Question

how can i remove multiple items from observablecollection in silverlight.in my project i have one datagrid populating more than one items.in every row contain one checkbox also.if i select more than one row by selecting checkbox and click delete button ,i want to delete all the item from the collection.

public void delete(object parameter)
    {
      foreach (var x in Book)
        {
              if (x.Ischeck == true)
                 {
                    Book.Remove(x);
                  }
         }
     } 

it cause error.can’t change observablecollection

Answer 1

You can use below mentioned code snippet instead:

foreach (var x in Book.ToList())
{
    if (x.Ischeck)
    {
        Book.Remove(x);
    }
}

OR

for (int i = Book.Count - 1; i >= 0; i--)
{
    if (Book[i].Ischeck)
    {
        Book.RemoveAt(i);
    }
}