Show data in Gridview using dataset, datatable and data reader.

In this blog we will know how to show data in Gridview using dataset, datatable and data reader.

 

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

 

<!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>Untitled Page</title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

   

    </div>

    <asp:GridView ID="GridView1" runat="server">

    </asp:GridView>

    <asp:Button ID="Button1" runat="server" onclick="Button1_Click"

        Text="Using Dataset" />

    <asp:Button ID="Button2" runat="server" onclick="Button2_Click"

        Text="Using Datatable" />

    <asp:Button ID="Button3" runat="server" onclick="Button3_Click"

        Text="Using Datareader" />

    </form>

</body>

</html>

 

 

using System;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.Data.OleDb;

public partial class _Default : System.Web.UI.Page

{

    OleDbConnection con;

    OleDbCommand com;

    OleDbDataAdapter oda;

    DataSet ds;

    DataTable dataTable;

   

    protected void Button1_Click(object sender, EventArgs e)

    {

        con = new OleDbConnection("Provider = Microsoft.Jet.OLEDB.4.0; Data Source = D:\\mydb.mdb");

        com = new OleDbCommand("Select * from emp", con);

        con.Open();

        oda = new OleDbDataAdapter(com);

        ds = new DataSet();

        oda.Fill(ds, "emp");

        con.Close();

        GridView1.DataMember = "emp";

        GridView1.DataSource = ds;

        GridView1.DataBind();

    }

    protected void Button2_Click(object sender, EventArgs e)

    {

        con = new OleDbConnection("Provider = Microsoft.Jet.OLEDB.4.0; Data Source = D:\\mydb.mdb");

        dataTable = new DataTable();

        com = new OleDbCommand();

        com.Connection = con;

        con.Open();

        com.CommandText = "Select * from emp";

        oda = new OleDbDataAdapter(com);

        oda.Fill(dataTable);

        con.Close();

        GridView1.DataSource = dataTable;

        GridView1.DataMember = "emp";

        GridView1.DataBind();

    }

    protected void Button3_Click(object sender, EventArgs e)

    {

        con = new OleDbConnection("Provider = Microsoft.Jet.OLEDB.4.0; Data Source = D:\\mydb.mdb");

        com = new OleDbCommand("Select * from emp", con);

        con.Open();

        OleDbDataReader reader;

        reader = com.ExecuteReader();

        GridView1.DataMember = "emp";

        GridView1.DataSource = reader;

        GridView1.DataBind();

        reader.Close();

        con.Close();

    }

}