ListControl.SelectedItem Property

 

Gets the selected item with the lowest index in the list control.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

<BrowsableAttribute(False)>
Public Overridable ReadOnly Property SelectedItem As ListItem

Property Value

Type: System.Web.UI.WebControls.ListItem

The lowest indexed item selected from the list control. The default is null.

If the list control allows only a single selection, use this property to get the individual properties of the selected item. If the list control allows multiple selections, use this property to get the properties of the lowest indexed item selected from the list control.

The following example demonstrates how to use SelectedItem to get the individual properties of the currently selected item in the RadioButtonList and to display that item and its value.

<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
 <script language="vb" runat="server">

    Function CreateDataSource() As ICollection
        Dim dt As New DataTable()
        Dim dr As DataRow

        dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
        dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
        dt.Columns.Add(New DataColumn("DateTimeValue", GetType(DateTime)))
        dt.Columns.Add(New DataColumn("BoolValue", GetType(Boolean)))
        dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double)))

        Dim i As Integer
        For i = 0 To 8
            dr = dt.NewRow()

            dr(0) = i
            dr(1) = "Item " + i.ToString()
            dr(2) = DateTime.Now
            If (i Mod 2) <> 0 Then
                dr(3) = True
            Else
                dr(3) = False
            End If
            dr(4) = 1.23 *(i + 1)

            dt.Rows.Add(dr)
        Next i

        Dim dv As New DataView(dt)
        Return dv
    End Function

    Sub Page_Load(sender As Object, e As EventArgs)
        If Not IsPostBack Then
            RadioButtonList1.DataSource = CreateDataSource()
            RadioButtonList1.DataTextField = "StringValue"
            RadioButtonList1.DataValueField = "CurrencyValue"
            RadioButtonList1.DataBind()
        End If
    End Sub

    Sub Index_Changed(sender As Object, e As EventArgs)        
        Label1.Text = "You selected " & RadioButtonList1.SelectedItem.Text & _
            " with a value of : " & RadioButtonList1.SelectedItem.Value & "."
    End Sub

 </script>

 <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>

    <form id="form1" runat="server">

       <asp:RadioButtonList id="RadioButtonList1" 
            OnSelectedIndexChanged="Index_Changed"
            AutoPostBack="true"
            runat="server"/>

       <br />

       <asp:Label id="Label1" runat="server"/>

    </form>

 </body>
 </html>

.NET Framework
Available since 1.1
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