C# DataAnnotations 正则表达式匹配不正确

Question

我正在尝试使用 razor 页面验证用户以密码形式输入的内容。我有以下模型

    public class UserPassword
    {
        public Guid? Id{ get; set; }
        public string Code { get; set; }
        [StringLength(32, MinimumLength = 8, ErrorMessage = "The password must at least be 8 characters")]
        [RegularExpression("[A-Z]", ErrorMessage = "The password Must contain atleast one uppercase character")]
        public string Password { get; set; }
        [Compare("Password")]
        public string ConfirmedPassword { get; set; }
    }

用生成的.cshtlm

@page "{id}/{code}"
@model AuthenticationService.Pages.UserPasswordModel

@{
    ViewData["Title"] = "UserPassword";
}

<hr />
<div class="row">
    <div class="col-md-4">
        <form method="post">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="UserPassword.Password" class="control-label"></label>
                <input asp-for="UserPassword.Password" class="form-control" />
                <span asp-validation-for="UserPassword.Password" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="UserPassword.ConfirmedPassword" class="control-label"></label>
                <input asp-for="UserPassword.ConfirmedPassword" class="form-control" />
                <span asp-validation-for="UserPassword.ConfirmedPassword" class="text-danger"></span>
            </div>
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

@section Scripts {
    @{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}

此外，OnGet() 和 OnPostAsync() 方法如下所示

 public IActionResult OnGet()
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }
            return Page();
        }

        [BindProperty]
        public UserPassword UserPassword { get; set; }

        public async Task<IActionResult> OnPostAsync()
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }
            UserPassword.Id = Guid.Parse(RouteData.Values["id"].ToString());
            UserPassword.Code = Base64Utility.UrlSafeDecode(RouteData.Values["code"].ToString());
            var user = await _userManager.FindByIdAsync(UserPassword.Id.ToString());
            var result = await _userManager.ConfirmEmailAsync(user, UserPassword.Code);
            if (result.Succeeded)
            {
                await _userManager.RemovePasswordAsync(user);
                await _userManager.AddPasswordAsync(user, UserPassword.ConfirmedPassword);
                return RedirectToPage("./Confirmation");
            }
            return RedirectToPage("./Error");
        }

我的问题是数据注释正则表达式。正则表达式仅匹配输入表单的第一个字符，当向输入表单添加其他字符时，将显示 ErrorMessage“必须包含大写字符”，即使有多个大写字符作为如下图所示。

Answer 1

对于工作模式，您可以尝试 "(?=.*[A-Z]).*"。

对于可理解的模式，您可以尝试 ".*[A-Z]+.*" 这意味着:

• .* 有任何字符
• [A-Z]+有一个或多个大写。