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 = newSqlConnection();
con.ConnectionString =ConfigurationManager.ConnectionStrings["ConnectionString"].ToString ();
con.Open ();
Step-2 : Create a SqlCommand Object for retrieving data columns and data rows.
SqlCommand cmd = newSqlCommand();
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 = newSqlDataAdapter(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
<%@ PageLanguage="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 voidPage_Load(object sender, EventArgs e)
{
}
protected voidButton1_Click(object sender, EventArgs e)
{
SqlConnection con = newSqlConnection();
con.ConnectionString =ConfigurationManager.ConnectionStrings ["ConnectionString"].ToString ();
con.Open ();
SqlCommand cmd = newSqlCommand();
cmd.CommandText = "select * from deltable";
cmd.Connection = con;
SqlDataAdapter da = newSqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "deltable");
GridView1.DataSource = ds;
GridView1.DataBind();
}
}
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