asp.net mvc的属性属性中的正则表达式

Question

我想阻止用户名中的空格和特殊字符，但我不知道如何在一个数据属性中执行此操作，而asp.net mvc只允许每个属性使用1个正则表达式属性。

    [Required()]
    [StringLength(10, MinimumLength = 6, ErrorMessage = "Min 6 and max 10 characters")]
    [Display(Name = "User Name")]
    [RegularExpression(@"(\S)+", ErrorMessage = "White space is not allowed")]
    [RegularExpression(@"^[\%\/\\\&\?\,\'\;\:\!\-]+$", ErrorMessage = "No special characters")]
    [Remote("IsUsernameDuplicate", "Account", HttpMethod = "Get", ErrorMessage = "The username is already in use")]
    public string UserName { get; set; }

编辑1 我已将属性更改为

    [Required()]
    [MinLength(5, ErrorMessage = "Minimum length is 5")]
    [MaxLength(12, ErrorMessage = "Maximum length is 12")]
    [Display(Name = "User Name")]
    [RegularExpression(@"^[A-Za-z0-9_]$", ErrorMessage = "Hey, no funny symbol stuff")]
    [Remote("IsUsernameDuplicate", "Account", HttpMethod = "Get", ErrorMessage = "The username is already in use")]
    public string UserName { get; set; }

但是我在输入chuck并按Tab键时出现错误

编辑2

用^ [A-Za-z0-9 _] + $

的reg ex解决了它

Answer 1

使用A-Za-z0-9的用户名的正则表达式，只允许_（与大多数用户名一样）。

正则表达式： ^[A-Za-z0-9_]{5,12}$

由于您的最小和最大长度已经过检查，因此您可以使用^[A-Za-z0-9_]+$。

Regex101 Demo