ToJson转换类

最新推荐文章于 2025-06-04 09:05:44 发布

转载最新推荐文章于 2025-06-04 09:05:44 发布 · 760 阅读

文章标签：

#string #dataset #json #object #table #system

本文介绍了一个实用的JSON转换工具类，能够将各种类型的数据结构（如对象、集合、DataTable等）转换成JSON字符串。该工具类支持.NET环境，并提供了详细的实现代码。

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偷习别人的一个ToJson转换类，转载之，以备日后参考，谢谢原作者。

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using System;
using System.Reflection;
using System.Collections;
using System.Data;
using System.Data.Common;
/// <summary>
/// Json转换工具
/// 作者：吴奇凡
/// 用于转换基本的对象
/// </summary>
public class FxJson
{
     private FxJson()
     {
     }
     /// <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 ToJsonAll(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 string || objectValue is Guid || objectValue is TimeSpan)
             {
                 value = "'" + objectValue + "'";
             }
             else if (objectValue is IEnumerable)
             {
                 value = ToString((IEnumerable)objectValue);
             }
             else
             {
                 value = objectValue.ToString();
             }
             jsonString += "/"" + propertyInfo[i].Name + "/":" + value + ",";
         }
         return FxJson.DeleteLast(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 ToString(IEnumerable array)
     {
         string jsonString = "[";
         foreach (object item in array)
         {
             jsonString += FxJson.ToJsonAll(item) + ",";
         }
         return FxJson.DeleteLast(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 = item+",";
         }
         return FxJson.DeleteLast(jsonString) + "]";
     }
     /// <summary>
     /// 删除结尾字符
     /// </summary>
     /// <param name="str">需要删除的字符</param>
     /// <returns>完成后的字符串</returns>
     private static string DeleteLast(string str)
     {
         if (str.Length > 1)
         {
             return str.Substring(0, str.Length - 1);
         }
         return str;
     }
     /// <summary>
     /// Datatable转换为Json
     /// </summary>
     /// <param name="table">Datatable对象</param>
     /// <returns>Json字符串</returns>
     public static string ToString(DataTable table)
     {
         string jsonString = "[";
         DataRowCollection drc = table.Rows;
         for (int i = 0; i < drc.Count; i++)
         {
             jsonString += "{";
              foreach (DataColumn column in table.Columns)
              {
                  jsonString += "/"" + column.ColumnName + "/":";
                  if (column.DataType == typeof(DateTime) || column.DataType== typeof( string))
                  {
                      jsonString += "/"" + drc[i][column.ColumnName] + "/",";
                  }
                  else
                  {
                      jsonString += drc[i][column.ColumnName] + ",";
                  }
              }
              jsonString = DeleteLast(jsonString) + "},";
         }
         return DeleteLast(jsonString) + "]";
     }
     /// <summary>
     /// DataReader转换为Json
     /// </summary>
     /// <param name="dataReader">DataReader对象</param>
     /// <returns>Json字符串</returns>
     public static string ToString(DbDataReader dataReader)
     {
         string jsonString = "[";
         while (dataReader.Read())
         {
             jsonString += "{";
             for (int i = 0; i < dataReader.FieldCount; i++)
             {
                 jsonString += "/"" + dataReader.GetName(i) + "/":";
                 if (dataReader.GetFieldType(i) == typeof(DateTime) || dataReader.GetFieldType(i) == typeof(string))
                 {
                     jsonString += "/"" + dataReader[i] + "/",";
                 }
                 else
                 {
                     jsonString += dataReader[i] + ",";
                 }
             }
             jsonString = DeleteLast(jsonString) + "}";
         }
         dataReader.Close();
         return DeleteLast(jsonString) + "]";
     }
     /// <summary>
     /// DataSet转换为Json
     /// </summary>
     /// <param name="dataSet">DataSet对象</param>
     /// <returns>Json字符串</returns>
     public static string ToString(DataSet dataSet)
     {
         string jsonString = "{";
         foreach (DataTable table in dataSet.Tables)
         {
             jsonString += "/"" + table.TableName + "/":" + ToString(table) + ",";
         }
         return jsonString = DeleteLast(jsonString) + "}";
     }
}