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RadComboBox in MVC only with ViewState?

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ComboBox

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

Housi asked on 17 Jun 2009, 11:53 AM

Hi all
I am using the RadComboBox in an ASP.NET MVC enviroment.
When I let run the RadCombobox within a <form id="form1" runat="server"> all works fine.
But the goal of MVC is to work without a ViewState in order to avoid any overhead, so I try to use the RadComboBox without the ViewState, means use Html.Begin() and Html.EndForm() instead of <form id="form1" runat="server">.

When I do so, the following runtime error occurs:

Runtime error in Microsoft JScript: 'attributes' is Null or not an object

at Line 1900 in Telerik.Web.Ui.Webresource_1.axd

if(_2e["attributes"]){
this.get_attributes()._load(_2e["attributes"]);
}

I assume now, that RadComboBox is only useable when a ViewState is available. If yes, can you tell me which other controls are dependent of the ViewState? And if no, can you tell me what I am doing wrong? Here is my code:

In the MasterPage:
<% using(Html.BeginForm()) { %>

<telerik:RadScriptManager ID="mainRadScriptManager" runat="server" EnableTheming="True" />

......

In the View:

categoryRadComboBox.DataSource = ViewData[

ProductController.Identifiers.DataSources.Categories];

categoryRadComboBox.DataBind();

<telerik:RadComboBox ID="categoryRadComboBox" Runat="server"

AutoPostBack="True" DataTextField="Name"

DataValueField="ProductCategoryID" Height="66px" Width="250px" Skin="Default" MaxHeight="400px">

</telerik:RadComboBox>

And in the Controller:

string categoryValue = RadControlHelper.ExtractComboBoxValue(Request, Identifiers.Controls.CategoriesComboBox);

AdventureWorksDataContext context = new AdventureWorksDataContext();

var categories = from category in context.ProductCategories

orderby category.Name

select new { category.Name, category.ProductCategoryID };

ViewData[

Identifiers.DataSources.Categories] = categories.ToList();

Thanks for your help and best regards.
Hans

RadComboBox in MVC only with ViewState?

3 Answers, 1 is accepted