WCF已知類型錯誤

Question

叫我的服務，當我得到這個錯誤：

Server Error in '/' Application. 
-------------------------------------------------------------------------------- 

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: There was an error while trying to serialize parameter http://DSD.myCompany.net/DsdWebServices/2011/05/:config. The InnerException message was 'Type 'System.OrdinalComparer' with data contract name 'OrdinalComparer:http://schemas.datacontract.org/2004/07/System' is not expected. Add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.'. Please see InnerException for more details. 

Source Error: 


Line 130:   passwordAttemptWindow="10" 
Line 131:   passwordStrengthRegularExpression="" 
Line 132:   type="DsdWebsite.Providers.DsdMembershipProvider, DsdWebsite.Providers" /> 
Line 133:  </providers> 
Line 134: </membership> 


Source File: C:\Development\DSD Website\WebUI\web.config Line: 132 


-------------------------------------------------------------------------------- 
Version Information: Microsoft .NET Framework Version:2.0.50727.5444; ASP.NET Version:2.0.50727.5420 

的服務是成員資格提供數據服務。我創建了一個MembershipUser DTO來在整個服務中來回移動數據。它只使用標準類：string，int，DateTime。我使用guid而不是objectUserKey作爲對象。

該服務的界面看起來是這樣的：

[ServiceContract(Namespace = "http://DSD.myCompany.net/DsdWebServices/2011/05/")] 
[ServiceKnownType(typeof(MembershipUserDTO))] 
[ServiceKnownType(typeof(NameValueCollection))] 
[ServiceKnownType(typeof(Guid))] 
[ServiceKnownType(typeof(DateTime))] 
public interface IDsdMembershipProviderService 
{ 
    [OperationContract] 
    void Initialize(string name, NameValueCollection config); 

    [OperationContract] 
    MembershipUserDTO CreateUser(string username, 
     string salt, 
     string encodedPassword, 
    ... 

的DTO看起來像這樣

namespace DsdWebsite.Services.Providers 
{ 
    [Serializable] 
    [DataContract] 
    [KnownType(typeof(Guid))] 
    [KnownType(typeof(DateTime))] 
    public class MembershipUserDTO 
    { 
     public MembershipUserDTO(string providerName, string userName, Guid providerUserKey, string email, 
           string passwordQuestion, string comment, bool isApproved, bool isLockedOut, 
           DateTime creationDate, DateTime lastLoginDate, DateTime lastActivityDate, 
           DateTime lastPasswordChangedDate, DateTime lastLockoutDate, 
           string firstName, string lastName, string cellPhone, string officePhone, 
           string brokerId, bool isAdmin, bool mustChangePassword) 
     { 
      ProviderName= providerName; 
      UserName = userName; 
      ProviderUserKey= providerUserKey; 
      Email= email; 
      PasswordQuestion= passwordQuestion; 
      Comment= comment; 
      IsApproved=isApproved; 
      IsLockedOut= isLockedOut; 
      CreationDate= creationDate; 
      LastLoginDate= lastLoginDate; 
      LastActivityDate= lastActivityDate; 
      LastPasswordChangedDate = lastPasswordChangedDate; 
      LastLockoutDate=lastLockoutDate; 
... 

最後，我的web.config看起來是這樣的：

<membership 
defaultProvider="DsdMembershipProvider" 
userIsOnlineTimeWindow="15" 
hashAlgorithmType=""> <providers> 
    <clear/> 
    <add 
     name="DsdMembershipProvider" 
     connectionStringName="DsdMembershipConnectionString" 
     enablePasswordRetrieval="true" 
     enablePasswordReset="true" 
     requiresQuestionAndAnswer="true" 
     applicationName="/DsdWebsite/" 
     requiresUniqueEmail="true" 
     passwordFormat="Encrypted" 
     maxInvalidPasswordAttempts="5" 
     minRequiredPasswordLength="7" 
     minRequiredNonalphanumericCharacters="0" 
     passwordAttemptWindow="10" 
     passwordStrengthRegularExpression="" 
     type="DsdWebsite.Providers.DsdMembershipProvider, 
DsdWebsite.Providers" /> 
</providers> </membership> 

如何我可以確定導致錯誤的類型或對象嗎？ 感謝

Answer 1

使用以下ServiceKnownTypeAttribute構造指定包含靜態方法methodName，將返回服務已知類型的類的類型（declaringType）：

public ServiceKnownTypeAttribute(
    string methodName, 
    Type declaringType 
) 

裏面的上述靜態方法添加的所有服務而聞名類型已經（儘管我認爲如果沒有DateTime和Guid，你會做得很好），並且還要加上System.OrdinalComparer。

問題在於System.OrdinalComparer是內部類，因此您必須通過反射來獲取類型。

編輯：

System.OrdinalComparer是mscorlib組件的一部分。基本上你可以用以下方式獲得它的類型：

Type[] types = typeof(string).Assembly.GetTypes(); 

，然後你可以（使用LINQ，添加使用報表進行必要的）按名稱檢索想要的類型。

Type type = types.Where(x => x.FullName == "System.OrdinalComparer"); 

以上兩行可以合併爲一個，爲簡單起見使用兩行完成。

如果您需要更多的細節，請說。