如何更改ASP.NET Identity中的错误消息 [英] How to change error message in ASP.NET Identity

问题描述

我有一个问题. 我正在尝试更改Identity ASP .NET中的错误消息，但我不知道该怎么做. 我想要更改错误消息-已经登录". CreateAsync方法返回此错误消息. 请帮助我.

I have one question. I'm trying change error message in Identity ASP .NET and I don't know how do it. I want change error message - "Login is already taken". CreateAsync method return this error message. Please help me.

推荐答案

Microsoft.AspNet.Identity.UserManager<TUser>类具有一个名为UserValidator的公共属性，类型为IIdentityValidator<TUser>. UserManager的构造函数将该属性设置为Microsoft.AspNet.Identity.UserValidator<TUser>的实例.您在调用CreateAsync时看到的错误消息来自Microsoft.AspNet.Identity.dll中嵌入的资源，并从UserValidator内部添加到IdentityResult中.

The Microsoft.AspNet.Identity.UserManager<TUser> class has a public property called UserValidator of type IIdentityValidator<TUser>. The constructor for UserManager sets that property to an instance of Microsoft.AspNet.Identity.UserValidator<TUser>. The error messages you see when calling CreateAsync come from the resources embedded in the Microsoft.AspNet.Identity.dll and are added to the IdentityResult from inside UserValidator.

您可以提供自己的IIdentityValidator<TUser>实现，这只是一个带有签名:Task<IdentityResult> ValidateAsync(TUser item)的单一方法.您必须实施自己的验证，但可以控制发出的消息.像这样:

You could provide your own implementation of IIdentityValidator<TUser>, which is just a single method with signature: Task<IdentityResult> ValidateAsync(TUser item). You'd have to implement your own validations, but you'd have control over the messages that come out. Something like:

public class UserValidator : IIdentityValidator<ApplicationUser>
{
    public async Task<IdentityResult> ValidateAsync(ApplicationUser item)
    {
        if (string.IsNullOrWhiteSpace(item.UserName))
        {
            return IdentityResult.Failed("Really?!");
        }

        return IdentityResult.Success;
    }
}

默认的UserValidator类执行三个基本验证，如果您自己滚动，请牢记:

The default UserValidator class performs three basic validations to keep in mind if you roll your own:

1. 用户名不为null或空格
2. 用户名是字母数字
3. 用户名不是重复的

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