aspnet-devexpress-dot-web-dot-aspxlistedit-f4181408.md
Specifies the selected list item’s index.
Namespace : DevExpress.Web
Assembly : DevExpress.Web.v25.2.dll
NuGet Package : DevExpress.Web
[DefaultValue(-1)]
public int SelectedIndex { get; set; }
<DefaultValue(-1)>
Public Property SelectedIndex As Integer
| Type | Default | Description |
|---|---|---|
| Int32 | -1 |
The zero-based index of the selected list item. -1 if no item is selected within the list editor.
|
Use the SelectedIndex property to move selection within the list editor. You can also change the selected item via the ASPxListEdit.SelectedItem property.
Handle the ASPxListEdit.SelectedIndexChanged event to respond to the selection being changed within the list editor.
If you bind (populate the Item collection) at runtime, make sure that you perform this operation during each round trip to the server in the control’s Init or Page_Init event. Otherwise, the SelectedIndex property may return -1.
protected void ASPxListBoxInstance_Init(object sender, EventArgs e) {
DevExpress.Web.ASPxEditors.ASPxListBox cmb = (DevExpress.Web.ASPxEditors.ASPxListBox)sender;
cmb.DataSource = DATA_SOURCE;
cmb.DataBindItems();
}
Protected Sub ASPxListBoxInstance_Init(sender As Object, e As EventArgs)
Dim cmb As DevExpress.Web.ASPxEditors.ASPxListBox = DirectCast(sender, DevExpress.Web.ASPxEditors.ASPxListBox)
cmb.DataSource = DATA_SOURCE
cmb.DataBindItems()
End Sub
For more information, refer to the following property description: EnableSynchronization
This example demonstrates how the ASPxSpinEdit ‘s decimal separator is automatically changed upon selecting a culture.
<asp:Label ID="Label1" runat="server" Text="Culture: " AssociatedControlID="ASPxRadioButtonList1"/>
<dx:ASPxRadioButtonList ID="ASPxRadioButtonList1" runat="server" SelectedIndex="0">
<Items>
<dx:ListEditItem Text="English (USA)" Value="en-US" />
<dx:ListEditItem Text="Italian" Value="it-IT" />
</Items>
<ClientSideEvents SelectedIndexChanged="function(s, e) {
document.location.href = "?culture=" + s.GetSelectedItem().value;
}" />
</dx:ASPxRadioButtonList>
<dx:ASPxSpinEdit ID="ASPxSpinEdit1" runat="server" Number="0.1" />
protected void Page_Load(object sender, EventArgs e) {
ASPxRadioButtonList1.SelectedIndex = GetCulture() == "en-US" ? 0 : 1;
}
protected override void InitializeCulture() {
base.InitializeCulture();
CultureInfo ci = new CultureInfo(GetCulture(), true);
System.Threading.Thread.CurrentThread.CurrentCulture = ci;
System.Threading.Thread.CurrentThread.CurrentUICulture = ci;
}
private string GetCulture() {
string culture = "en-US";
if (!string.IsNullOrEmpty(Page.Request.Params["culture"]))
culture = Page.Request.Params["culture"];
int comma = culture.IndexOf(",");
if (comma != -1)
culture = culture.Remove(comma);
return culture;
}
The following code snippets (auto-collected from DevExpress Examples) contain references to the SelectedIndex property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
web-forms-pivot-grid-change-summary-display-mode/CS/SummaryDisplayMode/Default.aspx.cs#L20
SummaryDisplayTypeGroup SelectedGroup {
get { return (SummaryDisplayTypeGroup)(rgSummaryDisplayTypeGroups.SelectedIndex); }
}
if (pivotGrid.DataSource == null) return;
if (ASPxRadioButtonList1.SelectedIndex == 0) return;
web-forms-pivot-grid-change-summary-display-mode/VB/SummaryDisplayMode/Default.aspx.vb#L28
Get
Return CType(rgSummaryDisplayTypeGroups.SelectedIndex, SummaryDisplayTypeGroup)
End Get
If pivotGrid.DataSource Is Nothing Then Return
If ASPxRadioButtonList1.SelectedIndex = 0 Then Return
' Iterates through all row headers.
See Also