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Dropdown list - set selected item from query

Posted on 2013-06-05
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Last Modified: 2013-06-18
Hi,

I have a .net page with a ddl.
The datasource query for the ddl is
select tbGroupDiscount.iGroupDiscountid, vGroupname,iProductid from tbGroupDiscount left join tbProductDiscount
on tbProductDiscount.iGroupDiscountid = tbGroupDiscount.iGroupDiscountid and iProductid = @iProductid where iClientid = @iClientid order by vGroupname

 <asp:DropDownList ID="ddlGroupDiscount" runat="server" AutoPostBack="true" AppendDataBoundItems="true"   DataSourceID="GetGroupDiscount" DataTextField="vGroupname" DataValueField="iGroupDiscountid" >
                <asp:ListItem Value="0" Text="Please Select"></asp:ListItem>

after I call databind in my cs, I wish to select an item if there's a value for productid returned in the query
eg query could return

1, group1, null
2, group2, null
3, group3, 99
4, group4, null

null/99 being the productid from the query above.. so if the query has a value for productid I'd like that item to be selected

any ideas welcome?

Cheers
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Question by:louise_8
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4 Comments
 
LVL 23

Accepted Solution

by:
Roopesh Reddy earned 125 total points
ID: 39225724
Hi,

You may have loop through the values returned from the database and check for the value and update the value as selected for the DropDownList.

You can set the value - DropDownList.SelectedValue - http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.listcontrol.selectedvalue.aspx

Hope it helps u...
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Author Comment

by:louise_8
ID: 39240115
Thanks
I suppose I'm confused because my ddl has a datasource and binds as the page is run
So because I dont create the listitems in the code behind does that mean I need to bind using the code behind or is there a way to select after its initallu bound?

Cheers
0
 
LVL 23

Assisted Solution

by:Roopesh Reddy
Roopesh Reddy earned 125 total points
ID: 39253992
Hi,

So, if the data is already binded, then you may have to loop through the list items and select the desired option!

Hope it helps u...
0
 

Author Closing Comment

by:louise_8
ID: 39258118
thanks
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