C# 如何获取完成在属性值中建立的requisit的所有类属性?
为了清楚起见,举个小例子:C# 如何获取完成在属性值中建立的requisit的所有类属性?,c#,reflection,properties,filter,attributes,C#,Reflection,Properties,Filter,Attributes,为了清楚起见,举个小例子: public class Book { [MyAttrib(isListed = true)] public string Name; [MyAttrib(isListed = false)] public DateTime ReleaseDate; [MyAttrib(isListed = true)] public int PagesNumber; [MyAttrib(isListed = false)
public class Book
{
[MyAttrib(isListed = true)]
public string Name;
[MyAttrib(isListed = false)]
public DateTime ReleaseDate;
[MyAttrib(isListed = true)]
public int PagesNumber;
[MyAttrib(isListed = false)]
public float Price;
}
问题是:如果在MyAttrib
上设置了bool参数isListed
,如何仅获取属性
这就是我得到的:
PropertyInfo[] myProps = myBookInstance.
GetType().
GetProperties().
Where(x => (x.GetCustomAttributes(typeof(MyAttrib), false).Length > 0)).ToArray();
myProps
获取了Book
中的所有属性,但现在,当其isListed
参数返回false时,我无法确定如何排除它们
foreach (PropertyInfo prop in myProps)
{
object[] attribs = myProps.GetCustomAttributes(false);
foreach (object att in attribs)
{
MyAttrib myAtt = att as MyAttrib;
if (myAtt != null)
{
if (myAtt.isListed.Equals(false))
{
// if is true, should I add this property to another PropertyInfo[]?
// is there any way to filter?
}
}
}
}
任何建议都将非常宝贵。提前感谢。我认为使用Linq的查询语法会更容易一些
var propList =
from prop in myBookInstance.GetType()
.GetProperties()
let attrib = prop.GetCustomAttributes(typeof(MyAttrib), false)
.Cast<MyAttrib>()
.FirstOrDefault()
where attrib != null && attrib.isListed
select prop;
var-propList=
从myBookInstance.GetType()中的prop
.GetProperties()
让attrib=prop.GetCustomAttributes(typeof(MyAttrib),false)
.Cast()
.FirstOrDefault()
attrib在哪里!=null&&attrib.isListed
选择道具;
我认为使用Linq的查询语法会容易一些
var propList =
from prop in myBookInstance.GetType()
.GetProperties()
let attrib = prop.GetCustomAttributes(typeof(MyAttrib), false)
.Cast<MyAttrib>()
.FirstOrDefault()
where attrib != null && attrib.isListed
select prop;
var-propList=
从myBookInstance.GetType()中的prop
.GetProperties()
让attrib=prop.GetCustomAttributes(typeof(MyAttrib),false)
.Cast()
.FirstOrDefault()
attrib在哪里!=null&&attrib.isListed
选择道具;