Question

I need to find an equivelent to the following code for use in a portable library:

    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

The BindingFlags don’t seem to exist. The System.Reflection.PropertyInfo is a valid type, but I can’t figure out how to fill it. Any suggestions?

Answer 1

For Windows 8/Windows Phone 8, a lot of this Reflection functionality has been moved to a new TypeInfo class. You can find more information in this MSDN doc. For information including the runtime properties (including those that are inherited for example), you can use the new RuntimeReflectionExtensions class as well (where filtering can be done simply via LINQ).

Though this is C# code (my apologies :)), here is something fairly equivalent using this new functionality:

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);
    }
}

This code is even simpler if you only care about properties declared on the class itself:

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

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