//获取一个获取特定属性的值的委托
/// <summary>
/// 获取一个获取特定属性的值的委托
/// <para>返回结果:
/// </para>一个object ReflectGet(object obj)类型的委托
/// </summary>
/// <param name="classType">需要获取属性的类</param>
/// <param name="propertyName">属性名称</param>
public static ReflectGet GetPropertyValue(Type classType, string propertyName)
{
string cacheKey = classType.FullName + SPACE + propertyName; //缓存标识符key
ReflectGet returnDelegate = null; //声明返回委托对象
if (cacheGet.TryGetValue(cacheKey, out returnDelegate)) //取出缓存中的委托,如果没有返回false
{
return(returnDelegate); //如果有,直接返回该委托
}
ReflectGet reflectGet = null;
returnDelegate = delegate(object obj) { return(reflectGet(obj)); }; //给返回委托赋值
cacheGet.Add(cacheKey, returnDelegate); //添加到缓存
PropertyInfo propertyInfo =
classType.GetProperty(propertyName, EasyIL.ALLATTR); //获得属性对象PropertyInfo
reflectGet = delegate(object obj) //使用系统反射方法
{
return(propertyInfo.GetGetMethod().Invoke(obj, null));
};
//开启新线程初始化动态方法
ThreadPool.QueueUserWorkItem(delegate(object o)
{
//Type returnType = classType.GetProperty(propertyName, EasyIL.ALLATTR).PropertyType;
Type returnType = typeof(object); //设置返回值类型
Type argType = typeof(object); //设置参数类型
EasyIL il = new EasyIL(returnType, classType.Module, argType); //建立简单EasyIL对象
//EasyIL:自定义类,用于简单操作IL生成器生成动态方法
//ILParameterBase obj = il.Convert(classType, il["0"]); //将参数0转换为
ILProperty objProperty =
il.CreateProperty(propertyInfo, il["0"]); //根据对象和属性对象 创建IL参数
//il[0]表示第0个参数的ILProperty形式,ILProperty:自定义类,用于在EasyIL中代表一个参数
il.Return(objProperty); //return 属性的值
//Type delegateType = typeof(delegateGeneric<,>).MakeGenericType(returnType, classType);
reflectGet = (ReflectGet)il.CreateDelegate(typeof(ReflectGet)); //返回一个委托
});
return(returnDelegate);
}
//获取一个获取特定字段的值的委托
/// <summary>
/// 获取一个获取特定字段的值的委托
/// <para>返回结果:
/// </para>一个object ReflectGet(object obj)类型的委托
/// </summary>
/// <param name="classType">需要获取字段的类</param>
/// <param name="fieldName">字段名称</param>
public static ReflectGet GetFieldValue(Type classType, string fieldName)
{
ReflectGet returnDelegate;
string cacheKey = classType.FullName + SPACE + fieldName;
if (cacheGet.TryGetValue(cacheKey, out returnDelegate))
{
return(returnDelegate);
}
cacheGet.Add(cacheKey, returnDelegate);
FieldInfo fieldInfo = classType.GetField(fieldName, EasyIL.ALLATTR);
ReflectGet reflectGet = delegate(object obj)
{
return(fieldInfo.GetValue(obj));
};
ThreadPool.QueueUserWorkItem(delegate(object o)
{
Type returnType = typeof(object);
Type argType = typeof(object);
EasyIL il = new EasyIL(returnType, classType.Module, argType);
ILField objfield = il.CreateField(fieldInfo, il["0"]);
il.Return(objfield);
reflectGet = (ReflectGet)il.CreateDelegate(typeof(ReflectGet));
});
returnDelegate = delegate(object obj) { return(reflectGet(obj)); };
return(returnDelegate);
}
