c# json數組動態欄位名

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根據給定的列名動態產生json數組

List<string> cols = new List<string>() { "姓名","性別","年齡"};

1.使用JArray,JObject對象

//JObject            JArray arr = new JArray();            JObject obj = new JObject();            foreach (var col in cols)            {                obj[col] = col + "_test";            }            arr.Add(obj);            //獲得對象的所有欄位名            var itemProperties = ((JObject)arr[0]).Properties().ToList();            foreach (var item in itemProperties)            {                var v = item.Name+":"+item.Value;            }            string json1 = JsonEncode(arr);

2.使用Datatable

//Datatable            DataTable dt = new DataTable();            var row = dt.NewRow();            foreach (var col in cols)            {                dt.Columns.Add(col);                row[col] = col + "_test";            }            dt.Rows.Add(row);            string json2 = JsonEncode(dt);            //var colName=dt.Columns[0].ColumnName;

 

3.使用Dynamic對象

//Dynamic http://www.cnblogs.com/xuejianxiyang/p/4964739.html            dynamic dobj = new System.Dynamic.ExpandoObject();            var dic = (IDictionary<string, object>)dobj;            foreach (var col in cols)            {                dic[col] = col + "_test";              }            foreach (var fieldItem in (IDictionary<String, Object>)dobj)            {//獲得對象的所有欄位名                var v = (fieldItem.Key + ": " + fieldItem.Value);            }            List<System.Dynamic.ExpandoObject> list = new List<System.Dynamic.ExpandoObject>();            list.Add(dobj);            string json3 = JsonEncode(list);

 

public static string JsonEncode<T>(T jsonstruct, bool withIndentFormat = true)
{
//var setting=new JsonSerializerSettings();
//setting.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;

Formatting format = Formatting.Indented;
if (!withIndentFormat)
{
format = Formatting.None;
}

return JsonConvert.SerializeObject(jsonstruct, format,
new JsonSerializerSettings()
{
ReferenceLoopHandling = ReferenceLoopHandling.Ignore,
PreserveReferencesHandling = PreserveReferencesHandling.None
});

 

}

 

From:http://www.cnblogs.com/xuejianxiyang/p/6639610.html

c# json數組動態欄位名