Automatic Data Operations

RadTreeList provides an API for inserting new data, updating existing data and deleting data from the specified data source. You can use these features while writing very little code.

Controlling the automatic data source operations

Once it is bound to a DataSource control that supports Insert, Update, and Delete operations, RadTreeList can take an advantage of the data source capabilities to perform the required operations.The only requirement is binding the treelist to a declarative data source using the DataSourceID property of the control. Other than this, the functionality is automatically handled, without the need to write any custom code.

You also need to set the DataKeyNames and ParentDataKeyNames properties of the RadTreeList control so that the insert, update, and delete operations perform as expected.

RadTreeList bound to SqlDataSource

<telerik:RadTreeList RenderMode="Lightweight" runat="server" ID="RadTreeList1" DataSourceID="SqlDataSource1"
    AutoGenerateColumns="False" AllowPaging="True" PageSize="5" DataKeyNames="EmployeeID"
    ParentDataKeyNames="ReportsTo" AllowMultiItemEdit="False" Culture="(Default)"
    IsItemInserted="False">
    <Columns>
            <telerik:TreeListBoundColumn DataField="EmployeeID" HeaderText="EmployeeID" ReadOnly="true"
                UniqueName="EmployeeID">
            </telerik:TreeListBoundColumn>
            <telerik:TreeListBoundColumn DataField="LastName" HeaderText="Last Name" UniqueName="LastName">
            </telerik:TreeListBoundColumn>
            <telerik:TreeListBoundColumn DataField="FirstName" HeaderText="First Name" UniqueName="FirstName">
            </telerik:TreeListBoundColumn>
            <telerik:TreeListBoundColumn DataField="Title" HeaderText="Title" UniqueName="Title">
            </telerik:TreeListBoundColumn>
            <telerik:TreeListBoundColumn DataField="ReportsTo" ReadOnly="true" HeaderText="ReportsTo"
                UniqueName="ReportsTo">
            </telerik:TreeListBoundColumn>
            <telerik:TreeListEditCommandColumn UniqueName="EditCommandColumn">
            </telerik:TreeListEditCommandColumn>
        </Columns>
</telerik:RadTreeList>
<asp:SqlDataSource ID="SqlDataSource1" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
    SelectCommand="SELECT [EmployeeID], [LastName], [FirstName], [Title], [ReportsTo] FROM [Employees]"
    runat="server" InsertCommand="INSERT INTO [Employees] ([LastName], [FirstName], [Title], [ReportsTo]) VALUES (@LastName, @FirstName, @Title, @ReportsTo)"
    UpdateCommand="UPDATE [Employees] SET [LastName] = @LastName, [FirstName] = @FirstName, [Title] = @Title, [ReportsTo] = @ReportsTo WHERE [EmployeeID] = @EmployeeID">
    <InsertParameters>
        <asp:Parameter Name="LastName" Type="String" />
        <asp:Parameter Name="FirstName" Type="String" />
        <asp:Parameter Name="Title" Type="String" />
        <asp:Parameter Name="ReportsTo" Type="Int32" />
    </InsertParameters>
    <UpdateParameters>
        <asp:Parameter Name="LastName" Type="String" />
        <asp:Parameter Name="FirstName" Type="String" />
        <asp:Parameter Name="Title" Type="String" />
        <asp:Parameter Name="ReportsTo" Type="Int32" />
        <asp:Parameter Name="EmployeeID" Type="Int32" />
    </UpdateParameters>
</asp:SqlDataSource>

RadTreeList bound to LinqDataSource

<telerik:RadTreeList RenderMode="Lightweight" runat="server" ID="RadTreeList1" DataSourceID="LinqDataSource1"
    AllowPaging="true" PageSize="5" DataKeyNames="id" ParentDataKeyNames="parentId"
    AutoGenerateColumns="false">
    <Columns>
            <telerik:TreeListEditCommandColumn UniqueName="EditCommandColumn" ButtonType="ImageButton">
                <ItemStyle CssClass="MyImageButton" />
            </telerik:TreeListEditCommandColumn>
            <telerik:TreeListBoundColumn DataField="id" UniqueName="id" HeaderText="ID" ReadOnly="true" />
            <telerik:TreeListBoundColumn DataField="Text" UniqueName="Categories" HeaderText="Categories" />
            <telerik:TreeListBoundColumn DataField="parentid" UniqueName="parentid" HeaderText="Parent ID"
                ReadOnly="true" />
        </Columns>
</telerik:RadTreeList>
<asp:LinqDataSource runat="server" ID="LinqDataSource1" ContextTypeName="LinqToSql.TelerikSamplesDataContext"
    TableName="Links" EnableUpdate="true" EnableInsert="true">
</asp:LinqDataSource>

The following MSDN articles describe how to configure some of the more common DataSource controls:

AccessDataSource

SqlDataSource

ObjectDataSource

LinqDataSource

EntityDataSource