How to configure asp net

By Tojazshura | 23.01.2021

how to configure asp net

App startup in ASP.NET Core

public class TestModel: PageModel { // requires using usloveescort.comuration; private readonly IConfiguration Configuration; public TestModel(IConfiguration configuration) { Configuration = configuration; } public ContentResult OnGet() { var myKeyValue = Configuration["MyKey"]; var title = Configuration["Position:Title"]; var name = Configuration["Position:Name"]; var defaultLogLevel = Configuration["Logging:LogLevel:Default"]; return Content($"MyKey value: . The element specifies the root element for the configuration section and contains configuration elements that configure Web applications and control how the applications behave. It holds most of the configuration elements needed to be adjusted in common applications. The basic syntax for the element is as given.

The behavior of an ASP. NET application is affected by different settings in the configuration files:. The machine. The machine settings are controlled by the system administrator and applications are generally not given access to this file. An application however, can override the default values by creating web. The web. If the application contains child directories, it can define a web. Scope of each configuration file is determined in a hierarchical top-down manner.

Any web. Visual Studio generates a default web. An application can execute without a web. The following figure shows the Solution Explorer for the sample example used in the web services tutorial:. In this application, there are two web. Information inside this element is grouped into two main areas: the configuration section-handler declaration area, and the configuration section settings area. Each configuration handler specifies name of a configuration section, contained within the file, which provides some configuration data.

It has the following basic syntax:. Section - It defines an association between a configuration section handler and a configuration element. Section group - It defines an association between a configuration section handler and a configuration section. The how to use green screen settings allow storing application-wide name-value pairs for read-only access.

For example, you can define a custom application setting as:. The connection strings show which database connection strings are available to the website. For example:. The system. NET Web applications and control how the applications behave. It holds most of the configuration elements needed to be adjusted in common applications. The basic syntax for the element is as given:. The following table provides brief description of some of common sub elements of the system. It also allows configuring a validation key that performs message authentication checks on view-state data and forms authentication tickets.

The basic syntax is:. NET - Configuration Advertisements. Previous Page. Next Page. Previous Page Print Page. Dashboard Logout.

Application Settings

To install an IIS web server and configure it for web applications, follow the steps listed. Step 1: Install IIS and Modules. Step 2: Configure Settings. Step 3: Configure Data Source Settings. Step 4: Configure Application Security. For planning information to review before. In an application, configure Web API by calling usloveescort.comure in the Application_Start method. The Configure method takes a delegate with a single parameter of type HttpConfiguration. Perform all of your configuration inside the delegate. Here is an example using an anonymous delegate. To host the application you need to publish it and use that publish folder as site folder path in iis. 1)open visual studio, select your project. 2)right-click on your project and choose publish: 3)in publish target select folder and create a new folder in c or another drive .

By Rick Anderson and Kirk Larkin. Configuration in ASP. NET Core is performed using one or more configuration providers.

Configuration providers read configuration data from key-value pairs using a variety of configuration sources:. This topic provides information on configuration in ASP. NET Core. For information on using configuration in console apps, see. NET Configuration. View or download sample code how to download. CreateDefaultBuilder provides default configuration for the app in the following order:.

Configuration providers that are added later override previous key settings. For example, if MyKey is set in both appsettings. Using the default configuration providers, the Command-line configuration provider overrides all other providers.

For more information on CreateDefaultBuilder , see Default builder settings. The following code from the sample download displays several of the preceding configurations settings:.

The default JsonConfigurationProvider loads configuration in the following order:. For example, by default:. If a configuration value must be guaranteed, see GetValue. The preferred way to read related configuration values is using the options pattern. For example, to read the following configuration values:.

In the preceding code, by default, changes to the JSON configuration file after the app has started are read. The following code shows how to use ConfigurationBinder. An alternative approach when using the options pattern is to bind the Position section and add it to the dependency injection service container. In the following code, PositionOptions is added to the service container with Configure and bound to configuration:.

In the preceding code, changes to the JSON configuration file after the app has started are not read. To read changes after the app has started, use IOptionsSnapshot.

Using the default configuration, the appsettings. Changes made to the appsettings. Consider the following ConfigureServices method, which registers services and configures options:. Related groups of registrations can be moved to an extension method to register services. For example, the configuration services are added to the following class:. The remaining services are registered in a similar class. The following ConfigureServices method uses the new extension methods to register the services:.

Note: Each services. We recommended that apps follow this naming convention. Place extension methods in the Microsoft. DependencyInjection namespace to encapsulate groups of service registrations. By default , the user secrets configuration source is registered after the JSON configuration sources. Therefore, user secrets keys take precedence over keys in appsettings. NET Core apps. Using the default configuration, the EnvironmentVariablesConfigurationProvider loads configuration from environment variable key-value pairs after reading appsettings.

Therefore, key values read from the environment override values read from appsettings. The : separator doesn't work with environment variable hierarchical keys on all platforms. The following setx commands can be used to set the environment keys and values on Windows. Unlike set , setx settings are persisted. To test that the preceding commands override appsettings. Call AddEnvironmentVariables with a string to specify a prefix for environment variables:. NET Core for host and app configuration , but not for user configuration.

For more information on host and app configuration, see. NET Generic Host. Azure App Service application settings are:. See Connection string prefixes for information on Azure database connection strings. Environment variable names reflect the structure of an appsettings. Each element in the hierarchy is separated by a double underscore preferable or a colon. When the element structure includes an array, the array index should be treated as an additional element name in this path.

Consider the following appsettings. Environment variables set in launchSettings. For example, the ASP. NET Core web templates generate a launchSettings. On Linux, the value of URL environment variables must be escaped so systemd can parse it. Use the linux tool systemd-escape which yields httplocalhost The following code displays the environment variables and values on application startup, which can be helpful when debugging environment settings:.

Using the default configuration, the CommandLineConfigurationProvider loads configuration from command-line argument key-value pairs after the following configuration sources:. By default , configuration values set on the command-line override configuration values set with all the other configuration providers.

Switch mappings allow key name replacement logic. Provide a dictionary of switch replacements to the AddCommandLine method. When the switch mappings dictionary is used, the dictionary is checked for a key that matches the key provided by a command-line argument. If the command-line key is found in the dictionary, the dictionary value is passed back to set the key-value pair into the app's configuration.

A switch mapping is required for any command-line key prefixed with a single dash -. For apps that use switch mappings, the call to CreateDefaultBuilder shouldn't pass arguments. The CreateDefaultBuilder method's AddCommandLine call doesn't include mapped switches, and there's no way to pass the switch-mapping dictionary to CreateDefaultBuilder. The solution isn't to pass the arguments to CreateDefaultBuilder but instead to allow the ConfigurationBuilder method's AddCommandLine method to process both the arguments and the switch-mapping dictionary.

The Configuration API reads hierarchical configuration data by flattening the hierarchical data with the use of a delimiter in the configuration keys. The sample download contains the following appsettings. The following code from the sample download displays several of the configurations settings:. The preferred way to read hierarchical configuration data is using the options pattern. For more information, see Bind hierarchical configuration data in this document.

GetSection and GetChildren methods are available to isolate sections and children of a section in the configuration data. Configuration sources are read in the order that their configuration providers are specified. Order configuration providers in code to suit the priorities for the underlying configuration sources that the app requires. A common practice is to add the Command-line configuration provider last in a series of providers to allow command-line arguments to override configuration set by the other providers.

The preceding sequence of providers is used in the default configuration. The Configuration API has special processing rules for four connection string environment variables. These connection strings are involved in configuring Azure connection strings for the app environment. Environment variables with the prefixes shown in the table are loaded into the app with the default configuration or when no prefix is supplied to AddEnvironmentVariables.

When an environment variable is discovered and loaded into configuration with any of the four prefixes shown in the table:. FileConfigurationProvider is the base class for loading configuration from the file system. The following configuration providers derive from FileConfigurationProvider :. The following code clears all the configuration providers and adds several configuration providers:. In the preceding code, settings in the MyIniConfig. The sample download contains the following MyIniConfig.

You typically don't want a custom JSON file overriding values set in the Environment variables configuration provider and the Command-line configuration provider. In the preceding code, settings in the MyConfig. The sample download contains the following MyConfig. Repeating elements that use the same element name work if the name attribute is used to distinguish the elements:.

The key is the file name. The value contains the file's contents. The Key-per-file configuration provider is used in Docker hosting scenarios. To activate key-per-file configuration, call the AddKeyPerFile extension method on an instance of ConfigurationBuilder.

1 thoughts on “How to configure asp net

  1. Arashir

    Good to see you again. i am using VS Code for Angular and Eclipse for spring boot. time to switch to Intellij


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