picButton.cs文件
using System;using System.Collections.Generic;using System.ComponentModel;using System.Drawing;using System.Data;using System.Text;using System.Windows.Forms;using System.Runtime.InteropServices;using Streamsea.Properties;namespace Streamsea.Forms
{
/// <summary>
/// 图片按钮
/// </summary> public partial class ucPictureButton : UserControl { private bool bPressed; private Image pressImg; private Image backImg; private Image disableImg; private Image m_img; private PictureBoxSizeMode m_sizemode = PictureBoxSizeMode.StretchImage; /// <summary> /// 构造函数 /// </summary> public ucPictureButton() { base.Font = new Font("Tahoma", 9F, System.Drawing.FontStyle.Bold); } private Size _GetPreferredSize() { if (this.m_img == null) { return base.Size; } return this.m_img.Size; } private Rectangle _ImageRectangle { get { Rectangle rectangle1 = new Rectangle(0, 0, 0, 0); if (this.m_img != null) { switch (this.m_sizemode) { case PictureBoxSizeMode.Normal: rectangle1.Size = this.m_img.Size; return rectangle1; case PictureBoxSizeMode.StretchImage: rectangle1.Size = base.ClientSize; return rectangle1; case ((PictureBoxSizeMode)2): return rectangle1; case PictureBoxSizeMode.CenterImage: { rectangle1.Size = this.m_img.Size; Size size1 = base.ClientSize; rectangle1.X = (size1.Width - rectangle1.Width) / 2; rectangle1.Y = (size1.Height - rectangle1.Height) / 2; return rectangle1; } } } return rectangle1; } } /// <summary> /// 指示如何显示图像。 /// </summary> [DefaultValue(PictureBoxSizeMode.StretchImage)] public PictureBoxSizeMode SizeMode { get { return this.m_sizemode; } set { if (!Enum.IsDefined(typeof(PictureBoxSizeMode), value)) { throw new ArgumentException(); } if (this.m_sizemode != value) { this.m_sizemode = value; base.Invalidate(); } } } /// <summary> /// 背景图像 /// </summary> [DefaultValue((string)null)] public Image BackImage { get { return backImg; } set { backImg = value; m_img = backImg; base.Invalidate(); } } /// <summary> /// 按下时的图像 /// </summary> [DefaultValue((string)null)] public Image PressImage { get { return pressImg; } set { pressImg = value; base.Invalidate(); } } /// <summary> /// 不可用时的图像 /// </summary> [DefaultValue((string)null)] public Image DisableImage { get { return disableImg; } set { disableImg = value; m_img = disableImg; base.Invalidate(); } } /// <summary> /// 按钮文字 /// </summary> public string ButtonText { get { return base.Text; } set { base.Text = value; this.Invalidate(); } } /// <summary> /// 获取或设置一个值，该值指示控件是否可以对用户交互作出响应。 /// </summary> public new bool Enabled { get { return base.Enabled; } set { base.Enabled = value; this.Invalidate(); } } /// <summary> /// 引发 System.Windows.Forms.Control.MouseDown 事件。 /// </summary> /// <param name="e"></param> protected override void OnMouseDown(MouseEventArgs e) { this.bPressed = true; this.Invalidate(); base.OnMouseDown(e); } /// <summary> /// 引发 System.Windows.Forms.Control.MouseUp 事件。 /// </summary> /// <param name="e"></param> protected override void OnMouseUp(MouseEventArgs e) { this.bPressed = false; this.Invalidate(); base.OnMouseUp(e); } /// <summary> /// 绘制控件的背景。 /// </summary> /// <param name="e"></param> protected override void OnPaintBackground(PaintEventArgs e) { Region region1 = new Region(base.ClientRectangle); region1.Exclude(this._ImageRectangle); e.Graphics.FillRegion(new SolidBrush(this.Parent!=null?this.Parent.BackColor:Color.White), region1); region1.Dispose(); } /// <summary> /// 引发 System.Windows.Forms.Control.Paint 事件。 /// </summary> /// <param name="e"></param> protected override void OnPaint(PaintEventArgs e) { if (this.bPressed) { if (pressImg == null) { pressImg = Resources.PressImage; } m_img = pressImg; } else if (this.Enabled) { if (backImg == null) { backImg = Resources.BackImage; } m_img = backImg; } else { if (disableImg == null) { disableImg = Resources.DisableImage; } m_img = disableImg; } e.Graphics.DrawImage(this.m_img, this._ImageRectangle, new Rectangle(0, 0, this.m_img.Width, this.m_img.Height), GraphicsUnit.Pixel); if (this.ButtonText.Length > 0) { SizeF size = e.Graphics.MeasureString(this.ButtonText, this.Font); e.Graphics.DrawString(this.ButtonText, this.Font, new SolidBrush(Enabled?this.ForeColor:Color.Gray), (this.ClientSize.Width - size.Width) / 2, (this.ClientSize.Height - size.Height) / 2); } //e.Graphics.DrawRectangle(new Pen(this.Parent != null ? this.Parent.BackColor : Color.White), 0, 0, this.ClientSize.Width - 1, this.ClientSize.Height - 1); base.OnPaint(e); } /// <summary> /// 引发 System.Windows.Forms.Control.Resize 事件。 /// </summary> /// <param name="eventg"></param> protected override void OnResize(EventArgs eventg) { base.OnResize(eventg); if ((this.m_sizemode == PictureBoxSizeMode.StretchImage) || (this.m_sizemode == PictureBoxSizeMode.CenterImage)) { base.Invalidate(); } } }
} picButton.Designer.cs
namespace Streamsea.Forms{ partial class ucPictureButton { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); }
组件设计器生成的代码 }}在项目属性的资源文件里添加3张图片，名字分别为 BackImage DisableImage PressImage，这是默认的图片，在设计和谐程序的时候也可以换用其他图片的。
