I have a Customer class that has Validate implemented.

I have a CustomerCollection class where I am doing the following:

coll = new CustomerCollection();
coll.LoadAll();
bindingSource1.DataSource = coll;

I am using this with XtraGrid from DevExpress.

All errors are displayed in the grid just fine.

How do I prevent the collection from being saved when it has errors?

I have tried everything I can think of ..

Thanks

Howard 

Mike.Griffin:

Are you doing Windows.Forms or Web? Is there not even you can trap (I guess you have probably tried that?)

I am using Windows.Form ...

Howard

Hi

Depends on how you've implemented your validation logic but something like the following might set you in the right direction:

1) the following would go in your EntityBase class (assuming you have one)

        Public ReadOnly Property IsValid() As Boolean
            Get
                For Each c As esColumnMetadata In Me.Meta.Columns
                    If Not Validate(c.Name, Me, c) Then Return False
                Next
                Return True
            End Get
        End Property

Note that the above assumes your Validate() method returns a Boolean - if it returns a string instead then you'd need to change the following line:

If Not Validate(c.Name, Me, c) Then Return False

to -

If Not Validate(c.Name,Me,c) = "" Then Return False

2) This would go in your CollectionBase class

        Public ReadOnly Property IsValid() As Boolean
            Get
                For Each e As EntityBase In Me
                    If Not e.IsValid Then Return False
                Next
                Return True
            End Get
        End Property

3) And you'd call it like this:

If not myCollection.IsValid then ....show your "Not valid" message or whatever, else....Save

Hope that helps a little

Martin

Martin,

That was a big help!!!

It got me headed in the right direction and my problem is now solved.

Thanks for your help,

Howard 

Great - glad you got it sorted Howard

Martin