Read excel’s multiple sheet in asp.net with C#

I have create a program which need a concept for read multiple sheet at a time. but this is complex.  I have try to solved this problem. I have implement this code. This function is useful for you.

    private DataTable ReadExcelToTable(string path)

    {

        //Connection String (Excel)

        string connstring_Excel = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1';";

        using (OleDbConnection conn = new OleDbConnection(connstring_Excel))

        {

            conn.Open();

            //Get All Sheets Name

            DataTable sheetsName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });

            //Get the First Sheet Name

            string firstSheetName = sheetsName.Rows[0][2].ToString();

            //Query String

            string sql = string.Format("SELECT * FROM [{0}]", firstSheetName);

            OleDbDataAdapter ada = new OleDbDataAdapter(sql, connstring_Excel);

            DataSet set = new DataSet();

            ada.Fill(set);

            conn.Close();

            DataTable tempdt = new DataTable();

            tempdt = set.Tables[0];

            return tempdt;

        }

    }