Creating objects from xml error {"Value cannot be null.\r\nParameter name: element"}

Question

I need to create a list of objects parsing an XML document. Issue appears when projecting to AdvertisementFullScreen

I receive this error:

{"Value cannot be null.\r\nParameter name: element"}

My code:

var advFs = loadedData.Element("xxx")
                           .Elements("advertisementsFullScreen")
                           .Elements("advertisement") // RESULT BELOW
                           .Select(x=>new AdvertisementFullScreen()
                           {
                               Id = (int)x.Element("id"),
                               ImageUrl = (string)x.Element("imageUrl"),
                               DisplayTime = new TimeSpan(0, 0, (int)x.Element("displayTime"))
                           }).ToList();

Result before projecting is:

[0] = <advertisement id="7001" imageUrl="C:/xxx/Test-data/data-offline/Assets/advertisementsFullScreen/1.png" displayTime="5" isSelfPromo="1"></advertisement>

Are you sure that casting something to int will convert it? You should use int.Parse or Convert.ToInt32 instead. — nvoigt
– nvoigt, Commented Jun 13, 2014 at 7:50

Ondrej Svejdar · Accepted Answer · 2014-06-13 07:54:09Z

2

You're selecting Element(), but id, imageUrl, displayTime are not elements - they're attributes.

Modified query (just the important parts):

Id = (int)x.Attribute("id"),
ImageUrl = (string)x.Attribute("imageUrl"),
DisplayTime = new TimeSpan(0, 0, (int)x.Attribute("displayTime"))

edited Jun 13, 2014 at 7:54

answered Jun 13, 2014 at 7:47

Ondrej Svejdar

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