1、新建项目，选择Windows窗体应用程序。
2、右键该项目，再新建类，类名为ScrollingText 。
3、把以下代码粘贴上去： [ ToolboxBitmapAttribute(typeof(ScrollingText), "ScrollingText.bmp"), DefaultEvent("TextClicked") ] public class ScrollingText : System.Windows.Forms.Control { private Timer timer; private string text = "Text"; private float staticTextPos = 0; private float yPos = 0; private ScrollDirection scrollDirection = ScrollDirection.RightToLeft; private ScrollDirection currentDirection = ScrollDirection.LeftToRight; private VerticleTextPosition verticleTextPosition = VerticleTextPosition.Center; private int scrollPixelDistance = 2; private bool showBorder = true; private bool stopScrollOnMouseOver = false; private bool scrollOn = true; private Brush foregroundBrush = null; private Brush backgroundBrush = null; private Color borderColor = Color.Black; private RectangleF lastKnownRect; public ScrollingText() { InitializeComponent(); Version v = System.Environment.Version; if (v.Major < 2) { this.SetStyle(ControlStyles.DoubleBuffer, true); } else { this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true); } this.SetStyle(ControlStyles.AllPaintingInWmPaint, true); this.SetStyle(ControlStyles.UserPaint, true); this.SetStyle(ControlStyles.ResizeRedraw, true); timer = new Timer(); timer.Interval = 25; timer.Enabled = true; timer.Tick += new EventHandler(Tick); } protected override void Dispose( bool disposing ) { if( disposing ) { if (foregroundBrush != null) foregroundBrush.Dispose(); if (backgroundBrush != null) backgroundBrush.Dispose(); if (timer != null) timer.Dispose(); } base.Dispose( disposing ); } #region Component Designer generated code private void InitializeComponent() { this.Name = "ScrollingText"; this.Size = new System.Drawing.Size(216, 40); this.Click += new System.EventHandler(this.ScrollingText_Click); } #endregion private void Tick(object sender, EventArgs e) { lastKnownRect.Inflate(10, 5); RectangleF refreshRect = lastKnownRect; refreshRect.X = Math.Max(0, lastKnownRect.X); refreshRect.Width = Math.Min(lastKnownRect.Width + lastKnownRect.X, this.Width); refreshRect.Width = Math.Min(this.Width - lastKnownRect.X, refreshRect.Width); Region updateRegion = new Region(refreshRect); Invalidate(updateRegion); Update(); } protected override void OnPaint(PaintEventArgs pe) { DrawScrollingText(pe.Graphics); base.OnPaint(pe); } public void DrawScrollingText(Graphics canvas) { canvas.SmoothingMode = SmoothingMode.HighQuality; canvas.PixelOffsetMode = PixelOffsetMode.HighQuality; SizeF stringSize = canvas.MeasureString(this.text, this.Font); if (scrollOn) { CalcTextPosition(stringSize); } if (backgroundBrush != null) { canvas.FillRectangle(backgroundBrush, 0, 0, this.ClientSize.Width, this.ClientSize.Height); } else { canvas.Clear(this.BackColor); } if (showBorder) { using (Pen borderPen = new Pen(borderColor)) canvas.DrawRectangle(borderPen, 0, 0, this.ClientSize.Width - 1, this.ClientSize.Height - 1); } if (foregroundBrush == null) { using (Brush tempForeBrush = new System.Drawing.SolidBrush(this.ForeColor)) canvas.DrawString(this.text, this.Font, tempForeBrush, staticTextPos, yPos); } else { canvas.DrawString(this.text, this.Font, foregroundBrush, staticTextPos, yPos); } lastKnownRect = new RectangleF(staticTextPos, yPos, stringSize.Width, stringSize.Height); EnableTextLink(lastKnownRect); } private void CalcTextPosition(SizeF stringSize) { switch (scrollDirection) { case ScrollDirection.RightToLeft: if (staticTextPos < (-1 * (stringSize.Width))) staticTextPos = this.ClientSize.Width - 1; else staticTextPos -= scrollPixelDistance; break; case ScrollDirection.LeftToRight: if (staticTextPos > this.ClientSize.Width) staticTextPos = -1 * stringSize.Width; else staticTextPos += scrollPixelDistance; break; case ScrollDirection.Bouncing: if (currentDirection == ScrollDirection.RightToLeft) { if (staticTextPos < 0) currentDirection = ScrollDirection.LeftToRight; else staticTextPos -= scrollPixelDistance; } else if (currentDirection == ScrollDirection.LeftToRight) { if (staticTextPos > this.ClientSize.Width - stringSize.Width) currentDirection = ScrollDirection.RightToLeft; else staticTextPos += scrollPixelDistance; } break; } switch (verticleTextPosition) { case VerticleTextPosition.Top: yPos = 2; break; case VerticleTextPosition.Center: yPos = (this.ClientSize.Height / 2) - (stringSize.Height / 2); break; case VerticleTextPosition.Botom: yPos = this.ClientSize.Height - stringSize.Height; break; } } #region Mouse over, text link logic private void EnableTextLink(RectangleF textRect) { Point curPt = this.PointToClient(Cursor.Position); if (textRect.Contains(curPt)) { if (stopScrollOnMouseOver) scrollOn = false; this.Cursor = Cursors.Hand; } else { scrollOn = true; this.Cursor = Cursors.Default; } } private void ScrollingText_Click(object sender, System.EventArgs e) { if (this.Cursor == Cursors.Hand) OnTextClicked(this, new EventArgs()); } public delegate void TextClickEventHandler(object sender, EventArgs args); public event TextClickEventHandler TextClicked; private void OnTextClicked(object sender, EventArgs args) { if (TextClicked != null) TextClicked(sender, args); } #endregion #region Properties [ Browsable(true), CategoryAttribute("Scrolling Text"), Description("The timer interval that determines how often the control is repainted") ] public int TextScrollSpeed { set { timer.Interval = value; } get { return timer.Interval; } } [ Browsable(true), CategoryAttribute("Scrolling Text"), Description("How many pixels will the text be moved per Paint") ] public int TextScrollDistance { set { scrollPixelDistance = value; } get { return scrollPixelDistance; } } [ Browsable(true), CategoryAttribute("Scrolling Text"), Description("The text that will scroll accros the control") ] public string ScrollText { set { text = value; this.Invalidate(); this.Update(); } get { return text; } } [ Browsable(true), CategoryAttribute("Scrolling Text"), Description("What direction the text will scroll: Left to Right, Right to Left, or Bouncing") ] public ScrollDirection ScrollDirection { set { scrollDirection = value; } get { return scrollDirection; } } [ Browsable(true), CategoryAttribute("Scrolling Text"), Description("The verticle alignment of the text") ] public VerticleTextPosition VerticleTextPosition { set { verticleTextPosition = value; } get { return verticleTextPosition; } } [ Browsable(true), CategoryAttribute("Scrolling Text"), Description("Turns the border on or off") ] public bool ShowBorder { set { showBorder = value; } get { return showBorder; } } [ Browsable(true), CategoryAttribute("Scrolling Text"), Description("The color of the border") ] public Color BorderColor { set { borderColor = value; } get { return borderColor; } } [ Browsable(true), CategoryAttribute("Scrolling Text"), Description("Determines if the text will stop scrolling if the user's mouse moves over the text") ] public bool StopScrollOnMouseOver { set { stopScrollOnMouseOver = value; } get { return stopScrollOnMouseOver; } } [ Browsable(true), CategoryAttribute("Behavior"), Description("Indicates whether the control is enabled") ] new public bool Enabled { set { timer.Enabled = value; base.Enabled = value; } get { return base.Enabled; } } [ Browsable(false) ] public Brush ForegroundBrush { set { foregroundBrush = value; } get { return foregroundBrush; } } [ ReadOnly(true) ] public Brush BackgroundBrush { set { backgroundBrush = value; } get { return backgroundBrush; } } #endregion } public enum ScrollDirection { RightToLeft, LeftToRight, Bouncing } public enum VerticleTextPosition { Top, Center, Botom }注意引用也添加：using System.Collections;using System.ComponentModel;using System.Drawing;using System.Drawing.Drawing2D;using System.Data;using System.Windows.Forms;
4、到Form1窗口，发现左边的工具栏多了ScrollingText控件，该控件就是刚才创建的控件。
5、拖动新创建的控件，可以当作lable使用，不同的区别是里面的文档可以滚动。
6、特别说明，几个属性的值可以实现滚动屏的需求。ScrollText：显示的内容。TextScrollSpeed：设置滚动的速度，数越小滚动越快。
