列表框项目字符串

Question

This should be easy, but I'm failing to do this. I have listbox with checkbox option turned on. So I'd like to have selected items in one string. Like this:

item1,item4,item9

and so on.

Notice that they should be divided by "," and last comma deleted.

Tried something like this, but won't work:

StringBuilder sb = new StringBuilder();
for (int i = 0; i < lb1.Items.Count; i++)
    sb.Append(lb1.Items[i].Selected ? lb1.Items[i].Text + "," : "");
TextBox1.Text = sb.ToString();

Answer 1

You could try (uses ASPxListBox.SelectedItems ):

var selectedItems = 
    String.Join(",", lb1.SelectedItems.Select(i => i.ToString()));

Or if you're using an older version of .NET without LINQ:

List<string> values = new List<string>();

foreach(object o in lb1.SelectedItems)
    values.Add(o.ToString());

string selectedItems = String.Join(",", values);