问题
I'm getting a JSON feed from Google's data API and a lot of the property names start with a $ character (dollar sign).
My problem is that I can't create a C# class with a variable name starting with a dollar sign, it's no allowed by the language. I'm using JSON.NET from Newtonsoft to convert JSON to C# objects. How can I get around this problem?
回答1:
You could try using the [JsonProperty] attribute to specify the name:
[JsonProperty(PropertyName = "$someName")]
public string SomeName { get; set; }
回答2:
firas489 was on the right track that $ indicates metadata, not an actual data field. However the fix is actually to do this:
JsonSerializerSettings settings = new JsonSerializerSettings();
settings.MetadataPropertyHandling = MetadataPropertyHandling.Ignore;
Set the metadata handling to ignore, and then you can serialize/deserialize the property using the PropertyName attribute:
[JsonProperty("$id")]
public string Id { get; set; }
回答3:
Those items with the dollar sign ($) are usually meant to be metadata and NOT fields. When JSON.NET serializes an object and you tell it to handle the object types, it will insert $ items that denotes metadata for correct deserialization later on.
If you want to treat the $ items as meta data, use JsonSerializerSettings. For example:
Dim jsonSettings As New Newtonsoft.Json.JsonSerializerSettings With {.TypeNameHandling = Newtonsoft.Json.TypeNameHandling.All}
Dim jsonOut As String = Newtonsoft.Json.JsonConvert.SerializeObject(objects, jsonSettings)
The TypeNameHandling = Newtonsoft.Json.TypeNameHandling.All tells JSON to handle the datatypes while relying on the $ for information.
Hope that helps..
来源：https://stackoverflow.com/questions/4638585/how-do-c-sharp-classes-deal-with-dollar-signs-in-json