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Aspx <asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <telerik:RadTabStrip ID="RadTabStripSpecies" runat="server" MultiPageID="RadMultiPage1"> </telerik:RadTabStrip> <div class="DesignWidth"> <telerik:RadListView runat="server" ID="RadListViewPictures" AllowPaging="True" DataKeyNames="p_PictureID" EnableViewState="False"> <ItemTemplate> <div class="rlvI" style="padding: 0px; margin: 5px; border: 10px ridge #C0C0C0; overflow: hidden;"> <img alt='<%# Eval("p_ImageFileName") %>' src='<%# Eval("p_ImageFileName","SquareThumbnail.ashx?p={0}") %>' border="0" /> </div> </ItemTemplate> <EmptyDataTemplate> <div class="RadListView RadListView_<%# Container.Skin %>"> <div class="rlvEmpty"> There are no items to be displayed.</div> </div> </EmptyDataTemplate> <LayoutTemplate> <div class="RadListView RadListViewFloated RadListView_<%# Container.Skin %>"> <div class="rlvFloated rlvAutoScroll"> <div id="itemPlaceholder" runat="server"> </div> </div> <telerik:RadDataPager ID="RadDataPager1" runat="server" PageSize="18" EnableViewState="False"> <Fields> <telerik:RadDataPagerTemplatePageField> <PagerTemplate> </PagerTemplate> </telerik:RadDataPagerTemplatePageField> <telerik:RadDataPagerButtonField FieldType="FirstPrev" FirstButtonText="first" NextButtonText="next" PrevButtonText="previous" LastButtonText="last" /> <telerik:RadDataPagerSliderField /> <telerik:RadDataPagerButtonField FieldType="NextLast" PrevButtonText="previous" LastButtonText="last" NextButtonText="next" FirstButtonText="first" /> <telerik:RadDataPagerTemplatePageField> <PagerTemplate> </PagerTemplate> </telerik:RadDataPagerTemplatePageField> </Fields> </telerik:RadDataPager> </div> </LayoutTemplate> </telerik:RadListView> </div> </asp:Content>Codebehind Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not IsPostBack Then Me.BindRadTabStripSpecies() End If End Sub Private Sub BindRadTabStripSpecies() Dim dt As New DataTable Try dt = Me.objDataAccess_Species.GetSpecies_Pictures Catch ex As Exception Me.SystemMessage("Error", "Data Retrieve Failed!", ex.Message) Exit Sub End Try Me.RadTabStripSpecies.CausesValidation = False Me.RadTabStripSpecies.DataTextField = "Name" Me.RadTabStripSpecies.DataNavigateUrlField = "" Me.RadTabStripSpecies.DataFieldID = "s_SpeciesID" Me.RadTabStripSpecies.DataValueField = "s_SpeciesID" Me.RadTabStripSpecies.DataFieldParentID = "sg_ParentSpeciesGroupID" Me.RadTabStripSpecies.DataSource = dt Me.RadTabStripSpecies.DataBind() End Sub Private Sub RadTabStripSpecies_TabClick(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadTabStripEventArgs) Handles RadTabStripSpecies.TabClick e.Tab.Selected = True ViewState("Selects_SpeciesID") = CType(Me.RadTabStripSpecies.SelectedTab.Value, Integer) Me.RadListViewPictures.Rebind() End Sub Private Sub RadListViewPictures_NeedDataSource(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadListViewNeedDataSourceEventArgs) Handles RadListViewPictures.NeedDataSource If IsNothing(ViewState("Selects_SpeciesID")) Then Exit Sub End If Dim s_SpeciesID As Integer = CType(ViewState("Selects_SpeciesID"), Integer) Dim dt As New DataTable Try dt = Me.objDataAccess_Picture.GetPicture_p_SpeciesID(s_SpeciesID) Catch ex As Exception Me.SystemMessage("Error", "Data Retrieve Failed!", ex.Message) Exit Sub End Try Dim Pictures As String = System.Configuration.ConfigurationManager.AppSettings("Pictures") Dim PicturesThumbs As String = System.Configuration.ConfigurationManager.AppSettings("PicturesThumbs") 'Add a couple computed columns concatenating our Picture key value 'dt.Columns.Add("ImageThumbURL", GetType(String), String.Format("'{0}' + {1}", PicturesThumbs, "p_ImageFileName")) 'dt.Columns.Add("ImageURL", GetType(String), String.Format("'{0}' + {1}", Pictures, "p_ImageFileName")) Me.RadListViewPictures.DataSource = dt End Sub<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="RadComboBoxTreeViewTest._Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <telerik:RadScriptManager ID="RadScriptManager1" runat="server"> </telerik:RadScriptManager> <telerik:RadAjaxManager runat="server" ID="radAjaxManager"> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="rcbOrganisationUnits"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="lblSelection" LoadingPanelID="loadingPanel1" /> </UpdatedControls> </telerik:AjaxSetting> <telerik:AjaxSetting AjaxControlID="RadComboBox1"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="lblSelection" LoadingPanelID="loadingPanel1" /> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings> </telerik:RadAjaxManager> <telerik:RadAjaxLoadingPanel ID="loadingPanel1" runat="server" IsSticky="true" style="position:absolute; top:0px; left:0px; height:100%; width:100%;background-color:Red;"> </telerik:RadAjaxLoadingPanel> <telerik:RadComboBox ID="rcbOrganisationUnits" runat="server" AutoPostBack="false" AllowCustomText="false" EmptyMessage="< Select item >" DataTextField="Description" Height="100"> <ItemTemplate> <telerik:RadTreeView ID="rtvOrganisationUnit" runat="server" DataTextField="Description" DataValueField="Id" DataFieldID="Id" DataFieldParentID="ParentId" OnNodeClick="rtv_NodeClick"> <DataBindings> </DataBindings> </telerik:RadTreeView> </ItemTemplate> <Items> <telerik:RadComboBoxItem /> </Items></telerik:RadComboBox> <telerik:RadComboBox ID="RadComboBox1" runat="server" AllowCustomText="false" EmptyMessage="< Select item >" AutoPostBack="true" Height="100"> <Items> <telerik:RadComboBoxItem Text="One" runat="server" /> <telerik:RadComboBoxItem Text="Two" runat="server" /> <telerik:RadComboBoxItem Text="Three" runat="server" /> </Items> </telerik:RadComboBox><asp:Label ID="lblSelection" Text="nothing selected" runat="server" /> </div> </form></body></html>