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Select Item

This help article showcases how to operate with the items of a RadRadioButtonList on the server side or client side.

Select Item Server Side

To select a particular item of a RadRadioButtonList, you should set the Selected property of the target item to true.

Example 1: Select a RadioButtonListItem from the markup.

<telerik:RadRadioButtonList ID="RadRadioButtonList" runat="server">
    <Items>
        <telerik:RadioButtonListItem Text="Item 1" Value="0" Selected="true" />
        <telerik:RadioButtonListItem Text="Item 2" Value="1" />
    </Items>
</telerik:RadRadioButtonList>

Example 2: Select a RadioButtonListItem from the code behind.

protected void Page_Init(object sender, EventArgs e)
{
    RadRadioButtonList1.Items[0].Selected = true;
}
Protected Sub Page_Init(sender As Object, e As EventArgs)
    RadRadioButtonList1.Items(1).Selected = True
End Sub

For a data-bound scenario you can use the SelectedIndex of the control (Example 3).

Example 3: Data bind the selected state of a RadRadioButtonList.

<telerik:RadGrid RenderMode="Lightweight" runat="server" ID="RadGrid1" Width="150px">
    <MasterTableView AutoGenerateColumns="false">
        <Columns>
            <telerik:GridTemplateColumn DataField="SelectToggleStateField" HeaderText="SelectToggleStateField">
                <ItemTemplate>
                    <telerik:RadRadioButtonList ID="RadRadioButtonList1" runat="server" SelectedIndex='<%#Eval("SelectState") %>'>
                        <Items>
                            <telerik:RadioButtonListItem Text="Item 1" Value="0" />
                            <telerik:RadioButtonListItem Text="Item 2" Value="1" />
                            <telerik:RadioButtonListItem Text="Item 3" Value="2" />
                        </Items>
                    </telerik:RadRadioButtonList>
                </ItemTemplate>
            </telerik:GridTemplateColumn>
        </Columns>
    </MasterTableView>
</telerik:RadGrid>
public void Page_Init(object sender, System.EventArgs e)
{
    if (!IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("SelectState", typeof(int));
        dt.Rows.Add(0);
        dt.Rows.Add(1);
        dt.Rows.Add(2);
        RadGrid1.DataSource = dt;
    }
}
Public Sub Page_Init(sender As Object, e As System.EventArgs)
    If Not IsPostBack Then
        Dim dt As New DataTable()
        dt.Columns.Add("SelectState", GetType(Integer))
        dt.Rows.Add(0)
        dt.Rows.Add(1)
        dt.Rows.Add(2)
        RadGrid1.DataSource = dt
    End If
End Sub
warning

The SelectedIndex property will not take effect if directly assigned with a value in the markup. The SelectedIndex property takes effect only when set from the code behind or integrated in a data-bound scenario in the markup (Example 3).

Get Selected Item Server Side

To get the selected item and selected index you can use the SelectedItem and SelectedIndex properties of the RadRadioButtonList control.

Example 4: Get SelectedIndex and SelectedItem of the RadRadioButtonList from the code behind.

<telerik:RadRadioButtonList ID="RadRadioButtonList1" runat="server" OnSelectedIndexChanged="RadRadioButtonList1_SelectedIndexChanged">
    <Items>
        <telerik:RadioButtonListItem Text="Item 1" Value="0" />
        <telerik:RadioButtonListItem Text="Item 2" Value="1" Selected="true" />
        <telerik:RadioButtonListItem Text="Item 3" Value="2" />
    </Items>
</telerik:RadRadioButtonList>
protected void RadRadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
    int selectedIndex = RadRadioButtonList1.SelectedIndex;
    RadioButtonListItem selectedradioButtonListItem = RadRadioButtonList1.SelectedItem;
}
Protected Sub RadRadioButtonList1_SelectedIndexChanged(sender As Object, e As EventArgs)
    Dim selectedIndex As Integer = RadRadioButtonList1.SelectedIndex
    Dim selectedradioButtonListItem As RadioButtonListItem = RadRadioButtonList1.SelectedItem
End Sub

The selected item reference provides all its properties (e.g., Value, Text, Selected and Enabled).

Select Item Client Side

You can select a particular item of a RadRadioButtonList by passing the corresponding index in the set_selectedIndex() method of the control, or by using the set_selected() method of the button list item.

Example 6: Select an item on the client side.

var radioButtonList = $find("<%=RadRadioButtonList1.ClientID%>");
radioButtonList.set_selectedIndex(0);

//or loop through the items, evaluate conditions and use their API
var items = radioButtonList.get_items();
for (var i = 0; i < items.length; i++) {
    if (items[i].get_value() == 1) {
        items[i].set_selected(true);
        //or, use its index
        //radioButtonList.set_selectedIndex(i);
    }
}

Get Selected Item Client Side

You can obtain the items, selected item and selected item index of RadRadioButtonList through the get_items() and get_selectedIndex() methods.

Example 7: Reference items, selected item and selected index of the RadRadioButtonList through its client-side API.

var radioButtonList = $find("<%=RadRadioButtonList1.ClientID%>");
var items = radioButtonList.get_items();
var selectedIndex = radioButtonList.get_selectedIndex();
//will return -1 if no item is selected

//loop through the items and use their API to get the selected one
var items = radioButtonList.get_items();
for (var i = 0; i < items.length; i++) {
    if (items[i].get_selected()) {
        alert(items[i].get_text());
    }
}

See Also