How to use LINQ Generation operators in ASP.NET

Introduction

The Generation operators help in creating a new sequence of values. The Generation operators are DefaultlfEmpty, Empty, Range, and Repeat. The DefaultlfEmpty clause replaces an empty collection with a default single collection. The Empty clause refers to an empty collection. The Range clause generates a collection that contains a sequence of numbers. The Repeat clause generates a collection that contains at least one repeated value.
The syntax of Range clause is:
For C#
public static IEnumerable<int> Range( int start, int count);
The Range clause throws an ArgumentOutOfRangeException exception if the count is less than 0, or if the start + or count -1 parameters are larger than the maximum value.
The syntax of the Empty clause is:
For C#
public static IEnumerable<T> Empty<T>();
The Empty clause caches a single empty sequence of the given type.

Lets take an simple example

<form id="form1" runat="server">
    <div>
    
        <asp:ListBox ID="ListBox1" runat="server" Height="254px" Width="153px">
        </asp:ListBox>
        <br />
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" 
            Text="odd and even " />
    
    </div>
    </form>
Code Behind 
protected void Button1_Click(object sender, EventArgs e)
    {
        var num = from n in Enumerable.Range(1, 20)
                  select new { Number = n, oddevennumber = n % 2 == 1 ? "odd" : "even" };
        foreach (var item in num)
        {
            ListBox1.Items.Add("The number is " + item.Number + item.oddevennumber);
            
        }
    }
Code Generate the following output
How to use LINQ Generation operators in ASP.NET

How to use LINQ Generation operators in ASP.NET How to use LINQ Generation operators in ASP.NET Reviewed by Jacob Lefore on April 27, 2014 Rating: 5

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