Introduction

Question: What is select data with LINQ using XSD?

In simple terms "It enables selection of data using XSD with LINQ queries".

Step 1: Create a new webform project:

Output0.png

Step 2: Add a new XSD dataset item:

Output1.png

Step 3: Add a new employee table to the dataset:

Output2.png

Step 4: The complete code of webform1.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="LINQtoXSDSelectApp.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="Select Data with LINQ using XSD (DataSet)"
 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="Select Data" Font-Names="Verdana" Width="213px"
 BackColor="Orange" Font-Bold="True" OnClick="Button1_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 5: 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 LINQtoXSDSelectApp
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
EmployeeDS.EmployeeDataTable objEmployeeTable = objAdapter.GetData();
var query = from r in objEmployeeTable select new
{
FirstName = r.FirstName, LastName = r.LastName, Age = r.Age };
GridView1.DataSource = query;
GridView1.DataBind();
}
 #region Instance MembersEmployeeDSTableAdapters.EmployeeTableAdapter
objAdapter = new EmployeeDSTableAdapters.EmployeeTableAdapter();
 #endregion
 }
}

Step 6: The output of the application looks like this:

Output3.png

Step 7: The select output operation of the application looks like this:

Output4.png

Question: What is delete data with LINQ using XSD?

In simple terms "It enables data to be deleted using XSD with LINQ queries".

Step 1: Create a new webform project

Step 2: Add a new XSD dataset item

Step 3: Add a new employee table to the dataset:

Output3 (1).png

Step 4: The complete code of webform1.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="LINQtoXSDDeleteApp.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="Delete Data with LINQ using XSD (DataSet)"
 Font-Bold="true" Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>
 </td>
 </tr>
 <tr>
 <td>
 <asp:Label ID="Label2" runat="server" Text="Please Enter Employee Id" ForeColor="Brown"
 Font-Bold="true" Font-Size="Medium" Font-Names="Verdana"></asp:Label>
 </td>
 <td>
 <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
 </td>
 </tr>
 <tr>
 <td colspan="2" align="center">
 <asp:Button ID="Button1" runat="server" Text="Delete Data" Font-Names="Verdana" Width="213px"
 BackColor="Orange" Font-Bold="True" OnClick="Button1_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>
 <tr>
 <td colspan="2" align="center">
 <asp:Label ID="Label3" runat="server" Font-Bold="true" Font-Size="Medium" Font-Names="Verdana"></asp:Label>
 </td>
 </tr>
 </table>
 </div>
 </center>
 </form>
</body>
</html>

Step 5: 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 LINQtoXSDDeleteApp
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(TextBox1.Text))
{
Label3.Text = "Please Enter Some Values";
Label3.ForeColor = System.Drawing.Color.Red;
}
else
 {
objAdapter.Delete(int.Parse(TextBox1.Text));
EmployeeDS.EmployeeDataTable objEmployeeTable = objAdapter.GetData();
var query = from r in objEmployeeTable select new
{
FirstName = r.FirstName, LastName = r.LastName, Age = r.Age };
GridView1.DataSource = query;
}
GridView1.DataBind();
Label3.Text = "Records Deleted Successfully";
Label3.ForeColor = System.Drawing.Color.Green;T
extBox1.Text = string.Empty;
}
}
 #region Instance MembersEmployeeDSTableAdapters.EmployeeTableAdapter
objAdapter = new EmployeeDSTableAdapters.EmployeeTableAdapter();
 #endregion
 }
}

Step 6: The output of the application looks like this:

Output4 (1).png

Step 7: The data deleted output of the application looks like this:

Output5.png

I hope this article is useful for you.. I look forward for your comments and feedback..Thanks Vijay Prativadi