开发日记:JsonCSharpHelp
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using Newtonsoft.Json; using Newtonsoft.Json.Linq; using Newtonsoft.Json.Converters;
public static class JsonCSharpHelp
{
/// <summary>
/// 取得某个Json value
/// </summary>
/// <param name="JsonString">{Name:aaaaa,Value:aaaa}</param>
/// <param name="tagName"></param>
/// <returns></returns>
public static string GetJsonValue(string JsonString,string tagName)
{
JsonString = JsonString.TrimStart(‘{‘);
JsonString = JsonString.TrimEnd(‘}‘);
string[] splts = JsonString.Split(‘,‘);
foreach (string tmp in splts)
{
if (tmp != string.Empty)
{
string[] tag = tmp.Split(‘:‘);
if (tag[0] == tagName) return tag[1];
}
}
return string.Empty;
}
/// <summary>
/// 获取系统字典里的json对象集合
/// json对象集合格式：[{"key":"1","value":"default"},{"key":"2","value":"default1"},{"key":"3","value":"default2"}]
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="JsonStr"></param>
/// <returns></returns>
public static List<T> JSONStringToList<T>(this string JsonStr)
{
/*javascriptSerializer Serializer = new JavaScriptSerializer();
List<T> objs = Serializer.Deserialize<List<T>>(JsonStr);
return objs;*/
return JsonConvert.DeserializeObject<List<T>>(JsonStr);
}
/// <summary>
/// 把json字符串转成对象
/// </summary>
/// <typeparam name="T">对象</typeparam>
/// <param name="data">json字符串</param>
public static T JSONStringToObj<T>(string data)
{
/* JavaScriptSerializer json = new JavaScriptSerializer();
return json.Deserialize<T>(data);*/
return JsonConvert.DeserializeObject<T>(data);
}
/// <summary>
/// 把对象转成json字符串
/// </summary>
/// <param name="o">对象</param>
/// <returns>json字符串</returns>
public static string ObjToJSONString(object o)
{
/*System.Text.StringBuilder sb = new System.Text.StringBuilder();
JavaScriptSerializer json = new JavaScriptSerializer();
json.Serialize(o, sb);
return sb.ToString();*/
// return JsonConvert.SerializeObject(o, new DataTableConverter());
/*var jSetting = new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore };
var json = JsonConvert.SerializeObject(response, Formatting.Indented, jSetting);*/
return JsonConvert.SerializeObject(o, new JsonSerializerSettings() { DateFormatString = "yyyy-MM-dd hh:mm:ss"});
}
/// <summary>
/// 将原表类型为decimal类型的数据改为string类型
/// </summary>
/// <param name="argDataTable"></param>
/// <returns></returns>
public static DataTable ModifyDataTableColumnType(DataTable argDataTable)
{
bool bl = false;
DataTable dtResult = new DataTable();
//克隆表结构
dtResult = argDataTable.Clone();
foreach (DataColumn col in dtResult.Columns)
{
if (col.DataType == typeof(decimal))
{
//修改列类型
col.DataType = typeof(String);
bl = true;
}
}
if (bl)
{
foreach (DataRow row in argDataTable.Rows)
{
DataRow rowNew = dtResult.NewRow();
rowNew.ItemArray = row.ItemArray;
dtResult.Rows.Add(rowNew);
}
return dtResult;
}
return argDataTable;
}
/// <summary>
/// 传入jsong串，获取匹配key的value值
/// </summary>
/// <param name="JsonStr"></param>
/// <param name="matchKey"></param>
/// <returns></returns>
public static string GetSysParamValueByKey(string JsonStr, string matchKey)
{
string strResult = "";
IList<SysParamJsonObj> list = JsonCSharpHelp.JSONStringToList<SysParamJsonObj>(JsonStr);
foreach (SysParamJsonObj sysOjb in list)
{
if (sysOjb.key.ToUpper() == matchKey.ToUpper())
{
strResult = sysOjb.value;
break;
}
}
return strResult;
}
/// <summary>
///根据对象SysParamJsonObj列表获取到某个key对应的value值
/// </summary>
/// <param name="list"></param>
/// <param name="matchKey"></param>
/// <returns></returns>
public static string GetSysParamValueByKey(IList<SimpleParamObj> list, string matchKey)
{
string strResult = "";
if (list == null) return strResult;
foreach (SimpleParamObj sysOjb in list)
{
if (sysOjb.K.ToUpper() == matchKey.ToUpper())
{
strResult = sysOjb.V;
break;
}
}
return strResult;
}
/// <summary>
/// 获取一个类指定的属性值
/// </summary>
/// <param name="info">json对象 "{"3":123,body:456,list:{title:‘abc‘,body:‘what‘}}"</param>
/// <param name="field">属性名称</param>
/// <param name="erro">输出错误信息</param>
/// <returns></returns>
public static object GetPropertyValue(object info, string field, out string erro)
{
erro = string.Empty;
if (info == null) return null;
JObject jo = null;
try
{
jo = JObject.Parse(info.ToString());
}
catch (Exception e)
{
erro = "传入对象非json对象格式:" + e.Message;
return null;
}
if (jo.Property(field) == null || jo.Property(field).ToString() == "")
{
erro = "键值 " + field + " 不存在！";
return null;
}
return jo.Property(field).Value;
}
/// <summary>
/// 获取一个类指定的属性值
/// </summary>
/// <param name="info">json对象 "{"3":123,body:456,list:{title:‘abc‘,body:‘what‘}}"</param>
/// <param name="field">属性名称</param>
/// <param name="erro">输出错误信息</param>
/// <returns></returns>
public static Hashtable GetPropertyValue(object info, string[] fields)
{
Hashtable ht = new Hashtable();
// erro = string.Empty;
if (info == null) return null;
// Type t = info.GetType();
// info = "{"3":123,body:456,list:{title:‘abc‘,body:‘what‘}}";
/* if (t != typeof(JObject))
{
erro = "传入对象非json对象格式";
return null;
}*/
JObject jo = null;
try
{
jo = JObject.Parse(info.ToString());
}
catch (Exception e)
{
// erro = "传入对象非json对象格式:" + e.Message;
return null;
}
int len = fields.Length;
object[] os = new object[len];
IEnumerable<JProperty> properties = jo.Properties();
int i = 0;
bool bl = false;
string f = string.Empty;
for (i = 0; i < len; i++)
{
bl = false;
f = fields[i];
foreach (JProperty item in properties)
{
if (item.Name.ToUpper() == f.ToUpper())
{
ht.Add(f, item.Value);
//os[i] = item.Value;
bl = true;
break;
}
}
if (!bl)
{
ht.Add(f, "");
// erro = "没有找到键值对匹配项" + f;
// return null;
}
}
return ht;
}
/// <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>
/// JSON序列化
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
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();
string pattern = @"\/Date((d+)+d+)\/";
MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);
Regex reg = new Regex(pattern);
jsonString = reg.Replace(jsonString, matchEvaluator);
return jsonString;
}
/// <summary>
/// JSON反序列化
/// </summary>
/// <param name="jsonString"></param>
/// <returns></returns>
public static T JsonDeserialize<T>(string jsonString)
{
string pattern = @"d{4}-d{2}-d{2}sd{2}:d{2}:d{2}";
MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate);
Regex reg = new Regex(pattern);
jsonString = reg.Replace(jsonString, matchEvaluator);
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(Person));
MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
T obj = (T)ser.ReadObject(ms);
return obj;
}
*/
/// <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转换为Json
/// </summary>
/// <param name="table">Datatable对象</param>
/// <param name="dataCount">数据总量 分页用</param>
/// <returns>Json字符串</returns>
public static string ToJson(DataTable dt, int dataCount)
{
StringBuilder jsonString = new StringBuilder();
jsonString.Append("[");
DataRowCollection drc = dt.Rows;
for (int i = 0; i < drc.Count; i++)
{
jsonString.Append("{");
jsonString.Append(""DATA_COUNT":" + dataCount + ",");
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 ‘‘:
sb.Append("\b"); break;
case ‘f‘:
sb.Append("\f"); break;
case ‘
‘:
sb.Append("\n"); break;
case ‘
‘:
sb.Append("\r"); break;
case ‘ ‘:
sb.Append("\t"); break;
case ‘v‘:
sb.Append("\v"); break;
case ‘ ‘:
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;
}
}
/// <summary>
/// json对象
/// </summary>
[Serializable]
public class SysParamJsonObj
{
/// <summary>
/// id
/// </summary>
public string key;
/// <summary>
/// value
/// </summary>
public string value;
}
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