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[英]Can I use PrivateObject class or Reflection to access a field in a private class?
[英]How to access a private base class field using Reflection
我正在嘗試在BaseClass類型的變量上設置私有的“可見”字段。
我已經成功訪問了ChildClass類型的變量,以及BaseClass上“ visible”字段的FieldInfo。
但是,當我嘗試設置/獲取字段的值時,出現錯誤System.Runtime.Remoting.RemotingException:遠程處理無法在類型'BaseClass'上找到字段'visible'。
那么,是否有一種方法可以將“ ChildClass”類型的變量“強制轉換”為BaseClass,以便進行反射?
編輯:我正在使用的確切代碼:
// get the varible
PropertyInfo pi = overwin.GetProperty("Subject", BindingFlags.Instance|BindingFlags.Public);
CalcScene scene = (CalcScene) pi.GetValue(inwin, null);
// <<< scene IS ACTUALLY A TYPE OF DisplayScene, WHICH INHERITS FROM CalcScene
// get the 'visible' field
Type calScene = typeof(CalcScene);
FieldInfo calVisible = calScene.GetField("visible",BindingFlags.Instance|BindingFlags.NonPublic);
// set the value
calVisible.SetValue(scene, true); // <<< CANNOT FIND FIELD AT THIS POINT
確切的類結構:
class CalcScene
{
private bool visible;
}
class DisplayScene : CalcScene
{
}
你可以這樣嘗試
class B
{
public int MyProperty { get; set; }
}
class C : B
{
public string MyProperty2 { get; set; }
}
static void Main(string[] args)
{
PropertyInfo[] info = new C().GetType().GetProperties();
foreach (PropertyInfo pi in info)
{
Console.WriteLine(pi.Name);
}
}
產生
MyProperty2 MyProperty
以下是一些代碼,演示了獲取字段與屬性之間的區別:
public static MemberInfo GetPropertyOrField(this Type type, string propertyOrField)
{
MemberInfo member = type.GetProperty(propertyOrField, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
if (member == null)
member = type.GetField(propertyOrField, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
Debug.Assert(member != null);
return member;
}
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