c# - How to add an item to a list

Generic List Add() Method

.Net framework generic list represents a strongly typed list of objects that can be accessed by index. generic list class Add() method allow us to add an object to the end of the List<T>. this Add(T) method exists in System.Collections.Generic namespace.

this method require to pass a parameter name 'item'. this parameter value type is 'T'. parameter 'T' represents the object to be added to the end of the List<T>. this parameter value can be null for reference types and it allow duplicate elements. this method implements as ICollection<T>.Add(T).

the following asp.net c# example code demonstrate us how can we add an object to the end of generic list in an asp.net application.

GenericListAddMethod.aspx


<%@ Page Language="C#" AutoEventWireup="true" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    protected void Button1_Click(object sender, System.EventArgs e)
    {
        List<string> colors = new List<string>();
        colors.Add("IndianRed");
        colors.Add("Magenta");
        colors.Add("DarkSeaGreen");
        colors.Add("Pink");

        BulletedList1.DataSource = colors;
        BulletedList1.DataBind();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Generic List - How to add an object to the end of List</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Crimson; font-style:italic;">
            System.Collections.Generic.List Add() method
            <br /> How to add an object to the end of List
        </h2>
        <hr width="425" align="left" color="Pink" />
        <asp:BulletedList
             ID="BulletedList1"
             runat="server"
             Width="400"
             BackColor="SeaGreen"
             ForeColor="Snow"
             Font-Size="X-Large"
             >
        </asp:BulletedList>
        <br />
        <asp:Button 
            ID="Button1"
            runat="server"
            OnClick="Button1_Click"
            Text="Create Generic List And Add Objects And Populate BulletedList"
            Height="45"
            Font-Bold="true"
            ForeColor="DodgerBlue"
            />
    </div>
    </form>
</body>
</html>

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