Creating a Treeview Programmatically

This topic shows how to add treeview items and subtreeview items through code.

To add a PlaceHolder control and add a reference to the C1.Web.Command assembly, complete the following:

1. Add a PlaceHolder control to the web page.

2. Import the C1.Web.Command namespace to your source code.

· Visual Basic

Imports C1.Web.Command

· C#

using C1.Web.Command;

· Delphi

uses C1.Web.Command;

3. To programmatically create a root and parent item for C1WebTreeView, complete the following:

· Visual Basic

'First create an instance of the class

Dim treeview As New C1WebTreeView()

'Add the C1WebTreeView control to the PlaceHolder control

PlaceHolder1.Controls.Add(treeview)

'create the C1WebTreeViewItem

Dim item As C1WebTreeViewItem

treeview.Items.Add(New C1WebTreeViewItem("Root Item", "RightFrame.aspx?key=Root Item"))

treeview.Items.Add(New C1WebTreeViewItem("Parent Item"))

· C#

//Create an instance of the class

C1WebTreeView treeview = new C1WebTreeView();

//Add the C1WebTreeView control to the PlaceHolder control

PlaceHolder1.Controls.Add(treeview);

C1WebTreeViewItem item;

treeview.Items.Add(new C1WebTreeViewItem("Root Item", "RightFrame.aspx?key=Root Item"));

treeview.Items.Add(new C1WebTreeViewItem("Parent Item"));

· Delphi

var

item: C1WebTreeViewItem;

treeview: C1WebTreeView;

begin

treeview := C1WebTreeView.Create;

//Add the C1WebTreeView control to the PlaceHolder control

PlaceHolder1.Controls.Add(treeview)

PlaceHolder1.Controls.Add(treeview);

treeview.Items.Add(C1WebTreeViewItem.Create('Root Item', 'RightFrame.aspx?key=Root Item'));

treeview.Items.Add(C1WebTreeViewItem.Create('Parent Item'));

end;

4. To create a C1WebTreeViewGroup and a SubTreeViewItem, use the following code:

· Visual Basic

'Add the SubTree

item = CType(treeview.Items(1), C1WebTreeViewItem)

' Create subtreeview

item.CreateChildGroup()

' Add subtreeview items under "Parent Item"

item.ChildGroup.Items.Add(New C1WebTreeViewItem("Child Item"))

· C#

//Add the SubTree

item = (C1WebTreeViewItem)treeview.Items[1];

// Create subtreeview

item.CreateChildGroup();

// Add subtreeview items under "Parent Item"

item.ChildGroup.Items.Add(new C1WebTreeViewItem("Child Item"));

· Delphi

begin

//Add the SubTree

item := (C1WebTreeViewItem)treeview.Items[1];

item.CreateChildGroup;

item.ChildGroup.Items.Add(C1WebTreeViewItem.Create('Child Item'));

end;