ASP.NET应用程序 - 调试步骤

我开发的应用程序每周完全崩溃约2次。当它崩溃时，它会取消整个应用程序，直到应用程序池被回收。我无法在开发环境中重现错误。ASP.NET应用程序 - 调试步骤

下面我粘贴了导致应用程序事件查看器崩溃和错误消息的代码。 崩溃的应用程序开始于~~~~。该消息指出我有一个开放的DataReader，但我检查了我的代码，并且始终关闭数据读取器和连接。

我不知道我应该采取什么措施来解决这个错误。任何帮助将不胜感激。谢谢！

public bool open() { 
     //-- check if connection is closed 
     if (this.dbconn.State == System.Data.ConnectionState.Closed) { 
      try { 
       this.dbconn.Open(); 
      } 
      catch (Exception ex) { 
       this.errorCode = (int)DatabaseErrorType.DBOpenFailed; 
       this.errorMessage = System.Web.HttpUtility.HtmlEncode(ex.Message); 
       throw ex; 
      } 
     } 
     return true; 
    } 

/// <summary> closes connection object</summary> 
    public bool close() { 
     if (!(this.dbconn == null)) { 
      if (!(this.dbconn.State == System.Data.ConnectionState.Closed)) { 
       try { 
        this.dbconn.Close(); 
       } 
       catch (Exception ex) { 
        this.errorCode = (int)DatabaseErrorType.DBCloseFailed; 
        this.errorMessage = System.Web.HttpUtility.HtmlEncode(ex.Message); 
        return false; 
       } 

      } 
     } 
     return true; 
    } 
     // GET MULTI Accounts 
    public List<DTO.DTOAccount> GetAccounts(DTO.DTOAccount objAcc) { 
     //-- reset error variables 
     resetError(); 

     // make sure the connection is open 
     if (this.open()) { 

      SqlDataReader sqlReader = null; 

      try { 

       SqlCommand sqlProcedure = new SqlCommand("[dbo].[sp_Select_ONECARD_ACCOUNTS]", this.dbconn); 
       sqlProcedure.CommandType = System.Data.CommandType.StoredProcedure; 
       sqlProcedure.Parameters.Add(new SqlParameter("@ACCOUNT"    , objAcc.AccountId)); 
       sqlProcedure.Parameters.Add(new SqlParameter("@UDEF_4"    , objAcc.UDEF_4)); 

       ~~~~sqlReader = sqlProcedure.ExecuteReader(); 

       List<DTO.DTOAccount> Accounts = new List<DTO.DTOAccount>(); 
       // iterate through all values returned 
       while (sqlReader.Read()) { 
        DTO.DTOAccount tmpAccount    = new ca.eyecode.onecard.DTO.DTOAccount(); 
        tmpAccount.AccountId     = (String)sqlReader["ACCOUNT"]; 
        tmpAccount.Category      = (String)sqlReader["CATEGORY"]; 
        tmpAccount.Groups      = (String)sqlReader["GROUPS"]; 
        tmpAccount.Suffix      = (String)sqlReader["SUFFIX"]; 
        tmpAccount.UDEF_1      = ((String)sqlReader["UDEF_1"]).Trim(); 
        tmpAccount.UDEF_4      = ((String)sqlReader["UDEF_4"]).Trim(); 
        tmpAccount.FirstName     = ((String)sqlReader["FNAME"]).Trim(); 
        tmpAccount.LastName      = ((String)sqlReader["LNAME"]).Trim(); 
        tmpAccount.Picture      = (sqlReader["PICTURE"] == DBNull.Value ? String.Empty : (String)sqlReader["PICTURE"]).Trim(); 
        // add account items 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.ONEcardCash, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_1"])}); 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.Department, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_2"])}); 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.BookStore, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_3"])}); 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.TechBalance, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_4"])}); 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.Bonus1, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_5"])}); 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.MealPlanExtra, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_6"])}); 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.MealPlanDollars, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_7"])}); 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.AramarkCredit, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_8"])}); 
        tmpAccount.AccountItems.Add (new DTO.DTOAccountItem() { Account= AccountType.AramarkEmployees, Balance= Convert.ToDouble((Decimal)sqlReader["BALANCE_9"])}); 
        // Combine Totals to One Meal PLAN 
        tmpAccount.AccountItems[5].Balance += tmpAccount.AccountItems[6].Balance; 
        tmpAccount.AccountItems[5].Balance += tmpAccount.AccountItems[8].Balance; 
        tmpAccount.AccountItems[6].Balance = 0; 
        tmpAccount.AccountItems[8].Balance = 0; 

        Accounts.Add(tmpAccount); 
       } 
       return Accounts; 
      } 
      finally { 
       try { 
       if (sqlReader != null) { 
        sqlReader.Close(); 
       } 
       } 
       catch {} 
       this.close(); 
      } 

     } 
     return null; 
    }

ERROR

Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 4/19/2012 11:30:39 AM 
Event time (UTC): 4/19/2012 5:30:39 PM 
Event ID: 7715c17b872240829c3dfb562268998e 
Event sequence: 1253 
Event occurrence: 1 
Event detail code: 0 

Application information: 
    Application domain: /LM/W3SVC/997719702/Root-1-129793277036652335 
    Trust level: Full 
    Application Virtual Path:/
    Application Path: 
    Machine name: 

Process information: 
    Process ID: 820 
    Process name: w3wp.exe 
    Account name: 

Exception information: 
    Exception type: InvalidOperationException 
    Exception message: There is already an open DataReader associated with this Command which must be closed first. 
    at System.Data.SqlClient.SqlInternalConnectionTds.ValidateConnectionForExecute(SqlCommand command) 
    at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async) 
    at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) 
    at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) 
    at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) 
    at System.Data.SqlClient.SqlCommand.ExecuteReader() 
    at ca.eyecode.onecard.DAO.DAOAccount.GetAccounts(DTOAccount objAcc) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Models\ca.eyecode\onecard\DAO\DAOAccount.cs:line 47 
    at ca.eyecode.onecard.BL.BLAccount.AccountsGet(DTOAccount objAcc) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Models\ca.eyecode\onecard\BL\BLAccount.cs:line 228 
    at ca.eyecode.onecard.BL.BLAccount.AccountLogin(String CCID, String Password) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Models\ca.eyecode\onecard\BL\BLAccount.cs:line 171 
    at ca.eyecode.onecard.BL.BLFacade.AccountLogin(String CCID, String Password) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Models\ca.eyecode\onecard\BL\BLFacade.cs:line 36 
    at ca.eyecode.onecard.Controllers.HomeController.Index(String inpCCID, String inpPASS) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Controllers\HomeController.cs:line 77 
    at lambda_method(Closure , ControllerBase , Object[]) 
    at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) 
    at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) 
    at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.<InvokeActionMethodWithFilters>b__a() 
    at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) 
    at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) 
    at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) 
    at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) 
    at System.Web.Mvc.Controller.ExecuteCore() 
    at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.<BeginProcessRequest>b__4() 
    at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass1.<MakeVoidDelegate>b__0() 
    at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 
    at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) 



Request information: 
    Request URL: 
    Request path:/
    User host address: 
    User: 
    Is authenticated: False 
    Authentication Type: 
    Thread account name: 

Thread information: 
    Thread ID: 9 
    Thread account name: 
    Is impersonating: False 
    Stack trace: at System.Data.SqlClient.SqlInternalConnectionTds.ValidateConnectionForExecute(SqlCommand command) 
    at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async) 
    at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) 
    at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) 
    at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) 
    at System.Data.SqlClient.SqlCommand.ExecuteReader() 
    at ca.eyecode.onecard.DAO.DAOAccount.GetAccounts(DTOAccount objAcc) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Models\ca.eyecode\onecard\DAO\DAOAccount.cs:line 47 
    at ca.eyecode.onecard.BL.BLAccount.AccountsGet(DTOAccount objAcc) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Models\ca.eyecode\onecard\BL\BLAccount.cs:line 228 
    at ca.eyecode.onecard.BL.BLAccount.AccountLogin(String CCID, String Password) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Models\ca.eyecode\onecard\BL\BLAccount.cs:line 171 
    at ca.eyecode.onecard.BL.BLFacade.AccountLogin(String CCID, String Password) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Models\ca.eyecode\onecard\BL\BLFacade.cs:line 36 
    at ca.eyecode.onecard.Controllers.HomeController.Index(String inpCCID, String inpPASS) in C:\inetpub\wwwroot\ONEcard\OneAccount\OneAccount\Controllers\HomeController.cs:line 77 
    at lambda_method(Closure , ControllerBase , Object[]) 
    at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) 
    at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) 
    at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.<InvokeActionMethodWithFilters>b__a() 
    at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) 
    at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) 
    at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) 
    at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) 
    at System.Web.Mvc.Controller.ExecuteCore() 
    at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.<BeginProcessRequest>b__4() 
    at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass1.<MakeVoidDelegate>b__0() 
    at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 
    at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

来源

2012-04-19 Victor

你为什么不捕捉异常？ – Jason 2012-04-19 19:34:35

@Jason;然后什么？ – BeemerGuy 2012-04-19 19:38:15

如果这是整个网站崩溃，我至少会尝试进食异常并将用户发送到错误页面以查看是否可以防止网站崩溃。然后我将重点放在潜在的问题上。 – Jason 2012-04-19 19:46:05

问题是我有一个尝试finally代码块。在处理的异常中，相关的finally块将保证运行。但是，如果异常未处理，finally块的执行取决于如何触发异常展开操作。这反过来又取决于你的电脑设置方式。

为了确保finally块每次不能省略catch块时都执行。 http://msdn.microsoft.com/en-us/library/zwc8s4fz(v=vs.100).aspx

来源

2012-04-26 18:51:12 Victor

除非你真正需要的连接对象的其他地方，那么我的方法重构的东西，如：

public List<DTO.DTOAccount> GetAccounts(DTO.DTOAccount objAcc) 
{ 
    //-- reset error variables 
    resetError(); 

    List<DTO.DTOAccount> Accounts = new List<DTO.DTOAccount>(); 

    try 
    { 
     using (SqlConnection dbconn = new SqlConnection("your-connection-string")) 
     { 
      using (SqlCommand sqlProcedure = new SqlCommand("[dbo].[sp_Select_ONECARD_ACCOUNTS]", dbconn)) 
      { 
       sqlProcedure.CommandType = System.Data.CommandType.StoredProcedure; 
       sqlProcedure.Parameters.Add(new SqlParameter("@ACCOUNT", objAcc.AccountId)); 
       sqlProcedure.Parameters.Add(new SqlParameter("@UDEF_4", objAcc.UDEF_4)); 
       dbconn.Open(); 
       using (SqlDataReader sqlReader = sqlProcedure.ExecuteReader()) 
       { 
        while (sqlReader.Read()) 
        { 
         DTO.DTOAccount tmpAccount = new ca.eyecode.onecard.DTO.DTOAccount(); 
         tmpAccount.AccountId = (String)sqlReader["ACCOUNT"]; 
         tmpAccount.Category = (String)sqlReader["CATEGORY"]; 
         tmpAccount.Groups = (String)sqlReader["GROUPS"]; 
         tmpAccount.Suffix = (String)sqlReader["SUFFIX"]; 
         tmpAccount.UDEF_1 = ((String)sqlReader["UDEF_1"]).Trim(); 
         tmpAccount.UDEF_4 = ((String)sqlReader["UDEF_4"]).Trim(); 
         tmpAccount.FirstName = ((String)sqlReader["FNAME"]).Trim(); 
         tmpAccount.LastName = ((String)sqlReader["LNAME"]).Trim(); 
         tmpAccount.Picture = (sqlReader["PICTURE"] == DBNull.Value ? String.Empty : (String)sqlReader["PICTURE"]).Trim(); 
         // add account items 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.ONEcardCash, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_1"]) }); 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.Department, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_2"]) }); 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.BookStore, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_3"]) }); 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.TechBalance, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_4"]) }); 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.Bonus1, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_5"]) }); 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.MealPlanExtra, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_6"]) }); 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.MealPlanDollars, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_7"]) }); 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.AramarkCredit, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_8"]) }); 
         tmpAccount.AccountItems.Add(new DTO.DTOAccountItem() { Account = AccountType.AramarkEmployees, Balance = Convert.ToDouble((Decimal)sqlReader["BALANCE_9"]) }); 
         // Combine Totals to One Meal PLAN 
         tmpAccount.AccountItems[5].Balance += tmpAccount.AccountItems[6].Balance; 
         tmpAccount.AccountItems[5].Balance += tmpAccount.AccountItems[8].Balance; 
         tmpAccount.AccountItems[6].Balance = 0; 
         tmpAccount.AccountItems[8].Balance = 0; 

         Accounts.Add(tmpAccount); 
        } 
       } 
      } 
     } 
    } 
    catch 
    { 
     // do some error handling. 
    } 

    return Accounts; 
}

来源

2012-04-19 19:52:55

可以肯定的，你可以开始使用请在SqlDataReader附近发一条using声明。对其他元素也一样。这样你就可以确定他们总是被处置和关闭。

接下来，确保您不嵌套SqlDataReaders。尽快关闭它们，然后依次进行数据访问。这应该解决这个问题。

来源

2012-04-19 19:58:00 Bertvan

ASP.NET应用程序 - 调试步骤

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