Hi Martin,

I think that you can do something like this:

var homePage = CurrentPage.AncestorsOrSelf(1).First();
var item = homePage.Descendants("Presentation").Where("PresentationId = @0", PresId).First();

if(item.HasValue("PresentationId"))
{
DO SOMETHING;
}

Or you could try something like this too.

var homePage = CurrentPage.AncestorsOrSelf(1).First();

if(!string.IsNullOrWhiteSpace(homePage.Descendants("Presentation").Where("PresentationId = @0", PresId).First()))
{
DO SOMETHING;
}

Try to see these Razor cheatsheets https://our.umbraco.org/projects/developer-tools/umbraco-v6-mvc-razor-cheatsheets, I know it says for Umbraco 6, but you can also use it for Umbraco 7 it´s an pdf file with the different methods in. As you can see you have HasValue to check if the fields contains any value, and you have HasProperty to check if the property is on the document type.

There are a cheatsheet for the dynamic version of Razor and one for the strongly typed version.

Hope this can help you further.

/Dennis

Thanks Dennis,

I didn't get it to work, but I tested a try catch block instead, which I got to work. So a little bit of work-around but it running.

// Martin

Hi Martin

Just being curious - But would you mind sharing the code you ended up making?

Cheers, Jan

Absolutely Jan, see below.

I use a boolean variable which is set to false if an exception is thrown. It works fine for my purpose as of now.

    bool FastBild = true;

    try
    {
        @*To check if both fastid AND image exist *@
    var test = homePage.Descendants("FastighetPresentation").Where("FastighetsId = @0", @row.Fastid).First();
    var test2 = test.Bilds.First();
    }
    catch (Exception ex)
    {
        @*ex.Message;*@
        FastBild = false;
    }

    if(FastBild == true)
    {
     @*DO SOMETHING *@               
    }

Thanks for the hint Dan. FirstOrDefault I did not know of until now.

I first got an compiler error:

Compiler Error Message: CS1977: Cannot use a lambda expression as an argument to a dynamically dispatched operation without first casting it to a delegate or expression tree type

So I needed to change the code a little bit, but now it works fine without having a try catch block:

(Note, I have also renamed the properties name)

var homePage = CurrentPage.AncestorsOrSelf(1).First(); //homePage = Model.Content.AncestorOrSelf(1) did not work

var fastighet = homePage.Descendants("FastighetPresentation").Where("FastighetsId = @0", Fastid).FirstOrDefault();
var bilder = fastighet.Bilds.FirstOrDefault(); 

if (bilder != null)
{
 // do something
 }

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