在C#中创建json的最快方法

Question

我有一个数据样本,如下所示.

{
    "ditems": [
        {
            "type": "ditem",
            "name": "webmet.com",
            "ditem": 0,
            "links": [
                "www.abc.com/a",
                "www.sempo.org/"
                ]
        },
        {
            "type": "ditem",
            "name": "webmet.com/who-we-are/careers",
            "ditem": 2,
            "links": [
                "http://www.tele12.com/about",
                "http://tele12.com/life-at-teletech-en-US/about-teletech/"
            ]
        }
    ],
    "themes": [
        {
            "type": "theme",
            "name": "http://searchm.com/isr/agenda",
            "description": "",
            "slug": "http://searchm.com/isr/agenda-2"
        },
        {
            "type": "theme",
            "name": "http://www.sempo.org/",
            "description": "",
            "slug": "http://www.sempo.org/-2"
        }

    ]
}

这是我的代码

 var InternalURLList = dtInternalURL.AsEnumerable().Select(c => c.Field<string>("URL")).Distinct().ToList();

            StringBuilder sb = new StringBuilder();
            StringBuilder ThemeSb = new StringBuilder();
            sb.Append("{\"ditems\":[");

            if (InternalURLList.Count > 0)
            {
                for (int i = 0; i < InternalURLList.Count; i++)
                {
                    var ExternalDomainList = GetExternalDomain(Domain_ID, InternalURLList[i]).AsEnumerable().Select(c => c.Field<string>("ExternalDomain")).Distinct().ToList();                   
                    sb.Append("{\"type\":\"ditem\",");
                    sb.Append("\"name\":");
                    sb.Append("\"" + InternalURLList[i] + "\",");
                    sb.Append("\"ditem\":" + i + ",");
                    sb.Append("\"links\":[");
                    if (ExternalDomainList.Count > 0)
                    {
                        for (int j = 0; j < ExternalDomainList.Count; j++)
                        {
                            sb.Append("\"" + ExternalDomainList[j] + "\"");
                             sb.Append((j != ExternalDomainList.Count - 1) ? "," : "]") ;
                        }
                    }
                    else
                    {
                        sb.Append("]");
                    }
                    sb.Append("}");
                    sb.Append((i != InternalURLList.Count - 1)?",":"]");
                }
            }
            else
            {
                sb.Append("]");
                sb.Append(",");
            }

            DataTable dtDistinctDomain = GetDistinctExtDomain(Domain_ID);
            var ExternalDomain = dtDistinctDomain.AsEnumerable().Select(c => c.Field<string>("ExternalDomain")).Distinct().ToList();
            ThemeSb.Append(",\"themes\":[");
            for (int i = 0; i < ExternalDomain.Count; i++)
            {
                // For theme
                ThemeSb.Append("{\"type\":\"theme\",");
                ThemeSb.Append("\"name\":\"" + ExternalDomain[i] + "\",");
                ThemeSb.Append("\"description\":\"\",");
                ThemeSb.Append("\"slug\":\"" + ExternalDomain[i] + "-2" + "\"}");
                ThemeSb.Append((i != ExternalDomain.Count - 1)?",":"]");
            }
            ThemeSb.Append("}");
            string ConceptMapTheme = ThemeSb.ToString() ;
            string ConceptMapJSON = sb.ToString()+ThemeSb.ToString();
            return ConceptMapJSON;

我正在尝试使用C#制作json StringBuilder.该for循环花费过多时间来生成JSON.该表包含超过2,00,000条记录.如何使用C#以最快的方式创建json？

Answer 1

您可以在项目中添加Newtonsoft.Json nuget包.然后你只需要调用序列化器:

var jsonString = JsonConvert.SerializeObject(objectToSerialize);