什么是空间的正则表达式 [英] What is regex for space

问题描述

在下面的代码中，正则表达式在从DDL中选择值时抛出错误。

验证表达式中存在一些错误。如何对此DDL中的数据使用正确的验证表达式。在DDL中有小字符， - ，括号和空格。

In the following code, the regular expression throws error on selection of a value from DDL.
There is some wrong in validation expression. How to use the correct validation expression for the data in this DDL. In DDL there is small characters, an -, brackets and space.

<asp:DropDownList ID="DropDownList7" runat="server"

        style="z-index: 1;top: 246px; left: 225px; position: absolute; height: 18px; width:148px"

               AutoPostBack="True"

             onselectedindexchanged="DropDownList7_SelectedIndexChanged">
         <asp:ListItem>SELECT</asp:ListItem>
         <asp:ListItem>(7-14 days)</asp:ListItem>
         <asp:ListItem>(4-8 days)</asp:ListItem>
    </asp:DropDownList>
    <asp:RegularExpressionValidator ID="RegularExpressionValidator5" runat="server"  Display='None'

            ControlToValidate="DropDownList7" ErrorMessage="Select Delivery Days"

            ValidationExpression="[0-9 a-z \s \d-_ ][(][)]{1,50}" Font-Size="X-Small"></asp:RegularExpressionValidator>

推荐答案

空间的正则表达式是 \s 。

例如用于匹配字母数字和空格的正则表达式将是 Regex.Replace（q，@[^ a-zA-Z0-9 \ s]，string.Empty）;

The regex for space is \s.
For e.g. the regex for matching alphanumeric and spaces would be Regex.Replace(q, @"[^a-zA-Z0-9\s]", string.Empty);

^\s*(?=[a-zA-Z0-9'/\\&.-])([a-zA-Z0-9'/\\&.\s-]{3,})(?<=\S)\s*

^ #Start of string
\ s *＃可选领先的空白，不要' t捕获。
（？= #Assert that ...
[a-zA-Z0-9 ' / \\& .-]＃允许下一个字符，非空格
）
（#Match 和捕获...
[a-zA-Z0 -9 ' / \\&。\ s - ] {3，}＃
）
（？< = \ S）＃断言前一个字符 不空格
\s *＃可选尾随空格，不要' t捕获。

^ # Start of string \s* # Optional leading whitespace, don't capture that. (?= # Assert that... [a-zA-Z0-9'/\\&.-] # the next character is allowed and non-space ) ( # Match and capture... [a-zA-Z0-9'/\\&.\s-]{3,} # ) (?<=\S) # Assert that the previous character is not a space \s* # Optional trailing whitespace, don't capture that.

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