在MVC c#中准备自定义json格式返回

Question

我有两个类，即Module 类中的Roles 和Module 我有两个属性Name,Permission。

现在，只是为了测试目的，我正在创建一个演示代码。

类文件

    public class Roles
    {
        public Module[] modules { get; set; }
        public Roles()
        {
            modules = new Module[] { };
        }
    }

    public class Module
    {
        public string Name { get; set; }
        public string[] Permission { get; set; }
    }

控制器代码

public ActionResult Index()
{   
    var oRoles = new Roles();
    oRoles.modules = new Module[] {
        new Module(){
            Name="Page-Profile",
            Permission=new string[]{ "Edit","View","Delete"}
        },
        new Module(){
            Name="User",
            Permission=new string[]{ "Edit","View","Delete","Update"}
        }
    };
    var json = Newtonsoft.Json.JsonConvert.SerializeObject(oRoles);
    return View(json);
}

效果很好，我也得到了结果，但我想要这样的结果。

预期结果。

{
  "modules": [
    {
      "Page-Profile": [
        "Edit",
        "View",        
        "Delete"
      ]
    },
    {
      "User": [
        "Edit",
        "View",
        "Update",
        "Delete"
      ]
    }
  ]
}

目前我得到这样的结果。 is there any way to modify JSON remove all key and get only values.

{
  "modules": [
    {
      "Name": "Page-Profile",
      "Permission": [
        "Edit",
        "View",
        "Delete"
      ]
    },
    {
      "Name": "User",
      "Permission": [
        "Edit",
        "View",
        "Delete",
        "Update"
      ]
    }
  ]
}

注意：如何删除我只想要名称值和名称value 的关键属性，我不想在excpected result 中提到所有permission。

Answer 1

它对我有用，试试这个：

代码

public class Roles
{
    public Roles()
    {   
        modules = new List<Dictionary<string, List<string>>>();
    }

    public List<Dictionary<string, List<string>>> modules { get; set; }
}



/*Index*/
public ActionResult Index()
{
    var oRoles = new Roles();   
    var userRolePermissionsAndModulesList =  userRolePermissionManager.GetAllUserRolePermissionsAndModules(userId);

    foreach (var module in userRolePermissionsAndModulesList)
    { 
        var objPermissionWithModules = new Dictionary<string, List<string>>();
        var permission = new List<string> { };

        if (module.CanCreate)
        permission.Add("Create");
        if (module.CanDelete)
        permission.Add("Delete");
        if (module.CanEdit)
        permission.Add("Update");
        if (module.CanView)
        permission.Add("View");

        objPermissionWithModules.Add(module.ModuleName, permission);
        oRoles.modules.Add(objPermissionWithModules);
    } 

    var json = Newtonsoft.Json.JsonConvert.SerializeObject(oRoles);

    return View(json);
}

请比较你的输出：

{
   "modules":[
      {
         "Page-Profile":[
            "Edit",
            "View",
            "Delete"
         ]
      },
      {
         "user":[
            "Edit",
            "View",
            "Delete",
            "Update"
         ]
      }
   ]
}

Answer 2

删除 Module 类并尝试如下更改 Roles 以获得预期的 json 格式：

    public class Roles
    {
        public Roles()
        {
            modules = new Dictionary<string, List<string>>();
        }
        public Dictionary<string, List<string>> modules { get; set; }
    }

控制器动作代码：

public ActionResult Index()
{   
    var oRoles = new Roles();
    oRoles.modules.Add("Page-Profile", new List<string>{"Edit","View","Delete"});
    oRoles.modules.Add("user", new List<string>{"Edit","View","Delete","Update"});
    // Not sure why you are serializing to json. 
    // you can directly return View(oRoles) or PartialView(oRoles)
    var json = Newtonsoft.Json.JsonConvert.SerializeObject(oRoles);
    return View(json);
}

Answer 3

有两种实现方式

1. 通过编写自定义转换器
2. 通过更改 Roles 对象

通过编写自定义转换器

您可以按如下方式实现 CustomJsonConverter，将名称转换为键并将权限转换为值：

public class FlatternKeysConverter : JsonConverter
{
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        Module o = (Module)value;
        JObject newObject = new JObject(new JProperty(o.Name, o.Permission));
        newObject.WriteTo(writer);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        throw new NotImplementedException("Unnecessary because CanRead is false. The type will skip the converter.");
    }

    public override bool CanRead
    {
        get { return false; }
    }

    public override bool CanConvert(Type objectType)
    {
        return true;
    }
}

并将JsonConverter 附加为

[JsonConverter(typeof(FlatternKeysConverter))]
public class Module
{
    public string Name { get; set; }
    public string[] Permission { get; set; }
}

生成的 JSON 如下：

{"modules":[{"Page-Profile":["Edit","View","Delete"]},{"User":["Edit","View","Delete","Update"]}]}

通过更改 Roles 对象

将角色对象更改为字典

public class Role
{
    public class Roles
    {
        public Dictionary<string, List<string>> Modules {get; set;}
    }
}

您可以查看https://dotnetfiddle.net/Hs3i04 dotnet fiddle，它显示了这两种方法。