使用相同的datacontext多個查詢拋出SqlException

Question

我已經搜索控制與我試圖實現搜索作爲用戶類型的東西。我使用Linq to SQL來針對數據庫發起查詢。雖然它通常工作正常，但當用戶輸入查詢的速度非常快時，會引發一些隨機的SqlException。這些是我最近偶然發現的兩條不同錯誤信息：

當前命令發生嚴重錯誤。如果有的話，結果應該被丟棄。

無效嘗試呼叫讀取器關閉時讀取。

編輯：包括代碼

DataContextFactory類：

public DataContextFactory(IConnectionStringFactory connectionStringFactory) 
{ 
    this.dataContext = new RegionDataContext(connectionStringFactory.ConnectionString); 
} 

public DataContext Context 
{ 
    get { return this.dataContext; } 
} 

public void SaveAll() 
{ 
    this.dataContext.SubmitChanges(); 
} 

註冊IDataContextFactory使用Unity

// Get connection string from Application.Current settings 
ConnectionInfo connectionInfo = Application.Current.Properties["ConnectionInfo"] as ConnectionInfo; 
// Register ConnectionStringFactory with Unity container as a Singleton 
this.container.RegisterType<IConnectionStringFactory, ConnectionStringFactory>(new ContainerControlledLifetimeManager(), 
    new InjectionConstructor(connectionInfo.ConnectionString)); 
// Register DataContextFactory with Unity container 
this.container.RegisterType<IDataContextFactory, DataContextFactory>(); 

連接字符串：

Data Source=.\SQLEXPRESS2008;User Instance=true;Integrated Security=true;AttachDbFilename=C:\client.mdf;MultipleActiveResultSets=true; 

從倉庫類使用的DataContext：

// IDataContextFactory dependency is injected by Unity 
public CompanyRepository(IDataContextFactory dataContextFactory) 
{ 
    this.dataContextFactory = dataContextFactory; 
} 

// return List<T> of companies 
var results = this.dataContextFactory.Context.GetTable<CompanyEntity>() 
     .Join(this.dataContextFactory.Context.GetTable<RegionEntity>(), 
      c => c.regioncode, 
      r => r.regioncode, 
      (c, r) => new { c = c, r = r }) 
     .Where(t => t.c.summary_region != null) 
     .Select(t => new { Id = t.c.compcode, Company = t.c.compname, Region = t.r.regionname }).ToList(); 

什麼是身邊的工作？

Answer 1

這不是在你的連接字符串中需要MARS的東西嗎？

http://msdn.microsoft.com/en-us/library/h32h3abf(VS.80).aspx