SelectionList.SelectedIndexChanged Event
Occurs whenever a user changes the selection of a SelectionList object. This API is obsolete. For information about how to develop ASP.NET mobile applications, see the www.asp.net/mobile Web site.
Assembly: System.Web.Mobile (in System.Web.Mobile.dll)
Changing the selection on the client does not generate a postback event. This event is called on the server if a postback event is generated by some other control and the selection has changed.
The following code example shows how to use the SelectedIndexChanged event. It also shows how to use the Rows property on postback to expand the list.
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The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code sample must be copied into an empty text file that has an .aspx extension. For more information, see ASP.NET Web Forms Page Syntax Overview. |
<%@ Page Language="C#" Inherits="System.Web.UI.MobileControls.MobilePage" %> <%@ Register TagPrefix="mobile" Namespace="System.Web.UI.MobileControls" Assembly="System.Web.Mobile" %> <script runat="server"> public void Page_Load(Object sender, EventArgs e) { if (!IsPostBack) { // Create data for the list ArrayList arr = new ArrayList(); arr.Add (new Task ("Verify transactions", "Done")); arr.Add (new Task ("Check balance sheet", "Scheduled")); arr.Add (new Task ("Call customer", "Done")); arr.Add (new Task ("Issue checks", "Pending")); arr.Add (new Task ("Send report", "Pending")); arr.Add (new Task ("Attend meeting", "Scheduled")); // Set properties for the list SelList1.SelectType = ListSelectType.ListBox; SelList1.Wrapping = Wrapping.NoWrap; SelList1.DataValueField = "Status"; SelList1.DataTextField = "TaskName"; SelList1.Rows = 3; // Bind the list to the data SelList1.DataSource = arr; SelList1.DataBind (); Label1.Text = "Select an item and click the button."; Label2.Text = "Tasks are arranged by priority"; } } void ShowStatus(Object sender, EventArgs e) { string statusSpec = "Status: {0} is {1}"; string prioSpec = "Priority: {0}"; // Expand the list to show all items SelList1.Rows = SelList1.Items.Count; // Display the status Label1.Text = String.Format(statusSpec, SelList1.Selection.Text, SelList1.Selection.Value); // Display the priority Label2.Text = String.Format(prioSpec, (SelList1.SelectedIndex + 1)); } // Custom class for the task data class Task { private String _TaskName; private String _Status; public Task(String TaskName, String Status) { _TaskName = TaskName; _Status = Status; } public String TaskName { get { return _TaskName; } } public String Status { get { return _Status; } } } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <body> <mobile:Form runat="server" id="Form1"> <mobile:Label runat="server" id="Label1" /> <mobile:Label runat="server" id="Label2" /> <mobile:SelectionList runat="server" id="SelList1" OnSelectedIndexChanged="ShowStatus" /> <mobile:Command ID="Command1" runat="server" Text="Show Status" /> </mobile:Form> </body> </html>
Available since 1.1
OnSelectedIndexChanged
SelectedIndex
SelectionList Class
System.Web.UI.MobileControls Namespace
ASP.NET Data Access Content Map
Introduction to the SelectionList Control
Creating New Controls
Creating Custom Mobile Controls
