Introduction
Today, in this article let's play around with one of the interesting and most
useful concept in LINQ.
Question: What are these?
Please refer to the below table:
![Image1.png]()
Step 1: Create a new WebForm project
![Image2.jpg]()
Step 2: The complete code of WebForm1.aspx looks like this
<%@
Page Language="C#"
AutoEventWireup="true"
CodeBehind="WebForm1.aspx.cs"
Inherits="LAST_LASTorDefaultLINQApp.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
id="Head1" runat="server">
<style type="text/css">
.grid
{
margin-top: 50px;
}
</style>
<title></title>
</head>
<body>
<form id="form1"
runat="server">
<center>
<div>
<table>
<tr>
<td
colspan="2"
align="center">
<asp:Label
ID="Label1"
runat="server"
Text="Play
with Last/LastOrDefault using LINQ"
Font-Bold="true"
Font-Size="Large"
Font-Names="Verdana"
ForeColor="Maroon"></asp:Label>
</td>
</tr>
<tr>
<td
colspan="2"
align="center">
<asp:Button
ID="Button1"
runat="server"
Text="Last()"
Font-Names="Verdana"
Width="213px"
BackColor="Orange"
Font-Bold="True"
OnClick="Button1_Click"
/>
</td>
</tr>
<tr>
<td
colspan="2"
align="center">
<asp:Button
ID="Button2"
runat="server"
Text="LastOrDefault()"
Font-Names="Verdana"
Width="213px"
BackColor="Orange"
Font-Bold="True"
OnClick="Button2_Click"
/>
</td>
</tr>
<tr>
<td
colspan="2"
align="center">
<asp:GridView
ID="GridView1"
runat="server"
CssClass="grid"
BackColor="LightGoldenrodYellow"
BorderColor="Tan"
BorderWidth="1px"
CellPadding="2"
ForeColor="Black"
GridLines="None">
<AlternatingRowStyle
BackColor="PaleGoldenrod"
/>
<FooterStyle
BackColor="Tan"
/>
<HeaderStyle
BackColor="Tan"
Font-Bold="True"
/>
<PagerStyle
BackColor="PaleGoldenrod"
ForeColor="DarkSlateBlue"
HorizontalAlign="Center"
/>
<SelectedRowStyle
BackColor="DarkSlateBlue"
ForeColor="GhostWhite"
/>
<sortedascendingcellstyle
backcolor="#FAFAE7"
/>
<sortedascendingheaderstyle
backcolor="#DAC09E"
/>
<sorteddescendingcellstyle
backcolor="#E1DB9C"
/>
<sorteddescendingheaderstyle
backcolor="#C2A47B"
/>
</asp:GridView>
</td>
</tr>
</table>
</div>
</center>
</form>
</body>
</html>
Step 3: The complete code of WebForm1.aspx.cs looks like this
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
namespace
LAST_LASTorDefaultLINQApp
{
public partial
class WebForm1 : System.Web.UI.Page
{
protected void
Page_Load(object sender,
EventArgs e)
{
}
protected void
Button1_Click(object sender,
EventArgs e)
{
var query =
objEntities.Employee.ToList<Employee>().Last();
var querylist = new
List<Employee>
{
query
};
GridView1.DataSource = querylist;
GridView1.DataBind();
}
protected void
Button2_Click(object sender,
EventArgs e)
{
var query =
objEntities.Employee.ToList<Employee>().LastOrDefault();
var querylist = new
List<Employee>
{
query
};
GridView1.DataSource = querylist;
GridView1.DataBind();
}
#region
Instance Members
CompanyEntities
objEntities = new CompanyEntities();
#endregion
}
}
Step 4: The output of the application looks like this
![Image3.jpg]()
Step 5: The Last () operation output of the application looks like this
![Image4.jpg]()