【WinForm窗体控件开发】之三续 窗体控件设计时的事件属性

转自:http://www.cnblogs.com/bobbychencj/archive/2010/12/01/1893361.html

这次我们主要将上回自定义控件的Attribute部分如何定义Event事件属性简单说明下：

在自定义的控件中添加自定义的事件属性步骤：

1.需要声明自定义事件参数，一般是继承自EventArgs类；

2.声明事件委托；

3.定义事件名称；

下面我们来看看一个自定义事件的示例：

我们首先定义一个窗体控件【SecondControl自定义控件的Event属性.cs】，代码如下：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WinFormControlLibrary{    public partial class SecondControl自定义控件的Event属性 : TextBox    {        /// <summary>        /// Constructor        /// </summary>        public SecondControl自定义控件的Event属性()        {            InitializeComponent();        }        /// <summary>        /// 声明CustomerLogin自定义事件参数        /// </summary>        public sealed class CustomerLoginEventArgs : EventArgs { }        /// <summary>        /// 声明CustomerLogout自定义事件参数        /// </summary>        public sealed class CustomerLogoutEventArgs : EventArgs { }        /// <summary>        /// 声明CustomerLogin事件委托        /// </summary>        public delegate void CustomerLoginEventHandler(object sender, CustomerLoginEventArgs e);        /// <summary>        /// 声明CustomerLogout事件委托        /// </summary>        public delegate void CustomerLogoutEventHandler(object sender, CustomerLogoutEventArgs e);        /// <summary>        /// 声明事件名称        /// </summary>        [CategoryAttribute("自定义事件")]        public event CustomerLoginEventHandler CustomerLogin        {            add { }            remove { }        }        /// <summary>        /// 声明事件名称        /// </summary>        [CategoryAttribute("自定义事件")]        public event CustomerLogoutEventHandler CustomerLogout        {            add { }            remove { }        }        protected override void OnPaint(PaintEventArgs pe)        {            base.OnPaint(pe);        }    }}

接下来，新建Form并添加这个自定义控件，代码如下：

namespace 自定义窗体控件Demo{    partial class 之三窗体控件设计时Event属性Attribute    {        /// <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 Windows Form 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()        {            this.secondControl自定义控件的Event属性1 = new WinFormControlLibrary.SecondControl自定义控件的Event属性();            this.SuspendLayout();            //             // secondControl自定义控件的Event属性1            //             this.secondControl自定义控件的Event属性1.Location = new System.Drawing.Point(55, 48);            this.secondControl自定义控件的Event属性1.Name = "secondControl自定义控件的Event属性1";            this.secondControl自定义控件的Event属性1.Size = new System.Drawing.Size(100, 20);            this.secondControl自定义控件的Event属性1.TabIndex = 0;            //             // 之三窗体控件设计时Event属性Attribute            //             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;            this.ClientSize = new System.Drawing.Size(284, 262);            this.Controls.Add(this.secondControl自定义控件的Event属性1);            this.Name = "之三窗体控件设计时Event属性Attribute";            this.Text = "之三窗体控件设计时Event属性Attribute";            this.ResumeLayout(false);            this.PerformLayout();        }        #endregion        private WinFormControlLibrary.SecondControl自定义控件的Event属性 secondControl自定义控件的Event属性1;    }}

添加完成后，我们就可以在设计时的属性栏中看见我们自定义的属性了。

关于设计时的Attribute就基本介绍到这里。