/// <summary>
/// 获取指定属性信息（非String类型存在装箱与拆箱）
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="select"></param>
/// <returns></returns>
public static PropertyInfo GetPropertyInfo<T>(Expression<Func<T,dynamic>> select)
{
var body = select.Body;
if (body.NodeType == ExpressionType.Convert)
{
var o = (body as UnaryExpression).Operand;
return (o as MemberExpression).Member as PropertyInfo;
}
else if (body.NodeType == ExpressionType.MemberAccess)
{
return (body as MemberExpression).Member as PropertyInfo;
}
return null;
}
/// <summary>
/// 获取指定属性信息（需要明确指定属性类型，但不存在装箱与拆箱）
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="TR"></typeparam>
/// <param name="select"></param>
/// <returns></returns>
public static PropertyInfo GetPropertyInfo<T, TR>(Expression<Func<T, TR>> select)
{
var body = select.Body;
if (body.NodeType == ExpressionType.Convert)
{
var o = (body as UnaryExpression).Operand;
return (o as MemberExpression).Member as PropertyInfo;
}
else if (body.NodeType == ExpressionType.MemberAccess)
{
return (body as MemberExpression).Member as PropertyInfo;
}
return null;
}
/// <summary>
/// 获取类型的所有属性信息
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="select"></param>
/// <returns></returns>
public static PropertyInfo[] GetPropertyInfos<T>(Expression<Func<T,dynamic>> select)
{
var body = select.Body;
if (body.NodeType == ExpressionType.Parameter)
{
return (body as ParameterExpression).Type.GetProperties();
}
else if(body.NodeType==ExpressionType.New)
{
return (body as NewExpression).Members.Select(m => m as PropertyInfo).ToArray();
}
return null;
}