entity framework select

Multiple diagrams in Entity Framework 5.0Visual Studio provides a facility to split the design time visual representation of the Entity Data Model. This means can has multiple diagrams for one Entity Data Model.You can create a new diagram in multiple ways: Add a new diagram and drag and drop entities from Mod

Entity Framework Power Tools is a tool that is provided by the EntityFramework development team to generate a fluent version of code first from an existing database.Roughly speaking, this tool has several features:1) According to the existing database structure, generate code First POCO class, DbContext class, and corresponding mapping class.2) View the Entity Da

, people began to match data in relational databases with a collection of entity model objects using generic technology, which solves the shortcomings of the DataTable approach, and it has the characteristics of strong typing, auto-completion in VS, compile-time checking, etc. NET Developer's favorite.In order for developers not to do this "match" work manually, many ORM tools (such as entity

()) { Console.Write("Enter a name for a new blog:"); var name = Console.ReadLine(); var blog = new Blog { Name = name }; db.Blogs.Add(blog); db.SaveChanges(); var query = from b in db.Blogs orderby b.Name select b; foreach (var item in query) { Console.WriteLine(item.Name); } } } public class Blog { public int BlogId { get; set; }

field: using (var ctx = new PortalContext()){ var citieNames = ctx.Cities .Where(c => c.ProvinceID == 3 c.ProvinceID > 10) .OrderBy(c => c.CityID) .Select(c => c.CityName); foreach (var cityName in citieNames) { Console.WriteLine(cityName); }} The LINQ Extension Method reads multiple fields: using (var ctx = new PortalContext()){ var cities = ctx.Cities .Where(c => c.ProvinceID == 3 c.ProvinceID > 1

Entity Framework 6 Recipes Chinese translation series (45), entityframework For the original intention of translation and why I chose Entity Framework 6 Recipes, see the beginning of this series.8-6 get the original object Problem 　　You are using POCO and want to obtain the original object from the database. Solution S

[Original] Entity Framework query principle, entityframeworkPreface The full name of Entity Framework is ADO. NET Entity Framework, which is an ORM (Object/Relational Mapping) Framework

I recently re-learned Entity Framework. I saw a good learning tutorial. I will repost it here. The tutorial is as follows. Abstract: I recently studied Microsoft's ef. After studying this time, I feel that this EF is not perfect yet. It is a semi-finished product. However, it is said that in. net4.0, Microsoft will recommend this framework and improve it. In addi

ASP. net mvc Entity Framework getting started tutorial and source code, mvcentityThe main purpose of this article is 1. describes how to use Entity Framework Power Tools. 2. Entity Framework quick door Lab environment: OS: Windows

[EF] How to manually set the Migration job of Code First in Entity Framework, entitymigration The Entity Framework (EF) has developed to the present, and the version has entered 6.1.0. It has been six months since I wrote the article "build an EF database in Code First mode in VS2013. If you started using EF Code First

. Net 4 is accompanied by the release of an Entity Framework (EF)-a data access function library located in the system. Data. entity namespace. When Entity Framework was first released in. Net 3.5 SP1, manyProgramThe staff gave us feedback and pointed out what they thought

months about some of the methods used by EF in the latest project-Entity Framework and object-oriented. If it is too long, select the focus.EF covers: type matching, object structure, and data source differentiation.In terms of type matching, the OO type and the database type are matched, which is the basis of the ORM. For integers, floating points, strings, and

2014 began to contact the Entity Framework 6 also nearly two years, with it has precipitated a mature architecture, also used to develop a lot of large and small products and projects, until this time, really have time to review, re-learn it, in order to let you know more about the Entity framework 6, and want to take

Entity Framework tutorial -- create an object data model, entityframework Create an object data model: This article will show you how to create an EDM SchoolDB database and understand the infrastructure module. The Entity Data Model (EDM) is a model used to describe the relationship between entities. The following uses Visual Studio 2012 and EF6 to create a Schoo

REPLACE PROCEDURE" HR". " Proc_get_emp_by_dept_name "2 (3Dept_nameinch VARCHAR2 DEFAULT NULL,4 Cur_emps out Sys_refcursor5) as6Sql_stmtVARCHAR2( the) := 'SELECT t1.first_name, T1.last_name, t2.department_name from Employees T1' ||7 'JOIN Departments t2 on t1.department_id = t2.department_id';8 BEGIN9 IFDept_name is not NULL ThenTenSQL_STMT:=Sql_stmt|| 'WHERE t2.department_name =' || " '" ||Dept_name|| " '"; One

}). firstordefault (); If (Result ! = Null ){Console. writeline (result. Name );}Console. readkey ();} The final generated SQL script is: Select Top ( 1 ) [ Extent1 ] . [ ID ] As [ ID ] , [ Extent1 ] . [ Name ] As [ Name ] From [ DBO ] . [ User ] As [ Extent1 ] Where (N ' Flydragon3 ' = [ Extent1 ] . [ Code ] ) And (N ' Haha3 ' = [ Extent1 ] .

In the previous article, we discussed the basic data binding knowledge of the DataGrid. In today's tutorial, I will show you how to use the ADO. NET Entity Framework to perform basic interactions with databases. Overview To make things easier, I will first explain how to retrieve data from the database and return it to the DataGrid. This example shows the following functions: 1) Click the [get data] b

Entity Framework power tools is an add-on of Visual Studio. Entity classes can be generated based on the database structure. For developers who use ADO. NET Entity Framework, especially those who useCodeDevelopers with priority (code first) can try it. If you want to use it

ArticleDirectory Use tools to track SQL statements generated by EF Differences between iqueryable, ienumerable, and ilist Test Results Conclusion Use tools to track SQL statements generated by EF When Using ORM frameworks such as Entity Framework, SQL is transparent to users. Many people do not care about the SQL statements generated by Orm, however, when the system encounters perform

Label: des style blog HTTP color Io ar JavaPreface LINQ (Language Integrated Query) is a group used for C # and VB.. Net Language extension, which allows the compilation of C # Or VB.. Net code, which operates the memory data in the same way as the query database. 7: LINQ to entities in the series of Entity Framework technology provides a wide range of SQL-like Query syntaxes, which are powerful and easy to