在HTML中嵌入服务器端C#代码的方式

在HTML中嵌入服务器端C#代码的方式
1 <%=变量或者函数%>
<wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>例如：&lt;input value="&lt;%=myName%&gt;"/&gt;</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>特点：这种代码只能写在非服务器端代码中，如果写在有runat="server"的控件中，将不起作用。</span><br style=""><span style="">2 &lt;%#变量或者函数%&gt;</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>例如：&lt;asp:Button ID="butTest" runat="server" Text="&lt;%#myButName%&gt;" /&gt;</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>特点：需要调用绑定方法，在后台页面的pageload事件中调用：Page.DataBind();</span><br style=""><br style=""><span style="">3 &lt;script runat="server"&gt;</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>string strTest = "前台页面中输出！";</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>protected void Page_Load(object sender, EventArgs e)</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>{</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>Response.Write(strTest);</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>}</span><br style=""><span style=""></span><wbr style=""><span style=""><span></span>&lt;/script&gt;</span><br style=""><span style="">这种比较少用，如果要这么写，就直接在后台写代码可以了。</span><br style=""><br style=""><span style="">4 &lt;% c#代码 %&gt;</span><br style=""><span style="">这种是最早的ASP时代的代码，现在ASP.NET依然支持，不过一般很少用。</span><br style=""><br style=""><span style="">对于第1种，比如又需要在前台绑定后台变量，又需要在后台应用对应的控件对象，则需要将该控件设置为 runat="server",这时候第一种语法不起作用，又不想用第2中方式进行绑定，则麻烦一点可以用客户端js来实现，在js中使用服务器端的变量，然后更新前台的控件即可。</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>例如：</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>&lt;input id="txtPageSize" runat="server" style="width:28px; border-left:0px; border-right:0px; border-top:0px; border-bottom:1px solid #dddddd; text-align:center;"/&gt;条</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>&lt;script type="text/javascript"&gt;</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>document.getElementByIdx_x("txtPageSize").value=&lt;%=pageBar.PageSize%&gt;;</span><br style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""></span><wbr style=""><span style=""><span></span>&lt;/script&gt;</span> </wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>