大家在修改资料的时候用的 formview还是自己划

Question

如题,为什么我不能更新呢
在修改的from里面
 protected void Page_Load(object sender, EventArgs e)
    {
        string connectionigstring = ConfigurationManager.ConnectionStrings["sample2con"].ConnectionString;
        SqlConnection con = new SqlConnection(connectionigstring);
        SqlCommand cmdFind = new SqlCommand("select * from Members where UserID='a'", con);
        con.Open();
        SqlDataReader sdr = cmdFind.ExecuteReader(CommandBehavior.CloseConnection);
        while (sdr.Read())
        {
            this.lblID.Text = sdr["UserID"].ToString();
            this.tbUserName.Text = sdr["UserName"].ToString();
            this.ddlPower.Text = sdr["UserPower"].ToString();
            this.rbUserSex.Text = sdr["UserSex"].ToString();
            this.tbYear.Text = (Convert.ToDateTime(sdr["UserBirthDay"].ToString())).Year.ToString() ;
            this.ddlMonth.Text = (Convert.ToDateTime(sdr["UserBirthDay"].ToString())).Month.ToString();
            this.ddlDay.Text = (Convert.ToDateTime(sdr["UserBirthDay"].ToString())).Day.ToString();
            this.tbUserEmail.Text = sdr["UserEmail"].ToString();
            this.tbUserAddress.Text = sdr["UserAddress"].ToString();
        }
        sdr.Close();
    }
    protected void btnModify_Click(object sender, EventArgs e)
    {
        string UserName = this.tbUserName.Text;
        string UserSex = this.rbUserSex.Text;
        string UserPower = this.ddlPower.Text;
        string UserBirthDay;
        string UserEmail = this.tbUserEmail.Text;
        string UserAddress = this.tbUserAddress.Text;//这里我输出UserName...值为原来的值,不是新改的值.......        UserBirthDay = tbYear.Text + "-" + ddlMonth.Text + "-" + ddlDay.Text;
        string connectionigstring = ConfigurationManager.ConnectionStrings["sample2con"].ConnectionString;
        SqlConnection con = new SqlConnection(connectionigstring);
        SqlCommand cmd = new SqlCommand("update Members set UserName='" + UserName + "',UserSex='" + UserSex + "',UserEmail='" + UserEmail + "',UserBirthDay='" + UserBirthDay + "',UserAddress='" + UserAddress + "',UserPower='" + UserPower + "',UpdateTime='" + DateTime.Now.ToString() + "' where UserID='"+Session["UserID"].ToString()+"'", con);
        con.Open();
        cmd.ExecuteNonQuery();
        con.Close();
        Response.Write("<script>location.reload('MemberManage.aspx');</script>");
        //Response.Redirect("MemberManage.aspx");
    }

Answer 1

protected void Page_Load(object sender, EventArgs e)
{
if(!this.IsPostBack)
{
xxx
xxx
xxx}
}