entity-framework-core-3.1

问题 I am using a LINQ query on a DbSet<T> : await _dbContext.Users.AnyAsync(u => u.Name == name); However, the compiler outputs the following error: Error CS0121: The call is ambiguous between the following methods or properties: 'System.Linq.AsyncEnumerable.AnyAsync<TSource>(System.Collections.Generic.IAsyncEnumerable<TSource>, System.Func<TSource, bool>)' and 'Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.AnyAsync<TSource>(System.Linq.IQueryable<TSource>, System.Linq

问题 I am using a LINQ query on a DbSet<T> : await _dbContext.Users.AnyAsync(u => u.Name == name); However, the compiler outputs the following error: Error CS0121: The call is ambiguous between the following methods or properties: 'System.Linq.AsyncEnumerable.AnyAsync<TSource>(System.Collections.Generic.IAsyncEnumerable<TSource>, System.Func<TSource, bool>)' and 'Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.AnyAsync<TSource>(System.Linq.IQueryable<TSource>, System.Linq

问题 I am using a LINQ query on a DbSet<T> : await _dbContext.Users.AnyAsync(u => u.Name == name); However, the compiler outputs the following error: Error CS0121: The call is ambiguous between the following methods or properties: 'System.Linq.AsyncEnumerable.AnyAsync<TSource>(System.Collections.Generic.IAsyncEnumerable<TSource>, System.Func<TSource, bool>)' and 'Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.AnyAsync<TSource>(System.Linq.IQueryable<TSource>, System.Linq

问题 I am using a LINQ query on a DbSet<T> : await _dbContext.Users.AnyAsync(u => u.Name == name); However, the compiler outputs the following error: Error CS0121: The call is ambiguous between the following methods or properties: 'System.Linq.AsyncEnumerable.AnyAsync<TSource>(System.Collections.Generic.IAsyncEnumerable<TSource>, System.Func<TSource, bool>)' and 'Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.AnyAsync<TSource>(System.Linq.IQueryable<TSource>, System.Linq

问题 I am using a LINQ query on a DbSet<T> : await _dbContext.Users.AnyAsync(u => u.Name == name); However, the compiler outputs the following error: Error CS0121: The call is ambiguous between the following methods or properties: 'System.Linq.AsyncEnumerable.AnyAsync<TSource>(System.Collections.Generic.IAsyncEnumerable<TSource>, System.Func<TSource, bool>)' and 'Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.AnyAsync<TSource>(System.Linq.IQueryable<TSource>, System.Linq

来源： https://stackoverflow.com/questions/59624695/entity-framework-core-3-1-return-value-int-from-stored-procedure

问题 I am trying to group join in EF core 3.1 the problem it returns Processing of the LINQ expression 'DbSet failed. This may indicate either a bug or a limitation in EF Core my code is like this var employees = await (from enrollment in RepositoryContext.Enrollments join allowance in RepositoryContext.Allowances.Include(y=>y.AllowanceType) on enrollment.EmployeeId equals allowance.EmployeeId into allowances select new { enrollment, allowances } ).AsNoTracking().ToListAsync(); the allowances is

问题 I have a model that looks like this: public class Facility { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; } public NetTopologySuite.Geometries.Point Location { get; set; } } Test code for adding a Point: var testFacility = new Facility(); testFacility.Location = new NetTopologySuite.Geometries.Point(13.003725d, 55.604870d) { SRID = 3857 }; //Other values tested with the same error error //testFacility.Location = new NetTopologySuite.Geometries.Point(13