Changes are only persisted when SaveChanges() is called. Learn how the Entity Framework provides this functionality in a different way. One of these features is lazy loading of collections, and I set out to implement it… or, any way, something that I could use instead of it!. Lazy Loading Related Data In Entity Framework Core Lazy loading of data is a pattern whereby the retrieval of data from the database is deferred until it is actually needed. ng-defer-load is an Angular directive to load elements lazily. For Entity Framework users, new() and DbSet. Lazy loading Related entities are automatically loaded from the data source when you access a navigation property. 1 is a minor release that builds over the foundational 2. Hypothesis: lazy load will help speed up the initial bootstrap time and quicken the user experience. There are two ways to use the Load, Reference and Collection methods. There is a newer prerelease version of this package available. The term "lazy-loading" is majorly being used by. 0 and proxies. Lazy loading sounds good, but it can slow down performance because there are more round trips to the database, and lazy loading can cause select N+1 issues if youӲe not careful. Eagerly Loading. 0 this is possible, but can not do in the XRM the new SDK. And EF Core 2. In case you are not aware of "lazy loading" , please first read this entity framework interview question "What is lazy loading in entity framework ?"Below is a great ADO. This concept is one of the most important concepts related to the database hits in an application that can affect the performance of the application due to the basics behind these two. Here is a bit of an experience report on porting to Entity Framework Core. Dangers of Lazy Loading on GitHub. What is Lazy Loading or Deferred Loading? How to implement Lazy Loading in. For example, our app has a home module, login module, and personal module. Lazy loading. SaveChanges() method is called. TaskDescription will be handled just fine without lazy loading. Entity Framework Performance and What You Can Do About It Without a doubt, Entity Framework is a quick and satisfactory way of producing a database-driven web application. With regard to feedback, I think it is worth reiterating some comments made a few months ago. I call GetOrder()(shown in below) to get object Order, then want to access Order. Is there any way to disable lazy loading for specific query on Entity Framework 6? I want to use it regularly, but sometimes I want to disable it. Lazy loading brings in the related data on an as-needed basis, meaning when something touches the Contact property of a Friend, EF loads the data by sending an additional query to the database. Learn EF Core - querying-data-loading-eager-lazy by example. We can mark specific navigation properties or even whole entities as „lazy" by making them virtual. Any changes made to your entities, be it updates, inserts or deletes, are only persisted to the database when the DbContext. This keeps repeating infinitely and is called circular lazy loading. Lazy Loading in Entity Framework Core. The first type of access which we'll look at is lazy loading. Only Entity Framework can create a dynamic proxy, but in this scenario there is no way for it to do it - the caller already owns the reference to the. And I've lost track of how many times they basically restarted EF on the old series. Entity Framework is an object-relational mapper that enables. By default, Entity Framework supports LazyLoading for generated EntityObject classes. In this post I will be looking into Lazy Loading, Eager Loading, Explicit Loading options. Lazy loading Related entities are automatically loaded from the data source when you access a navigation property. Inside Entity Framework: Lazy Loading, Explicit Loading and Eager Loading When working with Entity Framework, it is important to understand how to hit the database and get the data especially to avoid the performance issues with the applications. Lazy Loading an Observable in KnockoutJS You could use this to indicate that something is currently loading or to display a refresh button after it has been loaded. Is there any way to disable lazy loading for specific query on Entity Framework 6? I want to use it regularly, but sometimes I want to disable it. Side by Side. The first release candidate of EF Core 2. For example, user opens a customer's details, when they click on the orders tab, orders are lazily loaded and if they want to see details of each order, order lines are loaded. On the roadmap for EF Core 2. Using Entity Framework POCO Lazy Loading with Distributed Cache. Here is a snippet of 3 calls. Instead of old data connections that required the developer to work with database connections, Entity framework allows the developer to create data model classes that do all of. Lazy loading brings in the related data on an as-needed basis, meaning when something touches the Contact property of a Friend, EF loads the data by sending an additional query to the database. \$\endgroup\$ - grek40 Feb 14 '18 at 11:42. I built a basic blog atop EF6. Here is a bit of an experience report on porting to Entity Framework Core. Try to loop through every nested collection when you use Lazy Loading. I have 3 more posts on Profiling Entity Framework applications. Loading Related Entities. For more such videos visit http://www. com For more such videos subscribe https://www. We have however noticed that lazy loading does not work with a private constructor. However, in some situations, you want to delay the loading of a nodes child items until they are actually needed. Lazy Loading Related Data In Entity Framework Core Lazy loading of data is a pattern whereby the retrieval of data from the database is deferred until it is actually needed. Noted EF expert Julie Lerman is also no big fan of lazy loading and has discouraged users from using it. As you can see in our part of domain layer, we have a complex design. After turning Lazy Loading off, you can still load the entities by explicitly calling the Load method for the related entities. NET Entity framework interview question video created by www. And I've lost track of how many times they basically restarted EF on the old series. Almost half of all users who visit a website view only a single page. Today we are excited to announce the release of Entity Framework (EF) Core 2. x to Entity Framework Core, there is likely one major road block: Lazy Loading. On the roadmap for EF Core 2. EF4 Lazy Loading feature demo (VBEFLazyLoadin g) This example illustrates how to work with the Lazy Loading which is new in ADO. It's retrieved from the database only if you access other properties of the entity. CarSetup will contain a Car entity who will contain an Event entity. NET Entity Framework 4. We can mark specific navigation properties or even whole entities as „lazy" by making them virtual. Porém, vi em alguns posts de blogs que o pessoal utiliza o Configuration. 1 RC 1 was released to the public. The idea that stands behind is really simple. The include method is used to tell EF which related entities to load. It will not (for the time being) be locked because it is important to us that we don't shut down channels of communication with the community. Entity Framework Code First data loading strategies Introduction This post describes three different loading strategies when using Entity Framework Code First approach: lazy loading, eager loading and explicit loading. Lazy Loading. This is an updated article that takes account of a) the release of Entity Framework Core (EF Core) and b) further investigations of different EF Core database access patterns. EnableLazyLoading = false/true; para ativar ou desativar o Lazy Load. What is Entity Framework Core? Entity Framework Core (EF Core) is the latest version of the Entity Framework from Microsoft. Current version of EF Core (2. The problem is almost always has something to do with the new lazy loading feature in Entity Framework 4. EF entities also contain a feature known as lazy loading. Lazy loading has an advantage that it gives you a performance boost as it loads stuff on need basis but flip side of this behaviour is that you loose control over what loads when and this can lead to problems sometimes. Putting in simple words, on demand object loading rather than loading objects unnecessarily. 0 and is described here for EF 4. Instead of old data connections that required the developer to work with database connections, Entity framework allows the developer to create data model classes that do all of. You can lazy load which will create more query to the database as Explicit load or you can Eager load and have less query to the database but more data in the same time. Lazy loading TreeView items. To track, or not to track. This article briefs on the two loading methods with a simple example which can help you with the decision. Eager loading is a process where related entities are loaded along with the target entity. Changing the constructor to protected however seems to get lazy loading to work again and still having some protection from public access on the constructor. 0, it introduces significant new capabilities: Lazy loading: EF Core now contains the necessary building blocks for anyone to write entity classes that can load their navigation properties on demand. NET that provides an automated mechanism to access and store data in the database With the help of ADO. Implementing Missing Features in Entity Framework Core - Part 6: Lazy Loading This will be the sixth post in my series of posts about bringing the features that were present in Entity Framework pre-Core into EF Core. Hi I am using Entity Framework 4 and am having a few problems with lazy loading. // Difference between eager loading and lazy loading. To lazy load images, we will use ng-defer-load library. You can have a look at them here, here and here. For example, the Student entity contains the StudentAddress entity. Lazy loading is a concept where we delay the loading of the object until the point where we need it. I'm currently working on a project that uses Entity Framework 4. Lazy Loading. I hope you will enjoy the Difference between Lazy Loading and Eager Loading. The concept of lazy-loading can be simplified to load an object. Lazy loading Related entities are automatically loaded from the data source when you access a navigation property. We have created the model from scratch with database first to make sure we don't have messed up something. There are many options to disable the Lazy loading feature in Entity Framework. In most circumstances I don't think lazy loading is a good idea. Entity Framework is a very popular object-relational mapping engine provided by Microsoft and is increasingly being used in high traffic applications. Hi i have a problem i am using Oracle 12c and Odac 12. For more such videos visit http://www. TaskDescription will be handled just fine without lazy loading. After turning off Lazy Loading, you can still load the related entity by explicitly calling Load() method to download related entities. Consider this: suppose you eagerly load N parents, each having M' children for a total of M children (I'm coming to lazy loading, bear with me). Hi, Is LazyLoading not built-in/supported in Core and how to enable it? Although the service code below works fine, I have to do the "includes" on every services which kinda cumbersome. With this type of loading, be aware that each navigation property that you access results in a separate query executing against the data source if the entity is not already in the ObjectContext. Lazy Loading in Entity Framework Core. There are many options to disable the Lazy loading feature in Entity Framework. png Now, let's say we need to iterate through all the Departments, and for each Department, we want to print the list of the employees. Lazy Loading genel anlamıyla bir nesnenin ihtiyaç duyulmaması halinde çağrılmaması esasına dayanmaktadır. Complex object are well loaded and the way you want with EF. What is Lazy Loading or Deferred Loading? How to implement Lazy Loading in. You can read it here. Lazy loading is achieved by creating derived proxy classes and overriding virtual navigation proeprties. Lazy loading is the process where the Entity Framework delays the loading of an entity or collection of entities until the time application actually needs it. The question that one needs to consider when loading related entities is whether to use Lazy Loading or Eager Loading. Include method to eagerly load associated entities, in order to avoid database roundtrips when I access them: Or if I also want to eagerly load the product: However, there's something that really bothers me …. Almost half of all users who visit a website view only a single page. The problem is almost always has something to do with the new lazy loading feature in Entity Framework 4. Lazy loading means loading your object when needed. For example, in the following query for Product model of the Product is fired when entity framework access the. Support for lazy loading was added to Entity Framework 4. Lazy-loading proxies for EF Core. Changes are only persisted when SaveChanges() is called. 0 this is possible, but can not do in the XRM the new SDK. The first type of access which we'll look at is lazy loading. for example: [crayon-5db423f66f793048162851/] in above code you will get all related tables in company object. Although EF Core 2. I'm using datable plugin with pagination in my project. Instead of old data connections that required the developer to work with database connections, Entity framework allows the developer to create data model classes that do all of. Lazy loading is a concept where we delay the loading of the object until the point where we need it. Lazy loading returns in EF Core 2. For Entity Framework users, new() and DbSet. It behaves as expected and correctly models many-to-many relationships - in this case, the fact that posts may have zero or more authors. These are not the obvious pain points about EF that you may have heard about frequently such as lack of lazy loading or the difficulties of change tracking across tiers. In this post I will explain why lazy loading can slow down performance and what you can […]. This keeps repeating infinitely and is called circular lazy loading. Entity Framework Code First data loading strategies Introduction This post describes three different loading strategies when using Entity Framework Code First approach: lazy loading, eager loading and explicit loading. Changing the constructor to protected however seems to get lazy loading to work again and still having some protection from public access on the constructor. 1: Using Lazy Loading Lazy Loading is a technique in which we have the option to load related data of a record in the future. If you were using Entity Framework, you may be using Lazy Loading unintentionally since it's built in by default. SaveChanges() method is called. It is good for data accessing. Hypothesis: lazy load will help speed up the initial bootstrap time and quicken the user experience. This article describes lazy and Eager Loading of data in the Entity Framework. And I've lost track of how many times they basically restarted EF on the old series. In general, the more expensive it is to load and maintain a related entity, the more often it must be used for eager loading to make sense. I'm using datable plugin with pagination in my project. One of the biggest issue when we use entity framework that is when we request for one single table you will get all related tables in table object. EF entities also contain a feature known as lazy loading. This keeps repeating infinitely and is called circular lazy loading. With Entity Framework 1, you didn't have lazy loading so this problem didn't surface. The main object that I am retrieving is the REF_Referrals object. Lazy loading Lazy loading of collections is the process whereby a collection of entities is automatically loaded from the database the first time that the collection property referring to the entities is accessed. It provides lot of benefits. Porém, vi em alguns posts de blogs que o pessoal utiliza o Configuration. 0 this is possible, but can not do in the XRM the new SDK. Specifying lazy="false" should result in combining the original sql query with the subselect query in one db trip IMO. Lazy Loading genel anlamıyla bir nesnenin ihtiyaç duyulmaması halinde çağrılmaması esasına dayanmaktadır. (I'm not sure which ones or how many. An archive of the CodePlex open source hosting site. Each object maps to a physical table in the database. Specifying lazy="false" should result in combining the original sql query with the subselect query in one db trip IMO. Putting in simple words, on demand object loading rather than loading objects unnecessarily. Here is a snippet of 3 calls. N+1 has always been the problem with EF. 0 does not support automatic lazy loading and eager loading related objects in the same way that EF6 did. Even with lazy loading disabled (in EF 6), it is still possible to lazily load related entities, but it must be done with an explicit call. Net backend developer when referring to entity creation using Entity framework. Include method to eagerly load associated entities, in order to avoid database roundtrips when I access them: Or if I also want to eagerly load the product: However, there's something that really bothers me …. I'm using datable plugin with pagination in my project. Interestingly, the last one will display value because the collection was already loaded. For example, when you query for Products, there are different ways that the related Orders will be loaded into the Object State Manager. CarSetup will contain a Car entity who will contain an Event entity. It can be used right along with lazy-loading so it won't be a disaster if you forget to call Load first. Net with C#?, Lazy loading is a technique, pattern where a data is loaded only ondemand or only when it is required in order to increase the program efficiency, performance, etc. There are times when entities don't need navigation properties on both sides of the relationship. Lazy loading brings in the related data on an as-needed basis, meaning when something touches the Contact property of a Friend, EF loads the data by sending an additional query to the database. With lazy loading, EF loads only the data for the primary object in the LINQ query (the Friend) and leaves the Contact object. Using Entity Framework With an Existing Database: Data Access Pre-existing SQL databases, particularly if complex, can often pose problems for software developers who are creating a new application. In this course, Entity Framework Core 2. Recommended Books on Amazon : Programming Entity Framework: Code First Entity Framework 6 Recipes. This article briefs on the two loading methods with a simple example which can help you with the decision. The problem that I am having is. This article will explain the. Just check if there is a association to a file with Flag brochure. One of these features is lazy loading of collections, and I set out to implement it… or, any way, something that I could use instead of it!. The process of lazily loading related entities is automatically handled by EF so 0:51. Lazy loading Related entities are automatically loaded from the data source when you access a navigation property. EntityFrameworkCore. As you can see in our part of domain layer, we have a complex design. Lazy loading is pretty much the default. What lazy loading does is allow the data to be retrieved from the data store when the collection of objects is iterated. I'm using datable plugin with pagination in my project. By continuously adding new content as the user scrolls, lazy loading can make that single view really count. What is Entity Framework Lazy Loading? Lazy loading is the procedure whereby an entity or collection of entities is automatically loaded from the database the first time that a property referring to the entity/entities is access. With Entity Framework, you either lazy load everything or you eager load everything, and eager loading, I can attest, is the shorter path to damnation. Lazy loading brings in the related data on an as-needed basis, meaning when something touches the Contact property of a Friend, EF loads the data by sending an additional query to the database. Entity Framework Core 2. In case you are not aware of "lazy loading" , please first read this entity framework interview question "What is lazy loading in entity framework ?"Below is a great ADO. Include method to eagerly load associated entities, in order to avoid database roundtrips when I access them: Or if I also want to eagerly load the product: However, there's something that really bothers me …. The loading types will be described using the following simple model. For web applications using LINQ and Entity framework, Lazy load or Eager load methods are the basic choices. Notice on the product object I have a virtual list of sale objects, making this virtual allows for entity framework to use lazy loading. "Both features are in the 2. 1: What's New Playbook, you'll learn how to take full advantage of the most impactful features added to EF Core 2 in this update. You can load related entities or data in EF in three ways. The problem that I am having is. This article describes lazy and Eager Loading of data in the Entity Framework. Here's Peter's advice on how to get the best performance when loading child objects. Net with C#?, Lazy loading is a technique, pattern where a data is loaded only ondemand or only when it is required in order to increase the program efficiency, performance, etc. For example, in the following entities, the Post. Lazy loading. With EF Core, lazy loading is available since version 2. If you use EF 6 - all of them are eagerly-loaded, and console app finished within a matter of seconds. Almost half of all users who visit a website view only a single page. NET Entity Framework 4. One expected feature of major ORMs is 'Lazy Loading'. Lazy loading Related entities are automatically loaded from the data source when you access a navigation property. Entity Framework and lazy loading Entity Framework and virtual properties. FirstOrDefault() will give you a single order, but if you look at the SQL executed you'll see that all orders for the customer are returned from the database; it is your code that is taking. This article will explain the. This is an example you can use to map to an existing database or generate a brand new database on Windows Azure SQL Database. With Entity Framework 1, you didn't have lazy loading so this problem didn't surface. Is there any way to disable lazy loading for specific query on Entity Framework 6? I want to use it regularly, but sometimes I want to disable it. Any changes made to your entities, be it updates, inserts or deletes, are only persisted to the database when the DbContext. Một trong những chức năng quan trọng của Entity Framework là lazy loading. Entity Framework's async features are there to support an asynchronous programming model, not to enable parallelism. Suppose we have two models, students and contacts, where each student can have several contacts, that is, there is a one to many relationship between students and contacts. Lazy loading TreeView items. Explicit Loading There are options to disable Lazy Loading in an Entity Framework. Lazy loading is enabled by default. Entity Framework Lazy Loading kullanımı tamamen bizim tercihimize kalmıştır. The main difference between the three are in when the related data gets loaded and whether it is done behind-the-scenes or explicitly. Many-to-many relationships in EF Core 2. For example, when you query for Products, there are different ways that the related Orders will be loaded into the Object State Manager. 1: Using Lazy Loading Lazy Loading is a technique in which we have the option to load related data of a record in the future. Each object maps to a physical table in the database. A new feature of EF6 is the possibility to log everything that Entity Framework is doing. One other with the lazy loading to true and one with false without the load. The first release candidate of EF Core 2. Lazy loading is a concept where we delay the loading of the object until the point where we need it. 1 plan, although lazy loading is a 'stretch goal,' meaning that we will do our best to get to it," Vega said. One of the biggest issue when we use entity framework that is when we request for one single table you will get all related tables in table object. This article describes lazy and Eager Loading of data in the Entity Framework. What are the main drawbacks of Entity Framework? The main drawbacks of EF are lazy loading. Last week (to be exact 7th of May, 2018) Entity Framework Core 2. Lazy loading can provide some help when it comes to forms over data applications and when user gets exposed to the illusion explained above. Get started with Entity Framework Core, EF Extensions, and other third parties libraries. 4 · Lazy Loading · Migrations · POCOs. Lazy loading means loading your object when needed. EnableLazyLoading = false/true; para ativar ou desativar o Lazy Load. NET that provides an automated mechanism to access and store data in the database With the help of ADO. Lazy loading brings in the related data on an as-needed basis, meaning when something touches the Contact property of a Friend, EF loads the data by sending an additional query to the database. I then re-worked the method so that instead of using the property of the Account, and thereby invoking the virtual lazy loading proxy, I used the relevant ObjectContext instead:. WCF, I've run into a issue with serializing Entity Framework object to JSON when returning them from the ApiController. Summary In this blog post I'm going to demonstrate how to lazy load your data using Entity Framework and SQL Server. It is good for data accessing. Is it mean that when I connect GridView to DataSource - it will load only current page ( or some. Các entity liên quan sẽ (được) load đồng thời với entity được query nếu sử dụng Include() - và quan trọng nhất là chỉ load 1 lần duy nhất. Lazy loading is a design pattern commonly used in computer programming to defer initialization of an object until the point at which it is needed. The main difference between the three are in when the related data gets loaded and whether it is done behind-the-scenes or explicitly. We can mark specific navigation properties or even whole entities as „lazy" by making them virtual. Due to this behavior if we are loading large number of records (especially if they have foreign key relations) then it may take long time. com/questpondvideos See our other Step by Step video s. Tenho uma Web Api que estou desenvolvendo utilizando o DotNet Core e EF Cor porém está com o Lazy Loading ativo, só que em alguns casos preciso carregar as entidades filhas e filhas das filhas, cri. They are all being lazy loaded. In fact, there are a couple of hoops you need to jump through to enable it so you won't be lazy loading by accident. Entity Framework Code First data loading strategies Introduction This post describes three different loading strategies when using Entity Framework Code First approach: lazy loading, eager loading and explicit loading. Using Entity Framework POCO Lazy Loading with Distributed Cache. Seems not to work lazy loading of navigation properties, while if i add a include keyword it is loaded. Learn how the Entity Framework provides this functionality in a different way. So, with the lazy loading, we have the total of 2 database roundtrips here. Lazy loading is the process whereby an entity or collection of entities is automatically loaded from the database the first time that a property referring to the entity/entities is accessed. com which shows how to do CRUD using Entity framework. Tenho uma Web Api que estou desenvolvendo utilizando o DotNet Core e EF Cor porém está com o Lazy Loading ativo, só que em alguns casos preciso carregar as entidades filhas e filhas das filhas, cri. I built a basic blog atop EF6. Net with C#?, Lazy loading is a technique, pattern where a data is loaded only ondemand or only when it is required in order to increase the program efficiency, performance, etc. In Entity Framework 4 and beyond Lazy Loading is enabled by default. In the future this might be replaced by EF lazy loading on column. It can also be used to lazy load any element in your angular application. For example, the Student entity contains the StudentAddress entity. It is very important to know what happens when EF generates on the fly the SQL queries that hit the database. For example, our app has a home module, login module, and personal module. Lazy loading is a concept where we delay the loading of the object until the point where we need it. For example, when you query for Products, there are different ways that the related Orders will be loaded into the Object State Manager. More Related Articles: Building your first ASP. For more such videos visit http://www. Using Include with Lazy Loading. In this article I will tell you what Is Lazy Loading and how you can leverage this feature in Code First Model. Any changes made to your entities, be it updates, inserts or deletes, are only persisted to the database when the DbContext. Load does not retrieve the entity from the database but creates a proxy object for lazy-loading. Lazy load is the technique to only load the modules needed and leave the rest on the server until required. Loading Related Entities. A new feature of EF6 is the possibility to log everything that Entity Framework is doing. However, in some situations, you want to delay the loading of a nodes child items until they are actually needed. 1 has brought back Lazy Loading that allows you not to worry about manually fetching the related entities beforehand. Explicit Loading There are options to disable Lazy Loading in an Entity Framework. We can disable it globally, on DbContext level, or selectively, on per-property level. it can seem like magic the first time that you see it in action. Suppose we have two models, students and contacts, where each student can have several contacts, that is, there is a one to many relationship between students and contacts. One other with the lazy loading to true and one with false without the load. In our previous tutorial, we discussed about lazy loading of related entities in Entity Framework. \$\endgroup\$ - grek40 Feb 14 '18 at 11:42. Các entity liên quan sẽ (được) load đồng thời với entity được query nếu sử dụng Include() - và quan trọng nhất là chỉ load 1 lần duy nhất. Lazy Loading in Entity Framework. Normally when we are fetching data from our database we want to make as few calls as possible. One expected feature of major ORMs is 'Lazy Loading'. Lazy loading TreeView items. Entity Framework v1 did not support a commonly implemented ORM feature called Lazy Loading. like Articles of User or Products of a Category; You exactly know that you will not need a property instantly. The usual process when using the TreeView is to bind to a collection of items or to manually add each level at the same time. As performance becomes more important, it does, however, require some knowledge of the traps that you need to avoid, and of the wrinkles that impact performance. Again, this is my prepared list of important Interview Questions on Entity Framework but reader can suggest/contribute more related concept area. Get started with Entity Framework Core, EF Extensions, and other third parties libraries. This is an updated article that takes account of a) the release of Entity Framework Core (EF Core) and b) further investigations of different EF Core database access patterns. In this course, Mosh, teaches you the core concepts of Entity Framework through a series of clear, concise and hands-on lectures. This article will explain the. How does lazy loading work when objectcontext is already out of scope(not disposed, if it is disposed, it will throw exception for sure)?. How to make lazy-loading work with EF Core 2. By default it is enabled, but it takes. Disable Lazy Loading. This is the latest production-ready release of our open-source and cross-platform data access technology. I have 3 more posts on Profiling Entity Framework applications. For example, in the following query for Product model of the Product is fired when entity framework access the. 1) will introduce this. For Entity Framework users, new() and DbSet. Lazy loading has an advantage that it gives you a performance boost as it loads stuff on need basis but flip side of this behaviour is that you loose control over what loads when and this can lead to problems sometimes. 1, but luckily, EFCore 2. Eager Loading; Lazy Loading; Explicit Loading; 10) Mention what is Code First approach and Model First Approach in Entity Framework? In Entity Framework, Model First Approach: In this approach we create entities, relationships directly on the design surface of EDMX. CarSetup will contain a Car entity who will contain an Event entity. Entity Framework, Context and Lazy-Loading 22 May 2011 Jan-Heggernes C# , Entity Framework , Performance I wanted to write up a short little entry about how the ObjectContext and Lazy-Loading works in situations where you typically lazy-load entities. Only Entity Framework can create a dynamic proxy, but in this scenario there is no way for it to do it - the caller already owns the reference to the. Entity Framework Plus A FREE & Open Source library to enhance EF6 and EF Core. It can be used right along with lazy-loading so it won't be a disaster if you forget to call Load first. Why did EF queried all columns since part of them are only visible in listView? > 2. Unfortunately we have big problem with these methods in entity framework. Side by Side. The problem isn't lazy loading, but the way it's done. This is an example you can use to map to an existing database or generate a brand new database on Windows Azure SQL Database.