/// <summary>
/// 设置一个对象的某个字段的值
/// </summary>
/// <param name="from">要设置值的对象</param>
/// <param name="fieldName">要设置值的字段名</param>
/// <param name="fieldValue">要设置的值</param>
public static void Set(object from, string fieldName, object fieldValue)
{
//如果来源对象为空，则无法设置值
if (from == null)
{
return;
}
//获取到来源对象的类型
Type fromType = from.GetType();
//如果来源类型是值类型或枚举类型，也无法设置值
if (fromType.IsValueType || fromType.IsEnum)
{
return;
}
//如果来源类型是键值对，直接设置即可
else if (from is IDictionary)
{
(from as IDictionary)[fieldName] = fieldValue;
}
//如果来源对象是数据行，则调用RowUtil进行设置
else if (from is DataRow)
{
RowUtil.Set(from as DataRow, fieldName, fieldValue);
}
//如果来源对象是Json对象，则将值转换为JValue然后进行设置
else if (from is JObject)
{
(from as JObject)[fieldName] = new JValue(fieldValue);
}
//如果来源对象是一个类，则根据类型进行设置值
else if (fromType.IsClass)
{
Set(fromType, from, fieldName, fieldValue);
}
}
/// <summary>
/// 获取一个对象的值
/// </summary>
/// <param name="from">要取值的对象</param>
/// <param name="fieldName">要取值的字段</param>
/// <returns></returns>
public static object Get(object from, string fieldName)
{
//初始化返回值
object result = null;
//如果来源对象不为空就开始取值
if (from != null)
{
//获取来源对象的类型
Type fromType = from.GetType();
//如果是值类型或者枚举类型，是不包含key的，无法获取
if (fromType.IsValueType || fromType.IsEnum)
{
result = null;
}
//如果是键值对类型，则用DictionaryUtil获取
else if (from is IDictionary)
{
result = DictionaryUtil.Get(from as IDictionary, fieldName);
}
//如果是数据行，则用RowUtil获取
else if (from is DataRow)
{
result = RowUtil.Get(from as DataRow, fieldName);
}
//如果是Json对象，则直接以集合的形式获取
else if (from is JObject)
{
result = Get((from as JObject)[fieldName]);
}
//如果是一个类
else if (fromType.IsClass)
{
//反射获取到和要取值的字段名一样的属性
PropertyInfo property = fromType.GetProperty(fieldName);
//如果属性存在，就获取属性的值
if (property != null)
{
result = property.GetValue(from);
}
else
{
//否则获取同名字段
FieldInfo field = fromType.GetField(fieldName);
//如果字段存在，就获取字段的值
if (field != null)
{
result = field.GetValue(from);
}
}
}
//当到这一步，如果返回结果不是空的话
if (result != null)
{
//获取到返回结果的类型
Type resultType = result.GetType();
Type genericType = null;
//如果返回结果是泛型，再获取泛型的类型
if (resultType.IsGenericType)
{
genericType = resultType.GetGenericArguments().FirstOrDefault();
}
//如果返回结果是Json数组或者数组，或者泛型是Json对象，则把返回结果转换为List的形式，并把数组中的Json对象转换为键值对
if (result is JArray || result is ArrayList || (genericType != null && (genericType == typeof(JObject) || genericType.FullName == "System.Object")))
{
IList fromList = result as IList;
IList toList = ConvertList(fromList);
result = toList;
}
//如果返回结果就是个Json对象，则把Json对象转换为键值对
else if (result is JObject)
{
result = result.ToDictionary();
}
}
}
return(result);
}
