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Read and Write XML Data from a Dataset in ASP.Net C#

Here in this blog we will see how to first write data from data set into a XML file and then how to read that XML file data into a Dataset.

To elaborate this we will use two grids on the page.

Step1:

Create a web page and put two Button

  1. Button to write XML ( named btnImport)

  2. Button to read XML ( named btnExport)

and also two grids

  1. To show written data  (named grdImport)

  2. To show Read data  ( named grdExport)

Here is the HTML Code (ReadWriteXML.aspx page) for the program

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

 

<!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">

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        <table>

            <tr>

                <td>

                    <asp:Button ID="btnImport" runat="server" Text="Write XML" OnClick="btnImport_Click" />

                </td>

            </tr>

            <tr>

                <td>

                </td>

            </tr>

            <tr>

                <td>

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

                    </asp:GridView>

                </td>

            </tr>

            <tr>

                <td>

                </td>

            </tr>

            <tr>

                <td>

                    <asp:Button ID="btnExport" runat="server" Text="Read XML" OnClick="btnExport_Click" />

                </td>

            </tr>

            <tr>

                <td>

                </td>

            </tr>

            <tr>

                <td>

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

                    </asp:GridView>

                </td>

            </tr>

        </table>

    </div>

    </form>

</body>

</html>

 

Code for ReadWriteXML.aspx.cs

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.Data.SqlClient;

using Database.DAL;

 

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

{

    Common objCommon = new Common();

 

    DataSet DS;

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void btnImport_Click(object sender, EventArgs e)

    {

        string FileName = "TEST_XML.xml";

        string FilePath = Server.MapPath("~/XML_Files/");

        using (SqlCommand cmd = new SqlCommand())

        {

            cmd.CommandText = "READ_XML_EMP";

            DS = DBHelper.SqlExecuteAdapter(cmd);

        }

 

        objCommon.Write_XML(DS, FileName, FilePath);

        grdImport.DataSource = DS;

        grdImport.DataBind();

    }

    protected void btnExport_Click(object sender, EventArgs e)

    {

        string FileName = "TEST_XML.xml";

        string FilePath = Server.MapPath("~/XML_Files/");

        DS = objCommon.Read_XML(FileName, FilePath);

        grdExport.DataSource = DS;

        grdExport.DataBind();

 

    }

}

 

DBHelper Class

using System;

using System.Data.SqlClient;

using System.Data;

using System.Security.Cryptography;

using System.IO;

using System.Web;

using System.Web.UI;

 

namespace Database.DAL

{

    /// <summary>

    /// Summary description for SqlHelper

    /// </summary>

    public class DBHelper

    {

        private DBHelper()

        {

            //

            // TODO: Add constructor logic here

            //

        }

        #region Connection String

 

        //Pick connection string from web.config   

        /*

               which could be:

 

               <connectionStrings>

               <add name="Connection" connectionString="Data Source=TESTSQL;Initial Catalog=TESTDB;uid=sa; pwd=TEST123;Connect Timeout=400;pooling='true'; MaxPool Size=100;" providerName="System.Data.SqlClient;"/>

               </connectionStrings>

        */

 

        private static string conn = System.Configuration.ConfigurationManager.ConnectionStrings["Connection"].ToString();

        #endregion

        #region Execute Adapter

        public static DataSet SqlExecuteAdapter(SqlCommand cmd)

        {

            DataSet ds = new DataSet();

            cmd.CommandType = CommandType.StoredProcedure;

            using (SqlConnection con = new SqlConnection(conn))

            {

                cmd.Connection = con;

                con.Open();

                SqlDataAdapter adapt = new SqlDataAdapter(cmd);

                adapt.Fill(ds);

                con.Close();

            }

            return ds;

        }

        #endregion

    }

}  

Common class

 

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

using Database.DAL;

using System.Xml;

using System.Xml.Serialization;

using System.IO;

 

namespace Database.DAL

{

    public class Common

    {

        public Common()

        {

            //

            // TODO: Add constructor logic here

            //

        }

 

        #region READ WRITE XML

 

 

        public void Write_XML(DataSet DS, string FileName, string FilePath)

        {

            StreamWriter XMLFile = new StreamWriter(FilePath + FileName, false);

            DS.WriteXml(XMLFile);

            XMLFile.Close();

        }

 

        public DataSet Read_XML(string FileName, string FilePath)

        {

            DataSet DS = new DataSet();

            DS.ReadXml(FilePath + FileName);

            return DS;

        }

        #endregion

    }

}

 

DB Structure

TEST_XML table

Image1.jpg

INSERT VALUES IN TABLE LIKE

Image2.jpg

READ_XML_EMP PROCEDUER

USE [TESTDB]

GO
/****** Object:  StoredProcedure [dbo].[READ_XML_EMP]    Script Date: 07/11/2013 17:11:26 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROC [dbo].[READ_XML_EMP]
AS
BEGIN
SELECT * FROM TEST_XML
END
GO

FIRST CLICK ON WRITE XML Button to Write Data INTO XML File

Output will be:

Image3.jpg

Click on Export button to read data from XML file

Output Will be:

Image4.jpg