asp.net控件开发基础(1)

简单的没事件的控件

Code
using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI;
using System.ComponentModel;

namespace ComponentControl
{
    [DefaultProperty("UserName")] //默认选择属性
    public class Ctrl3 : Control
    {
        private string m_UserName;
        [Description("登录用户名")]  //属性描述
        public string UserName
        {
            get { return ViewState["UserName"] == null ? "admin" : ViewState["UserName"].ToString(); }
            set { m_UserName = value; }
        }
        private string m_Password;
        [Description("登录密码")]
        public string Password
        {
            get { return ViewState["PassWord"] == null ? "admin" : ViewState["PassWord"].ToString(); }
            set { m_Password = value; }
        }

        protected override void Render(HtmlTextWriter writer)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Border, "1px solid #ccc");
            writer.RenderBeginTag(HtmlTextWriterTag.Table);
            writer.RenderBeginTag(HtmlTextWriterTag.Tr);
            
            writer.RenderBeginTag(HtmlTextWriterTag.Td);
            writer.Write("UserName : ");
            writer.RenderEndTag();

            writer.RenderBeginTag(HtmlTextWriterTag.Td);
            writer.AddAttribute(HtmlTextWriterAttribute.Type, "text");
            writer.AddAttribute(HtmlTextWriterAttribute.Value, UserName);
            writer.AddAttribute(HtmlTextWriterAttribute.Width, "200px");
            writer.RenderBeginTag(HtmlTextWriterTag.Input);
            writer.RenderEndTag();
            writer.RenderEndTag();
            writer.RenderEndTag();

            writer.RenderBeginTag(HtmlTextWriterTag.Tr);
            writer.RenderBeginTag(HtmlTextWriterTag.Td);
            writer.Write("PassWord : ");
            writer.RenderEndTag();

            writer.RenderBeginTag(HtmlTextWriterTag.Td);
            writer.AddAttribute(HtmlTextWriterAttribute.Type, "password");
            writer.AddAttribute(HtmlTextWriterAttribute.Width, "200px");
            writer.AddAttribute(HtmlTextWriterAttribute.Value, Password);
            writer.RenderBeginTag(HtmlTextWriterTag.Input);
            writer.RenderEndTag();
            writer.RenderEndTag();
            writer.RenderEndTag();

            writer.RenderBeginTag(HtmlTextWriterTag.Tr);
            writer.AddAttribute(HtmlTextWriterAttribute.Colspan, "2");
            writer.AddAttribute(HtmlTextWriterAttribute.Align, "center");
            writer.RenderBeginTag(HtmlTextWriterTag.Td);
            writer.AddAttribute(HtmlTextWriterAttribute.Type, "button");
            writer.AddAttribute(HtmlTextWriterAttribute.Value, "Test");
            writer.RenderBeginTag(HtmlTextWriterTag.Input);
            writer.RenderEndTag();
            writer.RenderEndTag();

            writer.RenderEndTag();
            writer.RenderEndTag();

            //base.Render(writer);
        }
    }
}