Linq to Devart 实体框架中的编译查询

发布于 2024-12-25 14:24:15 字数 951 浏览 5 评论 0原文

对于编译查询，在 LINQ to Object Entity FrameworkWork 中，基本上它允许查询一次编译，然后可以重复使用，而无需另一次编译。

例如：

using System.Data.Objects;
public static Func<entity, string, IQueryable<Entity>>
    TestQuery = CompiledQuery.Compile((entity db, string param) =>
        from e in ctx.Entities where e.Field == param select e);

我的问题是 LINQ to Devart Entity FrameWork ，无法传递实体。因为它只允许数据上下文作为有效参数。

请建议我如何将 linq 转换为用于编译查询的 devart 实体框架（edml）。

注意：它在“Devart LinqConnect Model(lqml)”中工作正常例如：

 public static Func<MyContext.dataContext , long,
             IQueryable<EMyContext.dataContext.tableName>>
           shopByCountry = CompiledQuery.Compile((MyContext.dataContext db,     long idCountry) =>
             from a in db.Countries where a.idCountry == idCountryselect a);

但不在“Devart Entity Model”中，因为 edml 是“ObjectContext”，lqml 是“DataContext”

提前致谢，

原文

For Compiled Queries, In LINQ to Object Entity FrameWork basically it allows the queries to compile at one time and then it can be re-used without compiling another time.

For Example:

using System.Data.Objects;
public static Func<entity, string, IQueryable<Entity>>
    TestQuery = CompiledQuery.Compile((entity db, string param) =>
        from e in ctx.Entities where e.Field == param select e);

My question is for LINQ to Devart Entity FrameWork , unable to pass the entity . cos it allows only datacontext as a valid parameter.

Please suggest me how to convert the linq to devart entity framework(edml) for Compiled Queries.

NOTE: it working fine in "Devart LinqConnect Model(lqml)"
For example :

 public static Func<MyContext.dataContext , long,
             IQueryable<EMyContext.dataContext.tableName>>
           shopByCountry = CompiledQuery.Compile((MyContext.dataContext db,     long idCountry) =>
             from a in db.Countries where a.idCountry == idCountryselect a);

but not in "Devart Entity Model" since edml is "ObjectContext" , lqml is "DataContext"

Thanks in Advance,

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