C#自定义控件开发

自定义控件可以用组件或者用户控件来开发，如果是基于基础控件，进行一些扩展，那么可以使用组件，其它的情况可以使用用户控件。

首先新建一个类库项目，然后添加一个组件，取名为ButtonExtend,再添加一个窗体进行测试：

 

 因为是要在Button的基础上进行开发，所以将继承Component改为继承Button,同时将图片添加到资源中，方便使用。

using System;using System.Collections.Generic;using System.ComponentModel;using System.Diagnostics;using System.Linq;using System.Text;using System.Windows.Forms;namespace JSControl
{    public partial class ButtonExtend : Button
    {        public ButtonExtend()
        {
            InitializeComponent();            this.Size = new System.Drawing.Size(50,100);//初始化控件大小        }        public ButtonExtend(IContainer container)
        {
            container.Add(this);

            InitializeComponent();
        }        #region Filed        private ButtonPresetImage buttonType;

        [Browsable(true)]
        [Category("ButtonType")]
        [Description("设置图片")]        public ButtonPresetImage ButtonType
        {            get { return buttonType; }            set
            {                switch (buttonType)
                {
                    buttonType = value;                    case ButtonPresetImage.None:                        this.Image = null;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;                        break;                    case ButtonPresetImage.Check:                        this.Image = Properties.Resources.check;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Close:                        this.Image = Properties.Resources.close;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Cancel:                        this.Image = Properties.Resources.cancel;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Back:                        this.Image = Properties.Resources.back;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Down:                        this.Image = Properties.Resources.down;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Go:                        this.Image = Properties.Resources.go;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Up:                        this.Image = Properties.Resources.up;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Folder:                        this.Image = Properties.Resources.folder;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Refresh:                        this.Image = Properties.Resources.refresh;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Setting:                        this.Image = Properties.Resources.setting;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.FolderOpen:                        this.Image = Properties.Resources.folder_open;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.DocumentDelete:                        this.Image = Properties.Resources.document_delete;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Document:                        this.Image = Properties.Resources.document;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.DocumentEdit:                        this.Image = Properties.Resources.document_edit;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Info:                        this.Image = Properties.Resources.info;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.DocumentAdd:                        this.Image = Properties.Resources.document_add;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Global:                        this.Image = Properties.Resources.web;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Calculator:                        this.Image = Properties.Resources.calculator;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Calendar:                        this.Image = Properties.Resources.calendar;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    case ButtonPresetImage.Printer:                        this.Image = Properties.Resources.printer;                        this.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;                        this.TextAlign = System.Drawing.ContentAlignment.MiddleRight;                        break;                    default:                        break;
                }
            }

        }        #endregion

        /// 
        /// 枚举图标类型        /// 
        public enum ButtonPresetImage
        {
            None,
            Check,
            Close,
            Cancel,
            Back,
            Down,
            Go,
            Up,
            Folder,
            Refresh,
            Setting,
            FolderOpen,
            DocumentDelete,
            Document,
            DocumentEdit,
            Info,
            DocumentAdd,
            Global,
            Calculator,
            Calendar,
            Printer
        }
    }

}

生成之后就会在工具箱找到该控件

 

 

同时在属性栏里可以选择图片