Membership, MembershipProvider and MembershipUser relations in catchsomeair.us? - Stack Overflow
Owner Relations - 24/7 web access to your ownership details. Access your owner or partner statements for a specific oil and gas operator. While it's not crystal clear on MSDN, it's not all that complicated. There's a trio of classes: Membership: provides utility methods and a point of entry -- basically a. Create and configure a custom database connection using the Auth0 dashboard. database anytime a user tries to log in, is created, changes their password, verifies catchsomeair.us Membership Provider; MongoDB; MySQL; Oracle; PostgreSQL.
In this tutorial you'll read and display related data — that is, data that the Entity Framework loads into navigation properties. The following illustrations show the pages that you'll work with. Lazy, Eager, and Explicit Loading of Related Data There are several ways that the Entity Framework can load related data into the navigation properties of an entity: When the entity is first read, related data isn't retrieved.
However, the first time you attempt to access a navigation property, the data required for that navigation property is automatically retrieved. This results in multiple queries sent to the database — one for the entity itself and one each time that related data for the entity must be retrieved.
When the entity is read, related data is retrieved along with it. This typically results in a single join query that retrieves all of the data that's needed.
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- Step 1: Creating the Guestbook Application's Data Model
- Create a Courses Index Page That Displays Department Name
You specify eager loading by using the Include method. This is similar to lazy loading, except that you explicitly retrieve the related data in code; it doesn't happen automatically when you access a navigation property. You load related data manually by getting the object state manager entry for an entity and calling the Collection. Load method for collections or the Reference. Load method for properties that hold a single entity.
Because they don't immediately retrieve the property values, lazy loading and explicit loading are also both known as deferred loading. In general, if you know you need related data for every entity retrieved, eager loading offers the best performance, because a single query sent to the database is typically more efficient than separate queries for each entity retrieved.
For example, in the above examples, suppose that each department has ten related courses.
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The eager loading example would result in just a single join query and a single round trip to the database. The lazy loading and explicit loading examples would both result in eleven queries and eleven round trips to the database. The extra round trips to the database are especially detrimental to performance when latency is high.
On the other hand, in some scenarios lazy loading is more efficient. Eager loading might cause a very complex join to be generated, which SQL Server can't process efficiently.
Creating the Membership Schema in SQL Server (C#)
Or if you need to access an entity's navigation properties only for a subset of a set of entities you're processing, lazy loading might perform better because eager loading would retrieve more data than you need. If performance is critical, it's best to test performance both ways in order to make the best choice. Typically you'd use explicit loading only when you've turned lazy loading off. One scenario when you should turn lazy loading off is during serialization.
Lazy loading and serialization don't mix well, and if you aren't careful you can end up querying significantly more data than you intended when lazy loading is enabled. However, this example shows how to use eager loading for navigation properties within entities that are themselves in navigation properties.
When the user selects a course, related data from the Enrollments entity set is displayed. The Course and Enrollment entities are in a one-to-many relationship. You'll add explicit loading for Enrollment entities and their related Student entities.
Explicit loading isn't necessary because lazy loading is enabled, but this shows how to do explicit loading. Therefore, you'll create a view model that includes three properties, each holding the data for one of the tables.
ViewModels; The scaffolded code in the Index method specifies eager loading only for the OfficeAssignment navigation property: OfficeAssignment ; return View instructors. LastName ; if id! The parameters are provided by the Select hyperlinks on the page. The code begins by creating an instance of the view model and putting in it the list of instructors.
The code specifies eager loading for the Instructor. OfficeAssignment and the Instructor. LastName ; The second Include method loads Courses, and for each Course that is loaded it does eager loading for the Course. Department As mentioned previously, eager loading is not required but is done to improve performance. Since the view always requires the OfficeAssignment entity, it's more efficient to fetch that in the same query.
Course entities are required when an instructor is selected in the web page, so eager loading is better than lazy loading only if the page is displayed more often with a course selected than without. If an instructor ID was selected, the selected instructor is retrieved from the list of instructors in the view model. The view model's Courses property is then loaded with the Course entities from that instructor's Courses navigation property. The Single method converts the collection into a single Instructor entity, which gives you access to that entity's Courses property.
You use the Single method on a collection when you know the collection will have only one item. The Single method throws an exception if the collection passed to it is empty or if there's more than one item. An alternative is SingleOrDefaultwhich returns a default value null in this case if the collection is empty.
However, in this case that would still result in an exception from trying to find a Courses property on a null referenceand the exception message would less clearly indicate the cause of the problem. When you call the Single method, you can also pass in the Where condition instead of calling the Where method separately: Single Next, if a course was selected, the selected course is retrieved from the list of courses in the view model. Then the view model's Enrollments property is loaded with the Enrollment entities from that course's Enrollments navigation property.
Changed the model class to InstructorIndexData. Changed the page title from Index to Instructors. Added an Office column that displays item. Location only if item.
Reading Related Data with the Entity Framework in an catchsomeair.us MVC Application | Microsoft Docs
OfficeAssignment is not null. Because this is a one-to-zero-or-one relationship, there might not be a related OfficeAssignment entity. This sets a background color for the selected row using a Bootstrap class. Run the application and select the Instructors tab. The page displays the Location property of related OfficeAssignment entities and an empty table cell when there's no related OfficeAssignment entity. This code displays a list of courses related to an instructor when an instructor is selected.
It also provides a Select hyperlink that sends the ID of the selected course to the Index action method. Run the page and select an instructor. Now you see a grid that displays courses assigned to the selected instructor, and for each course you see the name of the assigned department.
NET application which provider the Membership framework should use. Introduction The previous two tutorials examined using forms authentication to identify website visitors.
The forms authentication framework makes it easy for developers to log a user into a website and to remember them across page visits through the use of authentication tickets. The FormsAuthentication class includes methods for generating the ticket and adding it to the visitor's cookies. The FormsAuthenticationModule examines all incoming requests and, for those with a valid authentication ticket, creates and associates a GenericPrincipal and a FormsIdentity object with the current request.
Forms authentication is merely a mechanism for granting an authentication ticket to a visitor when logging in and, on subsequent requests, parsing that ticket to determine the user's identity. For a web application to support user accounts, we still need to implement a user store and add functionality to validate credentials, register new users, and the myriad of other user account-related tasks.
The Membership framework is a set of classes in the. NET Framework that provide a programmatic interface for accomplishing core user account-related tasks. This framework is built atop the provider modelwhich allows developers to plug a customized implementation into a standardized API.
NET Support tutorial, the. NET Framework ships with two built-in Membership providers: In order to use this provider in an application, we need to tell the provider what database to use as the store. As you might imagine, the SqlMembershipProvider expects the user store database to have certain database tables, views, and stored procedures.
We need to add this expected schema to the selected database. This tutorial starts by examining techniques for adding the necessary schema to the database in order to use the SqlMembershipProvider. NET application's data is commonly stored in a number of tables in a database. When implementing the SqlMembershipProvider database schema we must decide whether to place the Membership schema in the same database as the application data or in an alternate database.
I recommend locating the Membership schema in the same database as the application data for the following reasons: