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[Solved] Problem with Virtual Scrolling when databinding to ObjectDataSource

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DropDownList

This is a migrated thread and some comments may be shown as answers.

Evgeniya asked on 29 Mar 2016, 06:56 PM

Hi,

RadDropDownList does not show the list of items when EnableVirtualScrolling="true". For my data source I'm using ObjectDataSource. Radgrid is also bound to this data source. I am working with UI for ASP.NET AJAX, v. 2014.3.1209.40

Any work around?

<telerik:RadDropDownList id="ddlBlockDeleteHigh" runat="server" DataValueField="CODE" DataTextField="CODE" DataSourceID="ObjectDataSource1" EnableVirtualScrolling="true" DropDownHeight="200px" Width="100px" ></telerik:RadDropDownList>

and here's the code for Object Data Source:

<asp:ObjectDataSource id="ObjectDataSource1" runat="server" UpdateMethod="Update" TypeName="VUE.CouponOracleDataObject" SelectMethod="Select" OldValuesParameterFormatString="original_{0}" InsertMethod="Insert" DeleteMethod="Delete"></asp:ObjectDataSource>

2 Answers, 1 is accepted

answered on 29 Mar 2016, 09:11 PM

The actual problem turned out to be in the number of records I am trying to load in the RadDropDownList. In my case, the control stops showing the items in the dropdown at about 30 000 records. On the same page, I also load about 50 000 records in a radgrid, using EnableVirtualization="true" property. The grid is working properly but the dropdown is not. If I remove EnableVirtualScrolling="true" property from the dropdown the problem disapears but the page takes a long time to load.

Any idea how to work around this problem?