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[Solved] Do postBack when the RadComboBox's selection has changed

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ComboBox

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

Ashley Green asked on 29 Jul 2009, 10:29 PM

Hello,

I'm trying to achieve the following: if the selection of the drop down has not changed, do not postBack. if the selection has changed, do postBack. How would I achieve this? I tried to change OnClientDropDownClosing to OnClientSelectedIndexChanged but the OnClientSelectedIndexChanged event was not fired.

I'm using version 2009.2.701.35. My sample code is as below. Thanks for your help!

    
            <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> 
        
            <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %> 
        
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> 
        
            <html xmlns="http://www.w3.org/1999/xhtml">  
        
            <head runat="server">  
        
                <title>Untitled Page</title> 
        
                <style type="text/css">  
        
                    .Hidden  
        
                    {  
        
                        visibility: hidden;  
        
                    }  
        
                </style> 
        
            </head> 
        
            <body> 
        
                <script type="text/javascript">  
        
                function checkboxClick(e)    
        
                   {    
        
                        e.cancelBubble = true;    
        
                        if (e.stopPropagation)    
        
                        {    
        
                            e.stopPropagation();    
        
                        }    
        
                    }    
        
                    function OnClientDropDownClosing(sender)  
        
                    {  
        
                       document.getElementById(sender.get_id() + "Helper").click();  
        
                    }  
        
                </script> 
        
                <form id="form1" runat="server">  
        
                <asp:ScriptManager ID="ScriptManager1" runat="server" /> 
        
                <div> 
        
                    <telerik:RadComboBox runat="server" ID="RadComboBox1" Height="200" HighlightTemplatedItems="true" 
        
                        AutoPostBack="false" AllowCustomText="true" Text="All">  
        
                        <Items> 
        
                            <telerik:RadComboBoxItem Text="One" /> 
        
                            <telerik:RadComboBoxItem Text="Two" /> 
        
                            <telerik:RadComboBoxItem Text="Three" /> 
        
                        </Items> 
        
                        <ItemTemplate> 
        
                            <div> 
        
                                <asp:CheckBox onclick="checkboxClick(event);" runat="server" ID="CheckBox" Text="" /> 
        
                                <%# DataBinder.Eval(Container, "Text") %> 
        
                            </div> 
        
                        </ItemTemplate> 
        
                    </telerik:RadComboBox> 
        
                    <asp:Button ID="RadComboBox1Helper" runat="server" Text="" CssClass="Hidden" OnClick="ButtonHelper_Click" /> 
        
                </div> 
        
                </form> 
        
            </body> 
        
            </html>

    
            using System;  
        
            using System.Web.UI;  
        
            public partial class _Default : System.Web.UI.Page  
        
            {  
        
                protected void Page_Load(object sender, EventArgs e)  
        
                {  
        
                    if (!IsPostBack)  
        
                    {  
        
                        RadComboBox1.DataBind();  
        
                        RadComboBox1.OnClientDropDownClosing = "OnClientDropDownClosing";  
        
                        //RadComboBox1.OnClientSelectedIndexChanging = "OnClientDropDownClosing";  
        
                    }  
        
                    Page.Title = "new title";  
        
                } 
        
                #region DropDown Closed Events  
        
                protected void ButtonHelper_Click(object sender, EventArgs e)  
        
                {  
        
                    RadComboBox1.Text = "13";  
        
                } 
        
                #endregion  
        
            }

Thanks,
Ashley

[Solved] Do postBack when the RadComboBox's selection has changed

1 Answer, 1 is accepted