使用MVC2.0 webconfig自定义RoleProvider

Question

我有一个自定义MembershipProvider和一个自定义RoleProvider。我通过创建实现MembershipProvider类的SimpleMembershipProvider类创建了自定义MembershipProvider。在那之后，我改变了我的web.config并开始工作。

因此，我使用了相同的方法来创建自定义RoleProvider。没什么特别的，只是创建了一个实现RoleProvider类的SimpleRoleProvider类。但是，当我更改web.config文件并运行解决方案时，我得到了以下错误消息：

Web.Config

<membership defaultProvider="DashboardMembershipProvider">
<providers>
    <clear/>
    <add name="SimpleMembershipProvider" 
        type="Dashboard.Web.Controlling.Account.SimpleMembershipProvider" />
    </providers>
</membership>

<roleManager enabled="true" defaultProvider="DashboardRoleProvider">
    <providers>
        <clear/>
        <add name="DashboardRoleProvider" 
            type="Dashboard.Web.Controlling.Account.DashboardRoleProvider" />
    </providers>
</roleManager>


Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: No parameterless constructor defined for this object.

Source Error
Line 78:         <add name="SimpleRoleProvider" 
Line 79:            type="Dashboard.Web.Controlling.Account.SimpleRoleProvider" />

所以我在网上搜索了一下。并在type属性上进行了尝试，这会生成以下错误：

 Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Could not load file or assembly 'Dashboard.Web.Controlling.Account' or one of its dependencies. The system cannot find the file specified.

Source Error:
Line 78:         <add name="SimpleRoleProvider" 
Line 79:              type="Dashboard.Web.Controlling.Account.SimpleRoleProvider,Dashboard.Web.Controlling.Account" />

关于如何让这个CustomRoleProvider工作，有什么建议吗？任何帮助都是非常感谢的！

Answer 1

从你得到的第一个异常开始，DashboardRoleProvider需要有一个无参数的构造函数。否则，框架将无法实例化您的角色提供程序。

在第二个示例中，您可能希望改用完全限定的程序集名称。

迈克尔

Answer 2

<add name="SimpleRoleProvider"            type="Dashboard.Web.Controlling.Account.SimpleRoleProvider,Dashboard.Web.Controlling.Account" />

第一个逗号后面的类型部分是程序集名称，您确定程序集名称不只是Dashboard.Web吗？

右键单击项目并选择属性，这将找到您的程序集名称。