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Latest version displays EmptyMessage instead of selected item

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ComboBox

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

Aaron Bauman asked on 03 Jan 2012, 09:01 PM

Hello,
I have a simple RadComboBox that when an item is selected it redirects the page back to itself and is supposed to display the item that was selected in the RCB.
This was working with Web.UI version 2010.3.1109.40, but it broke after upgrading to version 2011.3.1115.40.

With the latest version it will reload the page, but will display the "EmptyMessage" text instead of the selected text.

Here's my page:

<%@ Page Title="Home Page" Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb"

Inherits="RadComboBoxBug._Default" %>

<!DOCTYPE HTML />

<%@ Register TagPrefix="telerik" Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" %>

<html>

<head id="Head1" runat="server">

<title>RadComboBox Issues</title>

<link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />

</head>

<body>

<form id="Form1" runat="server">

<telerik:RadScriptManager ID="RadScriptManager1" runat="server" />

<div class="page">

<div class="main">

<div style="margin: 10px; border: 1px solid #CCC; padding: 10px;">

<telerik:RadComboBox ID="RadComboBox2" runat="server" EnableLoadOnDemand="true" EmptyMessage="Select a Person"

AppendDataBoundItems="false" AutoPostBack="true" DataValueField="RecordID" DataTextField="Name"

ShowMoreResultsBox="true" EnableVirtualScrolling="false" MarkFirstMatch="true"

CausesValidation="False" OnClientDropDownOpening="onDropDownOpening" />

<asp:Label ID="lbl_SelectedPerson" runat="server" Style="margin-left: 15px" />

</div>

</form>

</body>

<script type="text/javascript">

function onDropDownOpening(sender) {

var attributes = sender.get_attributes();

if (attributes.getAttribute("DefaultItem") === "true") {

sender.requestItems("", false);

attributes.setAttribute("DefaultItem", "false");

}

</script>

</html>

...and the it's code-behind:

Imports Telerik.Web.UI

Public Class _Default

Inherits Page

Private Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load

If IsPostBack = False Then

Dim personID As String = Request.QueryString("PID")

If personID IsNot Nothing Then

RadComboBox2.SelectedValue = personID

RadComboBox2.Attributes.Add("DefaultItem", "true")

RadComboBox2.Items.Add(New RadComboBoxItem(String.Format("Person {0}", personID), CStr(personID)))

End If

End Sub

Private Sub Page_PreRender(sender As Object, e As System.EventArgs) Handles Me.PreRender

lbl_SelectedPerson.Text = String.Format("Selected Item: {0}", RadComboBox2.SelectedValue)

End Sub

Private Sub RadComboBox2_ItemsRequested(sender As Object, e As RadComboBoxItemsRequestedEventArgs) Handles RadComboBox2.ItemsRequested

RadComboBox2.DataSource = GetPeople()

RadComboBox2.DataBind()

e.EndOfItems = True

End Sub

Private Sub RadComboBox2_SelectedIndexChanged(sender As Object, e As RadComboBoxSelectedIndexChangedEventArgs) Handles RadComboBox2.SelectedIndexChanged

Response.Redirect(String.Format("/Default.aspx?PID={0}", e.Value))

End Sub

Private Function GetPeople() As List(Of Person)

Dim theList As New List(Of Person)

For i As Integer = 1 To 100

theList.Add(New Person() With {.RecordID = i, .Name = String.Format("Person {0}", i)})

Next

Return theList

End Function

Public Structure Person

Public Property RecordID As Integer

Public Property Name As String

End Structure

End Class

Does anybody know what's going on with this?

Thanks,
-Aaron

2 Answers, 1 is accepted

Accepted

answered on 04 Jan 2012, 02:25 PM

Hi Shinu,
I had seen this thread earlier and had gone over the details of it and tried to do what it said without much luck. I tried it again and "selected" the appropriate item a different way and it seemed to work this time. Kind of odd, but nonetheless it's taken care of.

Private Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load

If IsPostBack = False Then

Dim personID As String = Request.QueryString("PID")

If personID IsNot Nothing Then

RadComboBox2.Attributes.Add("DefaultItem", "true")

RadComboBox2.Items.Add(New RadComboBoxItem(String.Format("Person {0}", personID), CStr(personID)))

RadComboBox2.SelectedValue = personID

End If

End Sub

Thanks,
-Aaron