upload excel sheet files

protected void PopulateGrid(object sender, EventArgs e)

{

//First Create the instance of Stopwatch Class

Stopwatch sw = new Stopwatch();

// Start The StopWatch ...From 000

sw.Start();

// CHECK IF A FILE HAS BEEN SELECTED.

if ((FileUpload.HasFile))

{

if (!Convert.IsDBNull(FileUpload.PostedFile) &

FileUpload.PostedFile.ContentLength > 0)

{

// SAVE THE SELECTED FILE IN THE ROOT DIRECTORY.

FileUpload.SaveAs(Server.MapPath(".") + "\\" + FileUpload.FileName);

// SET A CONNECTION WITH THE EXCEL FILE.

OleDbConnection myExcelConn = new OleDbConnection

("Provider=Microsoft.ACE.OLEDB.12.0; " +

"Data Source=" + Server.MapPath(".") + "\\" + FileUpload.FileName +

";Extended Properties=Excel 12.0;");

try

{

myExcelConn.Open();

// GET DATA FROM EXCEL SHEET.

OleDbCommand objOleDB =

new OleDbCommand("SELECT *FROM [Sheet1$]", myExcelConn);

// READ THE DATA EXTRACTED FROM THE EXCEL FILE.

OleDbDataReader objBulkReader = null;

objBulkReader = objOleDB.ExecuteReader();

DataTable dt = new DataTable();

dt.Load(objBulkReader);

// FINALLY, BIND THE EXTRACTED DATA TO THE GRIDVIEW.

GridView1.DataSource = dt;

GridView1.DataBind();

sw.Stop();

//Writing Execution Time in label

string ExecutionTimeTaken = string.Format("Minutes :{0}\nSeconds :{1}\n Mili seconds :{2}", sw.Elapsed.Minutes, sw.Elapsed.Seconds, sw.Elapsed.TotalMilliseconds);

label1.Text = ExecutionTimeTaken;

lblConfirm.Text = "DATA IMPORTED TO THE GRID, SUCCESSFULLY.";

lblConfirm.Attributes.Add("style", "color:green");

}

catch (Exception ex)

{

// SHOW ERROR MESSAGE, IF ANY.

lblConfirm.Text = ex.Message;

lblConfirm.Attributes.Add("style", "color:red");

}

finally

{

// CLEAR.

myExcelConn.Close(); myExcelConn = null;

}

}

}

}

protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)

{

GridView1.PageIndex = e.NewPageIndex;

GridView1.DataBind();

// PopulateGrid();

}

}