![](/img/trans.png)
[英]Get nested generic type object's property and attribute values through Reflection at run time
[英]Find generic object property attribute value using reflection at run time
我創建了一個自定義屬性類,用於在將對象導出為CSV格式時控制某些方面。
[AttributeUsage(AttributeTargets.Property)]
public class MyCustomAttribute : Attribute
{
public bool Exportable { get; set; }
public string ExportName{ get; set; }
}
這是我要導出的對象之一的示例:
public class ObjectA
{
[MyCustom(Exportable = true, ExportColumnName = "Column A")]
public string PropertyA {get; set; }
[MyCustom(Exportable = false)]
public string PropertyB {get; set; }
public string PropertyC {get; set; }
}
我創建接受通用對象的Export函數。
public void Export<T>(T exportObject)
{
//I get the property name to use them as header
var properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (var property in properties)
{
//find the list of attribute of this property.
var attributes = Attribute.GetCustomAttributes(property, false);
//if attribute "Exportable" value is false or doesn't exists then continue foreach
//else continue export logic
}
}
我的問題是如何使用反射來查找該屬性是否具有“可導出”屬性,以及該屬性是否為true?
請注意,我可以傳入任何通用對象,在這種情況下,我希望最終導出包含一個包含PropertyA數據的列,並且我的列標題值為“ Column A”
您在正確的道路上,將泡沫體替換為:
var attribute = property.GetCustomAttribute<MyCustomAttribute>();
if(attribute != null)
{
bool isExportable = attribute.Exportable;
// rest of the code
}
@Sohaib Jundi給出了很好的答案。 如果出於某種原因決定創建更多自定義屬性,則可以執行以下類似操作:
public void Export<T>(T exportObject)
{
var properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (var property in properties)
{
var attributes = Attribute.GetCustomAttributes(property, false);
foreach (var attribute in attributes)
{
if (attribute is MyCustomAttribute)
{
if (((MyCustomAttribute)attribute).Exportable)
{
}
}
if (attribute is MyCustomAttribute2)
{
if (((MyCustomAttribute2)attribute).AnotherThing)
{
}
}
}
}
}
這樣,您可以檢查對象的多個屬性
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.