21:38:45Z

2

No, you cannot dynamically add properties to a Control. you can use the existing Tag property of a control:

circle1.Tag = 1

Unfortunately Tag is of type Object so you're going to have to check for Nothing and/or cast the value when you retrieve it.

answered Nov 12, 2013 at 21:38

D Stanley

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6 Comments

Overt_Agent Over a year ago

That's a shame, thanks for your answer :) Could the tag property be defined as an array and thus store several pieces of information?

D Stanley Over a year ago

You can store an array, but Tag is still defined as an Object so you'll still need to cast when retrieving it.

Overt_Agent Over a year ago

Would that work through: circle1.Tag = {"a","b"} Console.WriteLine(circle1(0).ToString) ?

Magnus Over a year ago

@niallmcfc You could assign it a Dictionary: circle1.Tag = new Dictionary<string, int>() for example to store multiple int values. To set a value: ((Dictionary<string, int>)circle1.Tag)["testVar"] = 1;

D Stanley Over a year ago

that would be:Console.WriteLine(circle1.Tag(0).ToString)

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