简单的自定义控件二

来源：互联网发布：分层时序记忆网络编辑：程序博客网时间：2024/05/14 15:12

继上一篇《简单的自定义控件》http://blog.csdn.net/joyhen/article/details/8294951

今天我们来改进一下。还是原来的例子，照着修改，Render渲染输出的html

protected string NewUserLoginControl()        {            StringBuilder strb = new StringBuilder("");            strb.Append("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http:/" + "/www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\r\n");            strb.Append("<html xmlns=\"http:/" + "/www.w3.org/1999/xhtml\" >\r\n");            strb.Append("<head runat=\"server\">\r\n");            strb.Append("   <title>管理员登录登录</title>\r\n");            strb.Append("   <link href=\"style/login/base.css\" rel=\"stylesheet\" type=\"text/css\" />\r\n");            strb.Append("   <link href=\"style/login/style.css\" rel=\"stylesheet\" type=\"text/css\" />\r\n");            strb.Append("   <style type=\"text/css\" id=\"overridestyle\">\r\n");            strb.Append("       body{ background-color:#F2F9FD;}/*#ddd*/#box \r\n.block h2{  background-color:#2275b3;}/*#C66653,#646464*/\r\n");            strb.Append("       .text_field{ height:30px; line-height:30px;  padding-left:5px;}\r\n.left{ line-height:30px;}\r\n");            strb.Append("   </style>\r\n");            strb.Append("   <!--[if lte IE 6]>\r\n");            strb.Append("       <script src=\"js/DD_belatedPNG_0.0.8a.js\" type=\"text/javascript\"></script>\r\n");            strb.Append("       <script type=\"text/javascript\">DD_belatedPNG.fix('.button img');</script>\r\n");            strb.Append("       <style type=\"text/css\">.block{border:1px solid #DEEFFA}</style>\r\n");            strb.Append("   <![endif]-->\r\n");            strb.Append("   <!--[if lte IE 8]>\r\n");            strb.Append("       <style type=\"text/css\">.block{border:1px solid #92b2d5}</style>\r\n");            strb.Append("   <![endif]-->\r\n");            strb.Append("</head>\r\n");            strb.Append("<body><%--onkeydown=\"onEnterDown();\"--%>\r\n");            strb.Append("   <div id=\"box\">\r\n<div style=\"height:129px;\"></div>\r\n");            strb.Append("   <div class=\"block\" id=\"block-login\">\r\n<h2>管理员登录</h2>\r\n");            strb.Append("   <div class=\"content login\">\r\n<div class=\"flash\">\r\n");            strb.Append("   <div class=\"message notice\"><p> 请输入正确的用户名和密码</p></div>\r\n");            strb.Append("   </div>\r\n<form id=\"form1\" class=\"form login\" action=\"###\">\r\n");            strb.Append("   <div class=\"group wat-cf\">\r\n");            strb.Append("       <div class=\"left\"><label class=\"label right\">" + Lbl_UserName + "</label></div>\r\n");            strb.Append("       <div class=\"right\"><input type=\"text\" class=\"text_field\"/></div>\r\n");            strb.Append("       </div>\r\n<div class=\"group wat-cf\">\r\n");            strb.Append("       <div class=\"left\"><label class=\"label right\">" + Lbl_UserPwd + "</label></div>\r\n");            strb.Append("       <div class=\"right\"><input type=\"password\" class=\"text_field\"/></div>\r\n");            strb.Append("   </div>\r\n<div class=\"group navform wat-cf\"><div class=\"right\">\r\n");            strb.Append("   <button class=\"button\"><%--onclick=\"submit_login();\"--%><img src=\"images/key.png\" alt=\"保存\" />登录</button>\r\n");            strb.Append("   </div>\r\n</div>\r\n</form>\r\n</div>\r\n</div>\r\n</div>\r\n");            strb.Append("   <%--<script src=\"js/jquery-1.7.2.min.js\" type=\"text/javascript\"></script>\r\n");            strb.Append("   <script src=\"js/js_login.js\" type=\"text/javascript\"></script>\r\n");            strb.Append("   <script type=\"text/javascript\">\r\n       $(function() {$(\"input[type=text]\").focus();})\r\n");            strb.Append("       function onEnterDown() {if (window.event.keyCode == 13) {submit_login();}}\r\n</script>--%>\r\n");            strb.Append("</body>\r\n</html>");            return strb.ToString();        }

上面有2个参数，是文本框的标题，所有我们要写2个属性

private string lbl_userName = "用户名:";        [System.ComponentModel.Browsable(true)]//在属性窗口中是否可见        [System.ComponentModel.Category("Appearance")]//属性的分类，如，行为，外观，大家可以在属性窗口看见这样的分类        [System.ComponentModel.DefaultValue("用户名:")]        [System.ComponentModel.Description("用户名:")]//这些是显示在属性窗口底下的        public virtual string Lbl_UserName        {            get { return lbl_userName; }            set { lbl_userName = value; }        }        private string lbl_userPwd = "密　码:";        [System.ComponentModel.Browsable(true)]        [System.ComponentModel.Category("Appearance")]        [System.ComponentModel.DefaultValue("密　码:")]        [System.ComponentModel.Description("密　码:")]        public virtual string Lbl_UserPwd        {            get { return lbl_userPwd; }            set { lbl_userPwd = value; }        }

然后我们重写的Render部分这样

protected override void Render(System.Web.UI.HtmlTextWriter writer)        {            writer.Write(NewUserLoginControl());            base.Render(writer);        }

好了，重写生成一下CustomerWebControls这个类，然后把web层清理下，重新生成，这时我们把左侧控件箱里的userlogin拖到页面(假如页面是RenderLoginControl.aspx)上

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RenderLoginControl.aspx.cs" Inherits="MyWebSiteTest.admin.RenderLoginControl" %><%@ Register Assembly="CustomerWebControls" Namespace="CustomerWebControls" TagPrefix="cc1" %><cc1:userlogin runat='server'></cc1:userlogin>

再去看看属性窗口

这就出来效果了。上面其实都是大段的html，根本说不上是用户控件。但是这是个思路，下一篇我们把html全部去掉，只留下基本骨架，也就是2个输入框+2个输入框标题 + 一个按钮，然后我们添加更具体的属性和事件。等待出炉吧