将 User.Identity.Name 解析为 DomainUsername 的内置助手

问题描述

是否有任何内置实用程序或帮助程序来解析 HttpContext.Current.User.Identity.Name，例如domainuser 分别获取域名(如果存在)和用户?

Is there any built-in utility or helper to parse HttpContext.Current.User.Identity.Name, e.g. domainuser to get separately domain name if exists and user?

或者有没有其他类可以这样做?

Or is there any other class to do so?

我知道调用 String.Split("") 很容易，但很有趣

I understand that it's very easy to call String.Split("") but just interesting

推荐答案

这个更好(更容易使用，没有机会NullReferenceExcpetion并且符合MS关于处理空字符串和空字符串的编码指南同样):

This is better (easier to use, no opportunity of NullReferenceExcpetion and conforms MS coding guidelines about treating empty and null string equally):

public static class Extensions
{
    public static string GetDomain(this IIdentity identity)
    {
        string s = identity.Name;
        int stop = s.IndexOf("\");
        return (stop > -1) ?  s.Substring(0, stop) : string.Empty;
    }

    public static string GetLogin(this IIdentity identity)
    {
        string s = identity.Name;
        int stop = s.IndexOf("\");
        return (stop > -1) ? s.Substring(stop + 1, s.Length - stop - 1) : string.Empty;
    }
}

用法:

IIdentity id = HttpContext.Current.User.Identity;
id.GetLogin();
id.GetDomain();

这需要 C# 3.0 编译器(或更新版本)并且不需要 3.0 .Net 编译后工作.

This requires C# 3.0 compiler (or newer) and doesn't require 3.0 .Net for working after compilation.

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