Name does not exist in the current context

Question

So  I m working on this project between my laptop and my desktop   The project works on the laptop  but now having copied the updated source code onto the desktop  I have over 500 errors in the project  all of them are        The name  does not exist in the current context   Here s one example     Jobs aspx     lt    Page Title    Language  C   MasterPageFile    Members Members master  AutoEventWireup  true  CodeFile  Jobs aspx cs  Inherits  Members Jobs    gt    lt    Register Namespace  AjaxControlToolkit  Assembly  AjaxControlToolkit  TagPrefix  aj    gt    lt asp Content ID  Content1  ContentPlaceHolderID  head  runat  server  gt   lt  asp Content gt   lt asp Content ID  Content2  ContentPlaceHolderID  ContentPlaceHolder1  runat  server  gt       lt asp UpdatePanel runat  server  ID  upJobs  gt           lt ContentTemplate gt               lt  -- page content goes here -- gt           lt  ContentTemplate gt       lt  asp UpdatePanel gt   lt  asp Content gt    Jobs aspx cs    public partial class Members Jobs   System Web UI Page       protected void Page Load object sender  EventArgs e                if   IsPostBack                        loadJobs                gvItems Visible   false              loadComplexes                loadBusinesses                loadSubcontractors                loadInsurers                 pnlCallback Visible   false              pnlInsurer Visible   false                          more goes down here     Here s a sample of the designer cs file     namespace stman Members         public partial class Jobs                 lt summary gt              upJobs control               lt  summary gt               lt remarks gt              Auto-generated field              To modify move field declaration from designer file to code-behind file               lt  remarks gt          protected global  System Web UI UpdatePanel upJobs            I know this error means that the control being referenced generally doesn t exist or is not a part of the class that s referencing it  but as far as I can see  that isn t the case here   Can anyone provide some insight

User · Answer

I solved mine by using an Import directive under my Page directive. You may also want to add the namespace to your Inherits attribute of your Page directive.

Since it appears that your default namespace is "stman.Members", try: <%@ Page Title="" Language="C#" MasterPageFile="~/Members/Members.master" AutoEventWireup="true" CodeFile="Jobs.aspx.cs" Inherits="stman.Members.Members_Jobs" %> <%@ Import Namespace="stman.Members"%>

Additionally, data that I wanted to pass between aspx.cs and aspx, I put inside a static class inside the namespace. That static class was available to move data around in the name space and no longer has a "not in context" error.

User · Answer

In case someone being a beginner who tried all of the above and still didn t manage to get the project to work  Check your namespace  In an instance where you copy code from one project to another and you forget to change the namespace of the project then it will also give you this error   Hope it helps someone

User · Answer

I had this problem in my main project when I referenced a dll file   The problem was that the main project that referenced the dll was targeting a lower framework version than that of the dll   So I upped my target framework version  Right-click project -  Application -  Target framework  and the error disappeared

User · Answer

The project works on the laptop  but now having copied the updated source code onto the desktop        I did something similar  creating two versions of a project and copying files between them   It gave me the same error   My solution was to go into the project file  where I discovered that what had looked like this    lt Compile Include  App Code Common Pair cs    gt   lt Compile Include  App Code Common QueryCommand cs    gt    Now looked like this    lt Content Include  App Code Common Pair cs  gt     lt SubType gt Code lt  SubType gt   lt  Content gt   lt Content Include  App Code Common QueryCommand cs  gt     lt SubType gt Code lt  SubType gt   lt  Content gt    When I changed them back  Visual Studio was happy again

User · Answer

I also faced a similar issue  the problem was the form was inside a folder and the file  aspx designer cs I had the namespace referencing specifically to that directory  which caused the error to appear in several components   El nombre no existe en el contexto actual  This in your case  a possible solution is to leave the namespace line of the Members Jobs aspx designer cs file specified globally  ie change this  namespace stman Members    For this  namespace stman    It s what helped me solve the problem   I hope to be helpful

User · Answer

Same issue happened with me when i mistakenly added some text in front of the top directive of the master page all the controls across all the page included in my project started showing  does not exist in the current context  After spending much time across the forum and self analysis  i found the mistakenly added text and removed but it does not solved the problem  Then i had to click on each error to open the associated page so that VS can load the page and recognize it  once the code was loaded in VS  error from those particular page started disappearing because VS recognized it  clicking on each error  loading each page in VS editor did the trick for me and you have to do it only once because later it will be automatically recognized by VS  I would say it is a Visual Studio Glitch

User · Answer

In our case  beside changing ToolsVersion from 14 0 to 15 0 on  csproj projet file  as stated by Dominik Litschauer  we also had to install an updated version of MSBuild  since compilation is being triggered by a Jenkins job  After installing Build Tools for Visual Studio 2019  we had got MsBuild version 16 0 and all new C  features compiled ok

User · Answer

From the MSDN website       This error frequently occurs if you declare a variable in a loop or a   try or if block and then attempt to access it from an enclosing code   block or a separate code block    So declare the variable outside the block

User · Answer

I also faced a similar issue  The reason was that I had the changes done in the  aspx page but not the designer page and hence I got the mentioned error  When the reference was created in the designer page I was able to build the solution

User · Answer

I came across a similar problem with a meta tag  In the designer cs  the control was defined as   protected global  System Web UI HtmlControl HtmlGenericControl metatag    I had to move the definition to the  aspx cs file and define as   protected global  System Web UI HtmlControl HtmlMeta metatag

User · Answer

Jobs aspx  This is the phyiscal file -  CodeFile  Jobs aspx cs    This is the class which handles the events of the page -  Inherits  Members Jobs   Jobs aspx cs  This is the partial class which manages the page events -  public partial class Members Jobs   System Web UI Page  The other part of the partial class should be -  public partial class Members Jobs this is usually the designer file   you dont need to have partial classes and could declare your controls all in 1 class and not have a designer file   EDIT 27 09 2013 11 37  if you are still having issues with this I would do as Bharadwaj suggested and delete the designer file  You can then right-click on the page  in the solution explorer  and there is an option  something like  Convert to Web Application   which will regenerate your designer file

[c#] Name does not exist in the current context

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