viewstate页面传值问题！！！

public partial class buy_buy_add : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            this.TextBox1.Text = "YLRK" + year + month + day + hour + minute + second;
            ViewState["1"] = this.TextBox2.Text.ToString();
            this.TextBox3.Text = this.ViewState["1"].ToString();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string serialNumber = this.ViewState["1"].ToString();
        SqlConnection strcon = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["strcon"]);
        strcon.Open();
        SqlTransaction st = strcon.BeginTransaction();
        SqlCommand sc = strcon.CreateCommand();
        sc.Transaction=st;

        try
        {

            sc.CommandText = "insert into tb_commodity_more(serialNumber)values('"+serialNumber+"')";
            sc.ExecuteNonQuery();

            st.Commit();
            Response.Write("<script language=javascript>alert('添加成功');location='buy_add.aspx'</script>");
        }
        catch(Exception error)
        {
          st.Rollback();
          Response.Write("<script language=javascript>alert('添加失败');location='buy_add.aspx'</script>");
        }
    }
}

关键程序如上所示，Textbox3可以显示viewstate的数值，但是数据库写不进去啊，事务回滚，显示添加失败，请高手帮忙看一下！！！！
--------------------编程问答-------------------- //ViewState["1"] = this.TextBox2.Text.ToString();  --------------------编程问答-------------------- this.TextBox1.Text = "YLRK" + year + month + day + hour + minute + second; 
            ViewState["1"] = this.TextBox1.Text.ToString(); 
            this.TextBox3.Text = this.ViewState["1"].ToString();

有点笔误，高手马上明白的 

补充：.NET技术 ,  ASP.NET