ASP.NET Tutorial/HTML Controls/select
Select server changed event
<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="ChangeEvents" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">
<title>Change Events</title>
</head> <body>
<form id="form1" runat="server" >
<select runat="server"
id="List1"
size="5" multiple
Name="List1"
onserverchange="List1_ServerChange">
<option>Option 1</option>
<option>Option 2</option>
</select>
<input type="text"
runat="server"
ID="Textbox1"
Size="10"
Name="Textbox1"
OnServerChange="Ctrl_ServerChange">
<input type="checkbox"
runat="server"
ID="Checkbox1"
Name="Checkbox1"
OnServerChange="Ctrl_ServerChange">Option text
<input type="submit"
runat="server"
ID="Submit1"
Name="cmdSubmit"
value="Submit Query"
onserverclick="Submit1_ServerClick">
</form>
</body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class ChangeEvents : System.Web.UI.Page {
protected void Page_Load(object sender, System.EventArgs e)
{
if (!Page.IsPostBack)
{
List1.Items.Add("Option 3");
List1.Items.Add("Option 4");
List1.Items.Add("Option 5");
}
}
protected void Ctrl_ServerChange(object sender, System.EventArgs e)
{
Response.Write(" }
protected void List1_ServerChange(object sender, EventArgs e)
{
Response.Write("");
foreach (ListItem li in List1.Items)
{
if (li.Selected)
Response.Write(" - " + li.Value + "
");
}
}
protected void Submit1_ServerClick(object sender, EventArgs e)
{
Response.Write("}
}</source>
