【发布时间】：2015-07-07 13:43:59
【问题描述】：
下面是我简化的 .aspx 文件。有时，单击“更新预览”按钮后，包含已修改 .pdf 文件的 iframe 会显示最新文件。不过，有时需要多次点击，iframe 才会显示最新文件。
即使我直接在新窗口中重定向到文件，.pdf 文件仍然不是最新的！ （不过，在我的服务器磁盘上）
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="pdfwebform.WebForm1" %>
<script runat="server">
void download_Click(object sender, EventArgs e)
{
Response.Redirect("http://dev-db-02/pdf/catalog.pdf");
}
void Button1_Click(object sender, EventArgs e)
{
string answer = call_pdf(make_new, retails_array, restypes_array, selected_kids, brands_array);
if (answer != "failed")
{
label1.Text = "Done!";
}
else
{
label1.Text = "No models meet selected criteria.";
}
}
</script>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Generate PDF Catalog</title>
<link href="theme.css" rel="stylesheet" type="text/css" />
<!--
<style type="text/css">
.auto-style1 {
width: 100%;
height: 105px;
}
.auto-style2 {
width: 557px;
}
</style>
-->
<style type="text/css">
.auto-style1 {
width: 84%;
}
.auto-style2 {
text-align: left;
width: 87px;
}
.auto-style3 {
text-align: left;
width: 486px;
}
</style>
</head>
<body>
<script type="text/javascript">
function appear() {
document.getElementById("preview").style.display = 'block';
}
</script>
<script type="text/javascript">
function updatepreview() {
if (document.getElementById("label1").innerHTML != "") {
var iframe = document.getElementById("preview1");
iframe.src = iframe.src;
iframe.src = iframe.src;
iframe.src = iframe.src;
}
else{
document.getElementById("label1").innerHTML = "Please Wait...";
}
}
</script>
<script type="text/javascript">
function update_iframe() {
var iframe = document.getElementById("preview1");
iframe.src = iframe.src;
iframe.src = iframe.src;
iframe.src = iframe.src;
}
</script>
<script type="text/javascript">
function dot() {
if (document.getElementById("label1").innerHTML == "d") {
document.getElementById("label1").innerHTML = "nope";
}
else {
document.getElementById("label1").innerHTML = "d";
}
}
</script>
<h1>Generate PDF Catalog</h1>
<form id="form1" runat="server">
<!-- <embed id="preview" src="http://dev-db-02/pdf/catalog.pdf" width="500px" height="500px" runat="server" /> -->
<iframe id="preview1" src="http://dev-db-02/pdf/catalog.pdf" width="500" height="500" runat="server"></iframe>
<!-- Add to File Feature
<asp:RadioButtonList ID="RadioButtonList1" runat="server">
<asp:ListItem Selected="True" Value="new">Create New PDF</asp:ListItem>
<asp:ListItem Value="old">Add to Existing PDF</asp:ListItem>
</asp:RadioButtonList>
-->
<table class="auto-style1">
<tr>
<td class="auto-style2">
<b>Retail:<br />
</b>
<asp:ListBox ID="ListBox5" runat="server" Height="45px" SelectionMode="multiple" Width="230px">
<asp:ListItem Selected="True" Value="Yes">Yes</asp:ListItem>
<asp:ListItem Value="No">No</asp:ListItem>
</asp:ListBox>
<b>
<br />
<br />
Res Type:</b><br />
<asp:ListBox ID="ListBox4" runat="server" SelectionMode="Multiple" Height="69px" Width="230px">
<asp:ListItem Selected="True" Value="OPTICAL">OPTICAL</asp:ListItem>
<asp:ListItem Value="KIDS">KIDS</asp:ListItem>
<asp:ListItem Value="SUN">SUN</asp:ListItem>
</asp:ListBox>
<br />
<br />
<b>Brand:</b><br />
<asp:ListBox ID="ListBox3" runat="server" Height="142px" Width="230px" SelectionMode="multiple" >
<asp:ListItem Selected="True" Value="'AS'">ASPIRE</asp:ListItem>
<asp:ListItem Value="'BCBG'">BCBGMAXAZRIA</asp:ListItem>
<asp:ListItem Value="'CVO'">CLEARVISION</asp:ListItem>
<asp:ListItem Value="'CH'">COLE HAAN</asp:ListItem>
<asp:ListItem Value="'DD'">DILLI DALLI</asp:ListItem>
<asp:ListItem Value="'DH'">DURAHINGE</asp:ListItem>
<asp:ListItem Value="'ET'">ELLEN TRACY</asp:ListItem>
<asp:ListItem Value="'IZOD'">IZOD</asp:ListItem>
<asp:ListItem Value="'IZX'">IZOD PERFORMX</asp:ListItem>
<asp:ListItem Value="'JMC'">JESSICA MCCLINTOCK</asp:ListItem>
<asp:ListItem Value="'JC'">JUNCTION CITY</asp:ListItem>
<asp:ListItem Value="'ME'">MARC ECKO</asp:ListItem>
<asp:ListItem Value="'OP'">OCEAN PACIFIC</asp:ListItem>
<asp:ListItem Value="'PT'">PURITI</asp:ListItem>
</asp:ListBox>
<br />
<br />
<br />
</td>
<td colspan="3">
<asp:Label id="label1" runat="server" Font-Bold="true" onchange="updatepreview()"></asp:Label>
<br />
<!-- <embed id="preview" src="http://dev-db-02/pdf/catalog.pdf" width="500px" height="500px" runat="server" /> -->
<iframe id="preview1" src="http://dev-db-02/pdf/catalog.pdf" width="500" height="500" runat="server"></iframe>
<br />
<!-- <iframe id="frame" style="display:none"></iframe> -->
<!-- <a href="javascript:download('http://dev-db-02/pdf/catalog.pdf')">download</a> -->
</td>
</tr>
<tr>
<td class="auto-style2">
<asp:Button id="Button1" runat="server" Font-Bold="True"
Font-Names="Verdana" Font-Size="12" OnClick="Button1_Click" OnClientClick="updatepreview()"
Text="Submit"></asp:Button>
</td>
<td class="auto-style3">
*<font size="3">Hold Control/Command
<br />
+ Click to select multiple</font>
</td>
<td class="auto-style3">
<font size="3">
<asp:Button ID="Button2" runat="server" Text="Update Preview" OnClientClick="update_iframe()" />
</font>
</td>
<td class="align-right">
</td>
</tr>
</table>
<br />
<br />
</div>
</form>
<script type="text/javascript">
function download() {
window.open("http://dev-db-02/pdf/catalog.pdf");
}
</script>
</body>
</html>
【问题讨论】：
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标签： javascript c# jquery asp.net iframe