.net Json JavaScriptSerializer JsonHelper类

结合.net 的JavaScriptSerializer 类实现Json数据处理

调用1：

     Model.Users m = BLL.UsersBLL.GetUserById(Convert.ToInt32(id));string result = "";if (m != null)result = JsonHelper.ObjectToJSON(m);context.Response.Write(result);

 调用2：

    Hashtable ht = new Hashtable();List<Model.UsersModel> resultlist = BLL.UsersBLL.GetUsersList(type, begin, end, page, 4, ht);string result = JsonHelper.ObjectToJSON(new{@list = resultlist,@today = DateTime.Now.ToString("yyyy-MM-dd"),@pageIndex = page,@recordCount = ht["rowcount"],@pageCount = ht["pagecount"]});context.Response.Write(result);
//
前台JS调用Json数据

$.ajax({
url: "../handler/zeji.ashx",
type: "POST",
data: "type=" + type + "&time=" + time + "&page=" + page,
//completed: $("#indicator").hide(),
success: function (data) {
data = eval("(" + data + ")");

   for (var i = 0; i < data.list.length; i++) {

 　　 var riqi = data.list[i].Riqi.toString();

 }

var recordCount = data.recordCount;

}

});

 

 

JsonHelper 类

public class JsonHelper
{#region 私有方法/// <summary>/// 过滤特殊字符/// </summary>private static string StringToJson(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;default:sb.Append(c); break;}}return sb.ToString();}/// <summary>/// 格式化字符型、日期型、布尔型/// </summary>private static string StringFormat(string str, Type type){if (type == typeof(string)){str = StringToJson(str);str = "\"" + str + "\"";}else if (type == typeof(DateTime)){str = "\"" + str + "\"";}else if (type == typeof(bool)){str = str.ToLower();}else if (type != typeof(string) && string.IsNullOrEmpty(str)){str = "\"" + str + "\"";}return str;}#endregion#region List转换成Json/// <summary>/// List转换成Json/// </summary>public static string ListToJson<T>(IList<T> list){object obj = list[0];return ListToJson<T>(list, obj.GetType().Name);}/// <summary>/// List转换成Json /// </summary>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 = pi[j].GetValue(list[i], null).GetType();Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(pi[j].GetValue(list[i], null).ToString(), type));if (j < pi.Length - 1){Json.Append(",");}}Json.Append("}");if (i < list.Count - 1){Json.Append(",");}}}Json.Append("]}");return Json.ToString();}#endregion#region 对象转换为Json/// <summary> /// 对象转换为Json /// </summary> /// <param name="jsonObject">对象</param> /// <returns>Json字符串</returns> public static string ToJson(object jsonObject){string jsonString = "{";PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();for (int i = 0; i < propertyInfo.Length; i++){object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null);string value = string.Empty;if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan){value = "'" + objectValue.ToString() + "'";}else if (objectValue is string){value = "'" + ToJson(objectValue.ToString()) + "'";}else if (objectValue is IEnumerable){value = ToJson((IEnumerable)objectValue);}else{value = ToJson(objectValue.ToString());}jsonString += "\"" + ToJson(propertyInfo[i].Name) + "\":" + value + ",";}jsonString.Remove(jsonString.Length - 1, jsonString.Length);return jsonString + "}";}#endregion#region 对象集合转换Json/// <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) + ",";}jsonString.Remove(jsonString.Length - 1, jsonString.Length);return jsonString + "]";}#endregion#region 普通集合转换Json/// <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 + "]";}#endregion#region Object转JSON/// <summary>/// 对象转JSON/// </summary>/// <param name="obj">对象</param>/// <returns>JSON格式的字符串</returns>public static string ObjectToJSON(object obj){JavaScriptSerializer jss = new JavaScriptSerializer();try{return jss.Serialize(obj);}catch (Exception ex){throw new Exception("JSONHelper.ObjectToJSON(): " + ex.Message);}}#endregion#region  DataSet转换为Json/// <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 + "}";}#endregion#region DataSet转键值对数组字典/// <summary>/// 数据集转键值对数组字典/// </summary>/// <param name="dataSet">数据集</param>/// <returns>键值对数组字典</returns>public static Dictionary<string, List<Dictionary<string, object>>> DataSetToDic(DataSet ds){Dictionary<string, List<Dictionary<string, object>>> result = new Dictionary<string, List<Dictionary<string, object>>>();foreach (DataTable dt in ds.Tables)result.Add(dt.TableName, DataTableToList(dt));return result;}#endregion#region Datatable转换为Json/// <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("]");return jsonString.ToString();}/// <summary>/// DataTable转换为Json /// </summary>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].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();}#endregion#region DataTable转键值对集合/// <summary>/// 数据表转键值对集合/// 把DataTable转成 List集合, 存每一行/// 集合中放的是键值对字典,存每一列/// </summary>/// <param name="dt">数据表</param>/// <returns>哈希表数组</returns>public static List<Dictionary<string, object>> DataTableToList(DataTable dt){List<Dictionary<string, object>> list= new List<Dictionary<string, object>>();foreach (DataRow dr in dt.Rows){Dictionary<string, object> dic = new Dictionary<string, object>();foreach (DataColumn dc in dt.Columns){dic.Add(dc.ColumnName, dr[dc.ColumnName]);}list.Add(dic);}return list;}#endregion#region DataTable转List<T>/// <summary>/// DataTable转List<T>/// </summary>/// <typeparam name="T">数据项类型</typeparam>/// <param name="dt">DataTable</param>/// <returns>List数据集</returns>public static List<T> DataTableToList<T>(DataTable dt) where T : new(){List<T> tList = new List<T>();if (dt == null || dt.Rows.Count == 0){return tList;}PropertyInfo[] propertys = typeof(T).GetProperties();   //获取此实体的公共属性foreach (DataRow dr in dt.Rows){T t = new T();foreach (PropertyInfo pi in propertys){if (!pi.CanWrite){continue;}string columnName = pi.Name;if (dr.Table.Columns.Contains(columnName)){// 判断此属性是否有Setter或columnName值是否为空object value = dr[columnName];if (value is DBNull || value == DBNull.Value || value == null || !pi.CanWrite){continue;}#region SetValuetry{switch (pi.PropertyType.ToString()){case "System.String":pi.SetValue(t, Convert.ToString(value), null);break;case "System.ToChar":pi.SetValue(t, Convert.ToChar(value), null);break;case "System.Int64":pi.SetValue(t, Convert.ToInt64(value), null);break;case "System.Int32":pi.SetValue(t, Convert.ToInt32(value), null);break;case "System.ToUInt64":pi.SetValue(t, Convert.ToUInt64(value), null);break;case "System.ToUInt32":pi.SetValue(t, Convert.ToUInt32(value), null);break;case "System.DateTime":pi.SetValue(t, Convert.ToDateTime(value), null);break;case "System.Boolean":pi.SetValue(t, Convert.ToBoolean(value), null);break;case "System.Double":pi.SetValue(t, Convert.ToDouble(value), null);break;case "System.Decimal":pi.SetValue(t, Convert.ToDecimal(value), null);break;case "System.Single":pi.SetValue(t, Convert.ToSingle(value), null);break;default:pi.SetValue(t, value, null);break;}}catch{//throw (new Exception(ex.Message));
                    }#endregion}}tList.Add(t);}return tList;}#endregion#region DataTable转JSON/// <summary>/// 数据表转JSON/// </summary>/// <param name="dataTable">数据表</param>/// <returns>JSON字符串</returns>public static string DataTableToJSON(DataTable dt){return ObjectToJSON(DataTableToList(dt));}#endregion#region 泛型集合转DataTable/// <summary>/// 泛型集合转DataTable/// </summary>/// <typeparam name="T">集合类型</typeparam>/// <param name="entityList">泛型集合</param>/// <returns>DataTable</returns>public static DataTable ListToDataTable<T>(IList<T> entityList){if (entityList == null) return null;DataTable dt = CreateTable<T>();Type entityType = typeof(T);//PropertyInfo[] properties = entityType.GetProperties();PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(entityType);foreach (T item in entityList){DataRow row = dt.NewRow();foreach (PropertyDescriptor property in properties){row[property.Name] = property.GetValue(item);}dt.Rows.Add(row);}return dt;}#endregion#region 创建DataTable的结构/// <summary>/// 创建表结构/// </summary>/// <typeparam name="T"></typeparam>/// <returns></returns>private static DataTable CreateTable<T>(){Type entityType = typeof(T);//PropertyInfo[] properties = entityType.GetProperties();PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(entityType);//生成DataTable的结构DataTable dt = new DataTable();foreach (PropertyDescriptor prop in properties){dt.Columns.Add(prop.Name);}return dt;}#endregion#region DataReader转换为Json/// <summary> /// DataReader转换为Json /// </summary> /// <param name="dataReader">DataReader对象</param> /// <returns>Json字符串</returns> public static string ToJson(DbDataReader dataReader){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("},");}dataReader.Close();jsonString.Remove(jsonString.Length - 1, 1);jsonString.Append("]");return jsonString.ToString();}#endregion#region DataReader转实体/// <summary>/// DataReader转实体/// </summary>/// <typeparam name="T">数据类型</typeparam>/// <param name="dr">DataReader</param>/// <returns>实体</returns>public static T DataReaderToModel<T>(IDataReader dr) where T : new(){T t = new T();if (dr == null){dr.Close();return default(T);}using (dr){if (dr.Read()){PropertyInfo[] propertys = t.GetType().GetProperties(); //获取此实体的公共属性List<string> DBFieldNameList = new List<string>(dr.FieldCount);for (int i = 0; i < dr.FieldCount; i++){DBFieldNameList.Add(dr.GetName(i).ToLower());}foreach (PropertyInfo pi in propertys){if (!pi.CanWrite){continue;}string columnName = pi.Name;if (DBFieldNameList.Contains(columnName.ToLower())){//判断此属性是否有Setter或columnName值是否为空object value = dr[columnName];if (value is DBNull || value == DBNull.Value || value == null || !pi.CanWrite){continue;}#region SetValuetry{switch (pi.PropertyType.ToString()){case "System.String":pi.SetValue(t, Convert.ToString(value), null);break;case "System.ToChar":pi.SetValue(t, Convert.ToChar(value), null);break;case "System.Int64":pi.SetValue(t, Convert.ToInt64(value), null);break;case "System.Int32":pi.SetValue(t, Convert.ToInt32(value), null);break;case "System.ToUInt64":pi.SetValue(t, Convert.ToUInt64(value), null);break;case "System.ToUInt32":pi.SetValue(t, Convert.ToUInt32(value), null);break;case "System.DateTime":pi.SetValue(t, Convert.ToDateTime(value), null);break;case "System.Boolean":pi.SetValue(t, Convert.ToBoolean(value), null);break;case "System.Double":pi.SetValue(t, Convert.ToDouble(value), null);break;case "System.Decimal":pi.SetValue(t, Convert.ToDecimal(value), null);break;case "System.Single":pi.SetValue(t, Convert.ToSingle(value), null);break;default:pi.SetValue(t, value, null);break;}}catch{//throw (new Exception(ex.Message));
                        }#endregion}}}}dr.Close();return t;}#endregion#region DataReader转List<T>/// <summary>/// DataReader转List<T>/// </summary>/// <typeparam name="T">数据类型</typeparam>/// <param name="dr">DataReader</param>/// <returns>List数据集</returns>public static List<T> DataReaderToList<T>(IDataReader dr) where T : new(){List<T> tList = new List<T>();if (dr == null){dr.Close();return tList;}using (dr){PropertyInfo[] propertys = typeof(T).GetProperties();    //获取此实体的公共属性List<string> DBFieldNameList = new List<string>(dr.FieldCount);for (int i = 0; i < dr.FieldCount; i++){DBFieldNameList.Add(dr.GetName(i).ToLower());}while (dr.Read()){T t = new T();foreach (PropertyInfo pi in propertys){if (!pi.CanWrite){continue;}string columnName = pi.Name;if (DBFieldNameList.Contains(columnName.ToLower())){// 判断此属性是否有Setter或columnName值是否为空object value = dr[columnName];if (value is DBNull || value == DBNull.Value || value == null || !pi.CanWrite){continue;}#region SetValuetry{switch (pi.PropertyType.ToString()){case "System.String":pi.SetValue(t, Convert.ToString(value), null);break;case "System.ToChar":pi.SetValue(t, Convert.ToChar(value), null);break;case "System.Int64":pi.SetValue(t, Convert.ToInt64(value), null);break;case "System.Int32":pi.SetValue(t, Convert.ToInt32(value), null);break;case "System.ToUInt64":pi.SetValue(t, Convert.ToUInt64(value), null);break;case "System.ToUInt32":pi.SetValue(t, Convert.ToUInt32(value), null);break;case "System.DateTime":pi.SetValue(t, Convert.ToDateTime(value), null);break;case "System.Boolean":pi.SetValue(t, Convert.ToBoolean(value), null);break;case "System.Double":pi.SetValue(t, Convert.ToDouble(value), null);break;case "System.Decimal":pi.SetValue(t, Convert.ToDecimal(value), null);break;case "System.Single":pi.SetValue(t, Convert.ToSingle(value), null);break;default:pi.SetValue(t, value, null);break;}}catch{//throw (new Exception(ex.Message));
                        }#endregion}}tList.Add(t);}}dr.Close();return tList;}#endregion#region 序列化、反序列化/// <summary>/// 对象序列化/// </summary>/// <typeparam name="T"></typeparam>/// <param name="obj"></param>/// <returns></returns>public static String Serialize<T>(T obj){String s;JavaScriptSerializer ser = new JavaScriptSerializer();ser.MaxJsonLength = Int32.MaxValue;s = ser.Serialize(obj);/*DataContractJsonSerializer ser = new DataContractJsonSerializer(obj.GetType());using (MemoryStream ms = new MemoryStream()) {ser.WriteObject(ms, obj);s = Encoding.Default.GetString(ms.ToArray());}*/return s;}/// <summary>/// 反序列化/// </summary>/// <typeparam name="T"></typeparam>/// <param name="json"></param>/// <returns></returns>public static T Deserialize<T>(String json){JavaScriptSerializer jss = new JavaScriptSerializer();return jss.Deserialize<T>(json);//T o;//json = HttpContext.Current.Server.UrlDecode(json);//JavaScriptSerializer ser = new JavaScriptSerializer();//ser.MaxJsonLength = Int32.MaxValue;//o = ser.Deserialize<T>(json);//return o;/*o = Activator.CreateInstance<T>();using (MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(json))) {DataContractJsonSerializer ser = new DataContractJsonSerializer(o.GetType());o = (T)(ser.ReadObject(ms));}*/}#endregion#region JSON文本转对象,泛型方法/// <summary>/// JSON文本转对象,泛型方法/// </summary>/// <typeparam name="T">类型</typeparam>/// <param name="jsonText">JSON文本</param>/// <returns>指定类型的对象</returns>public static T JSONToObject<T>(string jsonText){JavaScriptSerializer jss = new JavaScriptSerializer();try{return jss.Deserialize<T>(jsonText);}catch (Exception ex){throw new Exception("JSONHelper.JSONToObject(): " + ex.Message);}}#endregion#region 将JSON文本转换为数据表数据/// <summary>/// 将JSON文本转换为数据表数据/// </summary>/// <param name="jsonText">JSON文本</param>/// <returns>数据表字典</returns>public static Dictionary<string, List<Dictionary<string, object>>> TablesDataFromJSON(string jsonText){return JSONToObject<Dictionary<string, List<Dictionary<string, object>>>>(jsonText);}#endregion#region  将JSON文本转换成数据行/// <summary>/// 将JSON文本转换成数据行/// </summary>/// <param name="jsonText">JSON文本</param>/// <returns>数据行的字典</returns>public static Dictionary<string, object> DataRowFromJSON(string jsonText){return JSONToObject<Dictionary<string, object>>(jsonText);}#endregion
}

 后台Http请求

    /// <summary>/// /// </summary>/// <param name="url">网址</param>/// <param name="parase">参数</param>/// <param name="encoding">编码格式 </param>/// <returns></returns>public static string GetHttpPost(string url, string encoding){if (encoding == null)encoding = "gb2312";try{WebClient WC = new WebClient();WC.Headers.Add("Content-Type", "application/x-www-form-urlencoded");int p = url.IndexOf("?");string sData = url.Substring(p + 1);url = url.Substring(0, p);byte[] postData = Encoding.GetEncoding(encoding).GetBytes(sData);byte[] responseData = WC.UploadData(url, "POST", postData);string ct = Encoding.GetEncoding(encoding).GetString(responseData);return ct;}catch (Exception Ex){return Ex.Message;}}
View Code

 

转载于:https://www.cnblogs.com/yonsy/p/4446958.html

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