Retrieving the Value On SelectedIndexChange

[Stephen Kumor]

I am having an issue trying to get the RadComboBox's Selected Value on the SelectedIndexChanged event.  The odd thing is that during the SelectedIndexChanged event when I check e it has the old value (e.OldValue) and the old text (e.OldText) but the e text (e.Text) shows up correctly but the e.Value turns to null or "".  Why is my selected value turning to an empty string/null on SelectedIndexChange?


See my code below.  Thanks for any help.

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="SCRDropDown.ascx.cs" Inherits="AMC.OnlineSCR.Web.UserControls.SCRDropDown" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<link href="../stylesheets/tkComboBox.css" rel="stylesheet" type="text/css" />
<!-- content start -->
<asp:Label runat="server"
    ID="lblSelectASCR"
    AssociatedControlID="cbSelectASCR"
    Text="Select A SCR:" />

<telerik:RadComboBox
    runat="server"
    AutoPostBack="true"
    ID="cbSelectASCR"
    DataTextField="SCR_NUMBER"
    EnableLoadOnDemand="True"
    Width="670px"
    Height="190px"
    HighlightTemplatedItems="true"
    OnDataBound="cbSelectASCR_DataBound"
    OnItemDataBound="cbSelectASCR_ItemDataBound"
    OnSelectedIndexChanged="cbSelectASCR_SelectedIndexChanged"
    OnItemsRequested="cbSelectASCR_ItemsRequested">
    <HeaderTemplate>
        <ul>
            <li class="col1">SCR Number</li>
            <li class="titleCol">Title</li>
            <li class="col3">Status</li>
            <li class="col1">Date Submitted</li>
        </ul>
    </HeaderTemplate>
    <ItemTemplate>
        <ul>
            <li class="col1">
                <%# DataBinder.Eval(Container.DataItem, "SCR_NUMBER") %></li>
            <li class="titleCol">
                <%# DataBinder.Eval(Container.DataItem, "TITLE") %></li>
            <li class="col3">
                <%# DataBinder.Eval(Container.DataItem, "STATUS_NAME") %></li>
            <li class="col1">
                 <%# DataBinder.Eval(Container.DataItem, "DATE_OF_SUBMITTAL", "{0:dd MMM yyyy}") %></li>
        </ul>
    </ItemTemplate>
    <FooterTemplate>
        A total of
        <asp:Literal runat="server" ID="cbSelectASCRCount" />
        items
    </FooterTemplate>
</telerik:RadComboBox>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Telerik.Web.UI;
using System.Data;
using System.IO;
using AMC.OnlineSCR.BusinessLayer.BusinessObjects;
using AMC.OnlineSCR.BusinessLayer.Facade;
using AMC.OnlineSCR.Web.Components;

namespace AMC.OnlineSCR.Web.UserControls
{
    public partial class SCRDropDown : System.Web.UI.UserControl
    {
        private ISCRMainDataFacade SCRMainFacade = new SCRMainDataFacade();
        int m_SCRID;

        public int SCRID
        {
            get { return m_SCRID; }
            set { m_SCRID = value; }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            DataSet ds = SCRMainFacade.GetMiniSCRAll();
            cbSelectASCR.DataSource = ds;
            cbSelectASCR.DataBind();
        }

        protected void cbSelectASCR_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e)
        {
            SCRID = Convert.ToInt16(e.Value.ToString());
            //SCRID = ((DataRowView)e.Item.DataItem)["SCR_NUMBER"].ToString();
        }

        protected void cbSelectASCR_DataBound(object sender, EventArgs e)
        {
            //set the initial footer label
            ((Literal)cbSelectASCR.Footer.FindControl("cbSelectASCRCount")).Text = Convert.ToString(cbSelectASCR.Items.Count);
        }

        protected void cbSelectASCR_ItemsRequested(object sender, RadComboBoxItemsRequestedEventArgs e)
        {
            //get all customers whose name starts with e.Text
            DataSet ds = SCRMainFacade.GetMiniSCRAllLike(e.Text);
            cbSelectASCR.DataSource = ds;
            cbSelectASCR.DataBind();
        }

        protected void cbSelectASCR_ItemDataBound(object sender, RadComboBoxItemEventArgs e)
        {
            //set the Text and Value property of every item
            //here you can set any other properties like Enabled, ToolTip, Visible, etc.
            e.Item.Text = (((DataRowView)e.Item.DataItem)["SCR_NUMBER"].ToString()) + " - " + (((DataRowView)e.Item.DataItem)["TITLE"].ToString());
            e.Item.Value = ((DataRowView)e.Item.DataItem)["SCR_ID"].ToString();
        }
    }
}

[robertw102]

Why not try this:

cbSelectASCR.SelectedValue

Instead of using e.Value and see if that works.

[Stephen Kumor]

That's the curve ball.  Inside the cbSelectASCR_SelectedIndexChanged event the SelectedItem=null  and SelectedValue="".  I am baffled because the cbSelectASCR.Text holds my value of "009-669A - Second Test SCR".  Why would it persist the Text but not have a SelectedValue or SelectedItem?  Can it be the logic of adding Text and Value properties on the ItemDataBound Event...which it shouldn't because that is texbook from a Telerik example. 

Confucius say....Man who stands on toilet is high on pot!

[Stephen Kumor]

Figured it out.  I was binding my initial data on Page_Load and I did not have it in a (!Page.IsPostBack).  Once I put the databinding in the (!Page.IsPostBack) it worked like a charm.  It must have been with the ItemsRequested as I set a new datasource in there. Robert...I will mark you as answered just because you are the only one who actually replied.  Thanks.