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sunkaixuan
2022-04-10 01:00:14 +08:00
parent eb85b980ee
commit 1547774c51
1 changed files with 18 additions and 0 deletions
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18
Src/Asp.Net/SqlServerTest/Demo/Demo1_Queryable.cs
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@@ -341,6 +341,24 @@ namespace OrmTest
itemModel.Items = allItems.Where(it => it.OrderId==itemModel.Id).ToList();//Every time it's executed
}).ToList();
//无限级高性能导航映射
var treeRoot=db.Queryable<Tree>().Where(it => it.Id == 1).ToList();
db.ThenMapper(treeRoot, item =>
{
item.Child = db.Queryable<Tree>().SetContext(x => x.ParentId, () => item.Id, item).ToList();
});
db.ThenMapper(treeRoot.SelectMany(it=>it.Child), it =>
{
it.Child = db.Queryable<Tree>().SetContext(x => x.ParentId, () => it.Id, it).ToList();
});
db.ThenMapper(treeRoot.SelectMany(it => it.Child).SelectMany(it=>it.Child), it =>
{
it.Child = db.Queryable<Tree>().SetContext(x => x.ParentId, () => it.Id, it).ToList();
});
db.ThenMapper(treeRoot.SelectMany(it => it.Child).SelectMany(it => it.Child).SelectMany(it => it.Child), it =>
{
it.Child = db.Queryable<Tree>().SetContext(x => x.ParentId, () => it.Id, it).ToList();
});
Console.WriteLine("#### End Start ####");
}