How to remove the items in listbox1 that is in listbox2?

Question

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Hi can you help me remove the items in ListBox1 with the same value on ListBox2?

The output of what I have tried is like this:

List1
1
2
3
4
5

List 2
2
5
1

What I have tried:

Here is my code:

C#

ListBox1.Items.Add(filename);

Label1.Text = ListBox1.Items.Count.ToString();

int randVal = rand.Next(z.Length);
string y;

if (ListBox2.Items.Count <= 4)
{
    y = z[randVal].ToString();

    ListItem listItems = new ListItem(y);

    if (!ListBox2.Items.Contains(listItems))
    {
         ListBox2.Items.Add(y);
    }
}

Label2.Text = ListBox2.Items.Count.ToString();

Posted 25-Mar-16 7:22am

Member 11525563

Updated 25-Mar-16 7:56am

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BillWoodruff 25-Mar-16 20:51pm

Why are you generating random ListItem values ?

1 solution

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F-ES Sitecore · Answer 1 · 2016-03-25T07:56:00

This line

if (!ListBox2.Items.Contains(listItems))

is checking if the Items collection contains the listItems object, which is doesn't as you have just created it, you haven't added it to the Items collection. What you really want to do is check if ListBox2.Items has a ListItem that has "y" as it's value.

C#

if (ListBox2.Items.FindByValue(listItems.Value) == null)

There is also a FindByText function if that's what you're after.