Im trying to use Entity Framework on my .NET 4.0 Web Site. I already have installed Entity Framework 6.1 and i "Add New" ADO.NET Entity Data Model to my site using a valid connection string , and I select my table. I know this is a valid table with several columns and rows of data. After the creation is finished I am left with only a .cs file with no properties and a new connection string added to the web.config, but there is no .edmx file created. I know the SQL user in the Con String has read/write permissions and this is a valid table. Any clue as to what i may be doing wrong?
Have you tried to change the values of this new connection string with your values?
Take a look of this link and retry..
https://msdn.microsoft.com/en-us/data/jj206878.aspx
PS: I think that you should have created a "Project" and not a "new WebSite" using:
"Folder>New>Project> ASP Web App" in VS
Doing this you have all ready to go (references, EF etc..) then you could even start from a empty virgin model, or EF designer from database where you could easly manage or create entities, relations etc.
Related
I am trying to update a record in a table using Entity Framework Core in ASP.NET Core MVC, but I am getting an exception while calling
context.SaveChanges()
saying that record is not there or deleted.
But that record with same id is there in table. I checked it with debugging.
I am suspecting you are referring to the wrong database.
I have encounter this problem before and the problem is that while I created the connection to the database to generate the model, VS let me choose whether to include the .mdf in the solution and change the connection string.
Please double check your connection string is pointing to the right database.
Right click on the EF Model Designer surface and choose Update Model from Database.
In the dialog box that pops up, you should be able to browse the database, and select objects to add. But in this case, nothing can be selected:
Removing the Connection String from the App.Config and allowing the Designer to re-add it did not resolve the issue.
The credentials used in the Connection String when copied and pasted in SSMS.
The database can be browsed from the VS Server Explorer window.
Creating a new blank EF project and repeating from there works fine.
What could be causing this?
One of 2 problems exist, the Model already has the Tables/SP/View you are looking for or the Login does not have the Authority the access those Tables/SP/View.
One of the factor unable to select any checkbox in Update Wizard is you don't have any updates in your database, therefore entity framework doesn't allow you to select.
If your scenario is not the factor above, you may try the method I listed below:
I had this issue too and I noticed that I didn't grant the db_owner under Database role membership for my database (eg 22Aug_M) in Microsoft SQL Server Management Studio.
After I checked it and it works as normal.
I have no experience with web hosting. This would be my first application to host.I have an MVC 5 application with Entity Framework. It is locally using two DBs, the one that I created (BailBond) and the default one named "aspnet-BailBondMS-20160913064154" because my project name is BailBondMS. When I publish it winhost, the default DB is not connected to the application. I manually tried to create a DB in my site database in winhost with the same name but it wont let me do it because the name is too long. I then shortened the name. The problem now is that I cannot update the default DB name in Visual Studio to match the one in my control panel in winhost.
What should I do? What am I doing wrong? Thank you for your help.
I am porting my SQL Server database to Azure SQL. The database has been replicated correctly and is now accessible from my existing web application.
However, the first time it was executed with the Azure SQL connection string, it showed "Invalid Object" for a table name used on the log in page.
I was able to correct it by adding the schema name [dbusername].[tablename] in place of [tablename] in the code.
Now since it is an extensive application, with over 300 ASPX pages and 30 tables, I'm wondering do I have to use the Find-Replace tool in Visual Studio or am I missing a setting that can help me to assign the default schema name while executing all queries ?
Set the default schema for your user.
USE MyDataBase;
GO
ALTER USER MyUser WITH DEFAULT_SCHEMA=MySchema;
GO
I believe this article will help you.
http://blog.sqlauthority.com/2008/12/26/sql-server-fix-error-msg-15151-level-16-state-1-line-2-cannot-alter-the-login-sa-because-it-does-not-exist-or-you-do-not-have-permission/
I'm using ASP.NET C# with database MYSQL, I follow this step on creating a database model with Entity Data Model Wizard http://www.asp.net/mvc/tutorials/movie-database/create-a-movie-database-application-in-15-minutes-with-asp-net-mvc-cs. When I run this, it showed error --> Unable to generate the model because of the following exception: 'The provider did not return a ProviderManifestToken string. Access denied for user 'root'#'localhost' (using password: NO).
I already have connection with the same connection string uses on webconfig MySQLMembershp I copied from this How do I setup ASP.NET MVC 2 with MySQL? which is working.
if they have the same connection string uses this should work, but why is not working when I create a database model.
First of all EF model connectionstring and Asp.NET membership connectionstring is different. Secondly you may have to see how EF model works using MySQL database here
Getting MySQL work with Entity Framework 4.0
It seems like you have no password. Have your tried using the password "root"?