EntityFramework Stored Proc Function Import 是否可以异步读取? [英] EntityFramework Stored Proc Function Import is it possible to read async?

问题描述

我使用的是 EF 6.1.1 和 Database First.当我将存储过程导入 edmx 并生成 DBContext 时，它看起来像这样:

I'm using EF 6.1.1 and Database First. When I import a stored proc into the edmx and generate the DBContext it looks like this:

return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<TestSP_Result>("TestSP", params[]...)

返回一个 ObjectResult

T>，实现IDbAsyncEnumerable 所以我这样做是为了异步读取数据:

That returns an ObjectResult< T >, which implements IDbAsyncEnumerable< T > so I'm doing this to read the data async:

 IDbAsyncEnumerable<T> enumerable = objectResult as IDbAsyncEnumerable<T>;
 IDbAsyncEnumerator<T> enumerator = enumerable.GetAsyncEnumerator();
 List<T> list = new List<T>();
 bool moreItems = await enumerator.MoveNextAsync(CancellationToken.None);

 while (moreItems)
 {
     list.Add(enumerator.Current);
     moreItems = await enumerator.MoveNextAsync(CancellationToken.None);
 }
 return list;

这真的是异步读取数据吗?我附加了分析器，实际的 SQL 语句在 ExecuteFunction 行中运行，而不是在枚举结果时.

Is this really reading the data asynchronously? I attached the profiler and the actual SQL statement runs in the ExecuteFunction line, not when enumerating the results.

是否有合适的方法从 DBContext 运行存储过程并异步读取结果?

Is there a proper way to run a stored proc from the DBContext and read the results asynchronously?

推荐答案

我是怎么做到的:

var results = await ctx.Database.SqlQuery<TResult>("EXEC sp_foo {0}, {1}", p1, p2)
                  .ToArrayAsync();

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