Question

我有一个基于EF4模型的测试wcf webservice（REST）并在IIS7.5上发布。其中一个基本查询是

 public CfgUser GetUser(string fspId, string userName)
     {
     return _context.Users.FirstOrDefault(a => a.FspID == fspId && a.UserName == userName && a.WadtDeleted == false);
     }

然后我在ie9中使用以下网址进行测试：

https://10.201.2.70/webservices/service.svc/rest/GetUser(EDS,kern)

正确返回XML数据。 SQL事件探查器显示

exec sp_executesql N'SELECT TOP (2) 
[Extent1].[UserId] AS [UserId], 
[Extent1].[FSP] AS [FSP], 
[Extent1].[UserGroupId] AS [UserGroupId], 
[Extent1].[ContactID] AS [ContactID], 
[Extent1].[UserName] AS [UserName], 
[Extent1].[UserPassword] AS [UserPassword], 
[Extent1].[FirstName] AS [FirstName], 
[Extent1].[MidName] AS [MidName], 
[Extent1].[LastName] AS [LastName], 
[Extent1].[CommonName] AS [CommonName], 
[Extent1].[enumUserType] AS [enumUserType], 
[Extent1].[enumActive] AS [enumActive], 
[Extent1].[CreatedBy] AS [CreatedBy], 
[Extent1].[wadtDeleted] AS [wadtDeleted], 
[Extent1].[wadtModifiedBy] AS [wadtModifiedBy], 
[Extent1].[wadtModifiedOn] AS [wadtModifiedOn], 
[Extent1].[wadtModifiedOnDTOffset] AS [wadtModifiedOnDTOffset], 
[Extent1].[wadtRowID] AS [wadtRowID], 
[Extent1].[CreatedOn] AS [CreatedOn], 
[Extent1].[CreatedOnDTOffset] AS [CreatedOnDTOffset], 
[Extent1].[Email] AS [Email], 
[Extent1].[isDeviceUser] AS [isDeviceUser], 
[Extent1].[rowguid] AS [rowguid], 
[Extent1].[PasswordHash] AS [PasswordHash], 
[Extent1].[PasswordModifiedOn] AS [PasswordModifiedOn]
FROM [dbo].[cfgUsers] AS [Extent1]
WHERE (''EDS'' = [Extent1].[FSP]) AND ([Extent1].[UserName] = @p__linq__0) AND (0 = 
[Extent1].[wadtDeleted])',N'@p__linq__0 varchar(8000)',@p__linq__0='kern'

如果我再用url立即拨打电话：

https://10.201.2.70/webservices/service.svc/rest/GetUser(recserv,recserv-admin)

我收到请求错误。看起来EF linq查询保留了传入原始fspId参数的值，即'EDS'。 SQL事件探查器显示

exec sp_executesql N'SELECT TOP (2) 
[Extent1].[UserId] AS [UserId], 
[Extent1].[FSP] AS [FSP], 
[Extent1].[UserGroupId] AS [UserGroupId], 
[Extent1].[ContactID] AS [ContactID], 
[Extent1].[UserName] AS [UserName], 
[Extent1].[UserPassword] AS [UserPassword], 
[Extent1].[FirstName] AS [FirstName], 
[Extent1].[MidName] AS [MidName], 
[Extent1].[LastName] AS [LastName], 
[Extent1].[CommonName] AS [CommonName], 
[Extent1].[enumUserType] AS [enumUserType], 
[Extent1].[enumActive] AS [enumActive], 
[Extent1].[CreatedBy] AS [CreatedBy], 
[Extent1].[wadtDeleted] AS [wadtDeleted], 
[Extent1].[wadtModifiedBy] AS [wadtModifiedBy], 
[Extent1].[wadtModifiedOn] AS [wadtModifiedOn], 
[Extent1].[wadtModifiedOnDTOffset] AS [wadtModifiedOnDTOffset], 
[Extent1].[wadtRowID] AS [wadtRowID], 
[Extent1].[CreatedOn] AS [CreatedOn], 
[Extent1].[CreatedOnDTOffset] AS [CreatedOnDTOffset], 
[Extent1].[Email] AS [Email], 
[Extent1].[isDeviceUser] AS [isDeviceUser], 
[Extent1].[rowguid] AS [rowguid], 
[Extent1].[PasswordHash] AS [PasswordHash], 
[Extent1].[PasswordModifiedOn] AS [PasswordModifiedOn]
FROM [dbo].[cfgUsers] AS [Extent1]
WHERE (''EDS'' = [Extent1].[FSP]) AND ([Extent1].[UserName] = @p__linq__0) AND (0 = 
[Extent1].[wadtDeleted])',N'@p__linq__0 varchar(8000)',@p__linq__0='recserv-admin'

如果我重新启动IIS服务，那么第二个请求将会起作用，因此显然与某个地方的IIS存在关系？ FSP与用户之间存在一对多关联。

任何指定的帮助/指针

Answer 1

 public CfgUser GetUser(string fspId, string userName)
     {
     return _context.Users.FirstOrDefault(a => a.FspID == fspId && a.UserName == userName && a.WadtDeleted == false);
     }

如果这是您应用中的真实代码示例，那么您不应该有一个字段，因为我看到将上下文视为已创建的每个服务实例中的已创建实例。

您应该更改上下文，以便在返回所需数据后使用using语句创建实例。这应该可以解决您的错误。

public CfgUser GetUser(string fspId, string userName)
     {
        using (MyEntities _context = new MyEntities())
        {
     return _context.Users.FirstOrDefault(a => a.FspID == fspId && a.UserName == userName && a.WadtDeleted == false);
        }
     }

wcf返回无效数据

1 个答案: