public static object GetPropertyValue<T>(this T model, string name)
{
var type = model.GetType();
var property = type.GetProperty(name);
if (property == null)
return null;
//传参 类型为type
var getParameter = Expression.Parameter(typeof(T), "model");
//把参数T类型转为真实类型
var convertParameter = Expression.Convert(getParameter, type);
//获取属性
var getProperty = Expression.Property(convertParameter, property);
//转为object类型
var convertProperty = Expression.Convert(getProperty, typeof(object));
//生成表达式
var lambda = Expression.Lambda<Func<T, object>>(convertProperty, getParameter).Compile();
return lambda(model);
}
public static void SetPropertyValue<T, TResult>(this T model, string name, TResult value)
{
var type = model.GetType();
var p = type.GetProperty(name);
var paramObj = Expression.Parameter(type, "obj");
var paramVal = Expression.Parameter(typeof(TResult), "val");
var body = Expression.Call(paramObj, p.GetSetMethod(), paramVal);
var f = Expression.Lambda<Action<T, TResult>>(body, paramObj, paramVal).Compile();
f(model, value);
}
{
var type = model.GetType();
var property = type.GetProperty(name);
if (property == null)
return null;
//传参 类型为type
var getParameter = Expression.Parameter(typeof(T), "model");
//把参数T类型转为真实类型
var convertParameter = Expression.Convert(getParameter, type);
//获取属性
var getProperty = Expression.Property(convertParameter, property);
//转为object类型
var convertProperty = Expression.Convert(getProperty, typeof(object));
//生成表达式
var lambda = Expression.Lambda<Func<T, object>>(convertProperty, getParameter).Compile();
return lambda(model);
}
public static void SetPropertyValue<T, TResult>(this T model, string name, TResult value)
{
var type = model.GetType();
var p = type.GetProperty(name);
var paramObj = Expression.Parameter(type, "obj");
var paramVal = Expression.Parameter(typeof(TResult), "val");
var body = Expression.Call(paramObj, p.GetSetMethod(), paramVal);
var f = Expression.Lambda<Action<T, TResult>>(body, paramObj, paramVal).Compile();
f(model, value);
}