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Version Q2 2011 released 07/12/2011
select

TreeList / First Look

Configure RadTreeList


Change grid lines:

Category IDProductPriceIn stockParent Category ID
123
Page size:
select
A Appetizers   
  A1 Southwestern Twisted Chips (150 gr.) $6.79A
  A2 Top Shelf Combo Appetizer (300 gr.) $9.49A
B Beverages   
  B1 Sangria (90 ml.) $6.49B

  • RadTreeList is a hybrid control combining treeview and grid in one. It gives you the opportunity for hierarchical representation of the underlying data like in a treeview. In addition it can have multiple columns and provides you with the ability to perform advanced operations.

    The key features of the RadTreelist control are:

    • Various column types
    • Codeless data-binding using the DataSourceControls in ASP.NET 2.0/3.5
    • Data-Binding to various data sources which implement the IEnumerable, IList or ICustomTypeDescriptor interfaces
    • Integrated paging
    • Integrated sorting
    • Easily customizable skinning mechanism (setting single Skin property of the treelist)
    • The ShowOuterBorders, ShowTreeLines and GridLines properties allow you to quickly change the appearance
    • Interoperability with RadAjax and loading indicators - dramatically improves the responsiveness of the component, simulates Windows-application like behavior, and minimizes the traffic to the server
    • Single and Multi-Row Server-Side and Client-Side Selection
    • The expanded and the selected state of the items is persisted while navigating through pages

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page Language="c#" Inherits="Telerik.TreeListExamplesCSharp.FirstLook.DefaultCS"
        CodeFile="DefaultCS.aspx.cs" %>

    <%@ Register TagPrefix="telerik" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="telerik" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="telerik" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="telerik" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <!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">
        <telerik:HeadTag runat="server" ID="Headtag2" />
    </head>
    <body class="BODY">
        <form runat="server" id="mainForm" method="post">
        <telerik:Header runat="server" ID="Header1" NavigationLanguage="CS" />
        <!-- content start -->
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server" />
        <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" DefaultLoadingPanelID="RadAjaxLoadingPanel1">
            <AjaxSettings>
                <telerik:AjaxSetting AjaxControlID="RadTreeList1">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="RadTreeList1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
                <telerik:AjaxSetting AjaxControlID="CheckBox1">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="RadTreeList1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
                <telerik:AjaxSetting AjaxControlID="CheckBox2">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="RadTreeList1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
                <telerik:AjaxSetting AjaxControlID="DropDownList1">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="RadTreeList1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
                <telerik:AjaxSetting AjaxControlID="CheckBox3">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="RadTreeList1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
                <telerik:AjaxSetting AjaxControlID="CheckBox4">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="RadTreeList1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
                <telerik:AjaxSetting AjaxControlID="CheckBox5">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="RadTreeList1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
                <telerik:AjaxSetting AjaxControlID="CheckBox6">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="RadTreeList1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
            </AjaxSettings>
        </telerik:RadAjaxManager>
        <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">
        </telerik:RadAjaxLoadingPanel>
        <qsf:ConfiguratorPanel runat="server" ID="ConfigurationPanel1" Title="Configure RadTreeList"
            Expanded="true">
            <table>
                <tr>
                    <td style="width: 270px">
    <asp:CheckBox ID="CheckBox1" runat="server" Text="Show outer borders" Checked="true"
    AutoPostBack="true" OnCheckedChanged="CheckBox1_CheckedChanged" /><br />
    <asp:CheckBox ID="CheckBox2" runat="server" Text="Show tree lines" Checked="true"
    AutoPostBack="true" OnCheckedChanged="CheckBox2_CheckedChanged" /><br />
                        Change grid lines:
                        <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
                            <asp:ListItem Selected="True">Both</asp:ListItem>
                            <asp:ListItem>Horizontal</asp:ListItem>
                            <asp:ListItem>None</asp:ListItem>
                            <asp:ListItem>Vertical</asp:ListItem>
                        </asp:DropDownList>
                    </td>
                    <td style="width: 270px;" valign="top">
    <asp:CheckBox ID="CheckBox3" runat="server" Text="Enable paging" Checked="true" AutoPostBack="true"
    OnCheckedChanged="CheckBox3_CheckedChanged" /><br />
    <asp:CheckBox ID="CheckBox4" runat="server" Text="Enable sorting" Checked="true"
    AutoPostBack="true" OnCheckedChanged="CheckBox4_CheckedChanged" />
                    </td>
                    <td valign="top">
    <asp:CheckBox ID="CheckBox5" runat="server" Text="Enable client-side items selection" Checked="false"
    AutoPostBack="true" OnCheckedChanged="CheckBox5_CheckedChanged" /><br />
    <asp:CheckBox ID="CheckBox6" runat="server" Text="Allow multi-item selection" Checked="false"
    AutoPostBack="true" OnCheckedChanged="CheckBox6_CheckedChanged" />
                    </td>
                </tr>
            </table>
        </qsf:ConfiguratorPanel>
        <telerik:RadTreeList ID="RadTreeList1" runat="server" OnNeedDataSource="RadTreeList1_NeedDataSource"
            ParentDataKeyNames="ParentID" DataKeyNames="ID" AllowPaging="true" PageSize="5"
            AutoGenerateColumns="false" AllowSorting="true">
            <Columns>
                <telerik:TreeListBoundColumn DataField="ID" UniqueName="ID" HeaderText="Category ID" />
                <telerik:TreeListTemplateColumn DataField="ProductName" UniqueName="ProductName" HeaderText="Product">
                    <ItemTemplate>
                        <%# Eval("ProductName")%><%# Eval("Quantity").ToString() != "" ? "&nbsp;(" + Eval("Quantity").ToString() + ")" : ""%>
                    </ItemTemplate>
                    <HeaderStyle Width="300px" />
                </telerik:TreeListTemplateColumn>
                <telerik:TreeListBoundColumn DataField="Price" UniqueName="Price" DataFormatString="{0:C2}"
                    HeaderText="Price" DataType="System.Decimal">
                    <ItemStyle HorizontalAlign="Right" />
                </telerik:TreeListBoundColumn>
                <telerik:TreeListCheckBoxColumn DataField="InStock" UniqueName="InStock" HeaderText="In stock">
                    <HeaderStyle Width="60px" />
                    <ItemStyle HorizontalAlign="Center" />
                </telerik:TreeListCheckBoxColumn>
                <telerik:TreeListBoundColumn DataField="ParentID" UniqueName="ParentID" HeaderText="Parent Category ID" />
            </Columns>
        </telerik:RadTreeList>
        <telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" />
        <!-- content end -->
        <telerik:Footer runat="server" ID="Footer1"></telerik:Footer>
        </form>
    </body>
    </html>

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