I created a default ASP.NET web form web site using Visual Studio. By default it contains a .mdf database file, Registration page, Login page and some other pages. Then I host this web application on Azure as a web app.
After that I did several registrations for the web site and I need to see the data (data which i used on registration) on the hosted application.
Is there any way to connect to the database file in Azure? In Azure, I did not set up a connection string. I just publish the app and it manages the database connection itself.
There is nothing inside the "Database" section
It seems that you do not publish your asp.net to Azure with Sql Database correctly. So, you could refer to this article to check if you have deploy database correctly.
As you have published, you could go to the database on Azure portal and choose query editor(preview). Click Login and enter the username and password you have set in Azure Sql server.
Also, you could open Microsoft SQL Server Management Studio to get your database. And you also need to login into the Sql Server as above.
After logining into the sql database, you will see all the data you have insert.
BTY, make sure you have synced the data in local database to Azure Sql Database. For more details, you could refer to this article.
So i have a localdb set up for my project in Visual Studio but when I publish it to my Azure web app, I get "
An unhandled exception occurred while processing the request. Win32Exception: The system canot find the file specified TryGetConnection"
I tried adding a "DefaultConnection" Connection String with the database/server as the value in the Web App settings but that didn't do anything
LocalDb doesn't exist for Azure. LocalDb is a feature of SQL Server Express, there is no equivalency of that on the service (machine) you are deploying your App Service website on.
There are plenty of options instead of LocalDb when you go to Azure. The easiest (and recommended) is to use an Azure SQL database and replace your connectionstring with one that points to that instead when you publish your website.
Some other options are discussed here Using a LocalDb MDF file on Azure
Below is the steps i have took to publish my Website to Azure. I have two data connections the "defaultconnection" for users tables log in register etc. The other is a connection to an Azure Sql Database.
On Azure i created a new app service.
In Visual Studio i click on project and select publish.
In the publish Web window that pops up i select Microsoft Azure Web Apps.
In the following window i select the app service i created in Azure.
In the settings window it shows the two connection database connections.
They both have the same connection string which is the Azure hosted Database. I am not sure what to change the connection string to for the users table. I created a SQL database in azure and connected that to the app service then used that connection string for the "defaultconnection". The string is below
Server=tcp:userauthen.database.windows.net,1433;Data Source=userauthen.database.windows.net;Initial Catalog=USERAUTH;Persist Security Info=False;User ID={your_username};Password={your_password};MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;
I published to azure and am able to go through the pages but as soon as i try to interact with the database i get an internal server error 500.
I tried publishing the website without userlogin so i could see if it connected to the Azure sql database but i still get the internal server error 500. I am really stuck at this point and any assistance would be helpful.
So i changed the firewall settings to allow certain IP address and it worked. I can access both my databases.
Is there any way so IIS could connect to LocalDB without using the NT SERVICE\NETWORK SERVICE user account.
This account has not suitable permissions. I'm looking use some other default account or is there some way that I can use the NETWORK SERVICE account without changing permissions?
You should use Shared Instances feature of LocalDB. These two posts on Using LocalDB with Full IIS should give you more information. Especially the second part seems relevant, but the first one contains some context as well.
(note: the original links are no longer available, using archive.org instead)
Part 1: User Profile
Part 2: Instance Ownership
Original (non-working as of March 2019) links:
Part 1: User Profile
Part 2: Instance Ownership
In case the links disappear again, I am copy-pasting solutions from the article for easier access:
Post 1:
The problem we're facing is that the user profile needs to be loaded. That shouldn't be hard since each IIS Application Pool has an option called Load User Profile that can be found in Advanced Settings section. Unfortunately things got slightly more complicated in Service Pack 1 for Windows 7. As described in KB 2547655 enabling loadUserProfile is not enough to fully load user profile, we also need to enable setProfileEnvironment. This requires editing applicationHost.config file which is usually located in C:\Windows\System32\inetsrv\config. Following the instructions from KB 2547655 we should enable both flags for Application Pool ASP.NET v4.0, like this:
<add name="ASP.NET v4.0" autoStart="true" managedRuntimeVersion="v4.0" managedPipelineMode="Integrated">
<processModel identityType="ApplicationPoolIdentity" loadUserProfile="true" setProfileEnvironment="true" />
</add>
Having completed that we restart the Application Pool to make sure the new settings are applied and run our Web Application again.
Note from my side: Just find "applicationPools" tag in that applicationHost file and update those two variables to true, so it looks like this:
<processModel identityType="ApplicationPoolIdentity" loadUserProfile="true" setProfileEnvironment="true" />
That's it, save the file and restart IIS pool.
Post 2:
The Problem of the Private Instance
As we can see we are facing the following error:
System.Data.SqlClient.SqlException: Cannot open database "OldFashionedDB" requested by the login. The login failed.
Login failed for user 'IIS APPPOOL\ASP.NET v4.0'.
This time the error is quite clear. LocalDB was started and the Web Application was able to connect to it, but the connection was then terminated due to login failure. The ApplicationPoolIdentity account for the IIS application pool (in this case IIS APPPOOL\ASP.NET v4.0) couldn't login to LocalDB instance because the database specified in the connection string (OldFashionedDB) wasn't found. How odd, since connecting from Visual Studio with the same connection string succeeds!
How is it possible that Visual Studio connects to LocalDB just fine, while the connection from Web Application fails? In both cases the connection string is the following:
Data Source=(localdb)\v11.0;Initial Catalog=OldFashionedDB;Integrated Security=True
The answer is that there are two different LocalDB instances here. Unlike SQL Server Express instances, which are running as Windows services, LocalDB instances are running as user processes. When different Windows users are connecting to LocalDB, they will end up with different LocalDB processes started for each of them. When we connect to (localdb)\v11.0 from Visual Studio, a LocalDB instance is started for us and runs as our Windows account. But when Web Application, running in IIS as ApplicationPoolIdentity, is connecting to LocalDB, another LocalDB instance is started for it and is running as ApplicationPoolIdentity! In effect, even though both Visual Studio and Web Application are using the same LocalDB connection string, they are connecting to different LocalDB instances. Obviously the database created from Visual Studio on our LocalDB instance will not be available in Web Application's LocalDB instance.
A good analogy to this is My Documents folder in Windows. Say we open Visual Studio and create a file in our My Documents folder. Then we login to the same machine as a different user and go to My Documents folder again. We won't find the file there as My Documents of the second user and our My Documents are two different folders. Similarly LocalDB instances (localdb)\v11.0 owned by two different users are two different processes with two different sets of databases.
This is also the reason the Web Application was able to connect to LocalDB from IIS Express. Just like LocalDB, IIS Express is a user process. It is started by Visual Studio and runs as the same Windows account as the Visual Studio process. Two different processes running as the same Windows account (Visual Studio and IIS Express, both running as our Windows account) connecting to (localdb)\v11.0 are connecting to the same LocalDB process, also started as the same Windows account.
Possible Solutions
Understanding the nature of the problem brings multiple approaches to solving it. As different approaches have different tradeoffs, instead of prescribing one solution, below I presented three approaches that seem most viable to me. My hope is to hear from you about the one that worked best for you! Here is the list:
Approach 1: Run IIS as our Windows user
Approach 2: Use LocalDB Shared Instance
Approach 3: Use full SQL Server Express
Let's take a closer look at each of them.
Approach 1: Run IIS as our Windows user
If different user accounts are the problem, why not try to run our Web Application under our Windows account? Web Application would connect to the same LocalDB as Visual Studio and everything should just work.
Making the configuration change is relatively easy, just start IIS Manager and find the right Application Pool:
Open Advanced Settings screen (available in the context menu):
Click the little button in the Identity property to bring up the Application Pool Identity screen:
Starting the Web Application again will confirm that the problem is solved:
What are the drawbacks of this approach? Of course running Web Application under our account brings certain security risks. If someone hijacks our Web Application they will be able to access all system resources our account can. Running the Web Application as ApplicationPoolIdentity provides additional protection since ApplicationPoolIdentity accounts have very limited access to local system resources. Therefore I cannot recommend this approach in general, but when used with care it is a viable option in some cases.
Approach 2: Use LocalDB Shared Instance
We could also use an instance sharing feature of LocalDB. It allows us to share a LocalDB instance with other users on the same machine. The shared instance will be accessible under a public name.
The easiest way of sharing an instance is to use SqlLocalDB.exe utility. Just start an administrative command line prompt, and type the following command:
sqllocaldb share v11.0 IIS_DB
It will share the private LocalDB instance v11.0 under the public name IIS_DB. All users on the machine will be able to connect to this instance, using (localdb).\IIS_DB as a server address. Note the . before the instance name, indicating this is a shared instance name. We should replace the connection string in our Web Application with an updated one:
Data Source=(localdb)\.\IIS_DB;Initial Catalog=OldFashionedDB;Integrated Security=True
Before the shared instance can be used by the Web Application we need to start it and create logins for the ApplicationPoolIdentity. Starting the instance is easy, simply connecting to it from SQL Server Object Explorer will start it and keep it alive. Once we are in the SQL Server Object Explorer we can also create the login for ApplicationPoolIdentity. We could use the following query:
create login [IIS APPPOOL\ASP.NET v4.0] from windows;
exec sp_addsrvrolemember N'IIS APPPOOL\ASP.NET v4.0', sysadmin
This script gives full administrative access to our LocalDB instance to the ApplicationPoolIdentity account. Whenever possible, I would recommend using more limited, database-level or even table-level permissions.
Now we can run our Web Application again. This time it should work just fine:
What are the drawbacks of this approach? The main one is that, before Web Application can connect to the shared instance, we need to make sure the instance is started. For that to happen the Windows account that owns the instance must connect to it and the connection must be kept open, or the LocalDB instance will shut down.
Approach 3: Use full SQL Server Express
Since full IIS runs as a service, maybe using traditional, service-based SQL Server Express is the right approach? We could just install SQL Server 2012 Express RC0 and create the OldFashionedDB database in it. We can even use our brand new SQL Server Data Tools to do it, as it works with any SQL Server version and edition. Our connection string would have to change to:
Data Source=.\SQLEXPRESS;Initial Catalog=OldFashionedDB;Integrated Security=True
Of course, just as in the previous case, we would need to make sure the ApplicationPoolIdentity account has access to our SQL Server Express instance. We can use the same script as previously:
create login [IIS APPPOOL\ASP.NET v4.0] from windows;
exec sp_addsrvrolemember N'IIS APPPOOL\ASP.NET v4.0', sysadmin
After that, running our Web Application brings the happy picture again:
What are the drawbacks of this approach? Obviously we lose the benefits of using LocalDB. Installing SQL Server Express may take more time than LocalDB, and there may be some machine cleanup necessary for it to succeed. SQL Server Express Setup can be blocked by problems like corrupt WMI database, polluted registry or components left by SQL Server or Visual Studio CTPs and Betas. And SQL Server Express will continue running in the background even when not needed, as services do.
Other options
There are other approaches of using LocalDB under full IIS that are not covered here. We could embrace the Web Application's private LocalDB instance and communicate with it through the Web Application by executing T-SQL scripts from ASP.NET code. We could also use AttachDbFileName option of ADO.NET connection strings and use a database file (.mdf) that would be attached to both our LocalDB during development and Web Application's LocalDB for debugging. I tried both I found them too cumbersome to discuss further.
Based on the answer from #KrzysztofKozielczyk.
I originally posted an answer here:
https://stackoverflow.com/a/62810876/3850405
After following this I verified that Load User Profile was set to true for my Application Pool and then set setProfileEnvironment to true in applicationHost.config. I did the last part by editing applicationHost.config located at:
C:\Windows\System32\inetsrv\config\applicationHost.config
I have written an asp.net mvc application that is connected to a Microsoft SQL Server Management Studio database and I want to deploy the application to the webhosting server now. I have managed to get the published code onto the server easily. However, I want to ftp the database I created in Microsoft SQL Server Management Studio to the server. Where are these created databases saved and is it possible to ftp the database to the server. The other issue is the web hosting server is using MS SQL Server Express is that a problem?
Normally shared hosts expect you to place the database in the App_Data folder and use it directly from there.
Here is a page to explain connecting to the database
http://msdn.microsoft.com/en-us/library/ms247257.aspx
To find the database on your system open sql management studio right click the Database and click Properties on the Properties windows click on the Files section to show all associated files with your database.
I would recommend checking your providers documentaion though they might have specific requirments for database deployments