json - [DisplayFormat(ConvertEmptyStringToNull = false)] 的 Json 错误

Question

我在vs2013中写了一个mvc5项目

控制器中的方法返回 json

public JsonResult QueryConcens(ConcentratorView concenForQuery)
{
    QueryConcentratorsRequest request = new QueryConcentratorsRequest() { ConcenQuery = concenForQuery };

    return
        Json
        (
            concenstratorService
            .QueryConcentrators(request)
            .ConcensView
        );
} 

模型是

public class ConcentratorView
{
    [Required(ErrorMessage="please input id")]
    public string ConcentratorID { get; set; }

    public string Name { get; set; }

    public string Address { get; set; }
}

它返回：

[{"ConcentratorID":"43","Name":"345","Address":"345"},
{"ConcentratorID":"56","Name":"","Address":null},
{"ConcentratorID":"concen_123","Name":"wer","Address":null}]

我希望地址：null 为“”

然后我添加

[DisplayFormat(ConvertEmptyStringToNull = false)]
public string Address { get; set; }

但它返回

[{"ConcentratorID":"43","Name":"345","Address":"345"}]

它丢失了两行

为什么？