adding excel to database

using System;

using System.Collections.Generic;

using System.Data;

using System.Data.OleDb;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using System.Xml;

using System.Data.SqlClient;

using System.Configuration;

namespace ImportToXLS.Controllers

{

public class HomeController : Controller

{

//

// GET: /Home/

public ActionResult Index()

{

return View();

}

[HttpPost]

public ActionResult Index(HttpPostedFileBase file)

{

DataSet ds = new DataSet();

if (Request.Files["file"].ContentLength > 0)

{

string fileExtension =

System.IO.Path.GetExtension(Request.Files["file"].FileName);

if (fileExtension == ".xls" || fileExtension == ".xlsx")

{

string fileLocation = Server.MapPath("~/Content/") + Request.Files["file"].FileName;

if (System.IO.File.Exists(fileLocation))

{

System.IO.File.Delete(fileLocation);

}

Request.Files["file"].SaveAs(fileLocation);

string excelConnectionString = string.Empty;

excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";

//connection String for xls file format.

if (fileExtension == ".xls")

{

excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";

}

//connection String for xlsx file format.

else if (fileExtension == ".xlsx")

{

excelConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";

}

//Create Connection to Excel work book and add oledb namespace

OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);

excelConnection.Open();

DataTable dt = new DataTable();

dt = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

if (dt == null)

{

return null;

}

String[] excelSheets = new String[dt.Rows.Count];

int t = 0;

//excel data saves in temp file here.

foreach (DataRow row in dt.Rows)

{

excelSheets[t] = row["TABLE_NAME"].ToString();

t++;

}

OleDbConnection excelConnection1 = new OleDbConnection(excelConnectionString);

string query = string.Format("Select * from [{0}]", excelSheets[0]);

using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, excelConnection1))

{

dataAdapter.Fill(ds);

}

}

if (fileExtension.ToString().ToLower().Equals(".xml"))

{

string fileLocation = Server.MapPath("~/Content/") + Request.Files["FileUpload"].FileName;

if (System.IO.File.Exists(fileLocation))

{

System.IO.File.Delete(fileLocation);

}

Request.Files["FileUpload"].SaveAs(fileLocation);

XmlTextReader xmlreader = new XmlTextReader(fileLocation);

// DataSet ds = new DataSet();

ds.ReadXml(xmlreader);

xmlreader.Close();

}

for (int i = 0; i < ds.Tables[0].Rows.Count; i++)

{

string conn = ConfigurationManager.ConnectionStrings["dbconnection"].ConnectionString;

SqlConnection con = new SqlConnection(conn);

string query = "Insert into data(name,addres,phone) Values('" + ds.Tables[0].Rows[i][0].ToString() + "','" + ds.Tables[0].Rows[i][1].ToString() + "','" + ds.Tables[0].Rows[i][2].ToString() + "')";

con.Open();

SqlCommand cmd = new SqlCommand(query, con);

cmd.ExecuteNonQuery();

con.Close();

return View();

}

}

}

return View();

}

}

}