Json操作类代码,Asp.Net代码库,德仔网

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【Asp.Net】 Json操作类
作者:Dezai.CN / 发布于2013/5/9/ 612
Json操作类，支持数组，DataTable，DataReader等转Json

	using System;
	using System.Data;
	using System.Text;
	using System.Collections.Generic;
	using System.Reflection;
	using System.Data.Common;
	using System.Collections;
	using System.Web.UI.WebControls;
	using System.Web.UI.HtmlControls;
	using System.IO;
	using System.Text.RegularExpressions;
	using System.Runtime.Serialization.Json;

	
	namespace System.Common
	{
	 public static class Json
	 {
	 /// <summary>
	 /// List转成json
	 /// </summary>
	 /// <typeparam name="T"></typeparam>
	 /// <param name="jsonName"></param>
	 /// <param name="list"></param>
	 /// <returns></returns>
	 public static string ListToJson<T>(IList<T> list, string jsonName)
	 {
	 StringBuilder Json = new StringBuilder();
	 if (string.IsNullOrEmpty(jsonName))
	 jsonName = list[0].GetType().Name;
	 Json.Append("{\"" + jsonName + "\":[");
	 if (list.Count > 0)
	 {
	 for (int i = 0; i < list.Count; i++)
	 {
	 T obj = Activator.CreateInstance<T>();
	 PropertyInfo[] pi = obj.GetType().GetProperties();
	 Json.Append("{");
	 for (int j = 0; j < pi.Length; j++)
	 {
	 Type type;
	 object o = pi[j].GetValue(list[i], null);
	 string v = string.Empty;
	 if (o != null)
	 {
	 type = o.GetType();
	 v = o.ToString();
	 }
	 else
	 {
	 type = typeof(string);
	 }

	 Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(v, type));

	 if (j < pi.Length - 1)
	 {
	 Json.Append(",");
	 }
	 }
	 Json.Append("}");
	 if (i < list.Count - 1)
	 {
	 Json.Append(",");
	 }
	 }
	 }
	 Json.Append("]}");
	 return Json.ToString();
	 }

	 /// <summary>
	 /// 序列化集合对象
	 /// </summary>
	 public static string JsonSerializerByArrayData<T>(T[] tArray)
	 {
	 DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T[]));
	 MemoryStream ms = new MemoryStream();
	 ser.WriteObject(ms, tArray);
	 string jsonString = Encoding.UTF8.GetString(ms.ToArray());
	 ms.Close();
	 string p = @"\\/Date\((\d+)\+\d+\)\\/";
	 MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);
	 Regex reg = new Regex(p);
	 jsonString = reg.Replace(jsonString, matchEvaluator);
	 return jsonString;
	 }

	 /// <summary>
	 /// 序列化单个对象
	 /// </summary>
	 public static string JsonSerializerBySingleData<T>(T t)
	 {
	 DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
	 MemoryStream ms = new MemoryStream();
	 ser.WriteObject(ms, t);
	 string jsonString = Encoding.UTF8.GetString(ms.ToArray());
	 ms.Close();
	 string p = @"\\/Date\((\d+)\+\d+\)\\/";
	 MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);
	 Regex reg = new Regex(p);
	 jsonString = reg.Replace(jsonString, matchEvaluator);
	 return jsonString;
	 }

	 /// <summary>
	 /// 反序列化单个对象
	 /// </summary>
	 public static T JsonDeserializeBySingleData<T>(string jsonString)
	 {
	 //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"\/Date(1294499956278+0800)\/"格式
	 string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}";
	 MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate);
	 Regex reg = new Regex(p);
	 jsonString = reg.Replace(jsonString, matchEvaluator);
	 DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
	 MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
	 T obj = (T)ser.ReadObject(ms);
	 return obj;
	 }

	 /// <summary>
	 /// 反序列化集合对象
	 /// </summary>
	 public static T[] JsonDeserializeByArrayData<T>(string jsonString)
	 {
	 //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"\/Date(1294499956278+0800)\/"格式
	 string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}";
	 MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate);
	 Regex reg = new Regex(p);
	 jsonString = reg.Replace(jsonString, matchEvaluator);
	 DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T[]));
	 MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
	 T[] arrayObj = (T[])ser.ReadObject(ms);
	 return arrayObj;
	 }

	 /// <summary>
	 /// 将Json序列化的时间由/Date(1294499956278+0800)转为字符串
	 /// </summary>
	 private static string ConvertJsonDateToDateString(Match m)
	 {
	 string result = string.Empty;
	 DateTime dt = new DateTime(1970, 1, 1);
	 dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));
	 dt = dt.ToLocalTime();
	 result = dt.ToString("yyyy-MM-dd HH:mm:ss");
	 return result;
	 }

	 /// <summary>
	 /// 将时间字符串转为Json时间
	 /// </summary>
	 private static string ConvertDateStringToJsonDate(Match m)
	 {
	 string result = string.Empty;
	 DateTime dt = DateTime.Parse(m.Groups[0].Value);
	 dt = dt.ToUniversalTime();
	 TimeSpan ts = dt - DateTime.Parse("1970-01-01");
	 result = string.Format("\\/Date({0}+0800)\\/", ts.TotalMilliseconds);
	 return result;
	 }

	 /// <summary>
	 /// List转成json
	 /// </summary>
	 /// <typeparam name="T"></typeparam>
	 /// <param name="list"></param>
	 /// <returns></returns>
	 public static string ListToJson<T>(IList<T> list)
	 {
	 object obj = list[0];
	 return ListToJson<T>(list, obj.GetType().Name);
	 }

	 /// <summary>
	 /// 对象转换为Json字符串
	 /// </summary>
	 /// <param name="jsonObject">对象</param>
	 /// <returns>Json字符串</returns>
	 public static string ToJson(object jsonObject)
	 {
	 try
	 {
	 StringBuilder jsonString = new StringBuilder();
	 jsonString.Append("{");
	 PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();
	 for (int i = 0; i < propertyInfo.Length; i++)
	 {
	 object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null);
	 if (objectValue == null)
	 {
	 continue;
	 }
	 StringBuilder value = new StringBuilder();
	 if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan)
	 {
	 value.Append("\"" + objectValue.ToString() + "\"");
	 }
	 else if (objectValue is string)
	 {
	 value.Append("\"" + objectValue.ToString() + "\"");
	 }
	 else if (objectValue is IEnumerable)
	 {
	 value.Append(ToJson((IEnumerable)objectValue));
	 }
	 else
	 {
	 value.Append("\"" + objectValue.ToString() + "\"");
	 }
	 jsonString.Append("\"" + propertyInfo[i].Name + "\":" + value + ","); ;
	 }
	 return jsonString.ToString().TrimEnd(',') + "}";
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 }

	 /// <summary>
	 /// 对象集合转换Json
	 /// </summary>
	 /// <param name="array">集合对象</param>
	 /// <returns>Json字符串</returns>
	 public static string ToJson(IEnumerable array)
	 {
	 string jsonString = "[";
	 foreach (object item in array)
	 {
	 jsonString += ToJson(item) + ",";
	 }
	 if (jsonString.Length > 1)
	 {
	 jsonString.Remove(jsonString.Length - 1, jsonString.Length);
	 }
	 else
	 {
	 jsonString = "[]";
	 }
	 return jsonString + "]";
	 }

	 /// <summary>
	 /// 普通集合转换Json
	 /// </summary>
	 /// <param name="array">集合对象</param>
	 /// <returns>Json字符串</returns>
	 public static string ToArrayString(IEnumerable array)
	 {
	 string jsonString = "[";
	 foreach (object item in array)
	 {
	 jsonString = ToJson(item.ToString()) + ",";
	 }
	 jsonString.Remove(jsonString.Length - 1, jsonString.Length);
	 return jsonString + "]";
	 }

	 /// <summary>
	 /// Datatable转换为Json
	 /// </summary>
	 /// <param name="table">Datatable对象</param>
	 /// <returns>Json字符串</returns>
	 public static string ToJson(DataTable dt)
	 {
	 StringBuilder jsonString = new StringBuilder();
	 jsonString.Append("[");
	 DataRowCollection drc = dt.Rows;
	 for (int i = 0; i < drc.Count; i++)
	 {
	 jsonString.Append("{");
	 for (int j = 0; j < dt.Columns.Count; j++)
	 {
	 string strKey = dt.Columns[j].ColumnName;
	 string strValue = drc[i][j].ToString();
	 Type type = dt.Columns[j].DataType;
	 jsonString.Append("\"" + strKey + "\":");
	 strValue = StringFormat(strValue, type);
	 if (j < dt.Columns.Count - 1)
	 {
	 jsonString.Append(strValue + ",");
	 }
	 else
	 {
	 jsonString.Append(strValue);
	 }
	 }
	 jsonString.Append("},");
	 }
	 jsonString.Remove(jsonString.Length - 1, 1);
	 jsonString.Append("]");
	 if (jsonString.Length == 1)
	 {
	 return "[]";
	 }
	 return jsonString.ToString();
	 }

	 /// <summary>
	 /// DataTable转成Json
	 /// </summary>
	 /// <param name="jsonName"></param>
	 /// <param name="dt"></param>
	 /// <returns></returns>
	 public static string ToJson(DataTable dt, string jsonName)
	 {
	 StringBuilder Json = new StringBuilder();
	 if (string.IsNullOrEmpty(jsonName))
	 jsonName = dt.TableName;
	 Json.Append("{\"" + jsonName + "\":[");
	 if (dt.Rows.Count > 0)
	 {
	 for (int i = 0; i < dt.Rows.Count; i++)
	 {
	 Json.Append("{");
	 for (int j = 0; j < dt.Columns.Count; j++)
	 {
	 Type type = dt.Rows[i][j].GetType();
	 Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + StringFormat(dt.Rows[i][j] is DBNull ? string.Empty : dt.Rows[i][j].ToString(), type));
	 if (j < dt.Columns.Count - 1)
	 {
	 Json.Append(",");
	 }
	 }
	 Json.Append("}");
	 if (i < dt.Rows.Count - 1)
	 {
	 Json.Append(",");
	 }
	 }
	 }
	 Json.Append("]}");
	 return Json.ToString();
	 }

	 /// <summary>
	 /// DataReader转换为Json
	 /// </summary>
	 /// <param name="dataReader">DataReader对象</param>
	 /// <returns>Json字符串</returns>
	 public static string ToJson(IDataReader dataReader)
	 {
	 try
	 {
	 StringBuilder jsonString = new StringBuilder();
	 jsonString.Append("[");

	 while (dataReader.Read())
	 {
	 jsonString.Append("{");
	 for (int i = 0; i < dataReader.FieldCount; i++)
	 {
	 Type type = dataReader.GetFieldType(i);
	 string strKey = dataReader.GetName(i);
	 string strValue = dataReader[i].ToString();
	 jsonString.Append("\"" + strKey + "\":");
	 strValue = StringFormat(strValue, type);
	 if (i < dataReader.FieldCount - 1)
	 {
	 jsonString.Append(strValue + ",");
	 }
	 else
	 {
	 jsonString.Append(strValue);
	 }
	 }
	 jsonString.Append("},");
	 }
	 if (!dataReader.IsClosed)
	 {
	 dataReader.Close();
	 }
	 jsonString.Remove(jsonString.Length - 1, 1);
	 jsonString.Append("]");
	 if (jsonString.Length == 1)
	 {
	 return "[]";
	 }
	 return jsonString.ToString();
	 }
	 catch (Exception ex)
	 {
	 throw ex;
	 }
	 }

	 /// <summary>
	 /// DataSet转换为Json
	 /// </summary>
	 /// <param name="dataSet">DataSet对象</param>
	 /// <returns>Json字符串</returns>
	 public static string ToJson(DataSet dataSet)
	 {
	 string jsonString = "{";
	 foreach (DataTable table in dataSet.Tables)
	 {
	 jsonString += "\"" + table.TableName + "\":" + ToJson(table) + ",";
	 }
	 jsonString = jsonString.TrimEnd(',');
	 return jsonString + "}";
	 }

	 /// <summary>
	 /// 过滤特殊字符
	 /// </summary>
	 /// <param name="s"></param>
	 /// <returns></returns>
	 public static string String2Json(String s)
	 {
	 StringBuilder sb = new StringBuilder();
	 for (int i = 0; i < s.Length; i++)
	 {
	 char c = s.ToCharArray()[i];
	 switch (c)
	 {
	 case '\"':
	 sb.Append("\\\""); break;
	 case '\\':
	 sb.Append("\\\\"); break;
	 case '/':
	 sb.Append("\\/"); break;
	 case '\b':
	 sb.Append("\\b"); break;
	 case '\f':
	 sb.Append("\\f"); break;
	 case '\n':
	 sb.Append("\\n"); break;
	 case '\r':
	 sb.Append("\\r"); break;
	 case '\t':
	 sb.Append("\\t"); break;
	 case '\v':
	 sb.Append("\\v"); break;
	 case '\0':
	 sb.Append("\\0"); break;
	 default:
	 sb.Append(c); break;
	 }
	 }
	 return sb.ToString();
	 }

	 /// <summary>
	 /// 格式化字符型、日期型、布尔型
	 /// </summary>
	 /// <param name="str"></param>
	 /// <param name="type"></param>
	 /// <returns></returns>
	 private static string StringFormat(string str, Type type)
	 {
	 if (type != typeof(string) && string.IsNullOrEmpty(str))
	 {
	 str = "\"" + str + "\"";
	 }
	 else if (type == typeof(string))
	 {
	 str = String2Json(str);
	 str = "\"" + str + "\"";
	 }
	 else if (type == typeof(DateTime))
	 {
	 str = "\"" + str + "\"";
	 }
	 else if (type == typeof(bool))
	 {
	 str = str.ToLower();
	 }
	 else if (type == typeof(byte[]))
	 {
	 str = "\"" + str + "\"";
	 }else if(type==typeof(Guid))
	 {
	 str = "\"" + str + "\"";
	 }
	 return str;
	 }

	
	 public static void RegistAjax(HtmlHead Header, Type type)
	 {
	 string assemblyName = type.FullName + "," + type.Assembly.FullName.Substring(0, type.Assembly.FullName.IndexOf(","));
	 if (type.Assembly.FullName.StartsWith("App_Code."))
	 {
	 assemblyName = type.FullName + ",App_Code";
	 }
	 Literal l = new Literal();
	 l.Text = "\n<script type=\"text/javascript\" src=\"/ajaxpro/prototype.ashx\"></script>\n"
	 + "<script type=\"text/javascript\" src=\"/ajaxpro/core.ashx\"></script>\n"
	 + "<script type=\"text/javascript\" src=\"/ajaxpro/converter.ashx\"></script>\n"
	 + "<script type=\"text/javascript\" src=\"/ajaxpro/" + assemblyName + ".ashx\"></script>\n";
	 Header.Controls.Add(l);
	 }
	 }
	}
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