本文介绍了在这个代码块中有多少个字段被验证？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
<form id="form1" runat="server">
<h1>401K Future Value Calculator</h1>
<label>Monthly investment:</label>
<asp:DropDownList ID="ddlMonthlyInvestment" runat="server" CssClass="entry"><br />
<label>Annual interest rate:</label>
<asp:TextBox ID="txtInterestRate" runat="server" CssClass="entry">6.0
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
CssClass="validator" ErrorMessage="Interest rate is required."
ControlToValidate="txtInterestRate" Display="Dynamic" Enabled="False">
<asp:RangeValidator ID="RangeValidator1" runat="server" CssClass="validator"
ControlToValidate="txtInterestRate" Display="Dynamic"
ErrorMessage="Interest rate must range from 1 to 20." MaximumValue="20"
MinimumValue="1" Type="Double" Enabled="False"><br />
<label>Number of years:</label>
<asp:TextBox ID="txtYears" runat="server" CssClass="entry">10
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"
CssClass="validator" ControlToValidate="txtYears" Display="Dynamic"
ErrorMessage="Number of years is required.">
<asp:RangeValidator ID="RangeValidator2" runat="server" CssClass="validator"
ControlToValidate="txtYears" Display="Dynamic"
ErrorMessage="Years must range from 1 to 45." MaximumValue="45"
MinimumValue="1" Type="Integer" Enabled="False"><br />
<label>Future value:</label>
<asp:Label ID="lblFutureValue" runat="server" Text=""><br />
<asp:Button ID="btnCalculate" runat="server" Text="Calculate" CssClass="button" />
<asp:Button ID="btnClear" runat="server" Text="Clear" CssClass="button" CausesValidation="False" />
</form>推荐答案
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