100165679.htm

来自「C#高级编程(第三版),顶死你们。。 。up」· HTM 代码 · 共 301 行 · 第 1/2 页

    
    </div>
    </td>
   </tr>
  </table>
  </span>&nbsp;</td>
 </tr>
</table>

</span><span style='position:absolute;z-index:2;left:0px;margin-left:71px;
margin-top:86px;width:113px;height:35px'>

<table cellpadding=0 cellspacing=0>
 <tr>
  <td width=113 height=35 style='vertical-align:top'><span style='position:
  absolute;left:0pt;z-index:2'>
  <table cellpadding=0 cellspacing=0 width="100%">
   <tr>
    <td>
    <div style='padding:3.6pt 7.2pt 3.6pt 7.2pt'>
    <p class=MsoNormal style='FTEL:7.7pt'><span lang=EN-US
    style='font-size:7.5pt'>ASP.NET</span><span style='font-size:7.5pt;
    font-family:宋体'>在</span><span lang=EN-US style='font-size:7.5pt'>HTTP</span></p>
    
    
    
    
    
    
    
    
    
    
    </div>
    </td>
   </tr>
  </table>
  </span>&nbsp;</td>
 </tr>
</table>

</span><span style='position:absolute;z-index:3;left:0px;margin-left:296px;
margin-top:0px;width:101px;height:36px'>

<table cellpadding=0 cellspacing=0>
 <tr>
  <td width=101 height=36 style='vertical-align:top'><span style='position:
  absolute;left:0pt;z-index:3'>
  <table cellpadding=0 cellspacing=0 width="100%">
   <tr>
    <td>
    <div style='padding:3.6pt 7.2pt 3.6pt 7.2pt'>
    <p class=MsoNormal style='FTEL:0cm'><span lang=EN-US
    style='font-size:7.5pt'>.aspx</span><span style='font-size:7.5pt;
    font-family:宋体'>资源中的</span></p>
    
    
    
    
    
    </div>
    </td>
   </tr>
  </table>
  </span>&nbsp;</td>
 </tr>
</table>

</span><span lang=EN-US><img width=428 height=222 src="25/image002.jpg"></span></p>

<p align=center style='FTEL:8.15pt'><span style='font-family:宋体'>图</span><span
lang=EN-US>&nbsp; 25-1</span></p>

<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span
style='font-family:宋体'>对应已生成资源的窗体内容，例如</span><span lang=EN-US>HTML</span></p>

<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span
style='font-family:宋体'>客户端的脚本代码</span></p>

<p class=1 style='margin-left:37.55pt;FTEL:-16.1pt'><span lang=EN-US>●<span
style='font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span
style='font-family:宋体'>内嵌的</span><span lang=EN-US>ASP.NET</span><span
style='font-family:宋体'>服务器控件</span></p>

<p class=MsoNormal><span style='font-family:宋体'>实际上，</span><span lang=EN-US>ASP.NET</span><span
style='font-family:宋体'>文件也可以很简单，如下所示。</span></p>

<p class=2 style='margin-top:8.15pt;margin-right:0cm;FTEL:8.15pt;
margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>Hello!</span></p>

<p class=MsoNormal><span style='font-family:宋体'>结果很简单，返回一个只包含这个文本的</span><span
lang=EN-US>HTML</span><span style='font-family:宋体'>页面</span><span lang=EN-US>(</span><span
style='font-family:宋体'>因为</span><span lang=EN-US>ASP.NET</span><span
style='font-family:宋体'>页面的默认输出是</span><span lang=EN-US>HTML)</span><span
style='font-family:宋体'>。</span></p>

<p class=MsoNormal><span style='font-family:宋体'>本章后面会提到，也可以把代码的某些部分分解为其他文件，这可以提供更合理的结构。</span></p>

<h3 style='margin-top:8.15pt;margin-right:0cm;FTEL:8.15pt;margin-left:
0cm'><a FTEL="_Toc507815267"></a><a FTEL="_Toc507815247"><span lang=EN-US>ASP.NET</span></a><span
style='font-family:黑体'>中的状态管理</span></h3>

<p class=MsoNormal><a FTEL=statemanagement><span lang=EN-US>ASP.NET</span></a><span
style='font-family:宋体'>页面的一个重要属性是它们是无状态的。在默认情况下，在用户的请求之间，并没有信息存储在服务器上</span><span
lang=EN-US>(</span><span style='font-family:宋体'>但有一些方法可以完成存储信息的任务，详见下面的内容</span><span
lang=EN-US>)</span><span style='font-family:宋体'>。这初看起来有点奇怪，因为状态管理对于用户友好的交互会话是非常重要的。但是，</span><span
lang=EN-US>ASP.NET</span><span style='font-family:宋体'>提供了一种相当好的方式来解决这个问题，使会话管理几乎是完全透明的。</span></p>

<p class=MsoNormal><span style='font-family:宋体'>基本上，</span><span lang=EN-US>Web</span><span
style='font-family:宋体'>窗体上控件的状态信息</span><span lang=EN-US>(</span><span
style='font-family:宋体'>包括文本框中输入的数据、下拉列表中的选项等</span><span lang=EN-US>)</span><span
style='font-family:宋体'>存储在隐藏的</span><span lang=EN-US>viewstate</span><span
style='font-family:宋体'>字段中，这个字段是服务器生成的页面的一部分，并传送给用户。后续的操作称为</span><span
lang=EN-US>postback</span><span style='font-family:宋体'>，例如触发事件，需要服务器端进行处理</span><span
lang=EN-US>(</span><span style='font-family:宋体'>如提交窗体数据，把这些信息传送回服务器</span><span
lang=EN-US>)</span><span style='font-family:宋体'>。在服务器上，这些信息用于重新填充页面对象模型，以便操作它，就像在本地进行修改一样。</span></p>

<p class=MsoNormal><span style='font-family:宋体'>稍后详细介绍这个主题。</span></p>

</div>
                <!-- page -->
                <div class="page" style="text-align: center">
                    <a href="100165653.htm">上一页</a>&nbsp;&nbsp;&nbsp;<a href="index.html">首页</a>&nbsp;&nbsp;&nbsp;<a href="100165680.htm">下一页</a>
                </div>
                <div style="margin: 0px auto; width: 700px; border: solid 1px #0b5f98;">
                    <div style="float: left; width: 16px; background-color: #0b5f98; color: White; padding: 1px;">
                        图书导读
                    </div>
                    <div style="float: right; width: 670px; text-align: left; line-height: 16pt; padding-left: 2px">
                        <!--导读-->
                        <h1 id="divCurrentNode2" style="color: #b83507; width: 100%; text-align: left; font-size: 12px; padding-left: 2px">当前章节:<a href='100165679.htm'><font color='red'>25.1  ASP.NET概述</font></a></h1>
                        <div id="divRealteNod2" style="padding-left: 2px">
                        <div style='float:left;width:49%'>·<a href='100165651.htm'>23.8.3  读写DiffGram</a></div><div style='float:right;width:49%'>·<a href='100165652.htm'>23.9  在XML中串行化对象</a></div><div style='float:left;width:49%'>·<a href='100165653.htm'>23.10  小结</a></div><div style='float:right;width:49%'>·<a href='100165680.htm'>25.2  ASP.NET Web窗体(1)</a></div><div style='float:left;width:49%'>·<a href='100165681.htm'>25.2  ASP.NET Web窗体(2)</a></div><div style='float:right;width:49%'>·<a href='100165682.htm'>25.2  ASP.NET Web窗体(3)</a></div></div>
                    </div>
                </div>
                </div>
            <!-- 评论 -->
            <!-- 今日推荐 -->
            </div>
        <!-- 页脚 -->
        <div id="foot">
         <img src="../../book/readbook.aspx@node=5679&bookid=16&bookname=25.1++ASP.NET_25b8_25c5_25ca_25f6" alt="" width="0" height="0" />
        <style>

        </div>
</body>
</html>