Multiple Dropzone and Linq Items not work

[schorges]

How can i only show the selected items from list?

Id like to drag Items in a Table with cols and rows, on change Items from itemas to ausgewahlteMitglieder
i have in all cols and rows the same list ....

@foreach(var line in timeRow)
       {                         
           <div class="row">                 
               <div class="col">
                   @line
               </div>
               @foreach(var spal in spalten)
               {
                   var itemas = ausgewahlteMitglieder.Where(x => x.PlanerTime == spal+line).ToList();
                   <div class="col">  
                       <Dropzone Items="itemas" TItem="MitgliederListe" OnItemDrop="(i) => i.PlanerTime = spal+line">
                          @context.UserVorname
                       </Dropzone>
                   </div>
               }
           </div>