本文实例讲述了C#通过重写Panel改变边框颜色与宽度的方法。分享给大家供大家参考。具体实现方法如下：

using System;using System.Collections.Generic;using System.Text;using System.Runtime.InteropServices;using System.ComponentModel;using System.Windows.Forms;using System.Drawing;namespace ImageStudio{ public class PanelEx : System.Windows.Forms.Panel { [DllImport("user32.dll")] private static extern IntPtr GetWindowDC(IntPtr hwnd); [DllImport("user32.dll")] private static extern int ReleaseDC(IntPtr hwnd, IntPtr hdc); private Color _borderColor = Color.Black; private int _borderWidth = 1; // // 摘要: // 获取或设置控件的边框颜色。 // // 返回结果: // 控件的边框颜色 System.Drawing.Color。默认为 System.Drawing.Color.Black // 属性的值。 [Description("组件的边框颜色。"), Category("Appearance")] public Color BorderColor { get { return _borderColor; } set { _borderColor = value; this.Invalidate(); } } // // 摘要: // 获取或设置控件的边框宽度。 // // 返回结果: // 控件的边框宽度 int。默认为 1 // 属性的值。 [Description("组件的边框宽度。"), Category("Appearance")] public int BorderWidth { get { return _borderWidth; } set { _borderWidth = value; this.Invalidate(); } } public PanelEx() { SetStyle(ControlStyles.DoubleBuffer, true); SetStyle(ControlStyles.AllPaintingInWmPaint, false); SetStyle(ControlStyles.ResizeRedraw, true); SetStyle(ControlStyles.UserPaint, true); SetStyle(ControlStyles.SupportsTransparentBackColor, true); this.Paint+=new PaintEventHandler(PanelEx_Paint); } private void PanelEx_Paint(object sender, PaintEventArgs e) { if (this.BorderStyle == BorderStyle.FixedSingle) { IntPtr hDC = GetWindowDC(this.Handle); Graphics g = Graphics.FromHdc(hDC); ControlPaint.DrawBorder( g, new Rectangle(0, 0, this.Width, this.Height), _borderColor, _borderWidth, ButtonBorderStyle.Solid, _borderColor, _borderWidth, ButtonBorderStyle.Solid, _borderColor, _borderWidth, ButtonBorderStyle.Solid, _borderColor, _borderWidth, ButtonBorderStyle.Solid); g.Dispose(); ReleaseDC(Handle, hDC); } } }}

希望本文所述对大家的C#程序设计有所帮助。