C#实现UI控件输出日志的方法详解

public partial class ui_log : ListBox
    {
        public ui_log()
        {
            InitializeComponent();

            this.DrawMode = DrawMode.OwnerDrawFixed;
            this.BackColor = Color.Black;
            this.Font = new Font("黑体", 12);
        }

        protected override void OnPaint(PaintEventArgs pe)
        {
            base.OnPaint(pe);
        }

        protected override void OnDrawItem(DrawItemEventArgs e)
        {
            base.OnDrawItem(e);

            if (e.Index >= 0 && this.Items.Count>0)
            {
                dynamic item = this.Items[e.Index];
                Brush brush = new SolidBrush(item.Color);
                e.Graphics.DrawString(item.Text, e.Font, brush, e.Bounds, StringFormat.GenericDefault);
            }
        }

        public  void Log(string text, Color color)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new Action(() => { Log(text, color); }));
                return;
            }
            this.Items.Add(new { Color = color, Text = text });
            this.SelectedIndex = this.Items.Count - 1;
        }
        public void LogInfo(string text)
        {
            Log(text, Color.Green);
        }
        public void LogError(string text)
        {
            Log(text, Color.Red);
        }
        public void LogWarinig(string text)
        {
            Log(text, Color.Yellow);
        }

        public void ClearLog()
        {
            this.Items.Clear();
        }
    }

private void button1_Click(object sender, EventArgs e)
        {
            ui_log1.LogInfo("Info");
            Thread.Sleep(300);
            ui_log1.LogError("Error");
            Thread.Sleep(300);
            ui_log1.LogWarinig("Warinig");
            Thread.Sleep(300);
            ui_log1.Log("White", Color.White);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            ui_log1.ClearLog();
        }