Parser Error when deploy ASP NET application

Question

I ve finished simple asp net web application project  compiled it  and try to test on local IIS  I ve create virtual directory  map it with physical directory  then put all necessary files there  including bin folder with all  dll s In the project settings  build section  output path is bin  So when i try to browse my app i got   Server Error in     Application  --------------------------------------------------------------------------------  Parser Error  Description  An error occurred during the parsing of a resource required to service this request  Please review the following specific parse error details and modify your source file appropriately    Parser Error Message  Could not load type  AmeriaTestTask Default    Source Error     Line 1    lt    Page Language  C   AutoEventWireup  true  CodeBehind  Default aspx cs  Inherits  AmeriaTestTask Default    gt  Line 2    Line 3    lt    Register assembly  AjaxControlToolkit  namespace  AjaxControlToolkit  tagprefix  ajaxToolkit    gt    Source File   virtual default aspx    Line  1      Have read similar problem posts and solution was to set output path to bin   but it is defalut for my project

User · Answer

When you add subfolders and files in subfolders the DLL files in Bin folder also may have changed  When I uploaded the updated DLL file in Bin folder it solved the issue  Thanks to Mayank Modi who suggested that or hinted that

User · Answer

I am too late but let me explain how I solved this problem   This problem is basically because of improper folders solution structure   this issue may occur because 1  If you have copied project from other location and trying to run the project   so to resolve this go to original location and crosscheck the folders and files again   this works for me

User · Answer

I ve solve the issue  The solution is to not making virtual dir manualy and then copy app files here  but use  Add Application     option  Here is post that helped me http   social msdn microsoft com Forums en-US winformssetup thread 7ad2acb0-42ca-4ee8-9161-681689b60dda

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In my case I missed the compile tag in the  csproj file   lt Compile Include  Global asax cs  gt     lt DependentUpon gt Global asax lt  DependentUpon gt     lt CopyToOutputDirectory gt Always lt  CopyToOutputDirectory gt   lt  Compile gt

User · Answer

Interesting all the different scenarios    In my case   I had uploaded my site to GoDaddy and was getting the Parser Error   I resolved it by commenting out compilers under system codedom in web config  And also add a custom profile for publishing that would precompile during publishing      lt system codedom gt       lt  --GoDaddy does not compile -- gt       lt  -- lt compilers gt         lt compiler language  c  cs csharp  extension   cs  type  Microsoft CodeDom Providers DotNetCompilerPlatform CSharpCodeProvider  Microsoft CodeDom Providers DotNetCompilerPlatform  Version 2 0 0 0  Culture neutral  PublicKeyToken 31bf3856ad364e35  warningLevel  4  compilerOptions   langversion default  nowarn 1659 1699 1701    gt         lt compiler language  vb vbs visualbasic vbscript  extension   vb  type  Microsoft CodeDom Providers DotNetCompilerPlatform VBCodeProvider  Microsoft CodeDom Providers DotNetCompilerPlatform  Version 2 0 0 0  Culture neutral  PublicKeyToken 31bf3856ad364e35  warningLevel  4  compilerOptions   langversion default  nowarn 41008  define  MYTYPE   amp quot Web  amp quot   optionInfer     gt       lt  compilers gt -- gt     lt  system codedom gt

User · Answer

Looking at the error message  part of the code of your Default aspx is     lt    Page Language  C   AutoEventWireup  true  CodeBehind  Default aspx cs  Inherits  AmeriaTestTask Default    gt    but AmeriaTestTask Default does not exists  so you have to change it  most probably to the class defined in Default aspx cs  For example for web api aplications  the class defined in Global asax cs is   public class WebApiApplication   System Web HttpApplication and in the asax page you have     lt    Application Codebehind  Global asax cs  Inherits  MyProject WebApiApplication  Language  C     gt

User · Answer

Sometimes it happens if you either    Clean solution build or  Rebuild solution build    If it  suddenly  happens after such  and your code has build-time errors then try fixing those errors first    What happens is that as your solution is built  DLL files are created and stored in the projects bin folder  If there is an error in your code during build-time  the DLL files aren t created properly which brings up an error   A  quick fix  would be to fix all your errors or comment them out  if they wont affect other web pages   then rebuild project solution  If this doesn t work then try changing  CodeBehind  blahblahblah aspx cs    to  CodeFile  blahblahblah aspx cs   Note  Change  blahblahblah  to the pages real name

User · Answer

Faced the same error when I had a programming error in one of the ASHX files  it was created by copying another file  and inherited its class name in the code behind statement  There was no error when all ASPX and ASHX files ran in IIS Express locally  but once deployed to the server they stopped working  all of them    Once I found that one ASHX page and fixed the class name to reflect its own class name  all ASPX and ASHX files started working fine in IIS

User · Answer

Very old question here  but I ran into the same error and none of the provided answers solved the issue     My issue occurred because I manually changed the namespace and assembly names of the project after initial creation   Took me a little bit to notice that the namespace in the Inherits attribute didn t match the updated namespace   Updating that namespace in the Global asax markup to match the apps namespace fixed the error for me

User · Answer

In my case  There were new code branch and old code branch was deployed locally in IIS  So it was pointing to old branch code that was not available  So i had deployed my code to IIS with new branch and it is working now

User · Answer

After a lot of searching  i found the problem was in my project dll file  i cleaned and rebuild my project when there were compilation errors     simple solution is to remove all compilation errors in all pages either by removing contents or commenting lines  then clean and rebuild your project     this will sort out your problem

User · Answer

I have solved it this way   Go to your project file let s say project name bin and delete everything within the bin folder   this will then give you another error which you can solve this way   then in your visual studio right click project s References folder  to open NuGet Package Manager   Go to browse and install  DotNetCompilerPlatform

User · Answer

Try changing CodeBehind  Default aspx cs  to CodeFile  Default aspx cs

User · Answer

This happens when the files inside the Debug and Release folder are not created properly Either they are having wrong reference or having overwritten many times   I have faced the same problem in which  i everything works fine when we build the solution  but when i publish the website it gives me same error  I have solved this in following manner    Go to your Solution Explorer in Visual Studio and click on show hidden files  if they are not showing     you will find a folder named obj  open it   Here there are again 2 folder named respectively as Debug and Release  Now  delete the content from these two folder  Make sure that you do not delete the folders Debug and Release  Only delete the files and folders inside Debug and Release folder  Now build and publish your solution and everything will work like charm

User · Answer

IIS 7 or IIS 8 or 8 5 version - if you are migrating from 2003 to 2012 2008 make sure web service are in application type instead virtual directory

User · Answer

I know i am too late to answer but it could help others and save time   Following might be other solutions   Solution 1  See Creating a Virtual Directory for Your Application for detailed instructions on creating a virtual directory for your application   Solution 2  Your application   s Bin folder is missing or the application   s DLL file is missing  See Copying Your Application Files to a Production Server for detailed instructions   Solution 3  You may have deployed to the web root folder  but have not changed some of the settings in the Web config file  See Deploying to web root for detailed instructions   In my case Solution 2 works  while deploying to server some DLL s from bin directory has not been uploaded to server successfully  I have re-upload all DLL s again and it works    Here is the reference link to solve asp net parser error

User · Answer

I had the same issue  Ran 5 or 6 hours of researches  A simple solution seems to be working  I just had to convert my folder to application from iis  It worked fine   this was a scenario where I had done a migration from server 2003 to server 2008 R2   1  Open IIS and select the website and the appropriate folder that needs to be converted  Right-click and select Convert to Application

[asp.net] Parser Error when deploy ASP.NET application

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