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Problem with SelectedIndexChanged

3 Answers 136 Views

ComboBox

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

Paolo asked on 18 Mar 2009, 09:33 PM

Hello,

I'm having quite an annoying problem with Radcombobox.
Here's the scenario, very simple:

ASPX

    
                           <telerik:RadComboBox ID="RadComboBox1" runat="server" Width="300px" Skin="Web20"  
        
                           EmptyMessage="Choose layout..." AutoPostBack="true" HighlightTemplatedItems="True" 
        
                           OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged"  
        
                           AllowCustomText="true" > 
        
                              <ItemTemplate> 
        
                                  <img src='<%# DataBinder.Eval(Container, "Attributes['ImagePath']") %>'  alt=""/> 
        
                              </ItemTemplate> 
        
                               <Items> 
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout1.png" Value="Layout1"></telerik:RadComboBoxItem> 
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout2.png" Value="Layout2"></telerik:RadComboBoxItem> 
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout3.png" Value="Layout3"></telerik:RadComboBoxItem> 
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout4.png" Value="Layout4"></telerik:RadComboBoxItem> 
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout5.png" Value="Layout5"></telerik:RadComboBoxItem> 
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout6.png" Value="Layout6"></telerik:RadComboBoxItem> 
        
                               </Items> 
        
                           </telerik:RadComboBox>

Code Behind

    
                protected void Page_Load(object sender, EventArgs e) 
        
                { 
        
                    if (!Page.IsPostBack) 
        
                    { 
        
                        for (int i = 0; i < RadComboBox1.Items.Count; i++) 
        
                        { 
        
                            RadComboBox1.Items[i].DataBind(); 
        
                        } 
        
                    } 
        
                } 
        
                protected void RadComboBox1_SelectedIndexChanged(object o, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e) 
        
                { 
        
                    string strSelectedValue = RadComboBox1.SelectedValue; 
        
                    // other stuff 
        
            }

I've already tried everything but I can't still get the SelectedIndexChanges event to fire when I select the first item.
Of course the problem is that the SelectedIndex at the begin is set to 0, that's the first item, but how can I change this behaviour.
Or still better, how can I get the above example to work..?

Thank you

Regards,

Paolo

3 Answers, 1 is accepted

answered on 19 Mar 2009, 03:39 PM

Hi Paolo,

Please set the Text property of the items as well.

    
            ... 
        
            <Items>  
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout1.png" Value="Layout1" Text="Layout1"></telerik:RadComboBoxItem>  
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout2.png" Value="Layout2" Text="Layout2"></telerik:RadComboBoxItem>  
        
                                   <telerik:RadComboBoxItem ImagePath="../Grafica/Layout3.png" Value="Layout3" Text="Layout3"></telerik:RadComboBoxItem>  
        
            ...

Best wishes,
Veselin Vasilev
the Telerik team

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answered on 19 Mar 2009, 06:08 PM

Hi Veselin,

thank you for your answer.

I tried your tip but unfortunately it doesn't seem to do the trick, or at least not completely.
In fact, the first time I run the page if I chose the first item the SelectedIndexChanged is not being fired. Chosing another item, the second one for example, the event is fired. After the postback the event fires even if I chose the first item but as soon as the postback returns here's again the first item doesn't fire the the event.
I thinking to drop this problem placing a sort of submit button. Certainly, from usability point of view, is all but a good solution.
Do you have any other suggestions?

Regards,

Paolo