Linq can't convert list to Observable collection

Question

 ObservableCollection<keyword> removeItems = this.keywordMatchItems.Where<keyword>(

                param => param.IsSelected).ToList<keyword>();

foreach (keyword lineItem in removeItems)

            {

               this.keywordMatchItems.Remove(removeItems);

            }

Cannot implicitly convert type 'System.Collections.Generic.List<keyword>' to 'System.Collections.ObjectModel.ObservableCollection<keyword>

Answer 1

Hi,

You cant cast a List<T> to an ObservableCollection<T>. You either need to use this ObservableCollection constructor overload or this extension method.

Regards,

---

Syed Mehroz Alam
My Blog | My Articles

Answer 2

Can you help me out with syntax.

Answer 3

i just changed my syntax to this and it's working fine

thanks a lot for your help

 

LIist<keyword> removeItems = this.keywordMatchItems.Where<keyword>(

                param => param.IsSelected).ToList<keyword>();

foreach (keyword lineItem in removeItems)

            {

               this.keywordMatchItems.Remove(lineItem);

            }

Cannot implicitly convert type 'System.Collections.Generic.List<keyword>' to 'System.Collections.ObjectModel.ObservableCollection<keyword>

 

Answer 4

Either try:

 ObservableCollection<keyword> removeItems = new   ObservableCollection<keyword> ( this.keywordMatchItems.Where<keyword>(param => param.IsSelected).ToList<keyword>() );

or if you included the extension method in the mentioned post, you can do:

 ObservableCollection<keyword> removeItems = this.keywordMatchItems.Where<keyword>(

                param => param.IsSelected).ToList<keyword>().ToObservableCollection() ;

---

Syed Mehroz Alam
My Blog | My Articles

Answer 5

Try This:

List<string> _objLst = new List<string>();

 _objLst.Add("Example1");

 _objLst.Add("Example2");

ObservableCollection<string> _objCollectionLst = new ObservableCollection<string>(_objLst);

 

Applicable in .Net framework 3.0 and above.

Answer 6

Hi,

You cant cast a List<T> to an ObservableCollection<T>. You either need to use this ObservableCollection constructor overload or this extension method.

Regards,

---

Syed Mehroz Alam 

You can use the ObservableCollection CTOR in the extension method, instead of the looping.

    public static class CollectionExtensions
    {
        public static ObservableCollection<T> ToObservableCollection<T>(this IEnumerable<T> enumerableList)
        {
            return enumerableList != null ? new ObservableCollection<T>(enumerableList) : null;
        }
    }