The problem is that the web page was not deployed after migrating using another computer and also, the migration file was deleted.
the error was
The model backing the 'ProjectContext' context has changed since the
database was created. Consider using Code First Migrations to update
the database
Description: An unhandled exception occurred during the execution of
the current web request. Please review the stack trace for more
information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: The model backing
the 'ProjectContext' context has changed since the database was
created. Consider using Code First Migrations to update the database
Source Error:
An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of
the exception can be identified using the exception stack trace below.
is there any way to solve this problem from my computer? or there is another problem behind this?
What the message says is that your database model is out of sync with your Entity Framework 'Code First' model / code.
To overcome this issue, you can use Code First Migrations. The linked tutorial on MSDN explains what you should do. You effectively have to use the Package Console and some C# code to migrate one version to another. This is something you have to do while coding the project. If you release it, the code can automatically update your database model to match your Entity Framework Code First code.
Related
I am recently started working on Microsoft Sync framework 2.1 based project, which already developed, requirement is simple to sync db(server to client and client to server), but i am getting very frequent error stating blah_blah_selectchanges already exist(procedure), once i will delete all mentioned procedure it will work fine.. then again when i am trying with another machine this error comes again.. Now i am not getting a idea how to overcome with this error... I did some research and found additional tables(under sync db) created by the provisioning process: Products_Tracking, schema_info, scope_config, and scope_info. There are also other database objects such as triggers and stored procedures created by the provisioning process. I have one doubt if additional table/Procedure/Triggers is already exist on sync schema why it is creating again..
check how you're provisioning. Are you checking if the scope exists already? if there are existing scopes for the table and you want to add a new scope, you should specify SetCreateProceduresForAdditionalScopeDefault.
I have created a simple C# MVC website with Entity Framework.
Created a simple model, DBContext, Controller and View.
Everything works great - but as soon as I lock down the SQL User to only query the SQL View that is needed I get the following:
An exception of type 'System.Data.SqlClient.SqlException' occurred in EntityFramework.dll but was not handled in user code
Additional information: CREATE TABLE permission denied in database 'MyDatabase'.
Again, everything works if the user has the CREATE TABLE permission but this shouldn't be necessary.
How to avaid that?
Best regards
I've a question. In a web site created in asp.net with vb.net in code behind, how I can show message of exceptions from methods in app_codevb folder.
Example a method return a table with a list of customers, but occurs a error of timeout or error in sintax.
How I can show the user in the form the error occurred in app_codevb folder?
If you don't do anything then it will automatically show any unhandled errors on the page.
Somewhat in this format
Server Error in '/WebApp' Application.
Error Message...
Description: ...
Exception Details: ...
Source Error: ...
Source File: ...
Stack Trace: ...
Version Information: ...
However, it is not a good thing. It looks ugly and breaks your site. It also shows your immaturity in programming besides opening your site for attacks. The better way is to use Try... Catch blocks where there is a possibility of errors occurring in your application and handle the error appropriately.
I have an EntityFramework project running off MySql that runs great locally as well as on a dedicated server, however I'm trying to move this project to HostGator and I'm receiving the following error:
Schema specified is not valid. Errors:
App_Code.WireWeld.ssdl(2,88) : error 0002: Request failed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.MetadataException: Schema specified is not valid. Errors:
App_Code.WireWeld.ssdl(2,88) : error 0002: Request failed.
I know the database is correct as I can connect via Navicat and see its contents. I'm pretty sure the connection string is correct, I have the proper username and password.
I'm really stuck on this one and would appreciate any help possible.
If you are using more than one model in your project I advice you to have a look into that topic as it describes possible solutions to the problem.
If you are not using multiple models than this looks like a file permission issue to me.
Perhaps in the hosted environment, the account underwhich your application is running doesn't have access to where the metadata files are located?
You should make sure you have permission (read/write are required). If this is not an option for you than the only go would be to embed the metadata in the assembly directly and use a res:// style connection string.
If you're using SQL server and have 2 projects - one is a class library and the 2nd one uses that class library in main project, then place both dll from class library project to main project refrence.
1-EntityFramework.dll
2-EntityFramework.SqlServer.dll
I'm getting the Unable to create object context error when using Entity framework in ASP.NET MVC.
Background
Every time I POST to the controller I'm not getting a response back. I tried going directly to the method of the controller /Data/GetAll, and receive this error:
Error
The specified named connection is
either not found in the configuration,
not intended to be used with the
EntityClient provider, or not valid.
Description: An unhandled exception
occurred during the execution of the
current web request. Please review the
stack trace for more information about
the error and where it originated in
the code.
Exception Details:
System.ArgumentException: The
specified named connection is either
not found in the configuration, not
intended to be used with the
EntityClient provider, or not valid.
Code Snippet that throws exception:
public class TrackItContextCreator {
public ObjectContext Create() {
ObjectContext context = new ObjectContext("name=TrackItDBEntities");
context.DefaultContainerName = "TrackItDBEntities";
return context;
}
}
Web.config
<add name="TrackItDBEntities" connectionString="metadata=res://*
/EntityFramework.TrackItDBModel.csdl|res://*/EntityFramework.TrackItDBModel.ssdl|res:
//*/EntityFramework.TrackItDBModel.msl;provider=System.Data.SqlClient;provider
connection string="Data Source=host;User ID=myuseracc;Password=******;
MultipleActiveResultSets=True"" providerName="System.Data.EntityClient" />
What could I be missing?
From the comments, I think I know what the problem is.
If the model is in a separate assembly, you basically have to make sure that the connection string is specified in the app.config/web.config of every assembly that uses the model. I'm guessing that you only have it in the model project.
See this question for another example, and this thread on MSDN. Both similar issues involving models being in separate projects/assemblies. I'm 99% sure that this is related to your issue.
If you develop web app with class libarary you should add databases' connectionStrings to both of Web.Config and App.Config.