在.aspx中如何来使用.cs中声明的变量啊?

sunnystroller 2004-08-30 12:30:35
我用的是VS.net2003在做试验,在.apsx中我加了如下代码:
<iframe src="<%# viewFile %></iframe>,目的是想点击不同的按钮,<iframe>中显示不同的页面,我只要在点击按钮的事件中来修改viewFile的值就可以了,viewFile已经声明,并在Page_load()事件中有如下代码:
if (!IsPostBack)
{
string viewFile= "top.htm";
Page.DataBind();
}
可就是在运行时显示<iframe src=""></iframe>,看不到我要显示的页面,请问是什么原因,我要如何来完成该试验呢?谢谢!!
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sunnystroller 2004-08-30
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各位兄弟,除了“net_lover(孟子E章)”兄台的方法我没有用过,其它的在我发帖前都已经试过了,都不可以,现在我去试试“net_lover(孟子E章)”的办法,谢谢诸位
sbkyv 2004-08-30
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<%=viewFile %>
xueqs 2004-08-30
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要把viewFile声明成页面级公共变量。在Page_Load方法上面声名public string viewFile
然后<iframe src=<%=viewFile %></iframe>
孟子E章 2004-08-30
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<iframe runat="server" id="iframe1"></iframe>


HtmlGenericControl iframe1;
iframe1.src="top.htm";
wang790809 2004-08-30
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string viewFile= "top.htm";
Page.DataBind();
去掉if (!IsPostBack)
rickjelly2004 2004-08-30
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response.write("<iframe src="<%# viewFile %></iframe")
rickjelly2004 2004-08-30
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response.write()
lkk2073 2004-08-30
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public string viewFile;
速马 2004-08-30
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protected string str = "123";

<%=str%>
sunnystroller 2004-08-30
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net_lover(孟子E章) ,谢谢,你讲的很透彻,以后还要多指点啊,我是第一次作asp.net的项目,还不是很熟悉,多谢了!!
孟子E章 2004-08-30
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<iframe src='<%#xx%>' style=""></iframe>

尽管该语法看起来与 ASP 的 Response.Write 快捷方式 <%= %> 相似,但其行为完全不同。ASP Response.Write 快捷方式语法在处理页时计算,而 ASP.NET 数据绑定语法仅在调用 DataBind 方法时计算。

DataBind 是页和所有服务器控件的方法。当在父控件上调用 DataBind 时,它级联到该控件的所有子控件。例如,DataList1.DataBind() 将因此对 DataList 模板中的每一控件调用 DataBind 方法。在页上调用 DataBind — Page.DataBind() 或只是 DataBind() — 会导致计算页上的所有数据绑定表达式。通常从 Page_Load 事件调用 DataBind,如下例所示。



你原来好像少写了"啊:)
孟子E章 2004-08-30
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也可以

<iframe src='<%#xx%>' style=""></iframe>

public string xx ;


private void Page_Load(object sender, System.EventArgs e)
{
xx = "http://dotnet.aspx.cc/";
Page.DataBind();
流星亚瑟 2004-08-30
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简单声明的变量在多次回传时,值不能保持
在每次回传时,变量都会被重新初始化,若回传过程中未被赋值,只能返回空值
若让其保持值,最好把它保存在ViewState或Session里
孟子E章 2004-08-30
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也是可以的

<iframe src='<%=xx%>'></iframe>


public string xx ;


private void Page_Load(object sender, System.EventArgs e)
{
xx = "http://dotnet.aspx.cc/";
coolshun 2004-08-30
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.aspx里可以访问.cs中页面类的public 和protected成员,不能访问private成员。
sunnystroller 2004-08-30
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我原来的方法错在那里呢????请各位指点
dangdangdangdang 2004-08-30
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这个方法肯定有效。我测试过。
在aspx中写入<iframe runat="server" id="iframe1"></iframe>
然后在后台*.cs中写入button的点击时间中写入
iframe1.Attributes["src"]="xxx.aspx";
sunnystroller 2004-08-30
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net_lover(孟子E章) 就是厉害 啊,你这最后一招太好使了,请问我原来的方法为什么不可以呢??谢谢!!
孟子E章 2004-08-30
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<iframe runat="server" id="iframe1"></iframe>

protected HtmlGenericControl iframe1;

private void Page_Load(object sender, System.EventArgs e)
{
iframe1.Attributes.Add("src","http://dotnet.aspx.cc/");
孟子E章 2004-08-30
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<iframe runat="server" id="iframe1"></iframe>

protected HtmlGenericControl iframe1;

private void Page_Load(object sender, System.EventArgs e)
{
iframe1.Attributes.Add("src","http://dotnet.aspx.cc/");
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