如何比较两个无序ListBox之间的项目

Question

I have 2 ListBoxs which has a set of items. The count between each ListBoxs can be same or different, if the count is same, I want to check if items between the ListBoxs are same. The items can be disordered or ordered as shown below:

ListBox1 = { "C++", "C#", "Visual Basic" };
ListBox2 = { "C#", "Visual Basic", "C++" };

Kindly help.

Answer 1

You could use Linq's All function

var ListBox1 = new string[] { "C++", "C#", "Visual Basic" };
var ListBox2 = new string[] { "C#", "Visual Basic", "C++" };
bool same = ListBox1.Length == ListBox2.Length 
   && ListBox1.All(s => ListBox2.Contains(s));

Answer 2

You can simply use HashSet:

var hashSet1 = new HashSet<string> { "C++", "C#", "Visual Basic" };
var hashSet2 = new HashSet<string> { "C#", "Visual Basic", "C++" };

var result = hashSet1.SetEquals(hashSet2);

Answer 3

I am assuming these two are two listbox controls

if (ListBox1.Items.Count == ListBox2.Items.Count)
{
    string[] listbox1arr = ListBox1.Items.OfType<string>().ToArray();
    string[] listbox2arr = ListBox2.Items.OfType<string>().ToArray();

    bool flag = listbox1arr.Intersect(listbox2arr).Count() > 0;

    MessageBox.Show(flag : "Items are not same" : "Items are same");
}