在C#中创建JSON数组

Question

好的,所以我试图通过http连接发送POST命令,并使用JSON格式来执行此操作.我正在编写程序在C#中执行此操作,并想知道如何格式化要作为JSON传递给服务器的值数组.

目前我有这个:

new {name = "command" , index = "X", optional = "0"}

这在JSON中转换为:

"name": "command",
"index": "X",
"optional": "0"

我想创建一个名为items的数组,其中每个元素都包含这三个值.所以它本质上是一个对象数组,其中对象包含名称,索引和可选字段.

我的猜测是,这将是这样的:

new {items = [(name = "command" , index = "X", optional = "0"), 
              (name = "status" , index = "X", optional = "0")]}

如果它是正确的语法,将在JSON中转换为this:

"items": 
[
    {
        "name": "command",
        "index": "X",
        "optional": "0"
    },
    {
        "name": "status",
        "index": "X",
        "optional": "0"
    }
]

但是,显然我做错了.想法？任何帮助表示赞赏.

Answer 1

你很亲密 这应该做的伎俩:

new {items = new [] {
    new {name = "command" , index = "X", optional = "0"}, 
    new {name = "command" , index = "X", optional = "0"}
}}

如果您的源是某种类型的可枚举,您可能希望这样做:

new {items = source.Select(item => new 
{
    name = item.Name, index = item.Index, options = item.Optional
})};

Answer 2

您最好为每个项目创建一个类,而不是使用匿名对象.在对象中,你要序列化,你应该有这些项目的数组.例如:

public class Item
{
    public string name { get; set; }
    public string index { get; set; }
    public string optional { get; set; }
}

public class RootObject
{
    public List<Item> items { get; set; }
}

用法:

var objectToSerialize = new RootObject();
objectToSerialize.items = new List<Item> 
                          {
                             new Item { name = "test1", index = "index1" },
                             new Item { name = "test2", index = "index2" }
                          };

在结果中,如果需要更改数据结构,则不必多次更改内容.

ps 这是复杂jsons 的非常好的工具

Answer 3

此外,与匿名类型(我宁愿没有这样做) -这仅仅是另一种做法.

void Main()
{
    var x = new
    {
        items = new[]
        {
            new
            {
                name = "command", index = "X", optional = "0"
            },
            new
            {
                name = "command", index = "X", optional = "0"
            }
        }
    };
    JavaScriptSerializer js = new JavaScriptSerializer(); //system.web.extension assembly....
    Console.WriteLine(js.Serialize(x));
}

结果:

{"items":[{"name":"command","index":"X","optional":"0"},{"name":"command","index":"X","optional":"0"}]}