Deprecated Properties in c#

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Hi All,

I am wondering if this is possible as i have not yet seen anything along these lines.

Would it be possible to be able to display only deprecated properties in a property grid.

On a similar note could this also be done with non browsable attributes.

I cannot see a way of querying this or specifically populating the grid with only these items.

Thanks in advance George

Posted 1-Dec-13 21:53pm

gwithey

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BillWoodruff 2-Dec-13 5:14am

That's an interesting idea, but, I wonder how these Properties are now a problem for you, and why you wish to display them ? Perhaps for analyzing code before migrating it to later versions of the FrameWork ?

Is it not enough they show up in IntelliSense as struck-out Text, and, if you type one, you get a special pop-up telling you it's obsolete complete with a link ?

It is interesting that you can compile without error using one: if I type this.AutoScale = true; in WinForm code, using FrameWork 4.5, there's no compiler error even though AutoScale is, indeed, obsolete.

gwithey 2-Dec-13 6:30am

I wish to display them for regression testing of these properties to display any that are currently deprecated or non brawsable within a property grid.

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OriginalGriff · Accepted Answer · 2013-12-01T22:24:00

IFAIK, no - depreciated properties aren't changed in the class definition - they are depreciated via the documentation only.

There is however the ObsoleteAttribute Attribute[^] which you could pick up on via Reflection and display yourself. However, this does rely on the type being changed my MS to include the attribute - and that can't be guaranteed. Obviously, you need to use the "latest" version of the framework in order to check if a property is obsolete!

"Hi OriginalGriff,

Thanks for this, i have looked though the documentation and it is a useful resource for showing the currently deprecated properties dlls etc in .Net.

I have been trying to query the obsolete attribute using reflection but have not yet discovered a method of doing so and could not see anything which may lead me to this within the resource =s.

I suppose my original goal may seem odd but ideally i want to display depreciated,normal and non browsable properties in separate property grids. This is to allow testing of all attributes.

I just tried it quickly, and it's pretty simple:

C#

Type t = typeof(MyClass);
foreach (System.Reflection.PropertyInfo p in t.GetProperties())
    {
    var x = p.GetCustomAttributes(false).ToDictionary(a => a.GetType().Name, a => a);
    Console.WriteLine(p.Name);
    foreach (string k in x.Keys)
        {
        Console.WriteLine("   " + x[k]);
        if (x[k] is ObsoleteAttribute)
            {
            Console.WriteLine("   ****");
            }
        }
    }