システムの参照方法Runtime.Serialization.Json

今日新しくオープンしたプロジェクトが突然Systemを引用したことに気づいた.Runtime.Serialization.Jsonプロンプトネーミングスペースにタイプまたはネーミングスペース名jsonは存在しません
この間開発されたばかりのWCFは普通に引用されているのに、真剣に引用されたファイルの位置を比べてみると同じで、この間CSDNでSystemが見えないと文句を言った人もいたのを覚えています.Runtime.Serialization.Json
 
後で発見
まず、もちろんプロジェクトは3.5で、1つのSystemだけを参照します.Runtime.Serializationでは足りないので、
システムも追加します.ServiceModel、System.ServiceModel.Webの引用、OK
 
System.Runtime.Serialization.Jsonが出てきて、JSON文字列をエンティティに変換することができます.
ネーミングスペースにタイプまたはネーミングスペース名jsonは存在しません
 
 
 
Dataset回転jsonのクラス

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Reflection;
using System.Collections;
using System.Data;
using System.Data.Common;
/// <summary>
/// Summary description for FormatToJson
/// </summary>
public class FormatToJson
{
public FormatToJson()
{
//
// TODO: Add constructor logic here
//
}
/// <summary> 
/// List  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 = 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();
}
/// <summary> 
/// List  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> 
///      Json    
/// </summary> 
/// <param name="jsonObject">  </param> 
/// <returns>Json   </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 + "}";
}
/// <summary> 
///       Json 
/// </summary> 
/// <param name="array">    </param> 
/// <returns>Json   </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 + "]";
}
/// <summary> 
///       Json 
/// </summary> 
/// <param name="array">    </param> 
/// <returns>Json   </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   Json 
/// </summary> 
/// <param name="table">Datatable  </param> 
/// <returns>Json   </returns> 
public static string ToJson(DataTable dt)
{
StringBuilder jsonString = new StringBuilder();

if (dt.Rows.Count == 0)
{
jsonString.Append("[{}]");
return jsonString.ToString();
}

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  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].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   Json 
/// </summary> 
/// <param name="dataReader">DataReader  </param> 
/// <returns>Json   </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();
}
/// <summary> 
/// DataSet   Json 
/// </summary> 
/// <param name="dataSet">DataSet  </param> 
/// <returns>Json   </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> 
///        
/// </summary> 
/// <param name="s"></param> 
/// <returns></returns> 
private static string String2Json(String s)
{
System.Text.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 '
':
sb.Append("\
"); break;
case '\r':
sb.Append("\\r"); break;
case '\t':
sb.Append("\\t"); break;
default:
sb.Append(c); break;
}
}
return sb.ToString();
}
/// <summary> 
///       、   、    
/// </summary> 
/// <param name="str"></param> 
/// <param name="type"></param> 
/// <returns></returns> 
private static string StringFormat(string str, Type type)
{
if (type == typeof(string))
{
str = String2Json(str);
str = "\"" + str + "\"";
}
else if (type == typeof(DateTime))
{
str = "\"" + Convert.ToDateTime(str).ToShortDateString() + "\"";
}
else if (type == typeof(bool))
{
str = str.ToLower();
}

if (str.Length == 0)
str = "\"\"";

return str;
}
}