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Custom Template and LoadOnDemand/ShowMoreResults/EnableVirtualScrolling

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ComboBox
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Robert Vreeland
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Robert Vreeland asked on 06 Sep 2008, 03:35 AM
I'd like to be able to do something like the sample at:

http://demos.telerik.com/aspnet/prometheus/ComboBox/Examples/PopulatingWithData/AutoCompleteSql/DefaultCS.aspx

In order to increase performance and not have all of the items loaded initially.

However I'm using a custom template to display multiple columns and am uncertain how to do it.  All of the examples assume one item / column and that you can just use an add method on the combobox to add additional items.

Here's my current code below.  Is there a way that i could achieve this?

<

telerik:RadComboBox ID="radcbxaccountnumber" runat="server" MaxLength="16" Width="160px" DropDownWidth="340" EnableEmbeddedSkins="false" Skin="WebIE7" AllowCustomText="true" MarkFirstMatch="true" Text='<%# DataBinder.Eval(database.duckds, "Tables(0).DefaultView.(0).txtvar1") %>' EnableLoadOnDemand="true" HighlightTemplatedItems="true" ItemRequestTimeout="500" OnItemsRequested="radcbxaccountnumber_ItemsRequested" OnItemDataBound="radcbxaccountnumber_ItemDataBound" ShowMoreResultsBox="true" EnableVirtualScrolling="true">

<HeaderTemplate><table style="width:300px;text-align:left">

<tr><td style="width:75px;">Account#</td>

<td style="width:75px;">Name</td>

<td style="width:100px;">Product</td>

</tr></table></HeaderTemplate>

<ItemTemplate><table style="width:300px;text-align:left">

<tr><td style="width:75px;vertical-align:top;"><%#DataBinder.Eval(Container.DataItem, "txtvar1")%></td>

<td style="width:75px;vertical-align:top;"><%#DataBinder.Eval(Container.DataItem, "txtvar2")%></td>

<td style="width:100px;vertical-align:top;"><%#DataBinder.Eval(Container.DataItem, "reqtype", "{0}") + " " + DataBinder.Eval(Container.DataItem, "prodtype", "{0}")%></td>

</tr></table></ItemTemplate></telerik:RadComboBox>

and

Public

requestdataview As DataView

Protected Sub radcbxaccountnumber_ItemsRequested(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadComboBoxItemsRequestedEventArgs)

requestdataview = database.FillDataViewWithCaching(

"getrelatedducks " + Request.QueryString("flockid") + ",1")

radcbxaccountnumber.DataSourceID =

""

radcbxaccountnumber.DataSource = requestdataview

radcbxaccountnumber.DataBind()

End Sub

Protected Sub radcbxaccountnumber_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadComboBoxItemEventArgs)

e.Item.Text = (

DirectCast(e.Item.DataItem, DataRowView))("txtvar1").ToString()

e.Item.Value = (

DirectCast(e.Item.DataItem, DataRowView))("txtvar1").ToString()

End Sub

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Veselin Vasilev
Telerik team
answered on 08 Sep 2008, 12:41 PM
Hello Robert Vreeland,

Please check this code library:
Multicolumn combo with LoadOnDemand and ShowMoreResults

Sincerely yours,
Veskoni
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.
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Robert Vreeland
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Veselin Vasilev
Telerik team
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