之前说到了Ext.Net中GridPanel行取值的问题（Ext.Net开发_GridPanel行选中取值），涉及到checkBox操作时，要留个心眼注意下取值的区别！返回值是Json格式。 现在用到了Json，就想自己也整一个Josn帮助类。在线帮助的资料很多，在巨人的身上东凑西凑也凑一个用用。
一、介绍
JSON(JavaScript Object Notation) 是一种轻量级的数据交换格式，基于JavaScript（Standard ECMA-262 3rd Edition - December 1999）的一个子集
方法有多种，我这边用到是DataContractJsonSerializer类，官方解释：“NET Framework 4 .NET Framework 3.5 Silverlight 将对象序列化为 JavaScript 对象表示法 (JSON)，并将 JSON 数据反序列化为对象”。
其命名空间如下：
注意：如果是.NET Framework 3.5 光引用了“System.Runtime.Serialization”了这个还不行。运行时会发现：
所以还要引用下“System.ServiceModel.Web”即可。 .NET Framework 4则在System.Runtime.Serialization下。
二、对JSON数据操作
源码：
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.IO;using System.Text;using System.Text.RegularExpressions;using System.Web.Script.Serialization;using System.Collections.Generic;using System.Runtime.Serialization.Json;namespace WebUI.CommonClass{ public class JSONHelper { /// <summary> /// JSON序列化 /// </summary> public static string JsonSerializer<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(); //替换Json的Date字符串 string p = @"\\/Date\((\d+)\+\d+\)\\/"; MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString); Regex reg = new Regex(p); jsonString = reg.Replace(jsonString, matchEvaluator); return jsonString; } /// <summary> /// JSON反序列化 /// </summary> public static T JsonDeserialize<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> /// 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; } }}
实验下：
Product
public class Product { public string proName { get ;set ; } public decimal proPrice { get; set; } public string proAttr { get; set; } public string proAddres { get; set; } }
操作
1：序列化
Product pro = new Product();pro.proAddres = "上海";pro.proAttr = "cpu";pro.proName = "电脑";pro.proPrice = 3680;string josn = JSONHelper.JsonSerializer<Product>(pro); //序列化Message.ShowAlert("提示", josn);
效果：
2，反序列化
string json = "{\"proAddres\":\"上海\",\"proAttr\":\"cpu\",\"proName\":\"电脑\",\"proPrice\":3680}";Product pro = JSONHelper.JsonDeserialize<Product>(json);
JSONHELP
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
using System.Collections;
using System.Data;
using System.Text;
using System.Reflection;
using System.Globalization;
using System.Text.RegularExpressions;
namespace FumaCRM_BS.NewWeb.Common.Class
{
public class JsonHelper
{
/// <summary>
/// DataTable转Json
/// </summary>
/// <param name="dtb"></param>
/// <returns></returns>
public static string Dtb2Json(DataTable dtb)
{
JavaScriptSerializer jss = new JavaScriptSerializer();
ArrayList dic = new ArrayList();
foreach (DataRow row in dtb.Rows)
{
Dictionary<string, object> drow = new Dictionary<string, object>();
foreach (DataColumn col in dtb.Columns)
{
drow.Add(col.ColumnName, row[col.ColumnName]);
}
dic.Add(drow);
}
return jss.Serialize(dic);
}
/// <summary>
/// Json转DataTable
/// </summary>
/// <param name="json"></param>
/// <returns></returns>
public static DataTable Json2Dtb(string json)
{
JavaScriptSerializer jss = new JavaScriptSerializer();
ArrayList dic = jss.Deserialize<ArrayList>(json);
DataTable dtb = new DataTable();
if (dic.Count > 0)
{
foreach (Dictionary<string, object> drow in dic)
{
if (dtb.Columns.Count == 0)
{
foreach (string key in drow.Keys)
{
//if (drow[key].GetType() != null)
// dtb.Columns.Add(key, drow[key].GetType());
//else
dtb.Columns.Add(key);
}
}
DataRow row = dtb.NewRow();
foreach (string key in drow.Keys)
{
row[key] = drow[key];
}
dtb.Rows.Add(row);
}
}
return dtb;
}
public static string DataTable2Json(DataTable dt)
{
if (dt == null || dt.Rows.Count == 0)
return "[]";
StringBuilder jsonBuilder = new StringBuilder();
jsonBuilder.Append("[");
for (int i = 0; i < dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = 0; j < dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
string value = dt.Rows[i][j].ToString().Replace("\r", "").Replace("\n", "").Replace("\t", "").Trim();
if (dt.Columns[j].DataType.FullName == "System.DateTime")
jsonBuilder.Append(value.Length == 0 ? value : Convert.ToDateTime(value).ToString("yyyy-MM-dd"));
else
jsonBuilder.Append(value);
jsonBuilder.Append("\",");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("},");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("]");
return jsonBuilder.ToString();
}
#region JqueryEasyUI JSON Method
/// <summary>
/// 生成表单编辑赋值 JSON格式
/// </summary>
/// <param name="dt"></param>
/// <param name="displayCount"></param>
/// <returns></returns>
public static string CreateJsonOne(DataTable dt, bool displayCount)
{
StringBuilder JsonString = new StringBuilder();
//Exception Handling
if (dt != null && dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
JsonString.Append("{ ");
for (int j = 0; j < dt.Columns.Count; j++)
{
if (j < dt.Columns.Count - 1)
{
JsonString.Append("ipt_" + dt.Columns[j].ColumnName.ToString().ToLower() + ":" + "\"" + dt.Rows[i][j].ToString() + "\",");
}
else if (j == dt.Columns.Count - 1)
{
JsonString.Append("ipt_" + dt.Columns[j].ColumnName.ToString().ToLower() + ":" + "\"" + dt.Rows[i][j].ToString() + "\"");
}
}
if (i == dt.Rows.Count - 1)
{
JsonString.Append("} ");
}
else
{
JsonString.Append("}, ");
}
}
return JsonString.ToString();
}
else
{
return null;
}
}
/// <summary>
/// 将DataTable中的数据转换成JSON格式
/// </summary>
/// <param name="dt">数据源DataTable</param>
/// <param name="displayCount">是否输出数据总条数</param>
/// <returns></returns>
public static string CreateJsonParameters(DataTable dt, bool displayCount)
{
return CreateJsonParameters(dt, displayCount, dt.Rows.Count);
}
/// <summary>
/// 将DataTable中的数据转换成JSON格式
/// </summary>
/// <param name="dt">数据源DataTable</param>
/// <returns></returns>
public static string CreateJsonParameters(DataTable dt)
{
return CreateJsonParameters(dt, true);
}
/// <summary>
/// 将DataTable中的数据转换成JSON格式
/// </summary>
/// <param name="dt">数据源DataTable</param>
/// <param name="displayCount">是否输出数据总条数</param>
/// <param name="totalcount">JSON中显示的数据总条数</param>
/// <returns></returns>
public static string CreateJsonParameters(DataTable dt, bool displayCount, int totalcount)
{
StringBuilder JsonString = new StringBuilder();
//Exception Handling
if (dt != null)
{
JsonString.Append("{ ");
JsonString.Append("\"rows\":[ ");
for (int i = 0; i < dt.Rows.Count; i++)
{
JsonString.Append("{ ");
for (int j = 0; j < dt.Columns.Count; j++)
{
if (j < dt.Columns.Count - 1)
{
//if (dt.Rows[i][j] == DBNull.Value) continue;
if (dt.Columns[j].DataType == typeof(bool))
{
JsonString.Append("\"JSON_" + dt.Columns[j].ColumnName.ToLower() + "\":" +
dt.Rows[i][j].ToString().ToLower() + ",");
}
else if (dt.Columns[j].DataType == typeof(string))
{
JsonString.Append("\"JSON_" + dt.Columns[j].ColumnName.ToLower() + "\":" + "\"" +
dt.Rows[i][j].ToString().Replace("\"", "\\\"") + "\",");
}
else
{
JsonString.Append("\"JSON_" + dt.Columns[j].ColumnName.ToLower() + "\":" + "\"" + dt.Rows[i][j] + "\",");
}
}
else if (j == dt.Columns.Count - 1)
{
//if (dt.Rows[i][j] == DBNull.Value) continue;
if (dt.Columns[j].DataType == typeof(bool))
{
JsonString.Append("\"JSON_" + dt.Columns[j].ColumnName.ToLower() + "\":" +
dt.Rows[i][j].ToString().ToLower());
}
else if (dt.Columns[j].DataType == typeof(string))
{
JsonString.Append("\"JSON_" + dt.Columns[j].ColumnName.ToLower() + "\":" + "\"" +
dt.Rows[i][j].ToString().Replace("\"", "\\\"") + "\"");
}
else
{
JsonString.Append("\"JSON_" + dt.Columns[j].ColumnName.ToLower() + "\":" + "\"" + dt.Rows[i][j] + "\"");
}
}
}
/*end Of String*/
if (i == dt.Rows.Count - 1)
{
JsonString.Append("} ");
}
else
{
JsonString.Append("}, ");
}
}
JsonString.Append("]");
if (displayCount)
{
JsonString.Append(",");
JsonString.Append("\"total\":");
JsonString.Append(totalcount);
}
JsonString.Append("}");
return JsonString.ToString().Replace("\n", "");
}
else
{
return null;
}
}
#region object 2 json
private static void WriteDataRow(StringBuilder sb, DataRow row)
{
sb.Append("{");
foreach (DataColumn column in row.Table.Columns)
{
sb.AppendFormat("\"{0}\":", column.ColumnName);
WriteValue(sb, row[column]);
sb.Append(",");
}
// Remove the trailing comma.
if (row.Table.Columns.Count > 0)
{
--sb.Length;
}
sb.Append("}");
}
private static void WriteDataSet(StringBuilder sb, DataSet ds)
{
sb.Append("{\"Tables\":{");
foreach (DataTable table in ds.Tables)
{
sb.AppendFormat("\"{0}\":", table.TableName);
WriteDataTable(sb, table);
sb.Append(",");
}
// Remove the trailing comma.
if (ds.Tables.Count > 0)
{
--sb.Length;
}
sb.Append("}}");
}
private static void WriteDataTable(StringBuilder sb, DataTable table)
{
sb.Append("{\"Rows\":[");
foreach (DataRow row in table.Rows)
{
WriteDataRow(sb, row);
sb.Append(",");
}
// Remove the trailing comma.
if (table.Rows.Count > 0)
{
--sb.Length;
}
sb.Append("]}");
}
private static void WriteEnumerable(StringBuilder sb, IEnumerable e)
{
bool hasItems = false;
sb.Append("[");
foreach (object val in e)
{
WriteValue(sb, val);
sb.Append(",");
hasItems = true;
}
// Remove the trailing comma.
if (hasItems)
{
--sb.Length;
}
sb.Append("]");
}
private static void WriteHashtable(StringBuilder sb, IDictionary e)
{
bool hasItems = false;
sb.Append("{");
foreach (string key in e.Keys)
{
sb.AppendFormat("\"{0}\":", key.ToLower());
WriteValue(sb, e[key]);
sb.Append(",");
hasItems = true;
}
// Remove the trailing comma.
if (hasItems)
{
--sb.Length;
}
sb.Append("}");
}
private static void WriteObject(StringBuilder sb, object o)
{
MemberInfo[] members = o.GetType().GetMembers(BindingFlags.Instance | BindingFlags.Public);
sb.Append("{");
bool hasMembers = false;
foreach (MemberInfo member in members)
{
bool hasValue = false;
object val = null;
if ((member.MemberType & MemberTypes.Field) == MemberTypes.Field)
{
FieldInfo field = (FieldInfo)member;
val = field.GetValue(o);
hasValue = true;
}
else if ((member.MemberType & MemberTypes.Property) == MemberTypes.Property)
{
PropertyInfo property = (PropertyInfo)member;
if (property.CanRead && property.GetIndexParameters().Length == 0)
{
val = property.GetValue(o, null);
hasValue = true;
}
}
if (hasValue)
{
sb.Append("\"");
sb.Append(member.Name);
sb.Append("\":");
WriteValue(sb, val);
sb.Append(",");
hasMembers = true;
}
}
if (hasMembers)
{
--sb.Length;
}
sb.Append("}");
}
private static void WriteString(StringBuilder sb, IEnumerable s)
{
sb.Append("\"");
foreach (char c in s)
{
switch (c)
{
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:
int i = c;
if (i < 32 || i > 127)
{
sb.AppendFormat("\\u{0:X04}", i);
}
else
{
sb.Append(c);
}
break;
}
}
sb.Append("\"");
}
public static void WriteValue(StringBuilder sb, object val)
{
if (val == null || val == DBNull.Value)
{
sb.Append("null");
}
else if (val is string || val is Guid)
{
WriteString(sb, val.ToString());
}
else if (val is bool)
{
sb.Append(val.ToString().ToLower());
}
else if (val is double ||
val is float ||
val is long ||
val is int ||
val is short ||
val is byte ||
val is decimal)
{
sb.AppendFormat(CultureInfo.InvariantCulture.NumberFormat, "{0}", val);
}
else if (val.GetType().IsEnum)
{
sb.Append((int)val);
}
else if (val is DateTime)
{
sb.Append("new Date(\"");
sb.Append(((DateTime)val).ToString("MMMM, d yyyy HH:mm:ss",
new CultureInfo("en-US", false).DateTimeFormat));
sb.Append("\")");
}
else if (val is DataSet)
{
WriteDataSet(sb, val as DataSet);
}
else if (val is DataTable)
{
WriteDataTable(sb, val as DataTable);
}
else if (val is DataRow)
{
WriteDataRow(sb, val as DataRow);
}
else if (val is Hashtable)
{
WriteHashtable(sb, val as Hashtable);
}
else if (val is IEnumerable)
{
WriteEnumerable(sb, val as IEnumerable);
}
else
{
WriteObject(sb, val);
}
}
/// <summary>
///
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static string Convert2Json(object o)
{
StringBuilder sb = new StringBuilder();
WriteValue(sb, o);
return sb.ToString();
}
#endregion
#endregion
/// <summary>
/// 转换对象为JSON格式数据
/// </summary>
/// <typeparam name="T">类</typeparam>
/// <param name="obj">对象</param>
/// <returns>字符格式的JSON数据</returns>
public static string GetJSON<T>(object obj)
{
string result = String.Empty;
try
{
System.Runtime.Serialization.Json.DataContractJsonSerializer serializer =
new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
serializer.WriteObject(ms, obj);
result = System.Text.Encoding.UTF8.GetString(ms.ToArray());
}
}
catch (Exception ex)
{
throw ex;
}
return result;
}
/// <summary>
/// 转换List<T>的数据为JSON格式
/// </summary>
/// <typeparam name="T">类</typeparam>
/// <param name="vals">列表值</param>
/// <returns>JSON格式数据</returns>
public static string JSON<T>(List<T> vals)
{
System.Text.StringBuilder st = new System.Text.StringBuilder();
try
{
System.Runtime.Serialization.Json.DataContractJsonSerializer s = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
foreach (T city in vals)
{
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
s.WriteObject(ms, city);
st.Append(System.Text.Encoding.UTF8.GetString(ms.ToArray()));
}
}
}
catch (Exception ex)
{
throw ex;
}
return st.ToString();
}
/// <summary>
/// JSON格式字符转换为T类型的对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="jsonStr"></param>
/// <returns></returns>
public static T ParseFormByJson<T>(string jsonStr)
{
T obj = Activator.CreateInstance<T>();
using (System.IO.MemoryStream ms =
new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(jsonStr)))
{
System.Runtime.Serialization.Json.DataContractJsonSerializer serializer =
new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T));
return (T)serializer.ReadObject(ms);
}
}
/// <summary>
/// 将获取的Json数据转换为DataTable
/// </summary>
/// <param name="strJson">Json字符串</param>
/// <returns></returns>
public static DataTable JsonToDataTable(string strJson)
{
//取出表名
var rg = new Regex(@"(?<={)[^:]+(?=:\[)", RegexOptions.IgnoreCase);
string strName = rg.Match(strJson).Value;
DataTable tb = null;
//去除表名
strJson = strJson.Substring(strJson.IndexOf("[") + 1);
strJson = strJson.Substring(0, strJson.IndexOf("]"));
//获取数据
rg = new Regex(@"(?<={)[^}]+(?=})");
MatchCollection mc = rg.Matches(strJson);
for (int i = 0; i < mc.Count; i++)
{
string strRow = mc[i].Value;
string[] strRows = strRow.Split(',');
//创建表
if (tb == null)
{
tb = new DataTable();
tb.TableName = strName;
foreach (string str in strRows)
{
var dc = new DataColumn();
string[] strCell = str.Split(':');
dc.ColumnName = strCell[0].Replace("\"", "");// strCell[0];
tb.Columns.Add(dc);
}
tb.AcceptChanges();
}
//增加内容
DataRow dr = tb.NewRow();
for (int r = 0; r < strRows.Length; r++)
{
dr[r] = strRows[r].Split(':')[1].Trim().Replace("，", ",").Replace("：", ":").Replace("\"", "");
}
tb.Rows.Add(dr);
tb.AcceptChanges();
}
return tb;
}
/// <summary>
///
/// </summary>
/// <param name="strJson"></param>
/// <param name="symbol"></param>
/// <returns></returns>
public static DataTable JsonToDataTable(string strJson, string symbol)
{
//取出表名
var rg = new Regex(@"(?<={)[^:]+(?=:\[)", RegexOptions.IgnoreCase);
string strName = rg.Match(strJson).Value;
DataTable tb = null;
//去除表名
strJson = strJson.Substring(strJson.IndexOf("[") + 1);
strJson = strJson.Substring(0, strJson.IndexOf("]"));
//获取数据
rg = new Regex(@"(?<={)[^}]+(?=})");
MatchCollection mc = rg.Matches(strJson);
for (int i = 0; i < mc.Count; i++)
{
string strRow = mc[i].Value;
string[] strRows = strRow.Replace(symbol, "|").Split('|');// (symbol);
//创建表
if (tb == null)
{
tb = new DataTable();
tb.TableName = strName;
foreach (string str in strRows)
{
var dc = new DataColumn();
string[] strCell = str.Split(':');
dc.ColumnName = strCell[0].Replace("\"", "");// strCell[0];
tb.Columns.Add(dc);
}
tb.AcceptChanges();
}
//增加内容
DataRow dr = tb.NewRow();
for (int r = 0; r < strRows.Length; r++)
{
dr[r] = strRows[r].Split(':')[1].Trim().Replace("，", ",").Replace("：", ":").Replace("\"", "");
}
tb.Rows.Add(dr);
tb.AcceptChanges();
}
return tb;
}
/// <summary>
/// dataTable转换成Json格式
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static string ToJson(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();
jsonBuilder.Append("{\"");
jsonBuilder.Append(dt.TableName);
jsonBuilder.Append("\":[");
for (int i = 0; i < dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = 0; j < dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString());
jsonBuilder.Append("\",");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("},");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("]");
jsonBuilder.Append("}");
return jsonBuilder.ToString();
}
}
}
作者：PEPE
出处：http://pepe.cnblogs.com/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
来源：https://www.cnblogs.com/PEPE/archive/2012/02/13/Pepe_Yu.html