Question

自定义成员资格用户对象创建时抛出错误。详细信息错误消息如下。

错误：

System.Configuration.ConfigurationErrorsException was caught
  Message=No parameterless constructor defined for this object. (D:\Projects\Sample\SampleMembership\web.config line 23)
  Source=System.Web
  BareMessage=No parameterless constructor defined for this object.
  Filename=D:\Projects\Sample\SampleMembership\web.config
  Line=23
  StackTrace:
       at System.Web.Configuration.ProvidersHelper.InstantiateProvider(ProviderSettings providerSettings, Type providerType)
       at System.Web.Configuration.ProvidersHelper.InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType)
       at System.Web.Security.Membership.InitializeSettings(Boolean initializeGeneralSettings, RuntimeConfig appConfig, MembershipSection settings)
       at System.Web.Security.Membership.Initialize()
       at System.Web.Security.MembershipAdapter.get_Providers()
       at System.Web.Security.MembershipUser..ctor(String providerName, String name, Object providerUserKey, String email, String passwordQuestion, String comment, Boolean isApproved, Boolean isLockedOut, DateTime creationDate, DateTime lastLoginDate, DateTime lastActivityDate, DateTime lastPasswordChangedDate, DateTime lastLockoutDate)
       at Asys.CatalogueViewer.Membership.CustomMembershipUser..ctor(String providername, String username, Object providerUserKey, String email, String passwordQuestion, String comment, Boolean isApproved, Boolean

我的自定义MembershipUser类代码如下所示。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using  System.Web.Security;
public class CustomMembershipUser : MembershipUser
{    
    private string _webSite;
    public string WebSite
    {
        get { return _webSite; }
        set { _webSite = value; }
    }
       public CustomMembershipUser()
           {
           }
    public CustomMembershipUser(string providername,
                              string username,
                              object providerUserKey,
                              string email,
                              string passwordQuestion,
                              string comment,
                              bool isApproved,
                              bool isLockedOut,
                              DateTime creationDate,
                              DateTime lastLoginDate,
                              DateTime lastActivityDate,
                              DateTime lastPasswordChangedDate,
                              DateTime lastLockedOutDate,
                              string webSite) :
        base(providername,
                                   username,
                                   providerUserKey,
                                   email,
                                   passwordQuestion,
                                   comment,
                                   isApproved,
                                   isLockedOut,
                                   creationDate,
                                   lastLoginDate,
                                   lastActivityDate,
                                   lastPasswordChangedDate,
                                   lastLockedOutDate)
    {
        this.WebSite =webSite;
    }
}

当我尝试使用上面的自定义用户类创建对象时出现错误（对象创建代码如下）

CustomMembershipUser membershipUser = new CustomMembershipUser(this.Name,
              username,
             Guid.Parse(userID.ToString()),
              email,
              passwordQuestion,
              comment,
              isApproved,
              isLockedOut,
              creationDate,
              lastLoginDate,
              lastActivityDate,
              lastPasswordChangedDate,
              lastLockedOutDate, "ss");

Web配置配置如下。

<configuration>
  <connectionStrings>
    <add name="ModelContainer" connectionString="metadata=res://*/Data.Model.csdl|res://*/Data.Model.ssdl|res://*/Data.Model.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=GET2CODE\GET2CODE;Initial Catalog=CatalogueViewer;User Id=sa;Password=hammer;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />
  </connectionStrings>
    <system.web>
        <machineKey validationKey= "23729FFE7E16B1DD03D3BC8B45280254DA09CE2ABF5C1AC2FFD5DA04AB2521DBD7E6A8EFBE49C63DA2DA55708545A4562C75E8495415CB7B0456720652A9F160"
decryptionKey= "D643C94989E6D3A76E265AA4A565108FA727DBC7AB87EDE85F578DC78A8E407C" validation="SHA1" decryption="AES"/>

        <compilation debug="true" targetFramework="4.0">
            <assemblies>
                <add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/></assemblies></compilation>
        <authentication mode="Forms" >
            <forms loginUrl="~/Account/Login.aspx" timeout="2880"/>
        </authentication>
        <membership defaultProvider="CustomMembershipProvider" userIsOnlineTimeWindow="15">
            <providers  >
                <clear/>                
                <add name="CustomMembershipProvider" type="ASys.Membership.CustomMembershipProvider"  enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" passwordFormat="Encrypted"  connectionStringName="ModelContainer"   />              
            </providers>            
        </membership>

        <profile>
            <providers>
                <clear/>
                <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>
            </providers>
        </profile>
        <roleManager enabled="false">
            <providers>
                <clear/>
                <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/"/>
                <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/"/>
            </providers>
        </roleManager>
    </system.web>
    <system.webServer>
        <modules runAllManagedModulesForAllRequests="true"/>
    </system.webServer>
</configuration>

请帮我解决这个问题

Answer 1

当您创建CustomMembersipUser的实例时，需要传递在web.config的membership身份部分中声明的提供者的名称。不建议对CustomMembershipProvider中的值进行硬编码，而是可以使用在调用CustomMembershipProvider.Initialize方法时接收此值的私有字段。

例如

public class CustomMembershipProvider: MembershipProvider
{
    private providerName = null;
    ...

    public override void Initialize(string name, NameValueCollection config)
    {
        providerName = name; // The friendly name of the provider
        ...
    }

    public override MembershipUser TestCreateUser(string username, bool userIsOnline)
    {
        CustomMembershipUser membershipUser = new CustomMembershipUser(providerName,
              username,
              Guid.Parse(userID.ToString()),
              email,
              passwordQuestion,
              comment,
              isApproved,
              isLockedOut,
              creationDate,
              lastLoginDate,
              lastActivityDate,
              lastPasswordChangedDate,
              lastLockedOutDate, "ss");
        ...
    }
}

您可以在MSDN上看到类似但更详细的示例。

ASP.NET自定义成员资格问题，获取自定义成员资格用户-No无参数构造函数，为此对象定义

1 个答案: