Dbset to ienumerable

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WebJun 16, 2015 · DbSet set = dbSet; foreach (var includeProperty in includeProperties.Split (new char [] { ',' }, StringSplitOptions.RemoveEmptyEntries)) { set = set.Include (includeProperty); } IQueryable query = set; if (filter != null) { query = query.Where (filter); } Share Improve this answer Follow answered Jun 16, 2015 at 16:14

Explain IEnumerable and IQueryable and how EF query …

WebA DbSet represents the collection of all entities in the context, or that can be queried from the database, of a given type. DbSet objects are created from a DbContext using the …WebAug 7, 2014 · IEnumerable mapLocationImageGalleries = await db.mapLocationImageGalleries.Where (m => m.userName.Equals (userName)).ToListAsync (); IEnumerable mapLocationVideoGalleries = await db.mapLocationVideoGalleries.Where (m => m.userName.Equals … movie theaters green valley az

c# - Issues updating moq creating mock dbSet with T objects …

WebThis is an internal .Net class that implements IEnumerable, not IQueryable. So a conversion to another type has taken place and the subsequent AsQueryable can never return the original source anymore. The implication of this is that using AsQueryable is not a way to magically inject a query provider with its specific features into an enumerable. WebAug 31, 2024 · That’s why DbSet (in Entity Framework) also inherits IQueryable to get the efficient query. Do not load every record, e.g. if Take (5), it will generate select top 5 * SQL in the background. This means this type is more friendly to SQL Database, and that is why this type usually has higher performanceWebAug 5, 2015 · In short, IQueryable enables filtering at the database level BEFORE data is read in memory, where as IEnumerable can only filter data that is read in memory. However, this does not mean that the COMPLETE SET of data will be read in memory before any filtering is applied. movie theaters gretna ne

How to convert from DbDataReader to Task

WebFeb 1, 2024 · DbSet was originally made to implement IAsyncEnumerable so that it would be possible to async-enumerate it with the await foreach construct. C# 9 has changed foreach to pattern match, so any type … http://duoduokou.com/csharp/17733847694293190864.htmlheating oil price per gallon massachusettsWebDec 27, 2024 · In EF6, you could do: private async Task> GetByExpressionAsync (Expression> where)) { return await _context.DbSet ().Where (where).ToListAsync (); } Assuming that the where expression could be evaluated server-side, this would translate to a SQL query like SELECT …heating oil price per gallon today in ct

"WebSep 6, 2024 · You should change your DbContext to use the actual user type: public class SocialNetworkDbContext : IdentityDbContext, int> { } If you have a class for the roles, you should use that as the generic type argument as well. This way you won't need any type casts. Share Follow answered Sep 6, 2024 at 9:20 juunas" - Dbset to ienumerable

Dbset to ienumerable

c# - Entity Framework Core IEnumerable async - Stack Overflow

WebAug 13, 2012 · No, converting to IEnumerable does not cause it to execute. It does, on the other hand, take the query into object space, so the SQL generated will be different when you project onto an anonymous type. Watch SQL Server Profiler to see the … Web2 days ago · I'm working on upgrading testing project from .NET Framework to .NET 6 that utilizes Moq. I have the following function that is used to create a Mock of a DbSet object by using the provided set of

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WebDec 26, 2015 · public DbSet Countries { get; set; } // Country derives from IdNamePairBase How can I pass the name of one of these to a query, to get all items in that list? E.g. var list = db.GetNamedDbSet("Countries"); Then, for bonus points I need to get an IEnumerable from list. </project,> </func>

WebMar 19, 2015 · The compiler infers the type of the expression to the right of the assignment, this is known as implicit type in C#. Now, you are trying to assign, your query like this, we have System.Data.Entity.DbSet on right & System.Linq.IQueryable on left which are different types:- IQueryable query = _db.Accommodations; WebFeb 1, 2024 · At the time your reader is called it is already closed as the using-block is complete.Also you need to read "row by row". Try the follwoing: private async Task ...

WebMay 16, 2024 · DbSet Implements the IQueryable & IEnumerable interfaces This allows us to query the database using the LINQ query. Using DbSet The following are few of the examples on how to use DbSet. Adding Single Record The Add method adds the given entity to the context in the Added state.WebJun 5, 2024 · Solution 1. db.Banks is of type DbSet.This class does not implement ICollection interface. Change the return type of the method to IQueryable or IEnumerable.. public class BankRepository : IBankRepository { HefContext db = new HefContext(); public IQueryable GetAll() { return db.Banks; } }

Web我覺得自己失去了我的知識。實際上，問題看起來很簡單：我想創建一個操作對象的類繼承自System.Windows.Forms.Form 實現接口IDescribedActionsProvider 與此同時。我可以創建一個新的Form類型公共抽象類SpecialForm：Form，IDescrib

WebJul 14, 2024 · 1. definitely, 2. if you convert the enumerable to list then it will have to enumerate everything, but if you don't and just return the queryable object then it will only read matching values. – Bizhan Jul 14, 2024 at 13:34 Should I make the GetValuesAsync an async method? - if you call it ....Async - then YES, by all means, make it async! movie theaters hailey idahoWebNov 23, 2016 · The source IQueryable doesn't implement IAsyncEnumerable. Only sources that implement IAsyncEnumerable can be used for Entity Framework asynchronous operations. The extension method is a method from Entity Framework Core. How can I convert my list of customers to the IAsyncEnumerable? movie theaters greensboro nc friendly centerhttp://duoduokou.com/csharp/26365970509186891086.htmlheating oil price per gallon nyWebOct 6, 2015 · Explanations: My DbSet will be read-only. Lets say I have 3 tables in my Database. I wrote an SQL query that . Stack Overflow. About; Products For Teams; ... And returning IEnumerable will execute the query - you'll have to return an IQueryable to avoid execution. In fact, this answer doesn't show anything different from what LINQ to Entities ... heating oil price per gallon nycWeb[英]C# WCF - ADO.NET Entity model - DbSet empty? user22015 2014-03-09 15:54:59 392 1 c#/ wcf/ entity-framework. 提示:本站為國內最大中英文翻譯問答網站，提供中英文對照查看 ... 據我所知，您不能使用WCF在電線上傳遞IEnumerable對象（除非您具有某種形式的雙工 … heating oil price per litreWebSep 14, 2024 · The IEnumerable source has generally originated from a LINQ to DataSet expression or method query. The schema of the cloned DataTable is built from the columns of the first enumerated DataRow object in the source table and the name of the cloned table is the name of the source table with the word "query" appended to it. movie theater shakopee town squareWebIEnumerable IEnumerable dbSet = dbContext.Set(myType); items.AddRange(from object obj in dbSet select new SelectListItem { Text = nameProp.GetValue(obj).ToString(), Value = valueProp.GetValue(obj).ToString(), }); [linq]相关文章推荐; LINQ使用存储过程更新数据集 ...heating oil price per gallon wny