
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; namespace TextDemo { public partial class Form3 : Form { public Form3() { InitializeComponent(); } /// <summary> /// 添加一個繼承自textbox的新類,重寫WndProc方法,在重寫的方法里重繪邊框就可以了 /// </summary> /// <param name="m"></param> protected override void WndProc(ref Message m) { base.WndProc(ref m); borderDrawer borderDrawer1 = new borderDrawer(); borderDrawer1.DrawBorder(ref m, this.Width, this.Height); } } #region 第一種方法,使用時必須把文本框的BorderStyle為FixedSingle才能使用 [ToolboxItem(true)] public class TextBoxXP : System.Windows.Forms.TextBox { /// <summary> /// 獲得當前進程,以便重繪控件 /// </summary> /// <param name="hWnd"></param> /// <returns></returns> [System.Runtime.InteropServices.DllImport("user32.dll")] static extern IntPtr GetWindowDC(IntPtr hWnd); [System.Runtime.InteropServices.DllImport("user32.dll")] static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC); /// <summary> /// 是否啟用熱點效果 /// </summary> private bool _HotTrack = true; /// <summary> /// 邊框顏色 /// </summary> private Color _BorderColor = Color.Black; /// <summary> /// 熱點邊框顏色 /// </summary> private Color _HotColor = Color.FromArgb(0x33, 0x5E, 0xA8); /// <summary> /// 是否鼠標MouseOver狀態 /// </summary> private bool _IsMouseOver = false; #region 屬性 /// <summary> /// 是否啟用熱點效果 /// </summary> [Category("行為"), Description("獲得或設置一個值,指示當鼠標經過控件時控件邊框是否發生變化。只在控件的BorderStyle為FixedSingle時有效"), DefaultValue(true)] public bool HotTrack { get { return this._HotTrack; } set { this._HotTrack = value; //在該值發生變化時重繪控件,下同 //在設計模式下,更改該屬性時,如果不調用該語句, //則不能立即看到設計試圖中該控件相應的變化 this.Invalidate(); } } /// <summary> /// 邊框顏色 /// </summary> [Category("外觀"), Description("獲得或設置控件的邊框顏色"), DefaultValue(typeof(Color), "#A7A6AA")] public Color BorderColor { get { return this._BorderColor; } set { this._BorderColor = value; this.Invalidate(); } } /// <summary> /// 熱點時邊框顏色 /// </summary> [Category("外觀"), Description("獲得或設置當鼠標經過控件時控件的邊框顏色。只在控件的BorderStyle為FixedSingle時有效"), DefaultValue(typeof(Color), "#335EA8")] public Color HotColor { get { return this._HotColor; } set { this._HotColor = value; this.Invalidate(); } } #endregion 屬性 /// <summary> /// /// </summary> public TextBoxXP() : base() { } /// <summary> /// 鼠標移動到該控件上時 /// </summary> /// <param name="e"></param> protected override void OnMouseMove(MouseEventArgs e) { //鼠標狀態 this._IsMouseOver = true; //如果啟用HotTrack,則開始重繪 //如果不加判斷這里不加判斷,則當不啟用HotTrack, //鼠標在控件上移動時,控件邊框會不斷重繪, //導致控件邊框閃爍。下同 //誰有更好的辦法?Please tell me , Thanks。 if (this._HotTrack) { //重繪 this.Invalidate(); } base.OnMouseMove(e); } /// <summary> /// 當鼠標從該控件移開時 /// </summary> /// <param name="e"></param> protected override void OnMouseLeave(EventArgs e) { this._IsMouseOver = false; if (this._HotTrack) { //重繪 this.Invalidate(); } base.OnMouseLeave(e); } /// <summary> /// 當該控件獲得焦點時 /// </summary> /// <param name="e"></param> protected override void OnGotFocus(EventArgs e) { if (this._HotTrack) { //重繪 this.Invalidate(); } base.OnGotFocus(e); } /// <summary> /// 當該控件失去焦點時 /// </summary> /// <param name="e"></param> protected override void OnLostFocus(EventArgs e) { if (this._HotTrack) { //重繪 this.Invalidate(); } base.OnLostFocus(e); } /// <summary> /// 獲得操作系統消息 /// </summary> /// <param name="m"></param> protected override void WndProc(ref Message m) { base.WndProc(ref m); if (m.Msg == 0xf || m.Msg == 0x133) { //攔截系統消息,獲得當前控件進程以便重繪。 //一些控件(如TextBox、Button等)是由系統進程繪制,重載OnPaint方法將不起作用. //所有這里並沒有使用重載OnPaint方法繪制TextBox邊框。 // //MSDN:重寫 OnPaint 將禁止修改所有控件的外觀。 //那些由 Windows 完成其所有繪圖的控件(例如 Textbox)從不調用它們的 OnPaint 方法, //因此將永遠不會使用自定義代碼。請參見您要修改的特定控件的文檔, //查看 OnPaint 方法是否可用。如果某個控件未將 OnPaint 作為成員方法列出, //則您無法通過重寫此方法改變其外觀。 // //MSDN:要了解可用的 Message.Msg、Message.LParam 和 Message.WParam 值, //請參考位於 MSDN Library 中的 Platform SDK 文檔參考。可在 Platform SDK(“Core SDK”一節) //下載中包含的 windows.h 頭文件中找到實際常數值,該文件也可在 MSDN 上找到。 IntPtr hDC = GetWindowDC(m.HWnd); if (hDC.ToInt32() == 0) { return; } //只有在邊框樣式為FixedSingle時自定義邊框樣式才有效 if (this.BorderStyle == BorderStyle.FixedSingle) { //邊框Width為1個像素 System.Drawing.Pen pen = new Pen(this._BorderColor, 1); ; if (this._HotTrack) { if (this.Focused) { pen.Color = this._HotColor; } else { if (this._IsMouseOver) { pen.Color = this._HotColor; } else { pen.Color = this._BorderColor; } } } //繪制邊框 System.Drawing.Graphics g = Graphics.FromHdc(hDC); g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; g.DrawRectangle(pen, 0, 0, this.Width - 1, this.Height - 1); pen.Dispose(); } //返回結果 m.Result = IntPtr.Zero; //釋放 ReleaseDC(m.HWnd, hDC); } } } #endregion /// <summary> /// 第二種方法 /// </summary> class borderDrawer : System.Windows.Forms.TextBox { private Color borderColor = Color.Red; // 設置默認的邊框顏色 private static int WM_NCPAINT = 0x0085; // WM_NCPAINT message private static int WM_ERASEBKGND = 0x0014; // WM_ERASEBKGND message private static int WM_PAINT = 0x000F; // WM_PAINT message [DllImport("user32.dll")] static extern IntPtr GetDCEx(IntPtr hwnd, IntPtr hrgnclip, uint fdwOptions); //釋放DC [DllImport("user32.dll")] static extern int ReleaseDC(IntPtr hwnd, IntPtr hDC); /// <summary> /// 重繪邊框的方法 /// </summary> /// <param name="message"></param> /// <param name="width"></param> /// <param name="height"></param> public void DrawBorder(ref Message message, int width, int height) { if (message.Msg == WM_NCPAINT || message.Msg == WM_ERASEBKGND || message.Msg == WM_PAINT) { IntPtr hdc = GetDCEx(message.HWnd, (IntPtr)1, 1 | 0x0020); if (hdc != IntPtr.Zero) { Graphics graphics = Graphics.FromHdc(hdc); Rectangle rectangle = new Rectangle(0, 0, width, height); ControlPaint.DrawBorder(graphics, rectangle, borderColor, ButtonBorderStyle.Solid); message.Result = (IntPtr)1; ReleaseDC(message.HWnd, hdc); } } } } }
