search in listview

[sajjadlove]

I want that search in the listView by enter a text in the TextBox and use the textBox_TextCha nge event then refresh listView items.....

please F1.....

[ApocDev]

        // This should hold all of our items. Whenever you call
        // listView1.Items.Add() you should also add the item to this List
        private readonly List<ListViewItem> ListItems = new List<ListViewItem>();

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            List<ListViewItem> tmp = new List<ListViewItem>();

            if (string.IsNullOrEmpty(textBox1.Text))
            {
                // No text, so we just fill the list with our items!
                tmp = ListItems;
                goto INSERT_ITEMS;
            }

            // Store the text so we're not making pointless calls
            string txtLower = textBox1.Text.ToLower();

            // Iterate over all the items in our list
            // so we make sure we're searching *everything*
            foreach (ListViewItem item in ListItems)
            {
                // Simple flag to check if a subitem
                // has the search term.
                bool addItem = false;

                // This can either be StartsWith or Contains
                // Personally, StartsWith is more intuitive 
                // unless you decide to add more 'advanced'
                // searching. In that case, you'll want to
                // create a new searching method. (Or class)
                if (item.Text.ToLower().StartsWith(txtLower))
                {
                    // The first indexed item has our text.
                    // Don't bother checking subitems!!
                    tmp.Add(item);
                    continue;
                }

                foreach (ListViewItem subItem in item.SubItems)
                {
                    if (subItem.Text.ToLower().StartsWith(txtLower))
                    {
                        addItem = true;
                    }
                }

                // If a subitem of this item has the text
                // we need to add it.
                if(addItem)
                {
                    tmp.Add(item);
                }
            }

            // No real way around this unless you extract it
            // to another method. Which may be a good idea.
            INSERT_ITEMS:

            // Clear the current items.
            listView1.Items.Clear();

            // Add the correct items. :)
            foreach (ListViewItem item in tmp)
            {
                listView1.Items.Add(item);
            }
        }

It's not very efficient, but it should give you an idea.

[sajjadlove]

thanks.i already tested this way.
but is it best? in my project performance is very important and must be very high......