Using FormTemplate/UserControl

This article will introduce you to how you can proceed when updating values in RadTreeList using FormTemplate and WebUserControl edit forms. Generally, the approach is the same as when an insert operation takes place - you need to get hold of the respective edit form and then use theFindControl(controlID) method to access the controls used for editing values.

Updating values using FormTemplate

Once the UpdateCommand event of RadTreeList is fired, you can access the TreeListEditFormItem through the event arguments (e.Item).Now you only need to use the FindControl(controlId) method and extract the values from the respective controls.

ASPNET

<telerik:RadTreeList RenderMode="Lightweight" ID="RadTreeList1" runat="server" DataKeyNames="EmployeeID" ParentDataKeyNames="ReportsTo"
	AutoGenerateColumns="false" DataSourceID="SqlDataSource1" OnUpdateCommand="RadTreeList1_UpdateCommand">
	<Columns>
		<telerik:TreeListBoundColumn DataField="EmployeeID" HeaderText="EmployeeID" UniqueName="EmployeeID"
			ReadOnly="true" />
		<telerik:TreeListBoundColumn DataField="LastName" HeaderText="LastName" UniqueName="LastName" />
		<telerik:TreeListBoundColumn DataField="FirstName" HeaderText="FirstName" UniqueName="FirstName" />
		<telerik:TreeListBoundColumn DataField="HomePhone" HeaderText="HomePhone" UniqueName="HomePhone" />
		<telerik:TreeListDateTimeColumn DataField="HireDate" HeaderText="HireDate" UniqueName="HireDate" />
		<telerik:TreeListBoundColumn DataField="ReportsTo" HeaderText="ReportsTo" UniqueName="ReportsTo" ReadOnly="true" />
		<telerik:TreeListEditCommandColumn UniqueName="EditColumn" />
	</Columns>
	<EditFormSettings EditFormType="Template">
		<FormTemplate>
			<table>
				<tr>
					<td>
						FirstName:
					</td>
					<td>
						<asp:TextBox ID="TextBox1" Text='<%# Bind("FirstName") %>' runat="server">
						</asp:TextBox>
					</td>
				</tr>
				<tr>
					<td>
						Last Name:
					</td>
					<td>
						<asp:TextBox ID="TextBox2" Text='<%# Bind("LastName") %>' runat="server">
						</asp:TextBox>
					</td>
				</tr>
				<tr>
					<td>
						Home Phone:
					</td>
					<td>
						<telerik:RadMaskedTextBox RenderMode="Lightweight" ID="RadMaskedTextBox1" runat="server" SelectionOnFocus="SelectAll"
							TextWithLiterals='<%# Bind("HomePhone") %>'  Mask="(###) ###-####">
						</telerik:RadMaskedTextBox>
					</td>
				</tr>
				<tr>
					<td>
						Hire Date:
					</td>
					<td>
						<telerik:RadDatePicker RenderMode="Lightweight" ID="RadDatePicker1" DbSelectedDate='<%# Bind("HireDate") %>'
							runat="server">
						</telerik:RadDatePicker>
					</td>
				</tr>
			</table>
			<asp:Button ID="btnUpdate" Text="Update" runat="server" CommandName="Update">
			</asp:Button>&nbsp;
			<asp:Button ID="btnCancel" Text="Cancel" runat="server" CausesValidation="False"
				CommandName="Cancel"></asp:Button>
		</FormTemplate>
	</EditFormSettings>
</telerik:RadTreeList>

C#

protected void RadTreeList1_UpdateCommand(object sender, Telerik.Web.UI.TreeListCommandEventArgs e)
{
	//Canceling out the automatic datasource operation (needed if you use a datasource control)
	e.Canceled = true;

	//Accessing the TreeListEditFormItem and the DataKeyValue of the edited row
	TreeListEditFormItem editedItem = (e.Item as TreeListEditFormItem);
	string dataKeyValue = editedItem.ParentItem.GetDataKeyValue("EmployeeID").ToString();

	//Extracting the values from the edit form
	string firstName = (editedItem.FindControl("TextBox1") as TextBox).Text;
	string lastName = (editedItem.FindControl("TextBox2") as TextBox).Text;
	string homePhone = (editedItem.FindControl("RadMaskedTextBox1") as RadMaskedTextBox).TextWithLiterals;
	DateTime? hireDate = (editedItem.FindControl("RadDatePicker1") as RadDatePicker).SelectedDate;

	//Updating logic follows, this part depends on your own custom way of performing CRUD operations
	SqlDataSource1.UpdateParameters["EmployeeID"].DefaultValue = dataKeyValue;
	SqlDataSource1.UpdateParameters["LastName"].DefaultValue = lastName;
	SqlDataSource1.UpdateParameters["FirstName"].DefaultValue = firstName;
	SqlDataSource1.UpdateParameters["HomePhone"].DefaultValue = homePhone;
	SqlDataSource1.UpdateParameters["HireDate"].DefaultValue = hireDate.ToString();
	SqlDataSource1.Update();

	//Closing the edit form and rebinding the treelist control
	RadTreeList1.EditIndexes.Clear();
	RadTreeList1.Rebind();
}

VB.NET

Protected Sub RadTreeList1_UpdateCommand(ByVal sender As Object, ByVal e As Telerik.Web.UI.TreeListCommandEventArgs)
	'Canceling out the automatic datasource operation (needed if you use a datasource control)
	e.Canceled = True

	'Accessing the TreeListEditFormItem and the DataKeyValue of the edited row
	Dim editedItem As TreeListEditFormItem = TryCast(e.Item, TreeListEditFormItem)
	Dim dataKeyValue As String = editedItem.ParentItem.GetDataKeyValue("EmployeeID").ToString()

	'Extracting the values from the edit form
	Dim firstName As String = TryCast(editedItem.FindControl("TextBox1"), TextBox).Text
	Dim lastName As String = TryCast(editedItem.FindControl("TextBox2"), TextBox).Text
	Dim homePhone As String = TryCast(editedItem.FindControl("RadMaskedTextBox1"), RadMaskedTextBox).TextWithLiterals
	Dim hireDate As System.Nullable(Of DateTime) = TryCast(editedItem.FindControl("RadDatePicker1"), RadDatePicker).SelectedDate

	'Updating logic follows, this part depends on your own custom way of performing CRUD operations
	SqlDataSource1.UpdateParameters("EmployeeID").DefaultValue = dataKeyValue
	SqlDataSource1.UpdateParameters("LastName").DefaultValue = lastName
	SqlDataSource1.UpdateParameters("FirstName").DefaultValue = firstName
	SqlDataSource1.UpdateParameters("HomePhone").DefaultValue = homePhone
	SqlDataSource1.UpdateParameters("HireDate").DefaultValue = hireDate.ToString()
	SqlDataSource1.Update()

	'Closing the edit form and rebinding the treelist control
	RadTreeList1.EditIndexes.Clear()
	RadTreeList1.Rebind()
End Sub

Updating values using WebUserControl

This is also identical with inserting values using a WebUserControl. Once you get a reference to the user control, the FindControl(controlId) method comes to help.Here follows an example of how you can implement the approach for manual extraction of values.

ASPNET

<telerik:RadTreeList RenderMode="Lightweight" ID="RadTreeList2" runat="server" DataKeyNames="EmployeeID" ParentDataKeyNames="ReportsTo"
AutoGenerateColumns="false" EditMode="EditForms" DataSourceID="SqlDataSource1" OnUpdateCommand="RadTreeList2_UpdateCommand">
	<Columns>
		<telerik:TreeListBoundColumn DataField="EmployeeID" HeaderText="EmployeeID" UniqueName="EmployeeID"
			ReadOnly="true" />
		<telerik:TreeListBoundColumn DataField="LastName" HeaderText="LastName" UniqueName="LastName" />
		<telerik:TreeListBoundColumn DataField="FirstName" HeaderText="FirstName" UniqueName="FirstName" />
		<telerik:TreeListBoundColumn DataField="HomePhone" HeaderText="HomePhone" UniqueName="HomePhone" />
		<telerik:TreeListDateTimeColumn DataField="HireDate" HeaderText="HireDate" UniqueName="HireDate" />
		<telerik:TreeListBoundColumn DataField="ReportsTo" HeaderText="ReportsTo" UniqueName="ReportsTo" ReadOnly="true" />
		<telerik:TreeListEditCommandColumn UniqueName="EditColumn" />
	</Columns>
	<EditFormSettings EditFormType="WebUserControl" UserControlPath="~/WebUserControl.ascx">
	</EditFormSettings>
</telerik:RadTreeList>

C#

protected void RadTreeList2_UpdateCommand(object sender, Telerik.Web.UI.TreeListCommandEventArgs e)
{

	//Canceling out the automatic datasource operation (needed if you use a datasource control)
	e.Canceled = true;

	//Accessing the TreeListEditFormItem and the DataKeyValue of the edited row
	TreeListEditFormItem editedItem = (e.Item as TreeListEditFormItem);
	string dataKeyValue = editedItem.ParentItem.GetDataKeyValue("EmployeeID").ToString();

	//Getting reference to the user control and extracting the values in it
	UserControl userControl = (UserControl)e.Item.FindControl(GridEditFormItem.EditFormUserControlID);
	string firstName = (userControl.FindControl("TextBox1") as TextBox).Text;
	string lastName = (userControl.FindControl("TextBox2") as TextBox).Text;
	string homePhone = (userControl.FindControl("RadMaskedTextBox1") as RadMaskedTextBox).TextWithLiterals;
	DateTime? hireDate = (userControl.FindControl("RadDatePicker1") as RadDatePicker).SelectedDate;
	string reportsTo = (userControl.FindControl("TextBox3") as TextBox).Text;

	//Updating logic follows, this part depends on your own custom way of performing CRUD operations
	SqlDataSource1.UpdateParameters["EmployeeID"].DefaultValue = dataKeyValue;
	SqlDataSource1.UpdateParameters["LastName"].DefaultValue = lastName;
	SqlDataSource1.UpdateParameters["FirstName"].DefaultValue = firstName;
	SqlDataSource1.UpdateParameters["HomePhone"].DefaultValue = homePhone;
	SqlDataSource1.UpdateParameters["HireDate"].DefaultValue = hireDate.ToString();
	SqlDataSource1.UpdateParameters["ReportsTo"].DefaultValue = reportsTo;
	SqlDataSource1.Update();

	//Closing the edit form and rebinding the treelist control
	RadTreeList2.EditIndexes.Clear();
	RadTreeList2.Rebind();
}

VB.NET

Protected Sub RadTreeList2_UpdateCommand(ByVal sender As Object, ByVal e As Telerik.Web.UI.TreeListCommandEventArgs)
	'Canceling out the automatic datasource operation (needed if you use a datasource control)
	e.Canceled = True

	'Accessing the TreeListEditFormItem and the DataKeyValue of the edited row
	Dim editedItem As TreeListEditFormItem = CType(e.Item, TreeListEditFormItem)
	Dim dataKeyValue As String = editedItem.ParentItem.GetDataKeyValue("EmployeeID").ToString()

	'Getting reference to the user control and extracting the values in it
	Dim userControl As UserControl = DirectCast(e.Item.FindControl(GridEditFormItem.EditFormUserControlID), UserControl)
	Dim firstName As String = CType(userControl.FindControl("TextBox1"), TextBox).Text
	Dim lastName As String = CType(userControl.FindControl("TextBox2"), TextBox).Text
	Dim homePhone As String = CType(userControl.FindControl("RadMaskedTextBox1"), RadMaskedTextBox).TextWithLiterals
	Dim hireDate As System.Nullable(Of DateTime) = CType(userControl.FindControl("RadDatePicker1"), RadDatePicker).SelectedDate
	Dim reportsTo As String = CType(userControl.FindControl("TextBox3"), TextBox).Text

	'Updating logic follows, this part depends on your own custom way of performing CRUD operations
	SqlDataSource1.UpdateParameters("EmployeeID").DefaultValue = dataKeyValue
	SqlDataSource1.UpdateParameters("LastName").DefaultValue = lastName
	SqlDataSource1.UpdateParameters("FirstName").DefaultValue = firstName
	SqlDataSource1.UpdateParameters("HomePhone").DefaultValue = homePhone
	SqlDataSource1.UpdateParameters("HireDate").DefaultValue = hireDate.ToString()
	SqlDataSource1.UpdateParameters("ReportsTo").DefaultValue = reportsTo
	SqlDataSource1.Update()

	'Closing the edit form and rebinding the treelist control
	RadTreeList1.EditIndexes.Clear()
	RadTreeList1.Rebind()
End Sub

Again, you can configure the user control to implement the IBindable interface in order for the RadTreeList to be able to extract values:

ASPNET

<table>
	<tr>
		<td>
			FirstName:
		</td>
		<td>
			<asp:TextBox ID="TextBox1" Text='<%# DataBinder.Eval( Container, "DataItem.FirstName") %>'
				runat="server">
			</asp:TextBox>
		</td>
	</tr>
	<tr>
		<td>
			Last Name:
		</td>
		<td>
			<asp:TextBox ID="TextBox2" Text='<%# DataBinder.Eval( Container, "DataItem.LastName") %>'
				runat="server">
			</asp:TextBox>
		</td>
	</tr>
	<tr>
		<td>
			Home Phone:
		</td>
		<td>
			<telerik:RadMaskedTextBox RenderMode="Lightweight" ID="RadMaskedTextBox1" runat="server" SelectionOnFocus="SelectAll"
				TextWithLiterals='<%# DataBinder.Eval( Container, "DataItem.HomePhone") %>' Mask="(###) ###-####">
			</telerik:RadMaskedTextBox>
		</td>
	</tr>
	<tr>
		<td>
			Hire Date:
		</td>
		<td>
			<telerik:RadDatePicker RenderMode="Lightweight" ID="RadDatePicker1" DbSelectedDate='<%# DataBinder.Eval( Container, "DataItem.HireDate") %>'
				runat="server">
			</telerik:RadDatePicker>
		</td>
	</tr>
</table>
<asp:Button ID="btnUpdate" Text='<%# (Container is TreeListEditFormInsertItem) ? "Insert" : "Update" %>'
	runat="server" CommandName='<%# (Container is TreeListEditFormInsertItem) ? "PerformInsert" : "Update" %>'>
</asp:Button>&nbsp;
<asp:Button ID="btnCancel" Text="Cancel" runat="server" CausesValidation="False"
	CommandName="Cancel"></asp:Button>

C#

public partial class WebUserControl : System.Web.UI.UserControl, IBindableControl
{
	public void ExtractValues(IOrderedDictionary dictionary)
   {
	   //retrieves all RadInputs and add their values to the dictionary
	   foreach (var input in Controls.OfType<RadInputControl>().Select(control => new {FieldName = control.ID, FieldValue = control.Text}))
	   {
		   dictionary.Add(input.FieldName, input.FieldValue);
	   }
   }
   public object DataItem { get; set; }
}

VB.NET

Partial Class WebUserControlVB
	Inherits System.Web.UI.UserControl
	Implements IBindableControl

	Public Sub ExtractValues(ByVal dictionary As System.Collections.Specialized.IOrderedDictionary) Implements System.Web.UI.IBindableControl.ExtractValues
		For Each i In Controls.OfType(Of RadInputControl)().Select(Function(control) New With {.FieldName = control.ID, .FieldValue = control.Text})
			dictionary.Add(i.FieldName, i.FieldValue)
		Next
	End Sub
	Private dtItem As Object
	Public Property DataItem() As Object
		Get
			Return dtItem
		End Get
		Set(ByVal value As Object)
			dtItem = value
		End Set
	End Property

End Class