DATEDIFF in linq (in months)

The LINQ expression node type 'Invoke' is not supported in the entity framework's LINQ to Entities.

The AsExpandable() function created by Joe Albahari and included in LINQKIT may be used to remedy this issue. He is the same person behind...PredicateBuilder... thing you're utilizing, I see....If querying with Entity Framework, change the last line to this:...return objectContext.Products.AsExpandable().Where(predicate);...You may download the LIN...

Entity Framework: Efficient month grouping

The whole table is retrieved into memory using the AsEnumerable() function, which results in poor performance. You may then arrange the groups according to Year and Month....var trendData = (from d in ExpenseItemsViewableDirect group d by new { Year = d.Er_Approved_Date.Year, ...

Linq query with month difference between 2 dates

You might attempt the ...EntityFunctions.DiffMonths... utility method if you have.NET 4+, for example:...var query = query .Where(i=> EntityFunctions.DiffMonths(i.FromDate, i.ToDate) == 2 );

Entity Framework 6 SqlFunctions DateDiff not implemented in nuget package

I should have been looking elsewhere. System contained the correct functionality. Data.Entity. SqlServer. SqlFunctions. The right answer came out to be...RepositoryFactory.CreateReadOnly<MyEntity>() .Where(at => at.AccessedDate.HasValue && at.CreatedDate >= startDate && at.CreatedDate <= endDate && SqlFunctions.DateDiff("ss", a...

Using DateDiff with Linq.Dynamic library for fetching today records

Use ...DbFunctions....Where(p => DbFunctions.DiffDays(p.AddedDate, DateTime.Now) == 0) ...Edit:...You must change the code for the Dynamic LINQ if you wish to invoke this dynamically....Get the ...project example that includes DynamicLibrary.cs.... The subdirectory called App Code contains the file....Look up the definition for static...predefinedT...

ASP.Net MVC - Razor Displaying account totals for customers by Month/Year Columns

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Only parameterless constructors and initializers are supported in LINQ to Entities in linq join with tuples

To get data from the database and convert it to a Tuple in memory, use the anonymous type....var list = ( from a in db.CategoryRatings join c in db.OverallPerformanceByCategories on a.CategoryRatingId equals c.CategoryRatingId where c.ReviewId == review.ReviewId select(new {a.CategoryRatingName, a.CategoryWeight, c.Score}) )...

Entity Framework groupby day to day in month

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Unable to cast object of type 'System.Linq.Expressions.MethodCallExpression' to type 'System.Linq.Expressions.LambdaExpression'

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How to get first day of month/year etc?

Using ...System.Linq.Dynamic.Core..., it ought to be achievable....EFCore...void Main() { var r = Reservations.Select("DateTime(CheckinDate.Year,1,1)"); r.Dump(); } ...Result for EFCore...SQL generated by EFCore...EF 6...Using Entity Framework 6 requires the following:...var datesDynamic = ctx.Reservations.Select("DbFunctions.CreateDateTime...