how to import data from excel to grid

Question

Hi
How to import data from Microsoft Excel 2010 to Gridview

am using web application.(visual studio 2010)

  String strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=D:\\Book1.xls;" + "Extended Properties=Excel 8.0;HDR=NO;";

                DataTable ds = new DataTable();

                string strSQL = "SELECT * FROM [Sheet1$]";

                OleDbDataAdapter da = new OleDbDataAdapter(strSQL, strConn);

                da.Fill(ds);

                grvPatient.DataSource = ds;

                grvPatient.DataBind();

m trying like this it provide error