listbox_fail.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace gui_20150930_winform
{
    public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }

        // Calculate the size of an item.
        private int ItemMargin = 5;
        private void lstJobs_MeasureItem(object sender,
            MeasureItemEventArgs e)
        {
            // Get the ListBox and the item.
            ListBox lst = sender as ListBox;
            string txt = (string)lst.Items[e.Index];

            // Measure the string.
            SizeF txt_size = e.Graphics.MeasureString(txt, this.Font);

            // Set the required size.
            e.ItemHeight = (int)txt_size.Height + 2 * ItemMargin;
            e.ItemWidth = (int)txt_size.Width;
        }

        // Draw the item.
        private void lstJobs_DrawItem(object sender,
            DrawItemEventArgs e)
        {
            // Get the ListBox and the item.
            ListBox lst = sender as ListBox;
            string txt = (string)lst.Items[e.Index];

            // Draw the background.
            e.DrawBackground();

            // See if the item is selected.
            if ((e.State & DrawItemState.Selected) ==
                DrawItemState.Selected)
            {
                // Selected. Draw with the system highlight color.
                e.Graphics.DrawString(txt, this.Font,
                    SystemBrushes.HighlightText, e.Bounds.Left,
                        e.Bounds.Top + ItemMargin);
            }
            else
            {
                // Not selected. Draw with ListBox's foreground color.
                using (SolidBrush br = new SolidBrush(Color.Black))
                {
                    e.Graphics.DrawString(txt, this.Font, br,
                        e.Bounds.Left, e.Bounds.Top + ItemMargin);
                }
            }

            // Draw the focus rectangle if appropriate.
            e.DrawFocusRectangle();
        }


        private void btnAddJob_Click(object sender, EventArgs e)
        {
            lstJobs.DrawMode = DrawMode.OwnerDrawVariable;

            // Create some items.
            lstJobs.Items.Add("Name: Mercury\nMass: 0.055 Earths\nYear: 87.9691 Earth days\nTemp: 183 °C to 427 °C");
            lstJobs.Items.Add("Name: Venus\nMass: 0.815 Earths\nYear: 243 Earth days");
            lstJobs.Items.Add("Name: Earth\nMass: 1.0 Earths\nYear: 365.256 Earth days");
            lstJobs.Items.Add("Name: Mars\nMass: 0.107 Earths\nYear: 6");
        }

        private void lstJobs_SelectedIndexChanged(object sender, EventArgs e)
        {

        }
    }
}