正则表达式\ w不起作用 [英] Regular Expression \w is not working

问题描述

我正在工作一个asp.net核心应用程序.

I am working an an asp.net core app.

我已经进行验证了.

我试图禁止用户仅输入空格.所以我用这个:

I am trying to prohibit the user from entering only spaces. So I use this:

    [Display(Name = "Reason for Cancellation")]
    [Required]
    [RegularExpression(@"\w", ErrorMessage = CancellationValidationErrorMessage)]
    [StringLength(245)] // 245 characters to allow for History Type prefix to be added
    public string CancelJustificationComments { get; set; }

虽然错误弹出，指出我必须提供一个条目，但在其他任何输入上也都会出现错误.

And whilst the error pops up stating that i must supply an entry I also get the error on any other input as well.

怎么了?

推荐答案

正则表达式验证器要求整个文本与正则表达式匹配.因此，该\ w仅匹配单个字符条目.

The regex validator requires that the whole text matches the regex. So this \w only matches a single character entry.

解决方案:在其周围添加一些通配符:.* \ w.*

Solution: add some wildcards around it: .*\w.*

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