I am going to insert the employee details on three databases one by one. So, I like to get connecting values from text file. Whenever I want to change the connection, I just want to enter the login details in the text file.
Use an app. Allows you to configure multiple named connection strings which you can access via the System. ConfigurationManager class' ConnectionStrings property. There is a special configuration file you can use and a set of classes to make your life easier.
This is not needed but it will make your life easier. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How can I get a connection string from a text file? To create such a connection string, you can do the following: On the computer that requires the connection string, create a new file with a file extension of.
To perform this task, you will have to be viewing file extensions. Create a new text file and then rename the three letter file extension. For example, if you create a file named ConnectionString. The rest of these steps will assume that the file is actually named ConnectionString. If you created another file name with a.
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Reduce Errors Now no credit card required. The ultimate guide to connection strings in web. Would your users appreciate fewer errors? Previous post. The providerName is the invariant name of the. NET Framework data provider, which is registered in the machine. You can save part of a connection string in a configuration file and use the DbConnectionStringBuilder class to complete it at run time.
This is useful in scenarios where you do not know elements of the connection string ahead of time, or when you do not want to save sensitive information in a configuration file. For more information, see Connection String Builders.
External configuration files are separate files that contain a fragment of a configuration file consisting of a single section. The external configuration file is then referenced by the main configuration file. Storing the connectionStrings section in a physically separate file is useful in situations where connection strings may be edited after the application is deployed. For example, the standard ASP. NET behavior is to restart an application domain when configuration files are modified, which results in state information being lost.
However, modifying an external configuration file does not cause an application restart. External configuration files are not limited to ASP. NET; they can also be used by Windows applications. In addition, file access security and permissions can be used to restrict access to external configuration files. Working with external configuration files at run time is transparent, and requires no special coding.
To store connection strings in an external configuration file, create a separate file that contains only the connectionStrings section. Do not include any additional elements, sections, or attributes.
This example shows the syntax for an external configuration file. In the main application configuration file, you use the configSource attribute to specify the fully qualified name and location of the external file. This example refers to an external configuration file named connections.
NET Framework 2. Configuration namespace to simplify retrieving connection strings from configuration files at run time. You can programmatically retrieve a connection string by name or by provider name. The machine. When retrieving connection strings by provider name from the app. Adding clear immediately after the connectionStrings element removes all inherited references from the data structure in memory, so that only the connection strings defined in the local app.
Starting with the. NET configuration files. It is designed to work with configuration files on a Web server, and allows programmatic access to configuration file sections such as system.
Accessing configuration files at run time requires granting permissions to the caller; the required permissions depend on the type of application, configuration file, and location.
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