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ASP.NET4.5从零开始(1)

时间:2015-11-23 21:42:47      阅读:255      评论:0      收藏:0      [点我收藏+]

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引言

前段时间客户A突然提出,B项目希望可以做成BS形式的,之前是CS的,因为我之前也没学过ASP.NET,于是一边百度,一边Coding,马马虎虎的把功能流程给调通,然后就交差了,想着闲下来再系统地学习一下ASP.NET。最近,有新接手一个项目,优势设计ASP.NET的,一边写一边百度,写着写着发现首先对于什么时候用服务器控件,什么时候用可编程html元素等细化的东西始终没有清晰的认识,总是挑实现简单的写,结果心里很没有底,终于狠下心来从头认真的学习一下ASP.NET.

开始前的准备

创建Web Form项目

使用ASP.NET EMPTY WEB APPLICATION模板新建一个Visual Studio项目:

技术分享

在项目上右键-Add-New Item选择Web模板中的Web Form项目,这里会创建3个文件,第一个是Web窗体本身,他的扩展名为Aspx,文件内容如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebForm.Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    </div>
    </form>
</body>
</html>

 

  

第二个文件为代码隐藏类,扩展名cs,他默认以与其关联的Web窗体来命名,文件内容如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebForm
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
    }
}

 

最后一个文件为设计器文件,扩展名designer.cs---可视化设计工具需要使用该文件(因为在实际操作中,我们不需要对该文件进行任何修改,因此这里不对其中内容进行贴图)。

代码片段,可编程HTML元素和控件

代码片段指放置在<%与%>标签之间的C#表达式,有各种不同的代码片段可供使用:

技术分享

以上为Pro ASP.NET 4.5 IN C# 第十二章的截图。

对于标准代码片段<%,内容代码片段<%=,数据绑定代码片段<%#,以及指令由于较为常用,下面只对属性代码片段进行举例说明:

 在Web.Config文件中添加配置元素

<?xml version="1.0" encoding="utf-8"?>

<!--
  有关如何配置 ASP.NET 应用程序的详细信息,请访问
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->

<configuration>
    <system.web>
      <compilation debug="true" targetFramework="4.5.1" />
      <httpRuntime targetFramework="4.5.1" />
    </system.web>
    <appSettings>
      <add key="title" value="touha‘s first web form"/>
    </appSettings>
</configuration>

 

修改web窗体文件,读取前面定义的title属性的值:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebForm.Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title> <asp:Literal ID="Literal1" runat="server" Text="<%$ AppSettings:title%>" /></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    </div>
    </form>
</body>
</html>

注意:属性代码片段必须放在Literal控件中,否则将提示如下错误

技术分享

 

关于其详细用法,请参考:https://msdn.microsoft.com/zh-cn/library/d5bd1tad(VS.80).aspx

对于可编程HTML元素,这里暂时不做讲解。

控件是属于ASP.NET很大的一块,她是用于生成HTML片段的可重用的功能块,可分为:用户控件,服务器控件以及内置控件,本节不做叙述,后面会对其将会深入讨论之。

aspx web窗体最后究竟会生成怎样一个C#类

查看Windows7 和 Window8 上的c:\Users\<userName>\AppData\Local\Temp\Temporary ASP.NET Files目录(注意AppData默认为隐藏),下面贴出代码:

 

//------------------------------------------------------------------------------
// <auto-generated>
//     此代码由工具生成。
//     运行时版本:4.0.30319.34209
//
//     对此文件的更改可能会导致不正确的行为,并且如果
//     重新生成代码,这些更改将会丢失。
// </auto-generated>
//------------------------------------------------------------------------------

[assembly: System.CodeDom.Compiler.GeneratedCodeAttribute("ASP.NET", "4.0.30319.34274")]
[assembly: System.Security.SecurityRulesAttribute(System.Security.SecurityRuleSet.Level2)]
[assembly: System.Runtime.Versioning.TargetFrameworkAttribute(".NETFramework,Version=v4.5.1")]

namespace @__ASP {
    
    
    internal class FastObjectFactory_app_web_yc3poujj {
        
        
        #line 1 "c:\\dummy.txt"

        #line default
        #line hidden
        
        
        private FastObjectFactory_app_web_yc3poujj() {
        }
        
        static object Create_ASP_default_aspx() {
            return new ASP.default_aspx();
        }
    }
}

 

 

 

#pragma checksum "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "FF4B8FBE55EE3CCAF50519550FD9CA46EAB26B31"
//------------------------------------------------------------------------------
// <auto-generated>
//     此代码由工具生成。
//     运行时版本:4.0.30319.34209
//
//     对此文件的更改可能会导致不正确的行为,并且如果
//     重新生成代码,这些更改将会丢失。
// </auto-generated>
//------------------------------------------------------------------------------

namespace ASP {
    
    #line 392 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Linq;
    
    #line default
    #line hidden
    
    #line 399 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Web.Security;
    
    #line default
    #line hidden
    
    #line 390 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.ComponentModel.DataAnnotations;
    
    #line default
    #line hidden
    
    #line 388 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Collections.Generic;
    
    #line default
    #line hidden
    
    #line 394 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Text.RegularExpressions;
    
    #line default
    #line hidden
    
    #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
    using System.Web.UI.WebControls;
    
    #line default
    #line hidden
    
    #line 405 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Xml.Linq;
    
    #line default
    #line hidden
    
    #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
    using System.Web.UI;
    
    #line default
    #line hidden
    
    #line 404 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Web.UI.HtmlControls;
    
    #line default
    #line hidden
    
    #line 395 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Web;
    
    #line default
    #line hidden
    
    #line 391 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Configuration;
    
    #line default
    #line hidden
    
    #line 386 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System;
    
    #line default
    #line hidden
    
    #line 393 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Text;
    
    #line default
    #line hidden
    
    #line 400 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Web.Profile;
    
    #line default
    #line hidden
    
    #line 396 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Web.Caching;
    
    #line default
    #line hidden
    
    #line 387 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Collections;
    
    #line default
    #line hidden
    
    #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
    using System.Web.UI.WebControls.WebParts;
    
    #line default
    #line hidden
    
    #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
    using System.Web.UI.WebControls.Expressions;
    
    #line default
    #line hidden
    
    #line 389 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Collections.Specialized;
    
    #line default
    #line hidden
    
    #line 398 "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config"
    using System.Web.SessionState;
    
    #line default
    #line hidden
    
    #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
    using System.Web.DynamicData;
    
    #line default
    #line hidden
    using Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms;
    
    
    [System.Runtime.CompilerServices.CompilerGlobalScopeAttribute()]
    public class default_aspx : global::WebForm.Default, System.Web.SessionState.IRequiresSessionState, System.Web.IHttpHandler {
        
        
        #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
        protected global::System.Web.UI.WebControls.Literal Literal1;
        
        #line default
        #line hidden
        
        private static bool @__initialized;
        
        private static object @__fileDependencies;
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        public default_aspx() {
            string[] dependencies;
            ((global::WebForm.Default)(this)).AppRelativeVirtualPath = "~/Default.aspx";
            if ((global::ASP.default_aspx.@__initialized == false)) {
                dependencies = new string[1];
                dependencies[0] = "~/Default.aspx";
                global::ASP.default_aspx.@__fileDependencies = this.GetWrappedFileDependencies(dependencies);
                global::ASP.default_aspx.@__initialized = true;
            }
            this.Server.ScriptTimeout = 30000000;
        }
        
        protected System.Web.Profile.DefaultProfile Profile {
            get {
                return ((System.Web.Profile.DefaultProfile)(this.Context.Profile));
            }
        }
        
        protected System.Web.HttpApplication ApplicationInstance {
            get {
                return ((System.Web.HttpApplication)(this.Context.ApplicationInstance));
            }
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.LiteralControl @__BuildControl__control2() {
            global::System.Web.UI.LiteralControl @__ctrl;
            @__ctrl = new global::System.Web.UI.LiteralControl("\r\n\r\n<!DOCTYPE html>\r\n\r\n<html xmlns=\"http://www.w3.org/1999/xhtml\">\r\n");
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(104, 68, true));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.HtmlControls.HtmlMeta @__BuildControl__control4() {
            global::System.Web.UI.HtmlControls.HtmlMeta @__ctrl;
            
            #line 7 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl = new global::System.Web.UI.HtmlControls.HtmlMeta();
            
            #line default
            #line hidden
            
            #line 7 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            ((System.Web.UI.IAttributeAccessor)(@__ctrl)).SetAttribute("http-equiv", "Content-Type");
            
            #line default
            #line hidden
            
            #line 7 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl.Content = "text/html; charset=utf-8";
            
            #line default
            #line hidden
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(195, 68, false));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.LiteralControl @__BuildControl__control6() {
            global::System.Web.UI.LiteralControl @__ctrl;
            @__ctrl = new global::System.Web.UI.LiteralControl(" ");
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(276, 1, true));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.WebControls.Literal @__BuildControlLiteral1() {
            global::System.Web.UI.WebControls.Literal @__ctrl;
            
            #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl = new global::System.Web.UI.WebControls.Literal();
            
            #line default
            #line hidden
            this.Literal1 = @__ctrl;
            
            #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl.ID = "Literal1";
            
            #line default
            #line hidden
            @__ctrl.Text = global::System.Convert.ToString(System.Web.Compilation.AppSettingsExpressionBuilder.GetAppSetting("title", typeof(System.Web.UI.WebControls.Literal), "Text"), global::System.Globalization.CultureInfo.CurrentCulture);
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(277, 75, false));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.HtmlControls.HtmlTitle @__BuildControl__control5() {
            global::System.Web.UI.HtmlControls.HtmlTitle @__ctrl;
            
            #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl = new global::System.Web.UI.HtmlControls.HtmlTitle();
            
            #line default
            #line hidden
            global::System.Web.UI.LiteralControl @__ctrl1;
            
            #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl1 = this.@__BuildControl__control6();
            
            #line default
            #line hidden
            System.Web.UI.IParserAccessor @__parser = ((System.Web.UI.IParserAccessor)(@__ctrl));
            
            #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl1);
            
            #line default
            #line hidden
            global::System.Web.UI.WebControls.Literal @__ctrl2;
            
            #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl2 = this.@__BuildControlLiteral1();
            
            #line default
            #line hidden
            
            #line 8 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl2);
            
            #line default
            #line hidden
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(269, 91, false));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.HtmlControls.HtmlHead @__BuildControl__control3() {
            global::System.Web.UI.HtmlControls.HtmlHead @__ctrl;
            
            #line 6 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl = new global::System.Web.UI.HtmlControls.HtmlHead("head");
            
            #line default
            #line hidden
            global::System.Web.UI.HtmlControls.HtmlMeta @__ctrl1;
            
            #line 6 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl1 = this.@__BuildControl__control4();
            
            #line default
            #line hidden
            System.Web.UI.IParserAccessor @__parser = ((System.Web.UI.IParserAccessor)(@__ctrl));
            
            #line 6 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl1);
            
            #line default
            #line hidden
            global::System.Web.UI.HtmlControls.HtmlTitle @__ctrl2;
            
            #line 6 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl2 = this.@__BuildControl__control5();
            
            #line default
            #line hidden
            
            #line 6 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl2);
            
            #line default
            #line hidden
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(172, 197, false));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.LiteralControl @__BuildControl__control7() {
            global::System.Web.UI.LiteralControl @__ctrl;
            @__ctrl = new global::System.Web.UI.LiteralControl("\r\n<body>\r\n    ");
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(369, 14, true));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.LiteralControl @__BuildControl__control8() {
            global::System.Web.UI.LiteralControl @__ctrl;
            @__ctrl = new global::System.Web.UI.LiteralControl("\r\n    <div>\r\n    </div>\r\n    ");
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(415, 29, true));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.HtmlControls.HtmlForm @__BuildControlform1() {
            global::System.Web.UI.HtmlControls.HtmlForm @__ctrl;
            
            #line 11 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl = new global::System.Web.UI.HtmlControls.HtmlForm();
            
            #line default
            #line hidden
            this.form1 = @__ctrl;
            
            #line 11 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl.ID = "form1";
            
            #line default
            #line hidden
            global::System.Web.UI.LiteralControl @__ctrl1;
            
            #line 11 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl1 = this.@__BuildControl__control8();
            
            #line default
            #line hidden
            System.Web.UI.IParserAccessor @__parser = ((System.Web.UI.IParserAccessor)(@__ctrl));
            
            #line 11 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl1);
            
            #line default
            #line hidden
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(383, 68, false));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private global::System.Web.UI.LiteralControl @__BuildControl__control9() {
            global::System.Web.UI.LiteralControl @__ctrl;
            @__ctrl = new global::System.Web.UI.LiteralControl("\r\n</body>\r\n</html>\r\n");
            @__ctrl.SetTraceData(typeof(Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData), new Microsoft.VisualStudio.Web.PageInspector.Runtime.WebForms.TraceData(451, 20, true));
            return @__ctrl;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        private void @__BuildControlTree(default_aspx @__ctrl) {
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            this.InitializeCulture();
            
            #line default
            #line hidden
            global::System.Web.UI.LiteralControl @__ctrl1;
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl1 = this.@__BuildControl__control2();
            
            #line default
            #line hidden
            System.Web.UI.IParserAccessor @__parser = ((System.Web.UI.IParserAccessor)(@__ctrl));
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl1);
            
            #line default
            #line hidden
            global::System.Web.UI.HtmlControls.HtmlHead @__ctrl2;
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl2 = this.@__BuildControl__control3();
            
            #line default
            #line hidden
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl2);
            
            #line default
            #line hidden
            global::System.Web.UI.LiteralControl @__ctrl3;
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl3 = this.@__BuildControl__control7();
            
            #line default
            #line hidden
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl3);
            
            #line default
            #line hidden
            global::System.Web.UI.HtmlControls.HtmlForm @__ctrl4;
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl4 = this.@__BuildControlform1();
            
            #line default
            #line hidden
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl4);
            
            #line default
            #line hidden
            global::System.Web.UI.LiteralControl @__ctrl5;
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__ctrl5 = this.@__BuildControl__control9();
            
            #line default
            #line hidden
            
            #line 1 "c:\users\tangbo\documents\visual studio 2012\Projects\WebForm\WebForm\Default.aspx"
            @__parser.AddParsedSubObject(@__ctrl5);
            
            #line default
            #line hidden
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        protected override void FrameworkInitialize() {
            base.FrameworkInitialize();
            this.@__BuildControlTree(this);
            this.AddWrappedFileDependencies(global::ASP.default_aspx.@__fileDependencies);
            this.Request.ValidateInput();
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        public override int GetTypeHashCode() {
            return 1423172938;
        }
        
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        public override void ProcessRequest(System.Web.HttpContext context) {
            base.ProcessRequest(context);
        }
    }
}

从上面代码,可以看出,aspx Web窗体文件生成的类实现了IHttpHandler接口,并且继承了其对应的代码隐藏类文件,另外我们之前加的Literal控件也作为其成员

技术分享

下面的代码,显示了属性代码片段的实际工作原理

技术分享

 

通过Page.FrameworkInitialize方法,可以看出,其主要通过@__BuildControlTree方法,初始化控件树。

总结语

本章对于Web窗体,及其工作原理做了一个粗略的介绍。

ASP.NET4.5从零开始(1)

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原文地址:http://www.cnblogs.com/kingt-tb/p/4989677.html

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