一:引言
正在学习自定义控件的开发内容,做为菜鸟勤做笔记自然是必要任务了。本篇为本人学习自定义控件的学习笔记,借此和大家分享一下学习过程吧。
本人学习喜欢先看到具体的实例,然后再深入学习,故先从一个简单自定义控件开始,往后再谈其他内容。
二:简单自定义控件之Hello World
记得学习c语言时就是从“Hello World”开始的,学习C#时依旧是“Hello World”,如今仍已“Hello World”作为我们第一个学习的自定义控件。
闲话少说,我们立刻开始创建我们的第一自定义控件。
步骤:
1.打开vs,新建项目,选择“类库”,命名为“MyControl”,在新建的类库下 “添加” “ 新建项” "类" 命名为“HelloWorld”,创建后整个项目如图:
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" alt="" />
2.为项目添加引用“System.Web”(右键点击项目名称->添加引用->在.net选项卡中选择 system.web
3.打开"HelloWorld"写入代码,如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.UI.WebControls; namespace MyControl
{
public class HelloWorld:WebControl
{
protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
writer.Write("Hello World");
}
}
}
4.编译我们写好的代码,到此我们第一个控件就完成了
三:控件使用
添加控件有两种方法
(1)
1.在我们刚刚的解决方案下新建一个网站
2.添加引用MyControl.dll
3.在页面中添加代码:
<%@ Register Assembly="MyControl" Namespace="MyControl" TagPrefix="cc" %>
4.在页面中加入控件 运行测试
(2)
在工具箱中点击鼠标右键,选择“选择项”,选择刚刚编译好的“MyControl.dll”,此时工具箱中会出现我们的自定义控件,使用时直接拖到页面即可。
OK,我们第一个自定义控件就完成了。