Connection strings

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I would like to know the recommended approach to getting a connection string from a config file for my xUnit.

I have set up a test project using the new Visual Studio xUnit Test project template for. This project will run my integration tests that reference 2 different. I understand that normally the connection string should not be set or accessed in a class library project - it should be the application that consumes the class library that should set the connection string.

However, in this case it appears that the xUnit test project is treated somewhat like a class library project. I have not seen any examples of how to set up some sort of config file and access that from the test project. How do I access the connection string from a config file so that my test project can consume my Datalayer class library project and pass in the appropriate connection string?

I was able to access the connection string from my xUnit test project by creating a DbOptionsFactory class that returns a DbContextOptions object initialized with a connection string that it reads from an appsettings. When instantiating my DbContext I pass in the optionsBuilder object that has the connection string from the configuration file like so:.

Connection Strings

Learn more. Asked 3 years ago. Active 3 years ago. Viewed 3k times. Pacificoder Pacificoder 2 2 gold badges 11 11 silver badges 23 23 bronze badges. Do you excpliticly need a connection string in your tests or something like TestServer msdn. Active Oldest Votes. This requires a dependency on Microsoft. AddJsonFile "appsettings. UseSqlServer connectionString. I had to install the Microsoft.

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Is there a common account in SQL Server that come with default account that can connect? I have heard about sa account in SQL Server, what is sa? Refer to doc. Actually you can use the SqlConnectionStringBuilder class to build your connection string. To build the connection stringyou need to instantiate an object from that SqlConnectionStringBuilder and set their properties with the parameters you use to connect to the DataBase.

Then you can get the connection string from the ConnectionString property from the SqlConnectionStringBuilder object, as is shown in this example:. You can add more parameters to build your connection string. Remember that the parameters are defined by the values setted in the SqlConnectionStringBuilder object properties.

Also you can get the database connection string from the conection of Microsoft Visual Studio with the attached DB. When you select the DB, in the properties panel is shown the connection string. In this page you can see how the password varies. Like in this image:. You need to understand that a database server or DBA would not want just anyone to be able to connect or modify the contents of the server. This is the whole purpose of security accounts. That "sa" thing you have heard of, does not work with SQL Serveror Not sure about previous versions though.

FYI, database security and roles are much more complicated now-a-days. You may want to look into the details of Windows-based authentication. All you need to change is the server machine name and the same connection string will work with both your machines, given both have same db name of course.

You can use either Windows authentification, if your server is in Domain, or Sql authentification. But it is a bad practice to use if for conneting of your clients.

You should create your own accounts, and use them to connect to your SQL. In each connection you set account loginits password and the default databaseyou want to connect. As you know might already know, you can use two ways to log in to SQL Server. Therefore there are connection strings which suitable for each scenario such as windows authentication, localdb etc.

These are XML tags. You just need value of connectionString. Learn more. How to set SQL Server connection string? Ask Question. Asked 7 years ago. Active 1 month ago. Viewed k times. Roshan Roshan 2, 4 4 gold badges 25 25 silver badges 47 47 bronze badges. You never want to use a default account username and password to set up access to SQL Server or any connection type for that matter.

That would avoid having to use userids and passwords altogether.For a list of drivers and links to driver documentation, see drivers. For a standalone that enforces access control :. For a replica set, specify the hostname s of the mongod instance s as listed in the replica set configuration. For a replica set, include the replicaSet option. For a replica set that enforces access controlinclude user credentials:.

For a connection string to a sharded cluster, specify mongos hosts in the connection string. For a sharded cluster that enforces access controlinclude user credentials:. For more examples, see Examples. If specified, the client will attempt to authenticate the user to the authSource. If authSource is unspecified, the client will attempt to authenticate the user to the defaultauthdb.

connection strings

And if the defaultauthdb is unspecified, to the admin database. See also authSource. The host and optional port number where the mongod instance or mongos instance for a sharded cluster is running. Specify as many hosts as appropriate for your deployment topology:. If the port number is not specified, the default port is used. The authentication database to use if the connection string includes username:password authentication credentials but the authSource option is unspecified. If both authSource and defaultauthdb are unspecified, the client will attempt to authenticate the specified user to the admin database.

See Connection String Options for a full description of these options. Using DNS to construct the available servers list allows more flexibility of deployment and the ability to change the servers in rotation without reconfiguring clients. The driver or mongo shell will then query the DNS for the record to determine which hosts are running the mongod instances.

The hostnames returned in SRV records must share the same parent domain in this example, example. If the parent domains and hostname do not match, you will not be able to connect. Like the standard connection string, the DNS seedlist connection string supports specifying options as a query string. You may only specify one TXT record per mongod instance.

The TXT record for the server. You can override the options specified in a TXT record by passing the option in the query string. In the following example, the query string has provided an override for the authSource option configured in the TXT record of the DNS entry above.

Given the override for the authSourcethe equivalent connection string in the standard format would be:. Separate options with the ampersand i. In the following example, a connection includes the replicaSet and connectTimeoutMS options:. To provide backwards compatibility, drivers currently accept semi-colons i. The following connection string to a replica set named myRepl with members running on the specified hosts:. Specifies the name of the replica setif the mongod is a member of a replica set.

When connecting to a replica set, provide a seed list of the replica set member s to the host[:port] component of the uri.These Providers requires a connection string to connect to the database. The way the connection string is specified has changed from the previous version of the entity framework.

connection strings

You can read it Database connection string in Entity Framework. There are several ways by which you can provide the connection string to EF Core application. We look at some of them in detail. The connection strings were stored in web. NET Applications. The newer ASP. You can store connection string anywhere you wish to. For this example, we will use the appsettings. The appsetting.

For example, appsettings. The configuration is stored in name-value pairs. These name-value pairs into a structured hierarchy of sections. Hence each connection string is stored as a separate node under the section ConnectionStrings as shown below. You can name whatever you want it to be. You can create DBContext and configure it by passing the connection string in several ways depending on the type of application like ASP.

SqlDataReader in Part 8

Hence we also need to read the Connection String in startup class. To Read the from the configuration, we need an instance of IConfiguration object. The IConfiguration is available to be injected via Dependency injection.

Or by using the GetConnectionString method as shown below. Next, we need to register the EFContext for Dependency injection.

connection strings

This done in the ConfigureServices method of the startup class. The AddDBContext extension method provided by entity framework core is used to register our Context class.

Finally, you can use the DBContext by injecting it in the constructor of the Controller or services etc as shown below. The ASP. But in the case of. NET Core console Application, we need to set it up ourselves. You can refer to the article how to setup dependency injection in. NET Core console application. The appsettings. Hence you need to create it first.The specific connection string syntax for each provider is documented in its ConnectionString property.

The following table lists the four data providers that are included in the.

Connection String Syntax

NET Framework. NET 2. NET Framework data providers. The connection string builders allow you to construct syntactically valid connection strings at run time, so you do not have to manually concatenate connection string values in your code. For more information, see Connection String Builders. We recommend using Windows Authentication sometimes referred to as integrated security to connect to data sources that support it.

The syntax employed in the connection string varies by provider. The following table shows the Windows Authentication syntax used with the. The syntax for a SqlConnection connection string is documented in the SqlConnection. ConnectionString property.

If you need to connect to an earlier version of SQL Server, you must use the. Most connection string keywords also map to properties in the SqlConnectionStringBuilder. The default setting for the Persist Security Info keyword is false.

Setting it to true or yes allows security-sensitive information, including the user ID and password, to be obtained from the connection after the connection has been opened. Keep Persist Security Info set to false to ensure that an untrusted source does not have access to sensitive connection string information. Each of the following forms of syntax uses Windows Authentication to connect to the AdventureWorks database on a local server.

However, if SQL Server Authentication is required, use the following syntax to specify a user name and password. In this example, asterisks are used to represent a valid user name and password. Windows authentication takes precedence over SQL Server logins.A connection string includes the authorization information required for your application to access data in an Azure Storage account at runtime using Shared Key authorization.

You can configure connection strings to:. Your storage account access keys are similar to a root password for your storage account. Always be careful to protect your access keys. Use Azure Key Vault to manage and rotate your keys securely. Avoid distributing access keys to other users, hard-coding them, or saving them anywhere in plain text that is accessible to others.

Rotate your keys if you believe they may have been compromised. Azure AD provides superior security and ease of use over Shared Key. Under Settingsselect Access keys. Your account access keys appear, as well as the complete connection string for each key. Find the Key value under key1and click the Copy button to copy the account key.

Alternately, you can copy the entire connection string. Find the Connection string value under key1and click the Copy button to copy the connection string. You can use either key to access Azure Storage, but in general it's a good practice to use the first key, and reserve the use of the second key for when you are rotating keys.

To view or read an account's access keys, the user must either be a Service Administrator, or must be assigned an RBAC role that includes the Microsoft.

Your application needs to access the connection string at runtime to authorize requests made to Azure Storage. You have several options for storing your connection string:. Storing your connection string in a configuration file makes it easy to update the connection string to switch between the storage emulator and an Azure storage account in the cloud. You only need to edit the connection string to point to your target environment. You can use the Microsoft Azure Configuration Manager to access your connection string at runtime regardless of where your application is running.

The storage emulator supports a single fixed account and a well-known authentication key for Shared Key authentication. This account and key are the only Shared Key credentials permitted for use with the storage emulator. They are:. The authentication key supported by the storage emulator is intended only for testing the functionality of your client authentication code.

It does not serve any security purpose. You cannot use your production storage account and key with the storage emulator. You should not use the development account with production data.If your SQL Server listens on a non-default port you can specify that using the servername,xxxx syntax note the comma, it's not a colon.

The default SQL Server port is and there is no need to specify that in the connection string. A Windows CE device is most often not authenticated and logged in to a domain but it is possible to use SSPI or trusted connection and authentication from a CE device using this connection string.

At the end of the Data Source is the port to use. Read more here. Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection. The first connection to LocalDB will create and start the instance, this takes some time and might cause a connection timeout failure.

If this happens, wait a bit and connect again.

Database Connection String in Entity Framework Core

To create a named instance, use the SqlLocalDB. Example SqlLocalDB. NET framework versions before 4. However the named pipes connection will work to connect pre 4. Executing SqlLocalDB. Use SqlLocalDB. For example execute SqlLocalDB.

connection strings

If you connect with ADO. NET or the SQL Native Client to a database that is being mirrored, your application can take advantage of the drivers ability to automatically redirect connections when a database mirroring failover occurs.

You must specify the initial principal server and database in the connection string and the failover partner server. There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality.

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