String members and TextBox

[alanmusician]

I'm new to C# and OO in general, and have a newbie question.

I have a class (ValidTextBox) inherited from TextBox that has various modifications to it, and one thing that I would like to do is make the Text control refer to a custom string class rather than string. How can this be accomplished?

What I'm trying to do is add a ToProper to my ValidTextBox.Text. I want to be able to say ValidTextBox.Text.ToProper(); and have the text in the box turn to proper case. I've already written the ToProper method as a member of EntryString (which inherits from string), but I'm not sure how to get my ValidTextBox class to use it instead of string.

Thanks in advance,
--Alan

 

[stsuing]

I don't think that is possible until we get to VS 2008 and you can have an extention method that adds ToProper to the string class.

And in 2005 string is a sealed class so that you can't inherit from it so I'm not sure exactly what you did. Please post code if you can.

I might just add the method to your textbox with a good name on it like

ValidTextBox.ValueToProper();

 

[phinoppix]

That sounds interesting.

Maybe you can try shadowing the Text property?

    // Declare a private field for ValidTextBox
    private YourString _yourstring;
    
    // Define your own Text property...
    public new YourString Text
    {
        get{ return _yourstring; }
        set{ 
             base.Text = value.ToString();
             _yourstring = value;
           }
    }

Or, just add another property that returns EntryString.

My 2cents.