Web API 2 Json 以小写和下划线输出

Question

在将以下 JsonFormatter 的 ContractResolver 配置从 PascalCase（默认）转换为驼峰式后，我得到以下 Json 驼峰式输出。

但是，我更喜欢在 小写和下划线 中实现 Json 输出（大写应替换为下划线）。有任何想法吗？ :)

protected void Application_Start()
{
    GlobalConfiguration.Configure(WebApiConfig.Register);

    EnableCamelCase();
}

private void EnableCamelCase()
{
    HttpConfiguration config = GlobalConfiguration.Configuration;
    config.Formatters.JsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
    config.Formatters.JsonFormatter.UseDataContractJsonSerializer = false;
}

Class 属性

public int MenuId { get; set; }
public byte TypeId { get; set; }
public string MenuName { get; set; }
public string Description { get; set; }
public string Tooltip { get; set; }
public byte? Minimum { get; set; }
public byte? Maximum { get; set; }
public bool CanMultiSelect { get; set; }
public byte SortOrder { get; set; }

驼峰式大小写Json输出

"items": [
    {
      "menuId": 82,
      "typeId": 1,
      "menuName": "dsf",
      "description": "sdafsdafsd",
      "tooltip": null,
      "minimum": null,
      "maximum": null,
      "canMultiSelect": false,
      "sortOrder": 0
    },
    {
      "menuId": 83,
      "typeId": 1,
      "menuName": "sdfad",
      "description": "fsdfda",
      "tooltip": null,
      "minimum": null,
      "maximum": null,
      "canMultiSelect": false,
      "sortOrder": 0
    }
]}

首选输出

"items": [
    {
      "menu_id": 82,
      "type_id": 1,
      "menu_name": "dsf",
      "description": "sdafsdafsd",
      "tooltip": null,
      "minimum": null,
      "maximum": null,
      "can_multi_select": false,
      "sort_order": 0
    },
    {
      "menu_id": 82,
      "type_id": 1,
      "menu_name": "dsf",
      "description": "sdafsdafsd",
      "tooltip": null,
      "minimum": null,
      "maximum": null,
      "can_multi_select": false,
      "sort_order": 0
    }
]}

Answer 1

您需要创建一个继承自 DefaultContractResolver 的自定义 ContractResolver。参见 the Newtonsoft documentation。然后，您可以循环 属性 名称中的字符并插入下划线/根据需要使字符小写。