Please help me out How To Store Data From Excel to Database in 3-tier Archietecture pls

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ASP.NET

please help me how to bind Excel data into database in #-tier archietecture...

String strConnection = "Data Source=MySystem;Initial Catalog=MySamplesDB;Integrated Security=True";
        //file upload path
        string path = fileuploadExcel.PostedFile.FileName;
        //Create connection string to Excel work book
        string excelConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;Persist Security Info=False";
        ////Create Connection to Excel work book
        OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);
        ////Create OleDbCommand to fetch data from Excel
        OleDbCommand cmd = new OleDbCommand("Select [Id],[Name],[Designation],[Address] from [Sheet1$]", excelConnection);
        excelConnection.Open();
        OleDbDataReader dReader;
        dReader = cmd.ExecuteReader();
        SqlBulkCopy sqlBulk = new SqlBulkCopy(strConnection);
        //Give your Destination table name
        sqlBulk.DestinationTableName = "Excel_table";
        sqlBulk.WriteToServer(dReader);
        excelConnection.Close();

this is the code in Single tier..
But i dont know how to convert this code into 3-tier please help me...