C#格式化JSON字符串

 
很多时候我们需要将json字符串以

{

    "status": 1,

    "sum": 9

}
这种方式显示，而从服务端取回来的时候往往是这样
 {"status": 1, "sum": 9}
什么？无所谓？
如果数据很庞大的时候，比如这样
{"status":1,"totalcount":2,"list":[{"id":"2305b1e2-4e31-4fd3-8eb6-db57641914df","code":"8147056167227050270","title":"testing","type":"产品","status":"已处理","datetime":"2014-07-12T21:16:46","replycontent":"好的，只是测试"},{"id":"3a6546f6-49a7-4a17-b679-b3812b12b27e","code":"8147056167227050269","title":"我建议龙头有多种选配方式","type":"产品","status":"未处理","datetime":"2014-07-12T18:49:08.933","replycontent":""},{"id":"f735e461-ca72-4b44-8d7b-cd97ac09802f","code":"8147056167227050268","title":"这个产品不怎么好，不好用","type":"产品","status":"未处理","datetime":"2014-07-12T15:06:19.1","replycontent":""},{"id":"15926d9d-f469-4921-b01d-4b48ef8bd93d","code":"7141054273018032465","title":"jdjbcn","type":"服务","status":"未处理","datetime":"2014-05-27T01:03:46.477","replycontent":""},{"id":"1debf78f-42b3-4037-b71f-34075eed92bc","code":"4141051277003536211","title":"jdjbxn.x","type":"服务","status":"未处理","datetime":"2014-05-27T00:53:21.18","replycontent":""},{"id":"27593c52-b327-4557-8106-b9156df53909","code":"1143051276001357050","title":"ghggghh","type":"服务","status":"未处理","datetime":"2014-05-27T00:35:05.933","replycontent":""},{"id":"040198fc-b466-46c1-89d8-0514fbde9480","code":"4142053251166372433","title":"你好，你知道啦，我不喜欢白色浴缸","type":"服务","status":"未处理","datetime":"2014-05-25T16:37:43.853","replycontent":""},{"id":"16185418-d461-4e98-83c3-824eb7e344d6","code":"4145058213013197148","title":"hdjbchh","type":"服务","status":"未处理","datetime":"2014-05-21T01:19:14.903","replycontent":""},{"id":"6c043404-c1db-42e8-adeb-d4880fa7d1b5","code":"0142051185128085372","title":"ghhjdhd","type":"服务","status":"未处理","datetime":"2014-05-18T12:08:37.997","replycontent":""},{"id":"2dca1a38-a32b-4955-a99c-2ed7d6de60fa","code":"3146050186122030382","title":"hsibcn","type":"服务","status":"未处理","datetime":"2014-05-18T12:03:38.913","replycontent":""}]}
如果没有格式化，将很难查看。。。
使用下面的方法，将结果格式化为这样

{

    "status": 1,

    "totalcount": 2,

    "list": [

        {

            "id": "2305b1e2-4e31-4fd3-8eb6-db57641914df",

            "code": "8147056167227050270",

            "title": "testing",

            "type": "产品",

            "status": "已处理",

            "datetime": "2014-07-12T21:16:46",

            "replycontent": "好的，只是测试"

        },

        {

            "id": "3a6546f6-49a7-4a17-b679-b3812b12b27e",

            "code": "8147056167227050269",

            "title": "我建议龙头有多种选配方式",

            "type": "产品",

            "status": "未处理",

            "datetime": "2014-07-12T18:49:08.933",

            "replycontent": ""

        },

        {

            "id": "f735e461-ca72-4b44-8d7b-cd97ac09802f",

            "code": "8147056167227050268",

            "title": "这个产品不怎么好，不好用",

            "type": "产品",

            "status": "未处理",

            "datetime": "2014-07-12T15:06:19.1",

            "replycontent": ""

        },

        {

            "id": "15926d9d-f469-4921-b01d-4b48ef8bd93d",

            "code": "7141054273018032465",

            "title": "jdjbcn",

            "type": "服务",

            "status": "未处理",

            "datetime": "2014-05-27T01:03:46.477",

            "replycontent": ""

        },

        {

            "id": "1debf78f-42b3-4037-b71f-34075eed92bc",

            "code": "4141051277003536211",

            "title": "jdjbxn.x",

            "type": "服务",

            "status": "未处理",

            "datetime": "2014-05-27T00:53:21.18",

            "replycontent": ""

        },

        {

            "id": "27593c52-b327-4557-8106-b9156df53909",

            "code": "1143051276001357050",

            "title": "ghggghh",

            "type": "服务",

            "status": "未处理",

            "datetime": "2014-05-27T00:35:05.933",

            "replycontent": ""

        },

        {

            "id": "040198fc-b466-46c1-89d8-0514fbde9480",

            "code": "4142053251166372433",

            "title": "你好，你知道啦，我不喜欢白色浴缸",

            "type": "服务",

            "status": "未处理",

            "datetime": "2014-05-25T16:37:43.853",

            "replycontent": ""

        },

        {

            "id": "16185418-d461-4e98-83c3-824eb7e344d6",

            "code": "4145058213013197148",

            "title": "hdjbchh",

            "type": "服务",

            "status": "未处理",

            "datetime": "2014-05-21T01:19:14.903",

            "replycontent": ""

        },

        {

            "id": "6c043404-c1db-42e8-adeb-d4880fa7d1b5",

            "code": "0142051185128085372",

            "title": "ghhjdhd",

            "type": "服务",

            "status": "未处理",

            "datetime": "2014-05-18T12:08:37.997",

            "replycontent": ""

        },

        {

            "id": "2dca1a38-a32b-4955-a99c-2ed7d6de60fa",

            "code": "3146050186122030382",

            "title": "hsibcn",

            "type": "服务",

            "status": "未处理",

            "datetime": "2014-05-18T12:03:38.913",

            "replycontent": ""

        }

    ]

}

 这样就容易多了.代码没做错误处理，读者可自行更改

需要导入Newtonsoft.Json，这里使用的版本是4.5

 private string ConvertJsonString(string str)
        {
            //格式化json字符串
            JsonSerializer serializer = new JsonSerializer();
            TextReader tr = new StringReader(str);
            JsonTextReader jtr = new JsonTextReader(tr);
            object obj = serializer.Deserialize(jtr);
            if (obj != null)
            {
                StringWriter textWriter = new StringWriter();
                JsonTextWriter jsonWriter = new JsonTextWriter(textWriter)
                {
                    Formatting = Formatting.Indented,
                    Indentation = 4,
                    IndentChar = ' '
                };
                serializer.Serialize(jsonWriter, obj);
                return textWriter.ToString();
            }
            else
            {
                return str;
            }          
        }