Listbox data sorting C#
@k005 a écrit :
Hi @_gile
Is it that way?
private void btnSirala_Click(object sender, EventArgs e) { listBox1.OrderBy(s => int.Parse(Regex.Match(s, @"ø(\d+)").Groups[1].Value)) }
I hope not.
What is listbox1? I guess an instance of System.Windows.Forms.ListBox. If I'm right, the ListBox class does not implement IEnumerable<string>.
How do you get this collection of strings? What is the type of this collection ? Does this type implements IEnumerable<string> ? This is mandatory to use the Linq extension methods.
Sorry I do not understand what you're trying to achieve.
You just have to learn/undertsand that
- you can use the OrderBy Linq extension with objects which type implements IEnumerable<string> (as List<string> or string[])
- you can fill the ListBox.Items with this kind of objects
- The ListBox.Items type is ObjectCollection and can be casted into an IEnumerable<<string> using ListBox.Items.Cast<stirng>()
You have to get the items from the list box, cast the collection into an IEnumerable<string>, sort it with OrderBy, clear the list box items and re-fill it with the sorted IEnumerable<string>.
private void btnSirala_Click(object sender, EventArgs e)
{
var items = listBox1.Items
.Cast<string>()
.OrderBy(s => int.Parse(Regex.Match(s, @"ø(\d+)").Groups[1].Value))
.ToArray();
listBox1.Items.Clear();
listBox1.Items.AddRange(items);
}You won't learn anything if you're still waiting for someone to write the code for you. These are the basics of Windows forms that have nothing to do with the AutoCAD .NET API.
You didn't say you use a DataSource for the list box as said in the error message. If so, try:
private void btnSirala_Click(object sender, EventArgs e)
{
listBox1.DataSource = ((IList)listBox1.DataSource)
.Cast<string>()
.OrderBy(s => int.Parse(Regex.Match(s, @"ø(\d+)").Groups[1].Value))
.ToArray();
}
