C# 如何检查用户是否属于具有 MVC4 简单成员资格的几种不同角色中的任何一种？
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How can I check if a user is in any one of a few different roles with MVC4 Simple membership?
提问by
I understand that a good way to check if an user is in a role is:
我知道检查用户是否处于角色的一种好方法是：
if (User.IsInRole("Admin"))
{
}
However How can I check if my user is in one of the "Author", "Admin" or "Super" roles? Is there a way to do this without coding "User.IsInRole" for each of the roles?
但是，如何检查我的用户是否属于“作者”、“管理员”或“超级”角色之一？有没有办法在不为每个角色编码“User.IsInRole”的情况下做到这一点？
采纳答案by mattytommo
EDIT: Without coding each role, do it a LINQ extension method, like so:
编辑：不编码每个角色，做一个 LINQ 扩展方法，像这样：
private static bool IsInAnyRole(this IPrincipal user, List<string> roles)
{
var userRoles = Roles.GetRolesForUser(user.Identity.Name);
return userRoles.Any(u => roles.Contains(u));
}
For usage, do:
对于使用，请执行以下操作：
var roles = new List<string> { "Admin", "Author", "Super" };
if (user.IsInAnyRole(roles))
{
//do something
}
Or without the extension method:
或者没有扩展方法：
var roles = new List<string> { "Admin", "Author", "Super" };
var userRoles = Roles.GetRolesForUser(User.Identity.Name);
if (userRoles.Any(u => roles.Contains(u))
{
//do something
}
回答by Paul Turner
There's no built-in way to check if a user is in multiple roles, but it's pretty trivial to create a nice extension method to handle it for you:
没有内置的方法来检查用户是否具有多个角色，但是创建一个很好的扩展方法来为您处理它是非常简单的：
public static bool IsInAnyRole(this IPrincipal principal, params string[] roles)
{
return roles.Any(principal.IsInRole);
}
Usage then is:
用法是：
if (User.IsInAnyRole("Admin", "Author", "SuperUser"))
{
}
回答by Venkata Tata
You can also use
你也可以使用
if(Roles.GetRolesForUser(model.UserName).Contains("Admin")){
}
回答by Cyberdrew
I wanted to elaborate a little on mattytommo's answer, here is what I use:
我想详细说明 mattytommo 的答案，这是我使用的：
Extension Method:
扩展方法：
public static bool IsInAnyRole(this IPrincipal user, string[] roles)
{
//Check if authenticated first (optional)
if (!user.Identity.IsAuthenticated) return false;
var userRoles = Roles.GetRolesForUser(user.Identity.Name);
return userRoles.Any(roles.Contains);
}
Constants:
常数：
public static class Role
{
public const string Administrator = "Administrator";
public const string Moderator = "Moderator";
}
Usage:
用法：
if (User.IsInAnyRole(new [] {Role.Administrator,Role.Moderator}))
{
//Do stuff
}
回答by user007
I used the below code. In my case, I had a semi colon de-limited string as the parameter which is read from web.config. You may change the below code easily if you are passing a List.
我使用了下面的代码。就我而言，我有一个以分号分隔的字符串作为从 web.config 读取的参数。如果您正在传递一个列表，您可以轻松更改以下代码。
public class ActiveDirectoryGroup
{
public static bool IsInAnyRole(string adRoles)
{
return adRoles.Split(Convert.ToChar(";")).Any(role => !string.IsNullOrEmpty(role.Trim()) && HttpContext.Current.User.IsInRole(role.Trim()));
//If list is passed use below
//return listParameter.Any(role => !string.IsNullOrEmpty(role.Trim()) && HttpContext.Current.User.IsInRole(role.Trim()));
}
}
In web.config:
在 web.config 中：
<appSettings>
<add key="ADGroup" value="Domain\Admin;Domain\Supervisor;Domain\Manager;" />
</appSettings>
I used it like below in my page load:
我在页面加载中使用它如下：
if (ActiveDirectoryGroup.IsInAnyRole(ConfigurationManager.AppSettings["ADGroup"]))
{
//do something
}
回答by Francesco Ceresa
Please, use this simple way :
请使用这个简单的方法：
@using Microsoft.AspNet.Identity
@if (Request.IsAuthenticated)
{
if (User.IsInRole("Administrator") || User.IsInRole("Moderator"))
{
... Your code here
}
}
回答by César León
In my case i just have one role per user. So i did it like this:
就我而言，我每个用户只有一个角色。所以我是这样做的：
if (User.Roles.FirstOrDefault().RoleId == "7b433246-5881-4ace-bbaa-e5514191171c") {
//Do something
}
回答by Tuncay Ermi?
What about this?
那这个呢？
if (User.Roles.Count() != 0)
{
//User is not in any role
}else
{
//User is in at least one role
}
