Re: [DOTNET] What do I need to implement to support DataBinding

[Sean Greer (SBI-Chico)]

For simple binding, the answer is no, you do not need to implement an
interface.  All you need to do to bind the class below to a TextBox is
ensure that FirstName, LastName and Dedication are properties (you can't
bind to instance member variables).

For example, assuming that FirstName is a string property, to bind a text
box to it do the following:

m_TextBox.DataBindings.Add("Text", anInstanceOfAuthor, "FirstName");

You should also define a property change notification event.  Fill out the
class for the FirstName example, it would look like this:

class Author
{
        public string FirstName
        {
                get{ return m_sFirstName; }
                set
                {
                        bool bFire = m_sFirtName != value;
                        m_sFirstName = value;
                        if(bFire)
                                Fire_FirstNameChanged();
                }
        }

        public event EventHandler FirstNameChanged;

        private Fire_FirstNameChanged()
        {
                if(FirstNameChanged != null)
                        FirstNameChanged(this, EventArgs.Empty);
        }
}

For complex binding (like the data grid), yes you need to implement one or
more interfaces.  I haven't done it, so I can't help you.  Look at
IBindingList...

Now would be a great time for Mark Boulter to post his complex data binding
sample that he mentioned some time ago! ;-)

HTH,

Seang


-----Original Message-----
From: Curtis Koppang [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 30, 2002 11:31 AM
To: [EMAIL PROTECTED]
Subject: [DOTNET] What do I need to implement to support DataBinding


Say I have a simple class which represents a single data entity, like the
following:

class Author {
    public FirstName;
    public LastName;
    public Dedication;
}

Do I need to implment any specific interfaces to support data binding?  I
checked the archives and most of the information has to do with exposing
Authors (plural) or is outdated (pre-RTM).

Thanks,
curt

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