Save view state data into DB Error

Dear all,
 when i select the values from dropdown list ,and add into view state, after insert data into DB, the data is not accurate.  kindly advise, thank you





<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="acmkweb.WM.WebForm2" %> <asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <asp:TextBox ID="TextBox1" runat="server"/> <asp:TextBox ID="TextBox2" runat="server"/> <asp:DropDownList ID = "Drop1" runat="serve ...