RadControls for ASP.NET AJAX RadListBox supports binding to all ASP.NET 2.0/3.5 DataSource components, including
AccessDataSource
SqlDataSource
XmlDataSource
ObjectDataSource
LinqDataSource
EntityDataSource
OpenAccessDataSource
To bind to a DataSource component, all you need to do is set the DataSourceID property of the ListBox to the ID of the DataSource component. You should also set the DataTextField and DataValueField properties of the ListBox to map the Text and Value properties of the items to the respective columns/fields from the data source.
If you need to map additional columns from the data source to properties of the ListBox items, you can use the ItemDataBound event. The event arguments passed to the event, e.Item and e.Item.DataItem, hold the instance of the ListBox item being bound and the DataItem to which it is bound. You can map a property from the DataItem to the corresponding property of the ListBox item. Be sure to cast the DataItem object to the proper data type first.
CopyC#
protected void RadListBox1_ItemDataBound(object sender, RadListBoxItemEventArgs e)
{
DataRowView dataSourceRow = (DataRowView)e.Item.DataItem;
e.Item.Enabled = (bool)dataSourceRow["Enabled"];
e.Item.ToolTip = dataSourceRow["ProductName"].ToString();
e.Item.Attributes["City"] = dataSourceRow["CityColumn"].ToString();
}CopyVB.NET
Protected Sub RadListBox1_ItemDataBound(ByVal sender As Object, ByVal e As RadListBoxItemEventArgs)
Dim dataSourceRow As DataRowView = DirectCast(e.Item.DataItem, DataRowView)
e.Item.Enabled = DirectCast(dataSourceRow("Enabled"), Boolean)
e.Item.ToolTip = dataSourceRow("ProductName").ToString()
e.Item.Attributes("City") = dataSourceRow("CityColumn").ToString()
End Sub
AccessDataSource
CopyASPX
<telerik:RadListBox ID="RadListBox1"
runat="server"
DataTextField="Name"
DataValueField="ID"
DataSourceID="AccessDataSource1">
</telerik:RadListBox>
<asp:AccessDataSource ID="AccessDataSource1" runat="server"
DataFile="~/App_Data/Countries.mdb"
SelectCommand="SELECT [ID], [Name] FROM [Countries]">
</asp:AccessDataSource>SqlDataSource
CopyASPX
<telerik:RadListBox ID="RadListBox1"
runat="server"
DataTextField="ProductName"
DataValueField="ProductID"
DataSourceID="SqlDataSource1">
</telerik:RadListBox>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<$ ConnectionStrings>"
SelectCommand="SELECT [ProductID], [ProductName] FROM [Products]">
</asp:SqlDataSource>
XmlDataSource
CopyASPX
<telerik:RadListBox ID="RadListBox1"
runat="server"
DataTextField="Text"
DataValueField="Value"
DataSourceID="XmlDataSource1">
</telerik:RadListBox>
<asp:XmlDataSource ID="XmlDataSource1"
runat="server"
DataFile="~/ListBox.xml">
</asp:XmlDataSource>
When using an XmlDataSource, the XML file should have the format shown below:
CopyXML
<Items>
<Item Text="New York" Value="1" />
<Item Text="Paris" Value="2" />
<Item Text="London" Value="3" />
</Items>ObjectDataSource
CopyASPX
<telerik:RadListBox ID="RadListBox1"
runat="server"
DataTextField="Text"
DataValueField="ID"
DataSourceID="ObjectDataSource1">
</telerik:RadListBox>
<asp:ObjectDataSource ID="ObjectDataSource1"
TypeName="ListObjectData"
SelectMethod="GetItems"
runat="server">
</asp:ObjectDataSource>CopyC#
public class ListObjectData
{
public ListObjectData()
{
}
public static List<ListDataItem> GetItems()
{
List<ListDataItem> itemsList = new List<ListDataItem>();
itemsList.Add(new ListDataItem(1, "item 1"));
itemsList.Add(new ListDataItem(2, "item 2"));
itemsList.Add(new ListDataItem(3, "item 3"));
return itemsList;
}
public class ListDataItem
{
private string _text;
private int _id;
public string Text
{
get { return _text; }
set { _text = value; }
}
public int ID
{
get { return _id; }
set { _id = value; }
}
public ListDataItem(int id, string text)
{
_id = id;
_text = text;
}
}
}CopyVB.NET
Public Class ListObjectData
Public Sub New()
End Sub
Public Shared Function GetItems() As List(Of ListDataItem)
Dim itemsList As New List(Of ListDataItem)()
itemsList.Add(New ListDataItem(1, "item 1"))
itemsList.Add(New ListDataItem(2, "item 2"))
itemsList.Add(New ListDataItem(3, "item 3"))
Return itemsList
End Function
Public Class ListDataItem
Private _text As String
Private _id As Integer
Public Property Text() As String
Get
Return _text
End Get
Set(ByVal value As String)
_text = value
End Set
End Property
Public Property ID() As Integer
Get
Return _id
End Get
Set(ByVal value As Integer)
_id = value
End Set
End Property
Public Sub New(ByVal id As Integer, ByVal text As String)
_id = id
_text = text
End Sub
End Class
End ClassLinqDataSource
CopyASPX
<telerik:RadListBox ID="RadListBox1"
runat="server"
DataTextField="ProductName"
DataValueField="ProductID"
DataSourceID="LinqDataSource1">
</telerik:RadListBox>
<asp:LinqDataSource ID="LinqDataSource1" runat="server"
ContextTypeName="NorthwindDataContext"
Select="new (ProductID, ProductName)"
TableName="Products">
</asp:LinqDataSource>EntityDataSource
CopyASPX
<telerik:RadListBox runat="server" ID="RadListBox1" Height="200px" Width="200px"
DataSourceID="EntityDataSource1" DataTextField="ContactName">
</telerik:RadListBox>
<asp:EntityDataSource ID="EntityDataSource1" runat="server"
ConnectionString="name=NorthwindEntities"
DefaultContainerName="NorthwindEntities"
EntitySetName="Customers"
Select="it.[ContactName], it.[City], it.[ContactTitle]"
AutoPage="true" OrderBy="it.[ContactName]">
</asp:EntityDataSource>See Also