c# Json操作

Posted 2021-01-09 yuanzijian-ruiec

using System;
using System.Collections.Generic;
using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using System.Reflection;
using System.Data;
using Newtonsoft.Json.Linq;

namespace EasyFrame.Common
{
    /// <summary>
    /// Json操作
    /// </summary>
    public static class Json
    {

        public static string ToJson(this object obj, string datetimeformats)
        {
            var timeConverter = new IsoDateTimeConverter { DateTimeFormat = datetimeformats };
            return JsonConvert.SerializeObject(obj, timeConverter);
        }

        public static List<T> ToList<T>(this string Json)
        {
            return Json == null ? null : JsonConvert.DeserializeObject<List<T>>(Json);
        }
        public static DataTable ToTable(this string Json)
        {
            return Json == null ? null : JsonConvert.DeserializeObject<DataTable>(Json);
        }
        public static JObject ToJObject(this string Json)
        {
            return Json == null ? JObject.Parse("{}") : JObject.Parse(Json.Replace("&nbsp;", ""));
        }

        #region  值转换
        private static object convertVal(Type t, object data)
        {
            object val = null;
            if (t == typeof(Int32))
                val = Convert.ToInt32(data);
            else if (t == typeof(DateTime))
                val = Convert.ToDateTime(data);
            else if (t == typeof(Decimal))
                val = Convert.ToDecimal(data);
            else if (t == typeof(Boolean))
                val = Convert.ToBoolean(data);
            else if (t == typeof(String))
                val = Convert.ToString(data).Trim();
            else if (t == typeof(Guid))
                val = new Guid(data.ToString());
            else
                val = data;
            return val;
        }
        #endregion

        #region IToJson 成员
        public static string ToJson(object model)
        {
            if (model == null) return null;
            string value = JsonConvert.SerializeObject(model, new AspNetDateTimeConverter());
            return value;
        }
        public static string ToJson(System.Data.DataTable dt)
        {
            string value = JsonConvert.SerializeObject(dt);
            return value;
        }
        public static string ToJson(string data)
        {
            object[] objs = new object[] { data };
            return ToJson(objs);
        }
        public static string ToJson(int data)
        {
            object[] objs = new object[] { data };
            return ToJson(objs);
        }
        public static string ToJson(decimal data)
        {
            object[] objs = new object[] { data };
            return ToJson(objs);
        }
        public static string ToJson(bool data)
        {
            object[] objs = new object[] { data };
            return ToJson(objs);
        }
        public static string ToJson(DateTime data)
        {
            object[] objs = new object[] { data };
            return ToJson(objs);
        }
        public static string ToJson(params object[] data)
        {
            string value = JsonConvert.SerializeObject(data, new AspNetDateTimeConverter());
            return value;
        }

        #endregion

        #region IJsonToObject成员
        public static T ToObject<T>(string json)
        {
            return JsonConvert.DeserializeObject<T>(json);
        }
        public static object ToObject(string json)
        {
            return JsonConvert.DeserializeObject(json);
        }
        public static object[] ToArray(string json)
        {
            return (ToObject(json) as JArray).ToArray();
        }
        public static string ToString(string json)
        {
            return Convert.ToString(ToArray(json)[0]);
        }
        public static bool ToBoolean(string json)
        {
            return Convert.ToBoolean(ToArray(json)[0]);
        }
        public static int ToInt32(string json)
        {
            return Convert.ToInt32(ToArray(json)[0]);
        }
        public static decimal ToDecimal(string json)
        {
            return Convert.ToDecimal(ToArray(json)[0]);
        }
        public static DateTime ToDateTime(string json)
        {
            return Convert.ToDateTime(ToArray(json)[0]);
        }

        public static T ToObject<T>(object data)
        {
            if (typeof(T).Equals(typeof(int[])))
            {
                List<int> intvals = new List<int>();
                for (int i = 0; i < (data as JArray).Count; i++)
                {
                    intvals.Add(Convert.ToInt32((data as JArray)[i]));
                }
                return (T)(intvals.ToArray() as object);
            }
            else if (typeof(T).Equals(typeof(string[])))
            {
                List<string> intvals = new List<string>();
                for (int i = 0; i < (data as JArray).Count; i++)
                {
                    intvals.Add(Convert.ToString((data as JArray)[i]));
                }
                return (T)(intvals.ToArray() as object);
            }



            else if (typeof(T).Equals(typeof(decimal[])))
            {
                List<decimal> intvals = new List<decimal>();
                for (int i = 0; i < (data as JArray).Count; i++)
                {
                    intvals.Add(Convert.ToDecimal((data as JArray)[i]));
                }
                return (T)(intvals.ToArray() as object);
            }
            else if (typeof(T).Equals(typeof(Boolean[])))
            {
                List<Boolean> intvals = new List<Boolean>();
                for (int i = 0; i < (data as JArray).Count; i++)
                {
                    intvals.Add(Convert.ToBoolean((data as JArray)[i]));
                }
                return (T)(intvals.ToArray() as object);
            }
            else if (typeof(T).Equals(typeof(DateTime[])))
            {
                List<DateTime> intvals = new List<DateTime>();
                for (int i = 0; i < (data as JArray).Count; i++)
                {
                    intvals.Add(Convert.ToDateTime((data as JArray)[i]));
                }
                return (T)(intvals.ToArray() as object);
            }
            else if (typeof(T).Equals(typeof(object[])))
            {
                List<object> intvals = new List<object>();
                for (int i = 0; i < (data as JArray).Count; i++)
                {
                    intvals.Add((data as JArray)[i]);
                }
                return (T)(intvals.ToArray() as object);
            }
            else
            {
                T obj = (T)Activator.CreateInstance(typeof(T));
                PropertyInfo[] pros = typeof(T).GetProperties();
                var oldinttype = typeof(Nullable<int>);
                var olddectype = typeof(Nullable<decimal>);
                var olddoutype = typeof(Nullable<double>);
                var oldbooltype = typeof(Nullable<Boolean>);
                var newinttype = typeof(int);
                var newdectype = typeof(decimal);
                var newdoutype = typeof(double);
                var newbooltype = typeof(Boolean);
                for (int k = 0; k < pros.Length; k++)
                {
                    object val;
                    if (pros[k].PropertyType.Equals(oldinttype))
                    {
                        if (pros[k].Name == null)
                            val = default(int);
                        else
                            val = convertVal(newinttype, (data as JObject)[pros[k].Name]);
                    }
                    else if (pros[k].PropertyType.Equals(olddectype))
                    {
                        if (pros[k].Name == null)
                            val = default(decimal);
                        else
                            val = convertVal(newdectype, (data as JObject)[pros[k].Name]);
                    }
                    else if (pros[k].PropertyType.Equals(olddoutype))
                    {
                        if (pros[k].Name == null)
                            val = default(double);
                        else
                            val = convertVal(newdoutype, (data as JObject)[pros[k].Name]);
                    }
                    else if (pros[k].PropertyType.Equals(oldbooltype))
                    {
                        if (pros[k].Name == null)
                            val = default(bool);
                        else
                            val = convertVal(newbooltype, (data as JObject)[pros[k].Name]);
                    }
                    else
                    {
                        val = convertVal(pros[k].PropertyType, (data as JObject)[pros[k].Name]);
                    }
                    pros[k].SetValue(obj, val, null);
                }
                return obj;
            }
        }
        public static object[] ToArray(object data)
        {
            return (data as JArray).ToArray();
        }
        public static List<T> ToListObj<T>(object data)
        {
            if (data is JArray)
            {
                PropertyInfo[] pros = typeof(T).GetProperties();
                List<T> list = new List<T>();
                for (int i = 0; i < (data as JArray).Count; i++)
                {
                    T obj = (T)Activator.CreateInstance(typeof(T));
                    object _data = (data as JArray)[i];
                    for (int k = 0; k < pros.Length; k++)
                    {
                        object val = convertVal(pros[k].PropertyType, (_data as JObject)[pros[k].Name]);
                        pros[k].SetValue(obj, val, null);
                    }
                    list.Add(obj);
                }
                return list;
            }

            return null;
        }
        public static DataTable ToDataTable(object data)
        {
            if (data is JArray && (data as JArray).Count > 0)
            {
                JObject _data = (data as JArray)[0] as JObject;
                DataTable dt = new DataTable();
                foreach (var name in _data)
                {
                    dt.Columns.Add(name.Key, _data[name.Key].GetType());
                }

                for (int i = 0; i < (data as JArray).Count; i++)
                {
                    object _jsarray = (data as JArray)[i];
                    DataRow dr = dt.NewRow();
                    for (int k = 0; k < dt.Columns.Count; k++)
                    {
                        dr[k] = convertVal(dt.Columns[k].DataType, (_jsarray as JObject)[dt.Columns[k].ColumnName]);
                    }
                    dt.Rows.Add(dr);
                }

                return dt;
            }
            return null;
        }
        public static DataTable ToDataTable(string data)
        {
            return ToDataTable(JsonConvert.DeserializeObject(data));
        }
        #endregion
    }


    public class AspNetDateTimeConverter : javascriptDateTimeConverter
    {
        public override bool CanConvert(Type objectType)
        {
            return typeof(DateTime).IsAssignableFrom(objectType);
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            DateTime datetime = Convert.ToDateTime(value);
            writer.WriteValue(datetime.ToString("yyyy-MM-dd HH:mm:ss"));
        }
    }

}