如何在ViewState中保存div及其副本？(How do I save a div and its contets in ViewState?)

如何在ViewState中保存div及其副本？(How do I save a div and its contets in ViewState?)

我有一个div，其中的内容将通过javascript填充并返回一个图像，但我的问题是：我有4个下拉列表，AutoPostBack = true，它导致我的div的内容消失...如何将图像保存到总是出现？ 我读过有关ViewState的内容，但无法做任何事......

这是我的代码：

<script language="javascript" type="text/javascript"> function fonte(lat, lon) { var src = "http://maps.google.com/maps/api/staticmap?center=" + lat + "," + lon + "&zoom=15&size=540x280&ma‌​ptype=roadmap&markers=color:red|" + lat + "," + lon + "&sensor=false"; testando(src, 540, 280, "Mapa"); } function endereco(endereco) { var fonte = endereco.split(' ').join('+'); var src = "http://maps.google.com/maps/api/staticmap?center=" + fonte + "&zoom=16&size=540x280&ma‌​ptype=roadmap&markers=color:red|" + fonte + "&sensor=false"; testando(src, 540, 280, "Mapa"); } function testando(src, width, height, alt) { var img = document.createElement("img"); img.src = src; img.width = width; img.height = height; img.alt = alt; document.getElementById("mapa").innerHTML=img; } </script>

。净

<div class="formLine" id="mapa1" style="width:100%; height:100%" align="center" runat="server">

我也尝试从div改为panel，但没有改变

<asp:Panel ID="mapa" runat="server" style="width:100%; height:100%" align="center" Visible="true"> </asp:Panel>

I have a div, which contents will be filled via javascript and return an image, but my problemn is: i have 4 dropdownlist with AutoPostBack=true and it causes the content of my div to disappear... How do I save the image to always appear? I've read about ViewState, but couldn't do anything...

Here is my code:

<script language="javascript" type="text/javascript"> function fonte(lat, lon) { var src = "http://maps.google.com/maps/api/staticmap?center=" + lat + "," + lon + "&zoom=15&size=540x280&ma‌​ptype=roadmap&markers=color:red|" + lat + "," + lon + "&sensor=false"; testando(src, 540, 280, "Mapa"); } function endereco(endereco) { var fonte = endereco.split(' ').join('+'); var src = "http://maps.google.com/maps/api/staticmap?center=" + fonte + "&zoom=16&size=540x280&ma‌​ptype=roadmap&markers=color:red|" + fonte + "&sensor=false"; testando(src, 540, 280, "Mapa"); } function testando(src, width, height, alt) { var img = document.createElement("img"); img.src = src; img.width = width; img.height = height; img.alt = alt; document.getElementById("mapa").innerHTML=img; } </script>

.net

<div class="formLine" id="mapa1" style="width:100%; height:100%" align="center" runat="server">

and I also tried to change from div to panel, but nothing changed

<asp:Panel ID="mapa" runat="server" style="width:100%; height:100%" align="center" Visible="true"> </asp:Panel>

最满意答案

没关系，就去吧！ 我唯一做的就是检查我的页面是否回发，然后调用我的javascript！

Nevermind, just go it! The only thing I did was check if my page is post back, then call my javascript!