asp.net – ASP：NET确认密码字段

我在asp.net中创建一个简单的注册表单.
这是我的问题：
如果我的确认密码字段为空,它仍然提交表单.我正在使用compareToValidate我还需要使用requiredvalidator.我是asp.net的新手,但如果让密码为123并且确认密码为空,则comparevalidator不会产生错误.

<fieldset>
       <legend>Enter your data</legend>
       <table>
        <tr>
       <td align="right">User Name :</td>
       <td>&nbsp;</td>
         <td align="left">
        <asp:TextBox ID="tbUsername" runat="server"></asp:TextBox>
    <asp:RequiredFieldValidator ID="rfvUserName" runat="server" 
        ControlToValidate="tbUsername" 
        CssClass="ValidationError"
        ErrorMessage="&laquo; (Required)"
        ToolTip="User Name is a REQUIRED field"
        ></asp:RequiredFieldValidator>
        </td>
</tr>`enter code here`
<tr >
<td align="right">Password&nbsp;:&nbsp;</td>
<td>&nbsp;</td>
<td align="left"> 
    <asp:TextBox ID="tbPassword" runat="server" TextMode="Password"></asp:TextBox>
    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" 
     ErrorMessage="&laquo; (Required)" 
     ControlToValidate="tbPassword"
     CssClass="ValidationError"

    ToolTip="Password is a REQUIRED field"
    ></asp:RequiredFieldValidator>
</td>

</tr>
<tr >
<td align="right">Confirm Password&nbsp;:&nbsp;</td>
<td>&nbsp;</td>
<td align="left"> 
    <asp:TextBox ID="ConfirmPass" runat="server" TextMode="Password"></asp:TextBox>
     <asp:CompareValidator ID="CompareValidator1" runat="server" 
     ControlToValidate="ConfirmPass"
     CssClass="ValidationError"
     ControlToCompare="tbPassword"
     ErrorMessage="No Match" 
     ToolTip="Password must be the same" />

</td>

</tr>

<td align="left"> 
    <asp:TextBox ID="ConfirmPass" runat="server" TextMode="Password"></asp:TextBox>

    <asp:CompareValidator ID="CompareValidator1" runat="server" 
     ControlToValidate="ConfirmPass"
     CssClass="ValidationError"
     ControlToCompare="tbPassword"
     ErrorMessage="No Match" 
     ToolTip="Password must be the same" />

    <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
     ErrorMessage="&laquo; (Required)" 
     ControlToValidate="ConfirmPass"
     CssClass="ValidationError"
     ToolTip="Compare Password is a REQUIRED field">
    </asp:RequiredFieldValidator>
</td>