C#繼承基本控件實現自定義控件

摘自：http://www.cnblogs.com/greatverve/archive/2012/04/25/user-control-inherit.html

 

自定義控件分三類：
1.復合控件：基本控件組合而成。繼承自UserControl
2.擴展控件：繼承基本控件，擴展一些屬性與事件。比如繼承Button
3.自定義控件：直接繼承自Control
第一種情況上手比較容易，也比較常用，其中也有不少技巧，慢慢總結。
比如要單獨建個類庫項目，才不會引起沖突。
怎樣把事件代碼推遲到使用者。
今天把擴展控件簡單入門。
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步驟一：這里首先要建一個Windows控件庫項目。
步驟二：新建用戶控件，修改代碼(注意注釋掉.Designer.cs文件中的代碼)
擴展Button

           using System; 
          
using System.Collections.Generic; 
          
using System.ComponentModel; 
          
using System.Drawing; 
          
using System.Data; 
          
using System.Linq; 
          
using System.Text; 
          
using System.Windows.Forms; 
          
 
          
namespace WinFormControlLibrary 
          
{ 
          
    public partial class UcButton : Button 
          
    { 
          
        public UcButton() 
          
        { 
          
            InitializeComponent(); 
          
        } 
          
        // Creates the private variable that will store the value of your  
          
        // property. 
          
        private int varValue; 
          
        // Declares the property. 
          
        public int ButtonValue 
          
        { 
          
            // Sets the method for retrieving the value of your property. 
          
            get 
          
            { 
          
                return varValue; 
          
            } 
          
            // Sets the method for setting the value of your property. 
          
            set 
          
            { 
          
                varValue = value; 
          
            } 
          
        } 
          
    } 
          
} 
         

修改.Desinger.cs

           namespace WinFormControlLibrary 
          
{ 
          
    partial class UcButton 
          
    { 
          
        /// <summary>  
          
        /// Required designer variable. 
          
        /// </summary> 
          
        private System.ComponentModel.IContainer components = null; 
          
 
          
        /// <summary>  
          
        /// Clean up any resources being used. 
          
        /// </summary> 
          
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param> 
          
        protected override void Dispose(bool disposing) 
          
        { 
          
            if (disposing && (components != null)) 
          
            { 
          
                components.Dispose(); 
          
            } 
          
            base.Dispose(disposing); 
          
        } 
          
 
          
        #region Component Designer generated code 
          
 
          
        /// <summary>  
          
        /// Required method for Designer support - do not modify  
          
        /// the contents of this method with the code editor. 
          
        /// </summary> 
          
        private void InitializeComponent() 
          
        { 
          
            components = new System.ComponentModel.Container(); 
          
            //把這句注釋掉 
          
            //this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; 
          
        } 
          
 
          
        #endregion 
          
    } 
          
} 
         

擴展Label

           using System; 
          
using System.Collections.Generic; 
          
using System.ComponentModel; 
          
using System.Drawing; 
          
using System.Data; 
          
using System.Linq; 
          
using System.Text; 
          
using System.Windows.Forms; 
          
 
          
namespace WinFormControlLibrary 
          
{ 
          
    public partial class UcLabel : Label 
          
    { 
          
        public UcLabel() 
          
        { 
          
            InitializeComponent(); 
          
        } 
          
        protected override void OnMouseEnter(EventArgs e) 
          
        { 
          
            base.OnMouseEnter(e); 
          
            this.Font = new Font("宋體", 10F, FontStyle.Underline); 
          
        } 
          
        protected override void OnMouseLeave(System.EventArgs e) 
          
        { 
          
            base.OnMouseLeave(e); 
          
            this.Font = new Font("宋體", 10F, FontStyle.Regular); 
          
        } 
          
    } 
          
} 
         

步驟三：在其他Windows窗體項目中添加項目引用。編譯之后就在工具箱看到生成的自定義控件。
url:http://greatverve.cnblogs.com/archive/2012/02/16/user-control-Inherit.html
參考msdn：

http://msdn.microsoft.com/zh-cn/library/5h0k2e6x(v=vs.80).aspx

http://blog.csdn.net/yysyangyangyangshan/article/details/7078471

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