CODEWITHSUNDEEP
c#winformsif-statementlistbox
Edwin Torres
Edwin Torres

Reputation: 483

How to make if statement that checks if multple listBoxes are empty or not?

How do I make an if statement that asks if multiple listBoxes are empty or not?

This is what I have so far...is it possible to combine it into one single if statement?

    if (listBoxEmails.Items.Count < 1)
    {
     //Perform action
    }

    if (listBoxWebsites.Items.Count < 1)
    {
    //Perform action
    }

    if (listBoxComments.Items.Count < 1)
    {
       //Perform action
    }

Upvotes: 1

Views: 88

Answers (5)

d.moncada
d.moncada

Reputation: 17402

Is this in WPF or WinForms? You could do:

    var performAction = (!listBoxEmails.Items.IsEmpty | !listBoxWebsites.Items.IsEmpty | !listBoxComments.Items.IsEmpty);
    if (performAction)
    {

    }

Upvotes: 0

Icemanind
Icemanind

Reputation: 48686

If you are trying to get a count from ALL list boxes on your form, you can do this:

if (Controls.OfType<ListBox>().Any(z => z.Items.Count < 1))
{
    // Do Something
}

The magic is that if you delete or add any more list boxes on your form, you won't have to change any code. If you want to grab specific listbox's, you could set the Tag property on all the listbox's you want included to something like CountedListBox and then do this:

if (Controls.OfType<ListBox>().Any(z => z.Items.Count < 1 && ((string)z.Tag == "CountedListBox")))
{
    // Do something
}

Upvotes: 3

Yogi
Yogi

Reputation: 9739

You can have list boxes in some collection and using linq you can find in one statement if the any of the list is empty or not. Something like this. Of course there can be different approaches for list box collections.

    private void ValidateListBoxes()
    {
        List<ListBox> listBoxes = new List<ListBox>();
        listBoxes.Add(listBoxEmails);
        listBoxes.Add(listBoxWebsites);
        listBoxes.Add(listBoxComments);

        bool isContainingEmptyList = listBoxes.Any(l => l.Items.Count < 1 || l.Items.Count==0);
    }

Upvotes: 2

missellorin
missellorin

Reputation: 389

if (listBoxEmails.Items.Count >= 0 && listBoxWebsites.Items.Count >= 0 && 

    listBoxComments.Items.Count >= 0)
    {
    //perform action

    }

Upvotes: 1

fhnaseer
fhnaseer

Reputation: 7277

Here is the most simple solution I can think of,

if (listBoxEmails.Items.Any() && listBoxWebsites.Items.Any() && listBoxComments.Items.Any())
{
    // Do something here,
 }

Upvotes: 0

Related Questions