C# 读取Excel表格中的数据

        string str = "Provider=Microsoft.Jet.OLEDB.4.0;Data source=c:\\test.xls;Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1;\" "; //注意此连接字符串的书写
        DataSet ds = new DataSet();
        OleDbConnection con;
            OleDbDataAdapter myadapter;
            con = new OleDbConnection(str);
                con.Open();
                myadapter = new OleDbDataAdapter("select * from [Sheet1$]", con);
                myadapter.Fill(ds, "ds");
                foreach (DataRow row in ds.Tables["ds"].Rows)
                {
                    string userInfo = row[0].ToString().Trim() + row[1].ToString().Trim() + row[2].ToString().Trim() + row[3].ToString().Trim() + row[4].ToString().Trim();
                    Response.Write(userInfo);
                }
          
                con.Close();