entity-framework

问题 Basically I am mixing EF with one call to a stored procedure which does some batch deletions, otherwise EF is too slow. Here is some pseudo-code of this scenario (I have more complex code in reality): public void RemoveCustomer(int customerUID) { // this code is running in one db transaction { // retrieve certain orders of particular customer using EF var orders = repoOrders.GetOrdersOfCustomer(filter, customerUID); // do something with above orders before deletion using EF repoX

问题 I've created an MVC project using entity framework code first. My model is simply a form that gathers information. public class Application { public int Id { get; set; } public string FirstName { get; set; } public string MiddleInitial { get; set; } public string LastName { get; set; } public int SSN { get; set; } public DateTime DOB { get; set; } public string Street { get; set; } public string City { get; set; } public string State {get; set; } public string Zip { get; set; } public int

问题 I've created an MVC project using entity framework code first. My model is simply a form that gathers information. public class Application { public int Id { get; set; } public string FirstName { get; set; } public string MiddleInitial { get; set; } public string LastName { get; set; } public int SSN { get; set; } public DateTime DOB { get; set; } public string Street { get; set; } public string City { get; set; } public string State {get; set; } public string Zip { get; set; } public int

问题 I am trying to do this tutorial http://www.asp.net/mvc/tutorials/getting-started-with-aspnet-mvc3/getting-started-with-mvc3-part4-cs but instead of using the compact edition of SQL Server I am using a full install on my local machine. The way I read this tutorial is that the Entity Framework is suppose to create the tables from the objects I have defined. My problem is that I keep getting invalid object name dbo.movies, when I run the project. I finally got it to run by creating the table

问题 I have an asp.net-mvc application with the default membership database. I am accessing it by ADO.NET Entity Framework. Now I want to move it to IIS, but several problems showed up. I had to install SQL Server Management Studio, Create new DB, import there all the data from the previous .MDF file. Only thing left to do (as far a I know) is to change to connection string. However, I am not really experienced with this and keep getting the Keyword not supported: 'data source'. exception. Here is

问题 Very simple question: Are controllers in ASP.NET created for every HTTP request, or are they created at application startup and reused throughout requests? Will the controller be created only for a particular HTTP request? If my previous assumptions are correct, can I depend on it? I want to create database context (Entity Framework) that will live only for one request. If I create it as a property initialized in controller's constructor, is it granted that new instance of context will be

问题 Very simple question: Are controllers in ASP.NET created for every HTTP request, or are they created at application startup and reused throughout requests? Will the controller be created only for a particular HTTP request? If my previous assumptions are correct, can I depend on it? I want to create database context (Entity Framework) that will live only for one request. If I create it as a property initialized in controller's constructor, is it granted that new instance of context will be

问题 I have two POCO classes public class Order { int id; string code; int? quotationId; //it is foreign key public int Id{get;set;} public string Code{get;set;} public int? QuotationId{get;set;} Quotation quotation; public virtual Quotation Quotation { get; set; } .... } public class Quotation { int Id; string Code; public int Id{get;set;} public string Code{get;set;} Order order; public virtual Order Order { get; set; } .... } each Order may made from one or zero quotation, and each quotation

问题 I have two POCO classes public class Order { int id; string code; int? quotationId; //it is foreign key public int Id{get;set;} public string Code{get;set;} public int? QuotationId{get;set;} Quotation quotation; public virtual Quotation Quotation { get; set; } .... } public class Quotation { int Id; string Code; public int Id{get;set;} public string Code{get;set;} Order order; public virtual Order Order { get; set; } .... } each Order may made from one or zero quotation, and each quotation

问题 I'm analyzing the queries that are running in a DB (Azure Sql Server V12) and I found a few queries generated by Entity Framework (EF 6.0) that make no sense to me. They are really bad for performance and I cannot find where they are generated. (@p__linq__0 nvarchar(4000))SELECT CASE WHEN ( EXISTS (SELECT 1 AS [C1] FROM [dbo].[SellerPhone] AS [Extent1] WHERE [Extent1].[Phone] = @p__linq__0 )) THEN cast(1 as bit) WHEN ( NOT EXISTS (SELECT 1 AS [C1] FROM [dbo].[SellerPhone] AS [Extent2] WHERE