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<asp:Button ID="btnSubmit" runat="server" Height="31px" onclick="btnSubmit_Click" Text="Ìá½»ÑéÖ¤" Width="124px" />  
                  
<asp:Label ID="lblMessage" runat="server"></asp:Label>  
<cc1:SerialNumber ID="snCode" runat="server">
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<asp:Button ID="btnSubmit" runat="server" Height="31px" onclick="btnSubmit_Click" Text="Ìá½»ÑéÖ¤" Width="124px" />

<asp:Label ID="lblMessage" runat="server"></asp:Label>
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protected void Page_Load(object sender, EventArgs e)   
{   
    if (!IsPostBack)   
    {   
        snCode.Create();//Ê״μÓÔØÉú³ÉÐÂÑéÖ¤Âë   
    }   
}   
    
protected void btnSubmit_Click(object sender, EventArgs e)   
{   
    if (!CheckCode())   
    {   
        lblMessag


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