So I'm trying to set up a connectionstring in ASP.NET to connect to a SQL Server.
I've got the servername and that's the structure I'm currently using.
<add name="CRMSQL" connectionString="Data Source=servername\Instance;Initial Catalog=crm;User ID='CRM';Password='****';Integrated Security=True" providerName="System.Data.SqlClient" />
I know that the username and the password are right and for the Servername I use something like U444324.And as the instance name I use the name which pops up when I execute:
SELECT ##servername
What are possible sources of error?
Replace Integrated Security=True with Persist Security Info=True
Persist Security = true means that the Password used for SQL authentication is not removed from the ConnectionString property of the connection.
When Integrated Security = true is used then the Persist Security is completely irelevant since it only applies to SQL authentication, not to windows/Integrated/SSPI.
Reference : Differance Between Persist Security Info And Integrated Security
Create an empty text file
Change the extension to .udl
Once created, double click on the created file.
You will be presented with a GUI
Follow the steps in Connection tab and click on Test Connection
If successfull, click OK
Then right click on the file and open with note pad
Copy the connection string and replace it with your current one.
Related
I do face a rather strange behavior at customer site:
My ASP.NET application tries to connect to a database using a connection string, specified in the web.config.
This works fine in all cases but one - this specific customer needed to switch integrated security on, due to security permissions.
Strangely, now the application tries to connect to another database and not the one defined as 'initial catalog'.
I've already double-checked the connection string for any typos.
There are no USE statements in the queries. Basically there's nothing else telling the application where to connect to but this connection string.
If relevant - it is using the EntityClient provider.
The connection string (some parts changed of course):
<add name="ConnName" connectionString="metadata=... provider connection string="data source=SERVER;initial catalog=DB;persist security info=True;Integrated Security=true;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
Problem solved - there is a View involved which hasn't been created correctly and was pointing to that other database.
I cannot get my web app to connect to the database when running the app. I can connect in the SQL Server object explorer and I took the connection string from the connections properties
Here is my connection string :
<add name="Quotes.DAL.QuotesConnection"
connectionString="Data Source=(localdb)\v11.0;Initial Catalog=TestDB;Integrated Security=False;User ID=sa;Password=***;Connect Timeout=15;Encrypt=False;TrustServerCertificate=False"
providerName="System.Data.SqlClient" />
I can connect as SA and I can create the database that it points to in Management Studio. When my app tries to connect via Entity Framework I get the following error :
System.Data.SqlClient.SqlException (0x80131904): Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject,
I'm running Windows 7 as a home dev machine so there is no Active Directory.
Can anybody explain why this might happen?
I have found that this is probably because I have Entity Framework in another assembly. I created a new web application and its connection string works. When it try the same connection string in my DAL it fails with this same error!
Thanks
It may be because of setting Integrated Security=False, I have never set it to false. I normally use just the bare minimum Server=myServerAddress;Database=myDataBase;User Id=myUsername;
Password=myPassword; when setting up my connection strings with sql authentication, only adding things as I need them.
The other issue I see is using SA to connect to the database. This breaks almost every best practice in the book and I would recommend creating an app specific password for when you roll out the program. The reason being is the GOD ACCESS account for the server will have its password in plain text in the app.config file. Just something to keep in mind.
EDIT: After some comment discussion the connection string was in the wrong config file.
I'm working on ASP.NET Web Forms application, using standard ADO.NET for quering the database. Since today I've been developing on my local machine, using local resources (including local isntance of SQL Server 2008) and I use a very simple connections string plus Windows auth to connect to my database:
<add name="MyConn" connectionString="Data Source=MY-PC\SQLEXPRESS;Initial
Catalog=MyDataBaseName;Integrated Security=true;"/>
But today I wanted to remove to a remote SQL SERVER so I changed my connection string accordingly:
<add name="MyConn" connectionString="Data Source=TheRemoteServer;
Initial Catalog=MyDataBaseName;User Id=MyId;Password=MyPassword;
Integrated Security=true;"/>
and when I try to connect to the database, when I reach :
try
{
connection.Open();
I get an error that connection can not be established for user and here come my Windows user instead the ID I've provided in the connection string. However if I set Integrated Security=false; (to False) everything starts working. I don't know why. It seems strange and since it obviously has something to do with security I'm bothered leaving it like that. So what are my options here?
Integrated Security:
When false, User ID and Password are specified in the connection. When true, the current Windows account credentials are used for authentication.
Recognized values are true, false, yes, no, and sspi (strongly recommended), which is equivalent to true.
If User ID and Password are specified and Integrated Security is set to true, the User ID and Password will be ignored and Integrated Security will be used.
SqlCredential is a more secure way to specify credentials for a connection that uses SQL Server Authentication (Integrated Security=false).
SQL Credential
Just use the following:
<add name="MyConn" connectionString="Data Source=TheRemoteServer;
Initial Catalog=MyDataBaseName;User Id=MyId;Password=MyPassword;"/>
or
<add name="MyConn" ConnectionString="Server=myServerName\myInstanceName;
Database=myDataBase;User Id=MyId;Password=myPassword;"/>
I’m having a problem with my SQL Connection strings not using the authentication provided in the connection string. I have written an ASP.NET application using self-tracking entities and I need to access data from two different servers. The first server, SQLSERVER1 is using windows authentication and is on the domain and im able to pull my data just fine. The second server connection however, is on another box off the domain and I need to use a specific login and password to access the data. I confirmed that the credentials im using in the connection string can connect to the server just fine.
On my web-server setup I have my app pool in IIS7 running under its own credential “Domain\AppPoolUser”.
For some reason, whenever I try to call data from SQLSERVER2 after publishing to the webserver im getting the following error, even though I have specified the credentials in my connection string and they are valid. The connection works fine however, if im debugging the application locally : Login failed for user 'DOMAIN\AppPoolUser'.
It seems like it’s not using the credentials I have specified in the connection string, and instead trying to connect as the application pools credentials. How can I setup the connection string to use the credentials I have provided?
Here is my connection strings:
<add name="ADATrackingContext" providerName="System.Data.SqlClient" connectionString="Server=SQLSERVER1;Database=ADATracking;Integrated Security=True;" />
<add name="PatientContext" providerName="System.Data.SqlClient" connectionString="Server=SQLSERVER2;Database=Patients;uid=PatientUser;password=123456;Integrated Security=False;" />
Not sure if it matters, but the user should be User Id= and not uid=
The ADATrackingContext connection string will attempt to login using the Domain\AppPoolUser domain account since you have set the Integrated Security = true. Since you don't have Domain\AppPoolUser as a login for your db, you will get the error you describe.
Double check to make sure you are passing the correct connection string to your DbContext.
It looks like the error was being caused beacuse I was trying to pull the data before my client page was authenticated to the ADATracking connection string. I moved the data call over to the HomeConstroller.cs instead of the Global.asax file and all is working now. My mistake.
SQL Express 2005 is running locally. I have a project written by another person running on the same machine. All I want to do is connect to it, can't be that hard right?
This is the one I use in my old classic ASP code to hit another database running on the same instance:
Provider=SQLOLEDB;Data Source=MYLAPTOP\MSSMLBIZ;Persist Security Info=True;User ID=TestUser;Password=letmein;Initial Catalog=TestDB
But trying a version of that makes the .net code throw a wobbler as he's written it using SQLServer drivers so its not liking the Provider stuff.
Here is the orginal connection string from his code:
Server=(local);Initial Catalog=TheDatabase;User Id=TheUser;Password=ThePassword;
I've been to http://www.connectionstrings.com/sql-server-2005 and tried several of the options from there, these all get "SQL Server does not exist or access denied" (what a lovely mixed error message that is!):
Data Source=localhost;Integrated Security=True;Initial Catalog=TheDatabase
Data Source=localhost\SQLEXPRESS;Integrated Security=True;Initial Catalog=TheDatabase
Data Source=MyLaptop\SQLEXPRESS;Integrated Security=True;Initial Catalog=TheDatabase
Server=MyLaptop\SQLEXPRESS;Initial Catalog=TheDatabase;User Id=TheUser;Password=ThePassword;
I've created logins for MyLaptop/IUSR_MyLaptop, MyLaptop/ASPNET, MyLaptop/IWAM_MyLaptop in SQL Express and given them all read/write permissions to my DB and set their default DB to be TheDatabase.
What the heck am I doing wrong and how can I debug the problem some more?
UPDATE: Special Thanks to Chris for all his pointers, got there in the end, if you are having similar problem please read all the comments there are lots of links and tips on how to track them down.
Can you advise exactly what is in the config?
Are you using the block - in which case a valid connection string would be:
<add name="connection" providerName="System.Data.SqlClient" connectionString="Data Source=localhost\MSSMLBIZ;Initial Catalog=TheDatabase;Integrated Security=True" />
or
<add name="connection" providerName="System.Data.SqlClient" connectionString="Data Source=localhost\MSSMLBIZ;Initial Catalog=TheDatabase;Integrated Security=False;User Id=TheUser;Password=ThePassword;Application Name=AppName;" />
Or are you getting the connection string from app settings - in which case I guess your provider is set in code inside the app itself?
With that error message in your comment you should run through the items in http://blogs.msdn.com/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx
I presume the instance is running and does allow connections over tcpip?
Shouldn't your datasource read: Data Source=localhost\sqlexpress too?
You don't mention granting rights for 'TheUser' to access the database on the server - if you're restored from another server you may had a sid mismatch.
Try running
sp_update_users_login 'report'
against the db in question.
If it returns the user account in the report try:
sp_update_users_login 'update_one', 'theuser', 'theuser'
to remap things.