不区分大小写的属性映射 [英] Case insensitive property mapping

问题描述

将MongoDB文档序列化为POCO时，有什么方法可以使属性映射不区分大小写?例如，我想要这份文件:

When serializing a MongoDB document to a POCO is there any way to make properties map case insensitive? For example I'd like this document:

{
    "id": "1"
    "foo": "bar"
}

以映射到此类:

public MyObj
{
    public int Id {get; set;}
    public string Foo {get; set;}
}

推荐答案

为此，我认为您将有2个选择.

To do that I think you will have 2 options.

第一个方法是手动编写一个类映射

The first would be to write out a class map manually

BsonClassMap.RegisterClassMap<MyClass>(cm => {
    cm.AutoMap();
    cm.GetMemberMap(c => c.Foo).SetElementName("foo");
});

第二个方法是使用以下属性装饰您的类

The second would be to decorate your class with the following attributes

public class MyObj
{
    [BsonElement("id")]
    public int Id { get; set; }

    [BsonElement("foo")]
    public string Foo { get; set; }
}

CSharp驱动程序团队在以下链接上有一个很好的序列化教程

The CSharp driver team have a good tutorial on serialization on the following link

http://docs.mongodb.org /ecosystem/tutorial/serialize-documents-with-the-csharp-driver/

我刚刚尝试了以下内容，并且对我有用，显然，我确定这是您代码的简化版本，但您可以猜测一下它的外观.

I have just tried the following and this works for me, obviously I'm sure this is a much more simplified version of your code but taking a guess at how it might look.

我已经分别注册了两个类映射，并将BsonKnownType添加到基类.

I have registered the two class maps separately and added the BsonKnownType to the base class.

[BsonKnownTypes(typeof(GeoJSONObject))]
public class Point
{
    public string Coordinates { get; set; }
}

public class GeoJSONObject : Point
{
    public string Type { get; set; }
}

static void Main(string[] args)
{
    var cn = new MongoConnectionStringBuilder("server=localhost;database=MyTestDB;");
    var settings = MongoClientSettings.FromConnectionStringBuilder(cn);
    var client = new MongoClient(settings);

    BsonClassMap.RegisterClassMap<Point>(cm =>
    {
        cm.AutoMap();
        cm.GetMemberMap(c => c.Coordinates).SetElementName("coordinates");                   
    });

    BsonClassMap.RegisterClassMap<GeoJSONObject>(cm =>
    {
        cm.AutoMap();
        cm.GetMemberMap(c => c.Type).SetElementName("type");
    });

    var result = client.GetServer()
              .GetDatabase("MyTestDB")
              .GetCollection("MyCol")
              .Find(Query.EQ("type", BsonValue.Create("xxxx")));
}

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