1.C#Button扩展控件

1.解决方案下添加新建项目新建类库

2. 在项目下添加新建项选择新建组件类

3.点击项目属性，选择资源，添加资源，把准备好的图片加入Resource

4.先引用，然后导入两个命名空间

5.因为是扩展控件，把继承自Component改成继承自Button

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
namespace FJZControl
{
    public partial class FJZButton : Button
    {
        public FJZButton()
        {
            InitializeComponent();
            this.FlatStyle = FlatStyle.Flat;
        }

        public FJZButton(IContainer container)
        {
            container.Add(this);

            InitializeComponent();
        }
        #region 枚举类型
        public enum ButtonPreSetImage
        {   None,
            Alarm,
            Folder,
            DownLoad,
            Password,
            Power
        }
        #endregion

        #region 控件属性
        private ButtonPreSetImage preSetButtonImage;
        [Category("FJZ自定义Button属性")]
        [Description("按钮样式选择")]
        public ButtonPreSetImage PreSetButtonImage
        {
            get
            {
                return preSetButtonImage;
            }

            set
            {
                preSetButtonImage = value;
                switch (preSetButtonImage)
                {
                    case ButtonPreSetImage.None:
                        Image = null;
                        break;
                    case ButtonPreSetImage.Alarm:
                        Image = Properties.Resources.alarm;
                        break;
                    case ButtonPreSetImage.DownLoad:
                        Image = Properties.Resources.Download;
                        break;
                    case ButtonPreSetImage.Folder:
                        Image = Properties.Resources.folder;
                        break;
                    case ButtonPreSetImage.Password:
                        Image = Properties.Resources.password;
                        break;
                    case ButtonPreSetImage.Power:
                        Image = Properties.Resources.power;
                        break;
                    default:
                        break;
                }
                if (preSetButtonImage == ButtonPreSetImage.None)
                {
                    this.ImageAlign = ContentAlignment.MiddleCenter;
                    this.TextAlign = ContentAlignment.MiddleCenter;

                }
                else
                {
                    this.ImageAlign = ContentAlignment.MiddleLeft;
                    this.TextAlign = ContentAlignment.MiddleRight;
                }

            }
        }
         
        #endregion
    }
}

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