在asp.net范围验证器不能按预期工作 [英] Range validator in asp.net doesn't work as expected

问题描述

我有这种房车在我的网页文本框：

I have this RV for a textbox in my page :

<asp:RangeValidator ID="titleRV" runat="server" ControlToValidate="titletxt" Font-Bold="True" Font-Size="Small" ForeColor="Red" MinimumValue="4" MaximumValue="100" Type="Integer" SetFocusOnError="True" Display="Dynamic" >Must be more than 3 !</asp:RangeValidator>

当我在文本框在运行时输入任何字符范围验证看来我是否输入少于3个字母或没有，如果我增加的字母数不会消失！任何帮助吗？

when I type any number of characters in my textbox at runtime the range validator appears whether I typed less than 3 letters or not ,and if I increased the number of letters it doesn't disappear! any help please ?

推荐答案

一个范围验证的目的是检查是否在范围内输入一个值 - 例如一个数字0到100之间，并像你这听起来我尝试检查是如何进入的信函呢？

A range validator is designed to check that you enter a value in a range - for example a number between 0 and 100. It sounds to me like you're trying to check how many letters were entered?

假如我正确地理解我的建议是使用正则表达式验证器。

Assuming I've understood correctly my suggestion would be to use a RegEx validator.

您可以使用一个前pression这样的：

You could use an expression like:

<asp:RegularExpressionValidator ID="valLength" runat="server"    
    ErrorMessage="Your text must be between 3 and 100 characters"       
    ValidationExpression="^[0-9a-zA-Z]{3,}$"
    ControlToValidate="txtTextBox" />

这显然取决于你允许

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