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Dropdownlist in a FormTemplate

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Brendan Vogt
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Brendan Vogt asked on 26 Aug 2008, 11:07 AM
Hi,

I am struggling with my dropdownlist in my FormTemplate.  When I click on the Insert link it populates the dropdownlist just fine.

<radcb:RadComboBox
   ID="rcbTitles"
   AppendDataBoundItems="true"
   DataSourceID="odsTitles"
   DataTextField="Description"
   DataValueField="TitleID"
   Skin="WindowsGray"
   SelectedValue='<%# Bind("Titles") %>'
   runat="server">
   <Items>
      <radcb:RadComboBoxItem Text="Select" Value="" />
   </Items>
</radcb:RadComboBox>


My ItemCommand looks like:

if (e.CommandName == RadGrid.InitInsertCommandName)
{
   e.Canceled = true;

   ListDictionary newValues = new ListDictionary();
   newValues["Titles"] = "";
   //Insert the item and rebind
   e.Item.OwnerTableView.InsertItem(newValues);
}


I am using a FormTemplate.  I am not understanding my error, I have been struggling for 2 days, is there no one on this forum that can help me?  When I click on the Insert link and click cancel I get the following error:

DataBinding: 'Telerik.WebControls.GridInsertionObject' does not contain a property with the name 'Titles'.

What am I doing wrong?  Please can some try and help me??

Thanks
Brendan

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Brendan Vogt
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answered on 26 Aug 2008, 01:41 PM
My grid is loaded like this:

private void LoadCommunication()
{
   int _ClientId = Int32.Parse(Request.QueryString["ClientId"]);
   List<Communication> communications = CommunicationManager.QueryCommunicationsByClientId(_ClientId);

   rgCommunications.DataSource = communications;
   rgCommunications.DataBind();
}

In each Communication class there is a reference to the Title class.  So if I need to access the the TitleID property, then it would be something like:

Communication.Title.TitleID

The object datasource in my .aspx file to load the titles looks like:

<asp:ObjectDataSource
   ID="odsTitles"
   TypeName="Nedbank.Excon.Lookup.TitleManager"
   SelectMethod="GetTitles"
   runat="server">
</asp:ObjectDataSource>


I know that my error is here:

SelectedValue='<%# Bind("Titles") %>'

..but I do not know how to fix it, or make it work.  There is no Titles property.  I'm assuming they are looking for the Title.TitleID?  This does not work in Bind("Title.TitleID").  I did read the sample applications.

Please can someone advise..
0
Sebastian
Telerik team
answered on 29 Aug 2008, 10:18 AM
Hi Brendan,

You can easily bypass the error by setting AppendDataBoundItems = true for RadComboBox and including an empty item to its Items collection. Review the third paragraph of this documentation article for more details:

http://www.telerik.com/help/aspnet-ajax/grderrormessages.html

Additionally, I recommend you use advanced binding for your grid by intercepting the NeedDataSource event.

Best regards,
Stephen
the Telerik team

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Brendan Vogt
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Answers by
Brendan Vogt
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Sebastian
Telerik team
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