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.
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;
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();
}
}
