using System.Linq.Dynamic.Core; // 假设有一个名为"tableName"的表,以及要动态传递的列名和值 string columnName = "ColumnName"; string columnValue = "ColumnValue"; // 创建动态LINQ查询 var query = dbContext.Set<tableName>() .Where($"{columnName} = @0", columnValue); // 执行查询 var ...
注:使用Include 方式获取的数据为对应类型的对象,而不是动态类型Dynamic_xxxx MenuModelContext _Context = new MenuModelContext(); List<Menu> list = _Context.Menus .Include(q => q.Model) //手动指定关联表查询,一对一 .ToList(); foreach (var item in list) { Console.WriteLine(item.MenuName);...
其实说的简单一点就是再每一张数据库的表中添加一个TenantId的字段，用于区分属于不同的租户（或是说...
{varcurrentMonth=ShardingCoreHelper.GetCurrentMonthFirstDay(shardingKey);//处于临界值 o=>o.time < [2021-01-01 00:00:00] 尾巴20210101不应该被返回if(currentMonth == shardingKey)returntail=> String.Compare(tail, t, StringComparison.Ordinal) <0;returntail=> String.Compare(tail, t, StringComparis...
modelBuilder.Entity<MyEntity>().ToTable((string)null); dotnet-ef 目標為 .NET 6追蹤問題 #27787舊的行為dotnet-ef 命令現在已將 .NET Core 3.1 設為目標。 這可讓您使用較新版本的工具,而不需要安裝較新版本的 .NET 運行時間。新的行為在EF Core 6.0.6 中,dotnet-ef 工具現在以 .NET 6 為目標。
modelBuilder.Model.AddEntityType(item).SqlServer().TableName = ""; } _cache.Set(DynamicCacheKey, modelBuilder.Model); return modelBuilder.Model; }); optionsBuilder.UseModel(model); base.OnConfiguring(optionsBuilder); } 当模型配置发生变化时,把缓存清理一下,这样下次再访问的时候,就能够按照新的配置...
System.Linq.Dynamic.Core nuget安装:System.Linq.Dynamic.Core 1、System.Linq.Dynamic.Core 2、使用字符串格式的语法来进行数据操作 var query = db.Customers .Where("City == @0 and Orders.Count >= @1", "London", 10) .OrderBy("CompanyName") ...
EFCore.BulkExtensionsEntityFrameworkCore extensions (performance improvement - into overdrive): -Bulk operations (super fast): Insert, Update, Delete, Read, Upsert, Sync, SaveChanges. -Batch ops: Update, Delete - Deprecated from EF8 since EF7+ has native Execute-Up/Del. -AddOps (additional): ...
We definitely plan allowing the new "complex type" feature to map to JSON columns in EF Core 9.0 - though you can already use owned types to do that today; they are conceptually very similar. However, there's definitely no plan to allow complex type to work with dynamic/object; the whol...
使用Entity Framework (EF) 进行数据模型设计时,正确配置实体映射关系至关重要,这有助于精确控制数据库模式的生成和数据的持久化方式。EF Core2.0和EF6中,分别通过IEntityTypeConfiguration和EntityTypeConfiguration配置实体映射关系的代码。 1、EF6中通过EntityTypeConfiguration配置实体映射关系代码 ...