string strSheetName = "house";
//源的定义
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = " + Server.MapPath(filename) + ";Extended Properties ='Excel 8.0;HDR=NO;IMEX=1'";
//Sql语句
string strExcel = "select * from [" + strSheetName + "$]";
//定义存放的数据表
DataSet ds = new DataSet();
//连接数据源
OleDbConnection conn = new OleDbConnection(strConn);
//适配到数据源
OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, conn);
adapter.Fill(ds, "res");