Reverse Engineering a LINQ Statement

Question

I'm trying to reverse engineer a LINQ statement, any help will be greatly appreciated.

bool isAllUnchecked = !lvTech.Items.Cast<ListViewItem>().Any(lvItem => lvItem.Checked);

My progress so far;

bool isAllUnchecked = true;
foreach(ListviewItem item in lvTech.Items)
{
    if(item.checked)
    {
      isAllUnchecked = false;
    }
}

I'm using Resharper and its' convert to LINQ didn't show up so far. What am I missing?

Answer 1

I think it should be:

bool isAllUnchecked = false; // Variable name doesn't fit what you're doing
                             // Don't forget to change.
foreach(ListViewItem item in lvTech.Items)
{
    if(item.checked)
    {
      isAllUnchecked = true;
      break;
    }
}

Any() checks if there's any item that satisfies the condition, if so it returns true .

And you should rename your variable isAnyChecked or you should negate the result of the query.

Answer 2

This would be the right loop (at least it is what the variable name suggests):

bool isAllUnchecked = true;
foreach(ListviewItem item in lvTech.Items)
{
    if(item.checked)
    {
      isAllUnchecked = false;
      break;
    }
}

This is the same with LINQ:

bool isAllUnchecked = lvTech.Items.Cast<ListViewItem>()
                                  .All(lvItem => !lvItem.Checked);