城杆

   try
            {

                if (this.txt_send_area.Text == "")
                {
                    this.txt_send_area.Text = sign_order_head.Send_Post;

                    BG_AREA bgarea = new BG_AREA(sign_order_head.Send_Post, sign_order_head.Send_City);
                    this.txt_send_post.Text = bgarea.PostNo;
                }
                else if (this.txt_send_area.Text == this.txt_send_post.Text && this.txt_send_area.Text.Length == 3)
                {



                    try
                    {
                        //都是区号
                        int postno = Convert.ToInt32(sign_order_head.Send_Area);
                        BG_AREA bgarea = new BG_AREA(sign_order_head.Send_Area, sign_order_head.Send_City);
                        this.txt_send_area.Text = bgarea.AreaName;
                    }
                    catch
                    {
                        //文字
                        BG_AREA bgarea = new BG_AREA(sign_order_head.Send_Area, sign_order_head.Send_City);
                        this.txt_send_post.Text = bgarea.PostNo;

                    }

                }
                else
                {

                    this.txt_send_post.Text = Convert.ToInt32(txt_send_post.Text).ToString();
                }
              
                
            }
            catch
            {
                this.txt_send_post.Text = "000";
            }