实现任意数据类型转成json格式输出代码,Asp.NET代码库,德仔网

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【Asp.NET】实现任意数据类型转成json格式输出
作者: / 发布于2016/4/29/ 722
/// List转成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转成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>   
/// 对象转换为Json字符串   
/// </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 + "}";  
}  

/// <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 + "]";  
}  

/// <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 + "]";  
}  

/// <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].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(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>  
private 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 '/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>  
/// <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 = "/"" + str + "/"";  
 }  
 else if (type == typeof(bool))  
 {  
  str = str.ToLower();  
 }  
 return str;  
}
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