HttpContext.Current.User.Identity.Name如何知道存在哪些用户名? [英] How does HttpContext.Current.User.Identity.Name know which usernames exist?

问题描述

这不一定是问题，我只是好奇它是如何工作的.我有一种方法:

This is not necessarily an issue, I am just curious as to how it works. I have a method:

public static bool UserIsAuthenticated()
{
    bool isAuthed = false;
    try
    {
        if (HttpContext.Current.User.Identity.Name != null)
        {
            if (HttpContext.Current.User.Identity.Name.Length != 0)
            {
                FormsIdentity id = (FormsIdentity)HttpContext.Current.User.Identity;
                FormsAuthenticationTicket ticket = id.Ticket;
                isAuthed = true;
                string MyUserData = ticket.UserData;
            }
        }
    }
    catch { } // not authed
    return isAuthed;
}

如果用户不存在，HttpContext.Current.User.Identity.Name返回null，但是它如何知道存在或不存在哪些用户名?

The HttpContext.Current.User.Identity.Name returns null if the user does not exist, but how does it know which usernames exist or do not exist?

推荐答案

HttpContext.Current.User.Identity.Name返回null

The HttpContext.Current.User.Identity.Name returns null

这取决于您的web.config文件中的身份验证模式是设置为表单还是 Windows .

This depends on whether the authentication mode is set to Forms or Windows in your web.config file.

例如，如果我这样编写身份验证:

For example, if I write the authentication like this:

<authentication mode="Forms"/>

然后，因为身份验证模式="Forms"，我将为用户名获取null.但是，如果我将身份验证模式更改为Windows，如下所示:

Then because the authentication mode="Forms", I will get null for the username. But if I change the authentication mode to Windows like this:

<authentication mode="Windows"/>

我可以再次运行该应用程序并检查用户名，然后我将成功获取用户名.

I can run the application again and check for the username, and I will get the username successfully.

有关更多信息，请参见系统. Web.HttpContext.Current.User.Identity.Name与ASP.NET中的System.Environment.UserName .

For more information, see System.Web.HttpContext.Current.User.Identity.Name Vs System.Environment.UserName in ASP.NET.

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