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我正在尋找一種方法來選擇在單個LINQ語句中具有特定值的特定自定義屬性的屬性。選擇具有特定屬性值的屬性
我得到的屬性,我想要的屬性,但我不知道如何選擇其特定的值。
<AttributeUsage(AttributeTargets.Property)>
Public Class PropertyIsMailHeaderParamAttribute
Inherits System.Attribute
Public Property HeaderAttribute As String = Nothing
Public Property Type As ParamType = Nothing
Public Sub New()
End Sub
Public Sub New(ByVal headerAttribute As String, ByVal type As ParamType)
Me.HeaderAttribute = headerAttribute
Me.Type = type
End Sub
Public Enum ParamType
base = 1
open
closed
End Enum
End Class
private MsgData setBaseProperties(MimeMessage mailItem, string fileName)
{
var msgData = new MsgData();
Type type = msgData.GetType();
var props = from p in this.GetType().GetProperties()
let attr = p.GetCustomAttributes(typeof(Business.IT._21c.AddonFW.PropertyIsMailHeaderAttribute), true)
where attr.Length == 1
select new { Property = p, Attribute = attr.FirstOrDefault() as Business.IT._21c.AddonFW.PropertyIsMailHeaderAttribute };
}
[解決方法]
var baseProps = from p in this.GetType().GetProperties()
let attr = p.GetCustomAttribute<PropertyIsMailHeaderParamAttribute>()
where attr != null && attr.Type == [email protected]
select new { Property = p, Attribute = attr as Business.IT._21c.AddonFW.PropertyIsMailHeaderParamAttribute };
是不是第一類的代碼,VB.NET中的PropertyIsMailHeaderParamAttribute? –
是的,我們的庫是用VB.NET編寫的,這是我從中獲得CustomAttribute的地方。不要問爲什麼..犯了錯誤。如果你們想知道的話,我也改變了這些類的名字。 – OhSnap