DropDownList Selected Item
To retrieve
1. selected item Text :- DropDownList1.SelectedIndex.Text
2. selected item Value :- DropDownList1.SelectedIndex.value or DropDownList1.SelectedValue
3. selected item index :- DropDownList1.SelectedIndex
The SelectedIndex and SelectedValue properties of the Dropdownlist can also be used to have list item selected in the Dropdownlist.
Example:
WebForm1.aspx :-
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="_21_dropdownlist.WebForm1" %>
<!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">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Value="-1">Select</asp:ListItem>
<asp:ListItem Value="1">Asia</asp:ListItem>
<asp:ListItem Value="2">Europe</asp:ListItem>
<asp:ListItem Value="3">Africa</asp:ListItem>
</asp:DropDownList>
<br />
<br />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
</div>
</form>
</body>
</html>
WebForm1.aspx.cs :-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace _21_dropdownlist
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)//Only during be the Initial page load when the page first load
{
DropDownList1.SelectedIndex = 1; //Asia will be selected by default
//DropDownList1.SelectedValue = "1";
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (DropDownList1.SelectedValue == "-1")
Response.Write("Plese select the Country");
else
{
Response.Write("Text is "+DropDownList1.SelectedItem.Text+"<br/>");
Response.Write("Value is "+DropDownList1.SelectedItem.Value + "<br/>");
Response.Write("Index is "+DropDownList1.SelectedIndex + "<br/>");
}
}
}
}
No comments:
Post a Comment