var terrains = new[] { Terrain.River, Terrain.Beach, Terrain.Park }; var walksWithTerrain = await context.Walks .Where(e => terrains.Contains(e.Terrain)) .Select(e => e.Name) .ToListAsync(); 這已由目前的 EF Core 版本轉譯,方法是內嵌要尋找的值。 例如,使用 SQL Server 時:SQL...
var info = new List<string>(); ef 查询语句 query.Where(x => info .Contains(x.Barcode)) 报错$ 附近错误 这是ef 为了兼容 ,把查询语句转成了 类似下方语句 where barcode in( SELECT 1 FROM OpenJson(@__names_0) AS) 解决方法: 重点是添加 o => o.UseCompatibilityLevel(120) 兼容2014数据库 ...
一. 新功能清单 详见:https://learn.microsoft.com/zh-cn/ef/core/what-is-new/ef-core-8.0/whatsnew 二. 中断性变更 1. LINQ 查询中的 Contains 低版本SQLServer失效 (1). 说明 从EF Core 8.0 开始,EF 对Contains 可生成更高效的 SQL,但在 SQL Server 2014 及更低版本上不受支持。 旧版本生成的SQL...
In fact, this performance issue is thesecond most highly-voted issuein the EF Core repo; and as with most performance problems, your application may be suffering from it without you knowing about it. We clearly need a better solution for translating the LINQ Contains operator when the collectio...
Breaking changes in EF Core 6 Target Framework EF Core 8 targets .NET 8. Applications targeting older .NET, .NET Core, and .NET Framework versions will need to update to target .NET 8. Summary Expand table High-impact changes Containsin LINQ queries may stop working on older SQL Server ve...
Everything in EF8 Overall, EF8 RC 2 contains all the major feature features we intend to ship in EF8, although further tweaks and bug fixes are coming for GA. These features include: Allow Multi-region or Application Preferred Regions in EF Core Cosmos ...
In .NET 7 EF Core I was able to do something like this. Works great: var beers = await (from b in Db.Beer where beerIds.Contains(b.Id) select b).ToListAsync(); In .NET 8 Preview 6 I get the following error: Message: "Incorrect syntax nea...
PS:在EF Core中StartsWith、Contains和EndsWith模糊查询实际分别被解析成为Left、CharIndex和Right,而不是Like,而EF.Functions.Like会解析成Like语句。 2、添加Z.EntityFramework.Plus.EFCore依赖使用一些特殊的语法 这个是免费的,但 Z.EntityFramework.Plus的一些批量数据操作的包是收费的 ...
EF Core 7.0.8 isavailable on NuGet now. This is apatch release of EF Core 7.0containing only updates to dependencies. There are no additional fixes in this release beyond those already shipped in EF Core 7.0.7. EF Core 7.0.7 was also release since the last new update. It contains the...
當更新或刪除作業是由 SaveChanges 或SaveChangesAsync 觸發時,資料庫中並行權杖的值會與 EF Core 所讀取的原始值比較:如果值相符,作業便能完成。 如果值不相符,EF Core 就會假設另一位使用者已執行衝突作業,而將目前的交易中止,並擲回 DbUpdateConcurrencyException。