ASP.net 类和属性的问题

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using BLL;
using Model;
public partial class InsertOwnerInfo : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
    }
    protected void btnOk_Click(object sender, EventArgs e)
    {
        OwnerInfo owner = new OwnerInfo();
        owner.OwnerId = this.textid.Text.Trim();
        owner.OwnerName = this.textName.Text.Trim();
        owner.OwnerSex = this.ddlSex.SelectedValue.ToString();
        owner.Address = this.textAddress.Text.Trim();
        owner.Phone = this.textPhone.Text.Trim();
        owner.Mobile = this.textMobile.Text.Trim();
        owner.Company = this.textcompany.Text.Trim();
        owner.OfficePhone = this.textofficePhone.Text.Trim();
        owner.PaperName = this.textpaperName.Text.Trim();
        owner.PaperId = this.textpaperId.Text.Trim();
        owner.InkDate = this.textinkDate.Text.Trim();
        owner.GarrisonDate = this.TextgarrisonDate.Text.Trim();
        owner.GarrisonEndDate = this.TextgarrisonEndDate.Text.Trim();
        owne