脚本与后端数据传递小技巧
2007-06-15 10:07
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表单中input标签为文本框,其提供了一个隐藏域,可以用来保存输入的内容,像div这样的标签,即使使用脚本使其内部值发生了变化,但是无法保存值,所以隐藏域的作用就提升了.可以来测试下.
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
<%
![](http://www.cnblogs.com/Images/dot.gif)
@ Page Language="C#" %>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
<script runat="server">
![](http://www.cnblogs.com/Images/dot.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
protected void Button2_Click(object sender, EventArgs e)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Label1.Text = HiddenField1.Value + TextBox1.Text + aaa.InnerHtml;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</script>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<html xmlns="http://www.w3.org/1999/xhtml" >
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<head runat="server">
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<title>无标题页</title>
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
<script language="javascript" type="text/javascript">
![](http://www.cnblogs.com/Images/dot.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
// <!CDATA[
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
function aa()
![](http://www.cnblogs.com/Images/dot.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
document.getElementById("HiddenField1").value="a";
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
document.getElementById("TextBox1").value="b";
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
document.getElementById("aaa").innerHTML="c";
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
// ]]>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</script>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</head>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<body>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<form id="form1" runat="server">
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<input id="Hidden1" type="hidden" />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<asp:HiddenField ID="HiddenField1" runat="server" />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<div id="aaa" runat="server"></div>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<br />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<input id="Button1" type="button" value="button" onclick="aa()" />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="Button" />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</form>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</body>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</html>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
这样的使用方法在控件中非常常用,AjaxControlToolkit的基类ExtenderControlBase也使用了这样了方法,其提供了ClientState属性可以获取隐藏域的值.方便了前台和后台的交互
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
<%
![](http://www.cnblogs.com/Images/dot.gif)
@ Page Language="C#" %>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
<script runat="server">
![](http://www.cnblogs.com/Images/dot.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
protected void Button2_Click(object sender, EventArgs e)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Label1.Text = HiddenField1.Value + TextBox1.Text + aaa.InnerHtml;
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</script>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<html xmlns="http://www.w3.org/1999/xhtml" >
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<head runat="server">
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<title>无标题页</title>
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
<script language="javascript" type="text/javascript">
![](http://www.cnblogs.com/Images/dot.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
// <!CDATA[
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
function aa()
![](http://www.cnblogs.com/Images/dot.gif)
{
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
document.getElementById("HiddenField1").value="a";
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
document.getElementById("TextBox1").value="b";
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
document.getElementById("aaa").innerHTML="c";
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
// ]]>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</script>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</head>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<body>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<form id="form1" runat="server">
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<input id="Hidden1" type="hidden" />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<asp:HiddenField ID="HiddenField1" runat="server" />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<div id="aaa" runat="server"></div>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<br />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<input id="Button1" type="button" value="button" onclick="aa()" />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="Button" />
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</form>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</body>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
</html>
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
这样的使用方法在控件中非常常用,AjaxControlToolkit的基类ExtenderControlBase也使用了这样了方法,其提供了ClientState属性可以获取隐藏域的值.方便了前台和后台的交互
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