C1Combo with object as datasource : how to select columns to display?

Last post 05-13-2008 2:31 AM by fdrouhin. 2 replies.

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05-12-2008 11:14 AM

fdrouhin
Joined on 11-27-2006
Posts 6

C1Combo with object as datasource : how to select columns to display?

Reply Contact

Hello,

I want to use a collection of objects as a datasource of my C1Combo control. It works fine but a column is created for each public property of my object (10 for my object). How can I display only 2 columns in my control?

Remark: I have tried the AddItem method but this method is slow when the number of item is important. The DataSource method has very good answer time.

Thanks in advance for your help

François.

05-12-2008 5:30 PM In reply to

C1_JohnAd
Joined on 03-03-2006
Posts 741

Re: C1Combo with object as datasource : how to select columns to display?

Reply Contact

Hello,

You will need to specifically set the visibility of each column.

for example:

BEGIN CODE

For i As Integer = 0 To Me.C1Combo1.Columns.Count - 1

If Not Me.C1Combo1.Columns(i).Caption = "X" Then

Me.C1Combo1.Splits(0).DisplayColumns(i).Visible = False

End If

END CODE

This code will hide all the columns except for the column whose caption is "X".

I hope this will help.

Regards,

Allen Smith

<fdrouhin> wrote in message news:204769@10.0.1.98...

Hello,

I want to use a collection of objects as a datasource of my C1Combo control. It works fine but a column is created for each public property of my object (10 for my object). How can I display only 2 columns in my control?

Remark: I have tried the AddItem method but this method is slow when the number of item is important. The DataSource method has very good answer time.

Thanks in advance for your help

FranÃ§ois.

http://helpcentral.componentone.com/cs/forums/p/75220/204769.aspx#204769

05-13-2008 2:31 AM In reply to

fdrouhin
Joined on 11-27-2006
Posts 6

Re: C1Combo with object as datasource : how to select columns to display?

Reply Contact

Thanks it works.

Another solution is to remove columns instead of hide columns. What is the better solution for answer time? Hide or Remove?

Two another questions:

- how can I retreive the object associated to one item, like the SelectedItem method of the framework ComboBox class? The SelectedValue method seems to return only one value from one method of the object.

- how can I order the column? I don't really understand the logical of the column creation order.

Thanks very much.
Francois.

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