ASP.NET应用程序-要采取的调试步骤

我开发的一个应用程序每周大约崩溃2次。当它崩溃时，会关闭整个应用程序，直到应用程序池被回收。我无法在开发环境中重现错误

下面我粘贴了导致崩溃的代码和来自应用程序事件查看器的错误消息导致应用程序崩溃的行以~~~开头。消息指出我有一个打开的DataReader，但我检查了我的代码，并且总是关闭我的DataReader和连接

我不知道我应该采取什么步骤来解决这个错误。任何帮助都将不胜感激。谢谢大家!

 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;
    }

public bool open（）{
//--检查连接是否关闭
if（this.dbconn.State==System.Data.ConnectionState.Closed）{
试一试{
this.dbconn.Open（）；
}
捕获（例外情况除外）{
this.errorCode=（int）DatabaseErrorType.DBOpenFailed；
this.errorMessage=System.Web.HttpUtility.HtmlEncode（例如Message）；
掷骰子；
}
}
返回true；
}
///关闭连接对象
公共图书馆关闭（）{
如果（！（this.dbconn==null））{
if（！（this.dbconn.State==System.Data.ConnectionState.Closed））{
试一试{
this.dbconn.Close（）；
}
捕获（例外情况除外）{
this.errorCode=（int）DatabaseErrorType.DBCloseFailed；
this.errorMessage=System.Web.HttpUtility.HtmlEncode（例如Message）；
返回false；
}
}
}
返回true；
}
//获取多个帐户
公共列表GetAccounts（DTO.DTOAccount objAcc）{
//--重置错误变量
重置错误（）；
//确保连接已打开
if（this.open（））{
SqlDataReader sqlReader=null；
试一试{
SqlCommand sqlProcedure=newsqlcommand（“[dbo].[sp\u Select\u ONECARD\u ACCOUNTS]”，this.dbconn）；
sqlProcedure.CommandType=System.Data.CommandType.StoredProcess；
添加（新的SqlParameter（“@ACCOUNT”，objAcc.AccountId））；
添加（新的SqlParameter（@UDEF_4），objAcc.UDEF_4））；
~~~~sqlReader=sqlProcedure.ExecuteReader（）；
列表帐户=新列表（）；
//遍历返回的所有值
while（sqlReader.Read（））{
DTO.DTOAccount tmpAccount=新的ca.eyecode.onecard.DTO.DTOAccount（）；
tmpAccount.AccountId=（字符串）sqlReader[“ACCOUNT”]；
tmpAccount.Category=（字符串）sqlReader[“Category”]；
tmpAccount.Groups=（字符串）sqlReader[“Groups”]；
后缀=（字符串）sqlReader[“后缀”]；
tmpAccount.UDEF_1=（（字符串）sqlReader[“UDEF_1]”）。Trim（）；
tmpAccount.UDEF_4=（（字符串）sqlReader[“UDEF_4]”）。Trim（）；
tmpAccount.FirstName=（（字符串）sqlReader[“FNAME”]）.Trim（）；
tmpAccount.LastName=（（字符串）sqlReader[“LNAME”]）.Trim（）；
tmpAccount.Picture=（sqlReader[“Picture”]==DBNull.Value？String.Empty:（String）sqlReader[“Picture”]）.Trim（）；
//添加帐户项目
tmpAccount.AccountItems.Add（new DTO.DTOAccountItem（）{Account=AccountType.ONEcardCash，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_1”]）；
tmpAccount.AccountItems.Add（新DTO.DTOAccountItem（）{Account=AccountType.Department，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_2”]））；
tmpAccount.AccountItems.Add（new DTO.DTOAccountItem（）{Account=AccountType.BookStore，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_3”]）；
tmpAccount.AccountItems.Add（新DTO.DTOAccountItem（）{Account=AccountType.TechBalance，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_4”]））；
tmpAccount.AccountItems.Add（新的DTO.DTOAccountItem（）{Account=AccountType.Bonus1，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_5”]）；
tmpAccount.AccountItems.Add（新的DTO.DTOAccountItem（）{Account=AccountType.mealplan额外，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_6”]）；
tmpAccount.AccountItems.Add（新DTO.DTOAccountItem（）{Account=AccountType.MealPlanDollars，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_7”]）；
tmpAccount.AccountItems.Add（新DTO.DTOAccountItem（）{Account=AccountType.AramarkCredit，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_8”]）；
tmpAccount.AccountItems.Add（new DTO.DTOAccountItem（）{Account=AccountType.AramarkEmployees，Balance=Convert.ToDouble（（十进制）sqlReader[“Balance_9”]）；
//将总数合并到一份用餐计划中
tmpAccount.AccountItems[5]。余额+=tmpAccount.AccountItems[6]。余额；
tmpAccount.AccountItems[5]。余额+=tmpAccount.AccountItems[8]。余额；
tmpAccount.AccountItems[6]。余额=0；
tmpAccount.AccountItems[8]。余额=0；
添加（tmpAccount）；
}
归还账户；
}
最后{
试一试{
if（sqlReader！=null）{
sqlReader.Close（）；
}
}
捕获{}
这个。关闭（）；
}
}
返回null；
}

错误

事件代码：
 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)

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;
}