protected void btnBack_Click(object sender, EventArgs e)
    {
        Response.Redirect("~/Default.aspx");
    }
    protected void btnSave_Click(object sender, EventArgs e)
    {
        string sql = "insert into Houseinformation(HousingID) values('" + txtHousingID.Text + "')";
        SqlCommand cmd = new SqlCommand(sql, con);
        con.Open();
        if (cmd.ExecuteNonQuery() > 0)
        {
            Response.Write("<script>window.Close</script>");

            Response.Redirect("~/Default.aspx");
        }
        else
        {
            Response.Write("插入失败！！！");
        }
    }