c# - 要调用此方法， “Membership.Provider”属性必须是 “ExtendedMembershipProvider”的实例

当前，每当我尝试使用主机提供者DiscountASP上内置于ASP.Net MVC4的默认成员资格服务注册用户或登录时，都会收到错误消息



这不是本地发生的。

这是我的InitializeSimpleMembershipAttribute.cs:

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public sealed class InitializeSimpleMembershipAttribute : ActionFilterAttribute
{
    private static SimpleMembershipInitializer _initializer;
    private static object _initializerLock = new object();
    private static bool _isInitialized;

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        // Ensure ASP.NET Simple Membership is initialized only once per app start
        LazyInitializer.EnsureInitialized(ref _initializer, ref _isInitialized, ref _initializerLock);
    }

    private abstract class SimpleMembershipInitializer
    {
        protected SimpleMembershipInitializer()
        {
            Database.SetInitializer<UsersContext>(null);

            try
            {
                using (var context = new UsersContext())
                {
                    if (!context.Database.Exists())
                    {
                        // Create the SimpleMembership database without Entity Framework migration schema
                        ((IObjectContextAdapter)context).ObjectContext.CreateDatabase();
                    }
                }

                WebSecurity.InitializeDatabaseConnection("DefaultConnection", "UserProfile", "UserId", "UserName", autoCreateTables: true);
            }
            catch (Exception ex)
            {
                throw new InvalidOperationException("The ASP.NET Simple Membership database could not be initialized. For more information, please see http://go.microsoft.com/fwlink/?LinkId=256588", ex);
            }
        }
    }
}

这是该错误的完整屏幕截图:



有谁知道我该如何解决这个问题或知道一篇针对它的文章？

最佳答案

尝试在web.config节点内的<system.web>中设置以下内容:

    <roleManager enabled="true" defaultProvider="SimpleRoleProvider">
        <providers>
            <clear />
            <add name="SimpleRoleProvider" type="WebMatrix.WebData.SimpleRoleProvider, WebMatrix.WebData" />
        </providers>
    </roleManager>
    <membership defaultProvider="SimpleMembershipProvider">
        <providers>
            <clear />
            <add name="SimpleMembershipProvider" type="WebMatrix.WebData.SimpleMembershipProvider, WebMatrix.WebData" />
        </providers>
    </membership>
    <sessionState mode="InProc" customProvider="DefaultSessionProvider">
        <providers>
            <add name="DefaultSessionProvider" type="System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" connectionStringName="DefaultConnection" />
        </providers>
    </sessionState>

听起来像SimpleMembership在您使用它时无法识别。

另外，值得一提的是，可以通过NuGet安装 WebMatrix.webData 库:

PM> Install-Package Microsoft.AspNet.WebPages.WebData

关于c# - 要调用此方法， “Membership.Provider”属性必须是 “ExtendedMembershipProvider”的实例，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15753864/