The name does not exist in the current context

Question

1.00/5 (1 vote)

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This error occurs in the following method, please help

What I have tried:

[HttpPost]
   public async Task<IActionResult> DeatailsAnalysis(int carId, string selectedDate)
   {
       DateTime selectedDay = PersianToGregorian(selectedDate, out int selectedPersianYear);
       SqlConnection connection = null;
       SqlCommand command = null;
       var model = new List<InventoryAnalysisReportViewModel>();

       try
       {
           connection = DbContext.Database.GetDbConnection() as SqlConnection;
           command = new SqlCommand("dbo.DeatailsInventoryAnalysisReportPerDay")
           {
               CommandType = CommandType.StoredProcedure,
               Connection = connection
           };
           command.Parameters.Add(new SqlParameter("@SelectedDay", selectedDay));
           command.Parameters.Add(new SqlParameter("@CarId", carId));

           if (connection.State != ConnectionState.Open)
               await connection.OpenAsync();

           using var reader = await command.ExecuteReaderAsync();
           while (await reader.ReadAsync())
           {
               model.Add(new InventoryAnalysisReportViewModel
               {
                   CarId = reader.GetInt32(reader.GetOrdinal("CarID")),
                   CarTitle = reader.GetString(reader.GetOrdinal("CarTitle")),
                   ProvisionalDeliveryQty = reader.GetInt32(reader.GetOrdinal("ProvisionalDeliveryQty")),
                   SectionsQty = reader.GetInt32(reader.GetOrdinal("SectionsQty")),
                   ParkingInventoryQty = reader.GetInt32(reader.GetOrdinal("ParkingInventoryQty")),
                   //InventoryQty = reader.GetInt32(reader.GetOrdinal("InventoryQty")),
                   TotalDeatails = reader.GetInt32(reader.GetOrdinal("TotalDeatails")),
                   YearType = Convert.ToInt32(reader.GetValue(reader.GetOrdinal("CarModels"))) == selectedPersianYear
                               ? YearsType.Currentyear
                               : YearsType.Pastyears
               });
           }
       }
       catch (Exception ex)
       {
           throw ex;
       }
       finally
       {
           if (command != null)
           {
               command.Dispose();
           }
           if (connection.State != ConnectionState.Closed)
           {
               connection.Close();
               connection.Dispose();
           }
       }

       return Json(model);
   }

Posted 2-Oct-20 18:49pm

Member 14615938

Updated 2-Oct-20 22:21pm

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Comments

Patrice T 3-Oct-20 1:50am

Give exact error message and tell line of error.

2 solutions

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OriginalGriff · Answer 1 · 2020-10-02T20:01:00

The error mesna exactly what it says: you are using a variable, property, or method name that does not exist in the current context.
It may have gone out of scope by the time you use it:

C#

while (a < b)
   {
   int c = Foo(a);
   a++;
   }
Bar(c);

By the time you call Bar, c has gone out of scope.
Or it may be that you have misspelled something.
Or perhaps you are missing a using statement.

We can't tell: we can't compile your code in isolation and get the same result you do.

So double click the error message and VS will take you directly to the error line. Look for a name that is underlined in red and then try to find it's definition, or where you think it is defined.

Sorry, but we can't do that for you!

Richard MacCutchan · Answer 2 · 2020-10-02T22:21:00

Solution 2

C#

DateTime selectedDay = PersianToGregorian(selectedDate, out int selectedPersianYear);

I think that syntax is incorrect, but also you have not declared selectedPersianYear.

Posted 2-Oct-20 22:21pm

Richard MacCutchan

Updated 5-Oct-20 4:59am

v2

Comments

Richard Deeming 5-Oct-20 10:56am

That's a new syntax added in C# 7, which lets you declare an out variable inline:
What's New in C# 7.0 - C# Guide | Microsoft Docs[^]

Richard MacCutchan 5-Oct-20 10:58am

:(

Member 14615938 5-Oct-20 11:57am

help meeeee

Richard MacCutchan 5-Oct-20 12:35pm

We cannot help you unless you provide all the information. What is the exact error message, and which line does it occur on?

ZurdoDev 5-Oct-20 13:37pm

Strikethrough is a new c# 7 syntax?

Richard MacCutchan 5-Oct-20 14:36pm

Certainly makes my code run faster.

ZurdoDev 5-Oct-20 14:57pm

;)