覆盖角色提供程序 - ASP.NET
编辑：通过重写 RoleProvider，我们希望仍然在新方法中使用相同的方法。例如 Roles.GetRolesForUser(int)。
string[] myRoles3 = ((PortalRoleProvider) (Roles.Provider)).GetRolesForUser(2);
上面的代码看起来有点多余？
我有一个类，它重写 RoleProvider 的一些成员并添加新方法。例如。
public string[] GetRolesForUser(int UserId)
{
IEnumerable<Role> RoleList = _Repo.GetRolesForUser(UserId);
string[] RetVal = new string[] {};
foreach (var curRole in RoleList)
{
RetVal[RetVal.GetUpperBound(0)] = curRole.RoleName;
}
return RetVal;
}
现在，当我在代码逻辑中时，我想编写 Roles.GetRolesForUser(2) 但当我键入此内容时，它似乎确实看到了我添加的额外方法。这是类声明和 webconfig。
namespace PortalMVC.Providers
{
public class PortalRoleProvider : RoleProvider
{
Web.config
<roleManager enabled="true" defaultProvider="PortalRoleProvider">
<providers>
<clear/>
<add name="PortalRoleProvider" type="PortalMVC.Providers.PortalRoleProvider"/>
</providers>
</roleManager>
有什么建议吗？
Edit: By Overriding the RoleProvider we were hoping to still use the same methods with our new methods. Such as Roles.GetRolesForUser(int).
string[] myRoles3 = ((PortalRoleProvider) (Roles.Provider)).GetRolesForUser(2);
That above code seems a bit excessive ?
I have a class which overrides some members of the RoleProvider and adds new methods. Eg.
public string[] GetRolesForUser(int UserId)
{
IEnumerable<Role> RoleList = _Repo.GetRolesForUser(UserId);
string[] RetVal = new string[] {};
foreach (var curRole in RoleList)
{
RetVal[RetVal.GetUpperBound(0)] = curRole.RoleName;
}
return RetVal;
}
Now when I am in the logic of my code I want to write Roles.GetRolesForUser(2) but when i type this, it does seem to see the extra method that I have added. Here is the class declaration and the webconfig.
namespace PortalMVC.Providers
{
public class PortalRoleProvider : RoleProvider
{
Web.config
<roleManager enabled="true" defaultProvider="PortalRoleProvider">
<providers>
<clear/>
<add name="PortalRoleProvider" type="PortalMVC.Providers.PortalRoleProvider"/>
</providers>
</roleManager>
Any suggestions why this is?
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评论（2）
您必须将 RoleProvider 转换为实际对象类型（即 PortalRoleProvider）才能看到额外的功能。这适用于任何时候您扩展了标准对象，但将其作为超类（母版页等）进行访问。
string[] myRoles3 = ((PortalRoleProvider) (Roles.Provider)).GetRolesForUser(2) 。正如您在帖子中指出的那样，上述内容是有效的 如果您需要在一段代码中大量使用它，您可以创建一个具有正确类型的指针，然后从那里访问方法：
PortableRoleProvider TempPointer=(PortableRoleProvider)Roles.Provider;
string[] myRoles3=TempPointer.GetRolesForUser(2);
You have to cast your RoleProvider as your actual object type (i.e. PortalRoleProvider) to see the extra functions. This applies to any time you've extended a standard object but are accessing it as it's super class (Master pages, etc.)
string[] myRoles3 = ((PortalRoleProvider) (Roles.Provider)).GetRolesForUser(2);The above, as you've pointed out in your post, works. If you need to use this a lot in a section of code, you can create a pointer with the proper type then access the methods from there:
PortableRoleProvider TempPointer=(PortableRoleProvider)Roles.Provider;
string[] myRoles3=TempPointer.GetRolesForUser(2);
在 web.config 中指定角色提供程序的类型时，您可能需要添加可以找到该类型的程序集的名称。像这样的东西：
In the web.config, where you specify the type for the role provider, you might need to add the name of the assembly where the type can be found. Something like this: