将对象列表序列化为没有父对象名称的 JSON答案

【问题标题】：Serialize objects list to JSon without Parent object name将对象列表序列化为没有父对象名称的 JSON
【发布时间】：2019-03-01 06:52:19
【问题描述】：

我有对象列表并在我的 MVC 应用程序中使用下面的代码输出它们。

 public JsonResult ConversionInfo(string srcFormat)
        {
            return Json(MetadataDbService.FindBySourceFormat(srcFormat).Select(m => new
            {
                m.ConversionMeta
            }), JsonRequestBehavior.AllowGet);
        }

代码产生这样的结果。每行/项目都以父对象名称 ConversionMeta 开头。

[
{"ConversionMeta":{"Id": "delete", "Name": "delete page from PDF", "Description": "You can delete any page from PDF blah blah...",…}},
{"ConversionMeta":{"Id": "delete", "Name": "delete page from PDF", "Description": "You can delete any page from PDF blah blah...",…}}
]

我想要这样的结果，有什么想法可以修改代码吗？

[
{"Id": "delete", "Name": "delete page from PDF", "Description": "You can delete any page from PDF blah blah...",…},
{"Id": "delete", "Name": "delete page from PDF", "Description": "You can delete any page from PDF blah blah...",…}
]

【问题讨论】：

标签： c# json asp.net-mvc-4

【解决方案1】：

通过使用new { } 选择对象，您将对象包装在包装对象中。

放弃new { } 包装器，并选择ConversionMeta 属性本身。

public JsonResult ConversionInfo(string srcFormat)
{
    return Json(MetadataDbService.FindBySourceFormat(srcFormat).Select(m => m.ConversionMeta), JsonRequestBehavior.AllowGet);
}

【讨论】：

【解决方案2】：

我建议创建一个包含所有属性的类，并使用 JSON.NET 将该类序列化为 json

您可以通过 Nuget 安装 JSON.NET

PM> Install-Package Newtonsoft.Json

创建一个类的数组并用你的所有条目填充它

然后就可以使用JsonConvert.SerialzeObject方法来创建Json了

这是我的代码：

static void Main(string[] args)
{
    ConversionMeta[] conversionMetaArray = new ConversionMeta[3];
    conversionMetaArray[0] = new ConversionMeta()
    {
        Id = "deleted",
        Name = "delete page from PDF",
        Description = "You can delete any page from PDF blah blah..."
    };
    conversionMetaArray[1] = new ConversionMeta()
    {
        Id = "deleted",
        Name = "delete page from PDF",
        Description = "You can delete any page from PDF blah blah..."
    };
    conversionMetaArray[2] = new ConversionMeta()
    {
        Id = "deleted",
        Name = "delete page from PDF",
        Description = "You can delete any page from PDF blah blah..."
    };

    string json = JsonConvert.SerializeObject(conversionMetaArray);
}

这是课程：

class ConversionMeta
{
    public string Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
}

这是输出：

[
{"Id":"deleted","Name":"delete page from PDF","Description":"You can delete any page from PDF blah blah..."},
{"Id":"deleted","Name":"delete page from PDF","Description":"You can delete any page from PDF blah blah..."},
{"Id":"deleted","Name":"delete page from PDF","Description":"You can delete any page from PDF blah blah..."}
]

【讨论】：