转换Json格式帮助类

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.Data;
using System.Collections;namespace AIMSCommon
{
/// <summary>
/// 转换Json格式帮助类
/// </summary>
public class JsonHelper
{
/// <summary>
/// 泛型接口转Json
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list"></param>
/// <returns></returns>
public static string IListToJson<T>(IList<T> list)
{
StringBuilder sb = new StringBuilder();
sb.Append("[");
foreach (T t in list)
{
sb.Append(ObjectToJson(t) + ",");
}
string _temp = sb.ToString().TrimEnd(',');
_temp += "]";
return _temp;
}
/// <summary>
/// 泛型接口转Json
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list"></param>
/// <param name="ClassName"></param>
/// <returns>{"rows":[{"c_id":"21bb6911-af52-42a4-9732-24a6e8384411","eav_id":"4a9fe8ca-112a-47c0-b074-229837cfe6e6","e_id":"cfe929e3-accd-4efb-910b-07705077b6d6","ea_id":"","ea_name":"555","eav_value":"555","eav_memo":"","sud":"0"}]}</returns>
public static string IListToJson<T>(IList<T> list, string ClassName)
{
StringBuilder sb = new StringBuilder();
sb.Append("{\"" + ClassName + "\":[");
foreach (T t in list)
{
sb.Append(ObjectToJson(t) + ",");
}
string _temp = sb.ToString().TrimEnd(',');
_temp += "]}";
return _temp;
}
/// <summary>
/// 对象转Json
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="t"></param>
/// <returns>{"SM_ID":"71","SM_Img":"title.gif","SM_Memo":"当前位置：会所服务 ─ 宾客管理 ─ 宾客列表"}</returns>
public static string ObjectToJson<T>(T t)
{
StringBuilder sb = new StringBuilder();
string json = "";
if (t != null)
{
sb.Append("{");
PropertyInfo[] properties = t.GetType().GetProperties();
foreach (PropertyInfo pi in properties)
{
sb.Append("\"" + pi.Name.ToString() + "\"");
sb.Append(":");
sb.Append("\"" + pi.GetValue(t, null) + "\"");
sb.Append(",");
}
json = sb.ToString().TrimEnd(',');
json += "}";
}
return json;
}
/// <summary>
/// 对象转Json（重载）
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="t"></param>
/// <param name="ClassName"></param>
/// <returns>{"menu":[{"SM_ID":"71","SM_Img":"title.gif","SM_Memo":"当前位置：会所服务 ─ 宾客管理 ─ 宾客列表"}]}</returns>
public static string ObjectToJson<T>(T t, string ClassName)
{
StringBuilder sb = new StringBuilder();
sb.Append("{\"" + ClassName + "\":[");
string json = "";
if (t != null)
{
sb.Append("{");
PropertyInfo[] properties = t.GetType().GetProperties();
foreach (PropertyInfo pi in properties)
{
sb.Append("\"" + pi.Name.ToString() + "\"");//.ToLower()
sb.Append(":");
sb.Append("\"" + pi.GetValue(t, null) + "\"");
sb.Append(",");
}
json = sb.ToString().TrimEnd(',');
json += "}]}";
}
return json;
}
/// <summary>
/// List转成json
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="jsonName"></param>
/// <param name="IL"></param>
/// <returns></returns>
public static string ObjectToJson<T>(IList<T> IL, string jsonName)
{
StringBuilder Json = new StringBuilder();
Json.Append("{\"" + jsonName + "\":[");
if (IL.Count > 0)
{
for (int i = 0; i < IL.Count; i++)
{
T obj = Activator.CreateInstance<T>();
Type type = obj.GetType();
PropertyInfo[] pis = type.GetProperties();
Json.Append("{");
for (int j = 0; j < pis.Length; j++)
{
Json.Append("\"" + pis[j].Name.ToString() + "\":\"" + pis[j].GetValue(IL[i], null) + "\"");
if (j < pis.Length - 1)
{
Json.Append(",");
}
}
Json.Append("}");
if (i < IL.Count - 1)
{
Json.Append(",");
}
}
}
Json.Append("]}");
return Json.ToString();
} /// <summary>
/// 将数组转换为JSON格式的字符串
/// </summary>
/// <typeparam name="T">数据类型，如string,int ...</typeparam>
/// <param name="list">泛型list</param>
/// <param name="propertyname">JSON的类名</param>
/// <returns></returns>
public static string ArrayToJson<T>(List<T> list, string propertyname)
{
StringBuilder sb = new StringBuilder();
if (list.Count > 0)
{
sb.Append("[{\"");
sb.Append(propertyname);
sb.Append("\":[");
foreach (T t in list)
{
sb.Append("\"");
sb.Append(t.ToString());
sb.Append("\",");
}
string _temp = sb.ToString();
_temp = _temp.TrimEnd(',');
_temp += "]}]";
return _temp;
}
else
return "";
} /// <summary>
/// DataTable转Json
/// </summary>
/// <param name="dt">table数据集</param>
/// <param name="dtName">json名</param>
/// <returns></returns>
public static string DataTableToJson(DataTable dt, string dtName)
{
StringBuilder sb = new StringBuilder();
sb.Append("{\"");
sb.Append(dtName);
sb.Append("\":[");
if (DataTableHelper.IsExistRows(dt))
{
foreach (DataRow dr in dt.Rows)
{
sb.Append("{");
foreach (DataColumn dc in dr.Table.Columns)
{
sb.Append("\"");
sb.Append(dc.ColumnName);
sb.Append("\":\"");
if (dr[dc] != null && dr[dc] != DBNull.Value && dr[dc].ToString() != "")
sb.Append(dr[dc]).Replace("\\", "/");
else
sb.Append(" ");
sb.Append("\",");
}
sb = sb.Remove(sb.Length - 1, 1);
sb.Append("},");
}
sb = sb.Remove(sb.Length - 1, 1);
}
sb.Append("]}");
return JsonCharFilter(sb.ToString());
} /// <summary>
/// 数据行转Json
/// </summary>
/// <param name="dr">数据行</param>
/// <returns></returns>
public static string DataRowToJson(DataRow dr)
{
StringBuilder sb = new StringBuilder();
sb.Append("{");
foreach (DataColumn dc in dr.Table.Columns)
{
sb.Append("\"");
sb.Append(dc.ColumnName);
sb.Append("\":\"");
if (dr[dc] != null && dr[dc] != DBNull.Value && dr[dc].ToString() != "")
sb.Append(dr[dc]);
else
sb.Append(" ");
sb.Append("\",");
}
sb = sb.Remove(0, sb.Length - 1);
sb.Append("},");
return sb.ToString();
} /// <summary>
/// 数组转Json
/// </summary>
/// <param name="strs"></param>
/// <returns></returns>
public static string ArrayToJson(string[] strs)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < strs.Length; i++)
{
sb.AppendFormat("'{0}':'{1}',", i + 1, strs[i]);
}
if (sb.Length > 0)
return "{" + sb.ToString().TrimEnd(',') + "}";
return "";
} #region ListToJson
/// <summary>
/// list 转换json格式
/// </summary>
/// <param name="jsonName">类名</param>
/// <param name="objlist">list集合</param>
/// <returns></returns>
public static string ListToJson<T>(List<T> objlist, string jsonName)
{
string result = "{";
//如果没有给定类的名称， 指定一个
if (jsonName.Equals(string.Empty))
{
object o = objlist[0];
jsonName = o.GetType().ToString();
}
result += "\"" + jsonName + "\":[";
//处理第一行前面不加","号
bool firstline = true;
foreach (object oo in objlist)
{
if (!firstline)
{
result = result + "," + ObjectToJson(oo);
}
else
{
result = result + ObjectToJson(oo) + "";
firstline = false;
}
}
return result + "]}";
}
/// <summary>
/// 单个对象转换json
/// </summary>
/// <param name="o">对象</param>
/// <returns></returns>
private static string ObjectToJson(object o)
{
string result = "{";
List<string> ls_propertys = new List<string>();
ls_propertys = GetObjectProperty(o);
foreach (string str_property in ls_propertys)
{
if (result.Equals("{"))
{
result = result + str_property;
}
else
{
result = result + "," + str_property + "";
}
}
return result + "}";
}
/// <summary>
/// 获取对象属性
/// </summary>
/// <param name="o">对象</param>
/// <returns></returns>
private static List<string> GetObjectProperty(object o)
{
List<string> propertyslist = new List<string>();
PropertyInfo[] propertys = o.GetType().GetProperties();
foreach (PropertyInfo p in propertys)
{
propertyslist.Add("\"" + p.Name.ToString() + "\":\"" + p.GetValue(o, null) + "\""); }
return propertyslist;
} #endregion public static string HashtableToJson(Hashtable data, string dtName)
{
StringBuilder sb = new StringBuilder();
sb.Append("{\"");
sb.Append(dtName);
sb.Append("\":[{");
foreach (object key in data.Keys)
{
object value = data[key];
sb.Append("\"");
sb.Append(key);
sb.Append("\":\"");
if (!String.IsNullOrEmpty(value.ToString()) && value != DBNull.Value)
{
sb.Append(value).Replace("\\", "/");
}
else
{
sb.Append(" ");
}
sb.Append("\",");
}
sb = sb.Remove(sb.Length - 1, 1);
sb.Append("}]}");
return JsonCharFilter(sb.ToString());
}
/// <summary>
/// Json特符字符过滤
/// </summary>
/// <param name="sourceStr">要过滤的源字符串</param>
/// <returns>返回过滤的字符串</returns>
private static string JsonCharFilter(string sourceStr)
{
return sourceStr;
}
}
}