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How to use SqlDataAdapter Class in ASP.NET

Introduction

Represents a set of data commands and a database connection that are used to fill the DataSet and update a SQL Server database(according to msdn library). You can say that retrieved table load into DataSet.

Represents a set of data commands and a database connection that are used to fill the DataSet

SqlDataAdapter class contains different parameter or non parameter constructor such as 

SqlDataAdapter( ) // you can initiate a new instance of SqlDataAdapter class.
SqlDataAdapter(SqlCommand instance) //you can specify SqlCommand instance into the SqlDataAdapter.

Lets take a simple example to take a SqlCommand instance for retrieving data from the database and these object pass to SqlDataAdapter object.

Algorithm

Step-1 : Create a SqlConnection class object  for connecting database server.

SqlConnection con = new SqlConnection();
        con.ConnectionString =ConfigurationManager.ConnectionStrings["ConnectionString"].ToString ();

        con.Open ();


Step-2 : Create a SqlCommand Object for retrieving data columns and data rows.

SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from deltable";

        
Step-3 : Connect SqlCommand to SqlConnection.

cmd.Connection = con;

Step-4 : Create SqlDataAdapter Object.
Step-5 : Pass SqlCommand instance to SqlDataAdapter object.

SqlDataAdapter da = new SqlDataAdapter(cmd);

Step-6 : Create DataSet Object.

DataSet ds = new DataSet();

Step-7 : Fill DataSet by SqlDataAdapter using fill( ) method.

da.Fill(ds, "deltable");

Step-8 : Bind GridView or any other datacontrol from DataSet.

  GridView1.DataSource = ds;

        GridView1.DataBind();

Complete code

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="binding.aspx.cs" Inherits="binding" %>

<!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></title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="GetData"
        Width="123px" />
    <br />
    <div>
   
        <asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
   
    </div>
    </form>
</body>

</html>
Codebehind

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;

public partial class binding : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection();
        con.ConnectionString =ConfigurationManager.ConnectionStrings ["ConnectionString"].ToString ();
        con.Open ();

        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from deltable";
        cmd.Connection = con;
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds, "deltable");
        GridView1.DataSource = ds;
        GridView1.DataBind();



    }
}
Output
How to use SqlDataAdapter Class in ASP.NET

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