如果我有一个公司集合，其中包含嵌入的部门：

If I have a Company collection which contains embedded Divisions:

{ 
  "_id": 1 
  "_t": "Company", 
  "Name": "Test Company" 
  "Divisions": [ 
    { 
       "_id": 1 
       "_t": "Division", 
       "Name": "Test Division 1" 
    }, 
    { 
       "_id": 2 
       "_t": "Division", 
       "Name": "Test Division 2" 
    } 
  ] 
} 

什么是使用官方10gen公司的C＃的驱动程序？ （最新的0.9版本。）

What is the best way to save/update an entire Division when using the official 10gen C# driver? (The latest 0.9 release.)

我用Update.AddToSetWrapped添加部门，而且工作得很好，但我也希望能够根据他们的_id更新文件。

I'm using Update.AddToSetWrapped to add Divisions, and that works fine, but I'd also like to be able to update documents depending on their _id.

例如，如果我定义了以下更新方法：

For example, if I define the following Update method:

public void UpdateDivision(IDivision division) 
{ 
  var mongo = MongoServer.Create(_connectionString); 
  var database = mongo.GetDatabase(_databaseName); 
  var query = Query.EQ("_id", division.CompanyId); 
  var update = Update.AddToSetWrapped("Divisions", division); 
  database.GetCollection<Company>("Company") 
          .Update(query, update, UpdateFlags.Upsert, SafeMode.True); 
} 

和调用它像这样：

var division = GetDivisionById(1); 
division.Name = "New Name"; 
UpdateDivision(division);

司然后一个新的实例将被添加到该组，因为虽然_id仍然是1，该名称是不同的，因此，它是一个唯一的文档。

Then a new instance of Division will be added to the set, because although the "_id" is still 1, the Name is different, and therefore it is a unique document.

那么，什么是有更新整个嵌入式文档的好办法？

So what is there a good way to update a whole embedded document?

直到我想出了一个更好的解决办法，我要第一个 $拉原处，然后 $ addToSet 与修改后的部门。这工作，但显然是不理想的，因为它会执行两个独立的更新。

Until I come up with a better solution I am going to first $pull the original Division and then $addToSet with the modified Division. That works but is obviously not ideal as it performs two separate updates.

推荐答案

您可以使用的MongoDB的位置阵列修改功能一次更新数组中的一个整师如下：

You could use the positional array modification feature of MongoDB to update an entire division in the array at once as follows:

var division = GetDivisionById(1);
division.Name = "New Name";
// change any other properties of division you want
collection.Update(
    Query.EQ("Divisions._id", 1),
    Update.Set("Divisions.$", BsonDocumentWrapper.Create<IDivision>(division))
);

关键的东西怎么回事是：

The key things going on here are: