Part 4 using entity framework Step1: Install entity framework using nuget package manager. Step2: Add a class file to the Models folder.(class name must equal connection string name and inherit DBContext,DBContext is in the namespace of System.Data.Entity) Step3: Add a connection string, to...
I am using entity framework with a wpf project. EF is installed, but when I click to add new item, I cannot add EF into the project. The add option doesn't appear. I want to generate a logical entity directly from the database. I used to be able to do…
首先,Scaffold-Dbcontext是一个Package Management Console命令(针对Visual Studio用户,非Visual Studio用户可以参考.NET Core CLI指令https://docs.efproject.net/en/latest/cli/dotnet.html),可以使用-Verbose来使其dump具体的错误信息; 其次,最新的Entity Framework 1.0 RC2依赖于Powershell 5.0,所以会导致许多问题。...
跟Entity Framework之前的版本不同,Class DbContext不再有AcceptAllChanges()方法。 使用Transaction需要使用DbContext中的Database对象。 using (var transaction = await _dbContext.Database.BeginTransactionAsync()) { try { ... Operation on object _dbContext.TableA.Add(rowa); // Add rowa to Table A ...
Select data as DataTable object for a database using Entity Framework Download source - 8.9 KB Background At a particular situation in an application, we had to get back the results in the form of a DataTable object. The application was using the Oracle database and Entity Framework EDMX....
Minimal dependencies: Migration bundles don’t necessitate the presence of an Entity Framework tool or the .NET SDK to execute a bundle. Only the .NET runtime is required, and you can even create self-contained bundles that include the .NET runtime, offering flexibility in application deployment...
Therefore, this chapter shows you recipes made only with ASP.NET MVC 4 and Entity Framework. Two other forms of ASP.NET technology—ASP.NET Web Forms and ASP.NET Web Pages—are not covered in this chapter.doi:10.1007/978-1-4302-5789-9_4Brian Driscoll...
In this chapter, we show you how to use the Entity Framework in your ASP.NET web pages. You could, of course, use many of the methods shown throughout this book in the code behind for your pages, but in this chapter we focus specifically on using the declarative approach provided by ...
Entity Framework does a great job at simplifying the way we interact with storage. Sometimes we need to use parallelism to speed up the completion of a task. This is usually done by means of multithreading (note: always prefer to use a new context per request, instead of a context ...
Using Entity Framework in Silverlight with Visual Basic The walkthrough covers the end-to-end experience: writing the WCF service, using EF’s Self-Tracking Entities to send data over the wire, and writing the Silverlight UI in XAML. Finally, it also shows hownew VB10 features(including State...