如何在Windows Store/WP8/WinRT的可移植类库中使用反射？

Question

我需要找到以下代码的等价物,以便在便携式库中使用:

    Public Overridable Function GetPropertyValue(ByVal p_propertyName As String) As Object
        Dim bf As System.Reflection.BindingFlags
        bf = Reflection.BindingFlags.IgnoreCase Or Reflection.BindingFlags.Public Or Reflection.BindingFlags.Instance Or Reflection.BindingFlags.NonPublic
        Dim propInfo As System.Reflection.PropertyInfo = Me.GetType().GetProperty(p_propertyName, bf)
        Dim tempValue As Object = Nothing

        If propInfo Is Nothing Then
            Return Nothing
        End If

        Try
            tempValue = propInfo.GetValue(Me, Nothing)

        Catch ex As Exception
            Errors.Add(New Warp10.Framework.BaseObjects.BaseErrorMessage(String.Format("Could not Get Value from Property {0}, Error was :{1}", p_propertyName, ex.Message), -1))
            Return Nothing
        End Try

        Return tempValue

    End Function

BindingFlags似乎不存在.System.Reflection.PropertyInfo是一个有效的类型,但我无法弄清楚如何填充它.有什么建议？

Answer 1

对于Windows 8/Windows Phone 8,许多此Reflection功能已移至新的TypeInfo类.您可以在此MSDN文档中找到更多信息.有关包括运行时属性(包括那些继承的属性)的信息,您也可以使用新的RuntimeReflectionExtensions类(其中可以通过LINQ简单地进行过滤).

虽然这是C#代码(我的道歉:)),但这里使用这个新功能是完全相同的:

public class TestClass
{
    public string Name { get; set; }

    public object GetPropValue(string propertyName)
    {
        var propInfo = RuntimeReflectionExtensions.GetRuntimeProperties(this.GetType()).Where(pi => pi.Name == propertyName).First();
        return propInfo.GetValue(this);
    }
}

如果您只关心在类本身声明的属性,那么此代码甚至更简单:

public class TestClass
{
    public string Name { get; set; }

    public object GetPropValue(string propertyName)
    {
        var propInfo = this.GetType().GetTypeInfo().GetDeclaredProperty(propertyName);
        return propInfo.GetValue(this);
    }
}