對于普通的html標簽和普通服務器控件綁定后臺變量（變量一定要public）.cs//加載方式
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asp.net后臺前臺代碼相互綁定大總結

系統 2049 0

一.把后臺代碼寫到前臺去


1 <wbr></wbr> 對于普通的 html 標簽和普通服務器控件綁定后臺變量（變量一定要 public ）

.cs

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>// 加載方式<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span><strong style="font-weight:bold">public</strong><span><wbr></wbr></span>string loadtype;</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><span><wbr></wbr></span>protected void Page_Load(object sender, EventArgs e)<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></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></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><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>// 檢測是否首次加載<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>if (Request.QueryString["loadType"] != null)<br><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>{<br><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>loadtype = Request.QueryString["loadType"].ToString();<br><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>}<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></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></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></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>

.aspx

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>&lt;div style='display:&lt;%=loadtype=="1"?"none":"inline"%&gt;'&gt;............&lt;/div&gt;</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr></wbr></wbr>

先通過 <%= loadtype%>標簽獲取到loadtype，再對loadtype進行判斷， 這個時候<%=loadtype%>可能不變黃，沒有關系。

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2. 在 Gridview 或 repeater 數據綁定控件里綁定后臺變量

<wbr><wbr></wbr></wbr>

我們知道，不是那個角色都可以設置監控點的。那么我需要在綁定的時候，判斷一下，這個人的usertpye是多少。那么怎么辦判斷呢？看代碼：

<wbr><wbr><wbr></wbr></wbr></wbr>

<asp:TemplateField HeaderText="操作">
<ItemTemplate>
<a href="EditUser.aspx?userId=<%# eval_r("ID") %>">修改</a>

<a href="EditPWD.aspx?userId=<%# eval_r("ID") %>">重設密碼</a>
<%#Convert.ToUInt32(eval_r("UserType")) == 7 ?

"<a href=../Point.aspx?userid=" + eval_r("ID") + ">分配監控點</a>" : ""%>

<wbr><wbr><wbr>&lt;/ItemTemplate&gt;<br><wbr><wbr><wbr>&lt;/asp:TemplateField&gt;</wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr></wbr></wbr></wbr>

簡單吧！其實其他的控件如repeater,datalist等等，都可以效法！

<wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr>

我們再看一例：

<asp:LinkButton ID="linkbtnCloseOrOpen" runat="server" CommandName='<%#eval_r("IsClosed") %>' CommandArgument='<%#eval_r("ID") %>'>
<%#bool.Parse(eval_r("IsClosed").ToString())?"打開監控點":"關閉監控點" %>
</asp:LinkButton>

<wbr><wbr></wbr></wbr>

<wbr><wbr></wbr></wbr>

3.引申——綁定后臺方法

由1,2的區別，看二者3的區別——也就是<%=%>和<%#%>綁定方法的區別，懂了吧！ asp.net前臺綁定后臺代碼大總結

<%=Add()%>

<%#Add()%>

拿第二種舉個例子吧

在后臺有這樣的方法

<wbr></wbr>

<wbr>public Test_Paper GetPaper(int id)</wbr>

{

<wbr><wbr><wbr><wbr>return BLL.Test_PaperBLL.ReadTestPaperByID(id);</wbr></wbr></wbr></wbr>

}

在前臺這樣用
<%#GetPaper(Convert.ToInt32(eval_r("PaperNum"))).Name %>)

需要注意的是 eval_r("PaperNum")獲取的是object類型，注意類型轉化。

再看例子
<%#GetChoose(eval_r("QId")).OptionA == null ? "" : "<input type='radio' name='choose"+eval_r("QId")+"'>A." + GetChoose(eval_r("QId")).OptionA + "</input>"%>


4.<%%>干嗎用啊？

這樣用：

<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></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>&lt;%<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>int countValue = id;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>%&gt;</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>

<div<wbr><wbr><span><wbr></wbr></span>style='display:&lt;%=countValue==1?"none":"inline"%&gt;'&gt;&lt;/div&gt;</wbr></wbr>

<wbr><wbr></wbr></wbr>

①<%%>中可以獲取后臺中public的字段，像例子中的id

②可以聲明變量

③變量可以再前臺使用

④可以再<%%>對后臺的數據進行一些邏輯操作，當然，這種邏輯操作可以在后臺完成，再在前臺獲取后臺方法，如本文的第三個大標題一樣！

<wbr><wbr></wbr></wbr>

<wbr><wbr></wbr></wbr>

再看一例

<%if (user.CompanyId==1)
{<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><br><wbr><wbr>%&gt;<br></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></wbr></wbr> <wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;tr&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;td align="left" class="box"<wbr><wbr><span><wbr></wbr></span>onclick="hiddenTree('table13'住建局安辦&lt;/td&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;/tr&gt;<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;tr&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;td align="left" class="text3"&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;table id="table13" style="display:none;" width="100%" border="0" cellspacing="0"</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></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>cellpadding="0"&gt;<wbr><wbr><br><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><span><wbr></wbr></span>&lt;tr&gt;<br><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><span><wbr></wbr></span>&lt;td align="left" class="text3"&gt;&lt;a href="/Manage/CheckPoints.aspx"</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></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><wbr><wbr><span><wbr></wbr></span>target="mainFrame"&gt;住建局監控&lt;/a&gt;&lt;/td&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>&lt;/tr&gt;<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><span><wbr></wbr></span><wbr><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;/table&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;/td&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;/tr&gt;<br><strong style="font-weight:bold">&lt;%} %&gt;</strong><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></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></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>

二把前臺代碼寫到后臺去


我們不僅可以在前臺寫代碼，也可以在后臺寫前臺的代碼

<wbr><wbr></wbr></wbr>

比如：

<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>&lt;table width="100%" border="0" cellspacing="0" cellpadding="0"&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><strong style="font-weight:bold"><span style="color:#ed1c24; line-height:21px; word-wrap:normal; word-break:normal">&lt;%=str2.ToString()%&gt;<br></span></strong><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;tr&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;td width="37%" height="30"&gt;&lt;/td&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;td width="31%" height="30"&gt;&lt;/td&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;td width="32%" height="30"&gt;&amp;nbsp;&lt;/td&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>&lt;/tr&gt;<br><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><span><wbr></wbr></span>&lt;/table&gt;</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></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>

那么在后臺的話：

<wbr><wbr></wbr></wbr>

j += 1;
str2.Append("<tr>");
str2.Append("<td id=\"td2" + j + "\" width=\"37%\" height=\"30\" align=\"left\">");
str2.Append(j <wbr>+ GetEvaluation(resultInfo.EvaluationID).Evaluation);<br> str2.Append("&lt;/td&gt;");<br> str2.Append("&lt;td width=\"31%\" height=\"30\"&gt;");</wbr>

str2.Append("<input name=\"resultId2" + j + "\" value=\"" + resultInfo.ID + "\" type=\"hidden\">");
..............................................................................

str2.Append("</tr>");

參考代碼：

http://blog.csdn.net/woshixuye/article/details/7218777

asp.net后臺前臺代碼相互綁定大總結


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