search this blog [2700+ asp.net c# examples]

Loading...

Remove multiple list items from ListBox in asp.net c#

asp.net ListBox: how to remove multiple list items programmatically
ListBoxRemoveMultipleItems.aspx 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ListBoxRemoveMultipleItems.aspx.cs" Inherits="ListBoxRemoveMultipleItems" %>

<!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>asp.net ListBox: how to remove multiple list items programmatically</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Green">ListBox: Remove Multiple List Items</h2>
        <asp:Label 
            ID="label1"
            runat="server"
            ForeColor="DarkSalmon"
            Font-Italic="true"
            Font-Size="Medium"
            >
        </asp:Label>
        <br />
        <asp:ListBox 
            ID="ListBox1"
            runat="server"
            ForeColor="White"
            BackColor="Crimson"
            SelectionMode="Multiple"
            >
            <asp:ListItem>Crimson</asp:ListItem>
            <asp:ListItem>DarkSalmon</asp:ListItem>
            <asp:ListItem>OrangeRed</asp:ListItem>
            <asp:ListItem>Green</asp:ListItem>
            <asp:ListItem>White</asp:ListItem>
        </asp:ListBox>
        <br />
        <asp:Button 
            ID="Button1" 
            runat="server"
            Text="Remove selected Item(s)"
            OnClick="Button1_Click"
            ForeColor="DarkSalmon"
            Font-Bold="true"
            />
    </div>
    </form>
</body>
</html>
ListBoxRemoveMultipleItems.aspx.cs 
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class ListBoxRemoveMultipleItems : System.Web.UI.Page
{
    protected void Button1_Click(object sender, EventArgs e)
    {
        label1.Text = "Items removed:";
        ArrayList itemList = new ArrayList();

        foreach (ListItem li in ListBox1.Items) 
        {
            if (li.Selected == true)
            {
                itemList.Add(li.Text.ToString());
            }
        }

        for (int i = 0; i < itemList.Count; i++) 
        {
            string currentItem =(string) itemList[i];
            ListItem li = new ListItem();
            li.Text = currentItem;
            ListBox1.Items.Remove(li);
            label1.Text += " " + currentItem;
        }
    }
}








Related asp.net example
Labels: