ASP.net Web API - 将数组名称添加到输出

Question

我试图从Web API更改json输出.假设我有像People这样的对象,当前的输出将是:

[{name:"John", sex:"M"},{name:"Simon", sex:"M"}]

但是我希望输出如下:

{"people":[{name:"John", sex:"M"},{name:"Simon", sex:"M"}]}

关于如何做到这一点的任何想法？

Answer 1

选项1 - 创建新模型

而不是返回

public IEnumerable<Person> Get()

返回

public People Get()

哪里

public class People {
    public IEnumerable<Person> People {get; set;}
}

选项2 - 返回动态

而不是返回

public IEnumerable<Person> Get()

返回

public dynamic Get() {
    IEnumerable<Person> p = //initialize to something;
    return new {people = p};
}

选项3 - 修改JsonMediaTypeFormatter

你仍然可以回来

public IEnumerable<Person> Get()

但添加以下类:

public class PeopleAwareJsonMediaTypeFormatter : JsonMediaTypeFormatter
{
    public override System.Threading.Tasks.Task WriteToStreamAsync(Type type, object value, System.IO.Stream writeStream, HttpContent content, TransportContext transportContext)
    {
        if ((typeof (IEnumerable<People>).IsAssignableFrom(type)))
        {
            value = new {people = value};
        }
        return base.WriteToStreamAsync(type, value, writeStream, content, transportContext);
    }
}

现在在WebApiConfig中只注册新的格式化程序而不是旧的JSON格式化程序:

config.Formatters.RemoveAt(0);
config.Formatters.Insert(0, new PeopleAwareMediaTypeFormatter());