ASPxTreeList Class

Represents a server ASPxTreeList control.

Namespace : DevExpress.Web.ASPxTreeList

Assembly : DevExpress.Web.ASPxTreeList.v25.2.dll

Declaration

C#
VB.NET

csharp

public class ASPxTreeList :
    ASPxDataWebControl,
    IWebColumnsOwner,
    IPagerOwner,
    IControlDesigner,
    IBasePrintable,
    ITreeListExportOwner,
    IPopupFilterControlOwner,
    IFilterControlRowOwner,
    IFilterControlOwner,
    IPopupFilterControlStyleOwner,
    IHeaderFilterPopupOwner,
    ISkinOwner,
    IPropertiesOwner,
    IFilterHelperOwner,
    IBatchEditHelperOwner,
    IPostBackValueSecureValidationOwner,
    ITreeListDataGuardInfoProvider,
    IDataGuardInfoProvider

Public Class ASPxTreeList
    Inherits ASPxDataWebControl
    Implements IWebColumnsOwner,
               IPagerOwner,
               IControlDesigner,
               IBasePrintable,
               ITreeListExportOwner,
               IPopupFilterControlOwner,
               IFilterControlRowOwner,
               IFilterControlOwner,
               IPopupFilterControlStyleOwner,
               IHeaderFilterPopupOwner,
               ISkinOwner,
               IPropertiesOwner,
               IFilterHelperOwner,
               IBatchEditHelperOwner,
               IPostBackValueSecureValidationOwner,
               ITreeListDataGuardInfoProvider,
               IDataGuardInfoProvider

The following members return ASPxTreeList objects:

Library	Related API Members
ASP.NET Web Forms Controls	ASPxTreeListExporter.TreeList
TreeListColumn.TreeList
TreeListColumnCollection.TreeList
TreeListTemplateContainerBase.TreeList
ASP.NET MVC Extensions	MVCxTreeListExporter.TreeList

Remarks

The ASPxTreeList is a multi-purpose data visualization control that can display information as a tree or grid - either in data-bound or unbound mode.

The ASPxTreeList provides the following key features

Note

The ASPxTreeList control provides you with a comprehensive client-side functionality implemented using JavaScript code:

The control’s client-side equivalent is represented by the ASPxClientTreeList object.
On the client side, the client object can be accessed directly by the name specified via the ASPxTreeList.ClientInstanceName property.
The available client events can be accessed by using the ASPxTreeList.ClientSideEvents property.

The client-side API is always available for this control.

Example

In markup:

ASPX

aspx

<dx:ASPxTreeList ID="ASPxTreeList1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" KeyFieldName="ProductID">
  <Columns>
      <dx:TreeListTextColumn AutoFilterCondition="Default" FieldName="ProductName" ShowInFilterControl="Default" VisibleIndex="0">
      </dx:TreeListTextColumn>
      <dx:TreeListTextColumn AutoFilterCondition="Default" FieldName="UnitPrice" ShowInFilterControl="Default" VisibleIndex="1">
      </dx:TreeListTextColumn>
  </Columns>
</dx:ASPxTreeList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=F:\Docs\DB\nwind.mdb"
    ProviderName="System.Data.OleDb" SelectCommand="SELECT [ProductID], [ProductName], [UnitPrice] FROM [Products]">
</asp:SqlDataSource>

Programmatically:

ASPX

aspx

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=F:\Docs\DB\nwind.mdb"
    ProviderName="System.Data.OleDb" SelectCommand="SELECT [ProductID], [ProductName], [UnitPrice] FROM [Products]">
</asp:SqlDataSource>

csharp

using DevExpress.Web.ASPxTreeList;

protected void Page_Load(object sender, EventArgs e)
{
    ASPxTreeList treeList = new ASPxTreeList();
    treeList.ID = "ASPxTreeList1";
    Page.Form.Controls.Add(treeList);
    treeList.Columns.Add(new TreeListDataColumn("ProductID"));
    treeList.Columns.Add(new TreeListDataColumn("ProductName"));
    treeList.Columns.Add(new TreeListDataColumn("UnitPrice"));
    treeList.AutoGenerateColumns = false;
    treeList.KeyFieldName = "ProductID";

    treeList.DataSourceID = "SqlDataSource1";
    treeList.DataBind();
}