blocks|key|4690115|text|从您的代码片段中准确地判断发生了什么有点困难，但我假设您将pdf文件作为print()函数的一部分输出到响应流。这将在加载时显示pdf，因为后台代码是在呈现时(就在它将代码发送到浏览器之前)计算的，而不是在客户机上计算。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4690116|要获得您想要的行为，最好的方法是创建一个http处理程序文件(ashx)，它将接受任何需要的参数作为url上的请求变量，然后将pdf输出到流。|4690117|然后，您只需使用正确的参数创建一个指向ashx文件的href即可显示文档。|4690118|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Its a bit hard to tell exactly what is happening from your code snippet, but I would assume that you are outputting the pdf file to the response stream as part of the print() function.
This is will display the pdf on load because the code behind is evaluated at render time (just before it sends the code to the browser) instead of being evaluated on the client.

To get the behavior you would like the best method is to create a http handler file (ashx) that will accept any required arguments as request variables on the url and will then output the pdf to the stream.

You can then just create a href to the ashx file with the correct arguments to dispaly the document.

blocks|key|1055039|text|您希望使用HyperlinkControl并将OnClick事件处理程序连接到Print方法后面的代码。当用户单击该链接时，页面将回发，并引发OnClick事件。从那里你可以打印你的PDF。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1055040|在您的示例中，Print()函数是在页面加载时计算的。带有<%25+%25>和<%25=+%25>括号的任何内容都会在渲染时求值。|1055041|做你想做的事情的最好方法是在你的页面上有一个链接，它重定向到一个ASHX页面，然后将PDF直接输出到响应流中。应该有很多关于如何在这个地方(Google+ashx)这样做的例子。链接将如下所示：|1055042|<a+href="PrintMyPdf.ashx?PageID=<%25=+CurrentPageId+%25>">Print</a>|code-block|syntax|javascript|1055043|这将向ashx传递一个参数"PageID“，您可以从中确定要打印的页面。<%25=+%25>语法计算表达式(在本例中是代码中的属性，但它可以是方法或形式)，并将结果插入到页面的该部分。|1055044|因此，如果您的属性是：|1055045|protected+int+CurrentPageId+{+get+{+return+4;+}+}|1055046|它将在您的页面中写入以下内容：|1055047|<a+href="PrintMyPdf.ashx?PageID=4">Print</a>|1055048|抢夺|1055049|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|H|7|14|8|@]|9|@]|A|$I|J]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|H|7|16|8|@]|9|@]|A|$I|J]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

You want to use a HyperlinkControl and wire up the OnClick event handler to your code behind Print method. When the user then clicks on the link, the page will post back and the OnClick event gets raised. From there you can print your PDF.

In your example the Print() function is getting evaluated when the page loads. Anything withing &lt;% %> and &lt;%= %> brackets gets evaluated at render time.

The best way to do what you want is to have a link on your page that redirects to a ASHX page that then outputs the PDF directly into the response stream. There should be plenty of examples on how this is done around the place (Google ashx). The link would look like this:

<pre><code>&lt;a href="PrintMyPdf.ashx?PageID=&lt;%= CurrentPageId %&gt;"&gt;Print&lt;/a&gt;
</code></pre>

This will pass a parameter "PageID" to the ashx from which you can determine what page you want to print. The &lt;%= %> syntax evaluates the expression (in this case a property in your code behind, but it could be a method or forumla) and inserts the result in that part of the page.

So if you property was:

<pre><code>protected int CurrentPageId { get { return 4; } }
</code></pre>

It would write the following to your page:

<pre><code>&lt;a href="PrintMyPdf.ashx?PageID=4"&gt;Print&lt;/a&gt;
</code></pre>

Rob

blocks|key|4690194|text|<a+href="javascript:void(0);"+onclick=<%25+Print();+%25>+title="Print+listings">Print</a>|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4690195|你不能这么做。我知道你在想什么，但这是不可能的，而且(对不起)太天真了。|unstyled|4690196|4690197|+写道：|blockquote|offset|length|style|BOLD|4690198|4690199|问题是，当我写这段代码时，当我进入这个页面时，它会在加载时打印成pdf格式，我以为它会等待点击，但实际上它会执行打印。|4690200|4690201|这绝对是有道理的。您需要做的是将对()函数的调用放入不同的网页中，然后在您的onclick+event中通过AJAX调用此网页。|4690202|entityMap^0|0|0|0|1|3|0|0|0|0|H|C|12|D|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|Y|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|Z|8|@$K|10|L|11|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|F|7|12|8|@]|9|@]|A|$]]|$1|P|3|Q|5|F|7|13|8|@]|9|@]|A|$]]|$1|R|3|-4|5|F|7|14|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|15|8|@$K|16|L|17|M|N]|$K|18|L|19|M|N]]|9|@]|A|$]]|$1|U|3|-4|5|F|7|1A|8|@]|9|@]|A|$]]]|V|$]]

<pre><code>&lt;a href="javascript:void(0);" onclick=&lt;% Print(); %&gt; title="Print listings"&gt;Print&lt;/a&gt;
</code></pre>

You can't do this. I know what you're thinking but it's impossible and rather (excuse me) naive.

<blockquote>
 nmiranda wrote:
 
 The problem is that when I coded this
 it happens that when I go this page it
 prints to pdf when is loading, I
 thought it would wait for a click but
 instead it performs the printing.
</blockquote>

This makes absolute sense. What you need to do is to put call on Print() function into different webpage and then call this webpage by AJAX in your onclick event.

blocks|key|4690213|text|您只需要另一个页面来打印PDF文档。假设页面是printPDF.aspx|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4690214|您只需将您的链接更改为|4690215|<a+href="printPDF.aspx"+title="Print+listings">Print</a>|code-block|syntax|javascript|4690216|如果您必须向它传递参数，那么我会将链接更改为|4690217|<a+href="javascript:void(0);"+onlick="javascript:GoToPrint();"+title="Print+listings">Print</a>|4690218|脚本：|4690219|<script>
++++function+GoToPrint()
++++{
++++++++window.location+=+'printPDF.aspx?var1=x&var2=y';
++++}
</script>|4690220|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

You just need to have another page that does the printing of the PDF document. Let's say that page is printPDF.aspx

You just have to change your link to be

<pre><code>&lt;a href="printPDF.aspx" title="Print listings"&gt;Print&lt;/a&gt;
</code></pre>

If you have to pass parameters to it then i would do change the link to be

<pre><code>&lt;a href="javascript:void(0);" onlick="javascript:GoToPrint();" title="Print listings"&gt;Print&lt;/a&gt;
</code></pre>

Script:

<pre><code>&lt;script&gt;
 function GoToPrint()
 {
 window.location = 'printPDF.aspx?var1=x&amp;var2=y';
 }
&lt;/script&gt;
</code></pre>

blocks|key|3222556|text|最后我做到了，我必须澄清，首先，我所有的报告都是使用另一个网页制作的，根据我收到的回复，我意识到我使用href调用同一页面内的报告的方法是不正确的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3222557|因此，我分析了罗伯特·瓦格纳的建议，并尝试了这种方法；|3222558|protected+void+btnPrint_Click(object+sender,+EventArgs+e)
{
++++...
++++string+url+=+GetUrlWithParameters();

++++string+reportscript+=+"<script+language='JavaScript'>"+%2B
++++++++"window.open('"+%2B+url+%2B+"',+'CustomPopUp',+"+%2B
++++++++"'width=400,+height=400,+resizable=yes,+scrollbars=yes')"+%2B
++++++++"</script>";

++++Page.RegisterStartupScript("reportscript",+reportscript);
++++...|code-block|syntax|javascript|3222559|在GetUrlWithParameters()中，我构造和url调用一个生成报表的ashx，这个ashx根据一些问题接收不同的参数，它工作得非常好。|3222560|它执行脚本，并根据我的需要在另一个窗口中显示pdf。|3222561|谢谢。|3222562|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Finally I made it, I have to clear that first of all I made all my reports using another web page, according to the responses I received I realized that my apprroach to call a report within the same page using a href was not correct.

So, I analized Robert Wagner suggestion and I tried this approach;

<pre><code>protected void btnPrint_Click(object sender, EventArgs e)
{
 ...
 string url = GetUrlWithParameters();

 string reportscript = "&lt;script language='JavaScript'&gt;" +
 "window.open('" + url + "', 'CustomPopUp', " +
 "'width=400, height=400, resizable=yes, scrollbars=yes')" +
 "&lt;/script&gt;";

 Page.RegisterStartupScript("reportscript", reportscript);
 ...
</code></pre>

In GetUrlWithParameters() I construct and url calling an ashx where I produce my report, the ashx receives different parameters according to some issues and it worked very nice.

It executes the script and shows the pdf in another windows exactly as I needed.

Thanx.

I have this code in my aspx page;

<pre><code>&lt;a href="javascript:void(0);" onclick=&lt;% Print(); %&gt; title="Print listings"&gt;Print&lt;/a&gt;
</code></pre>

which presents a link to print a listings to a pdf when the user clicks on it; as you can note the script calls a function from the behind code.

The problem is that when I coded this it happens that when I go this page it prints to pdf when is loading, I thought it would wait for a click but instead it performs the printing.

What is the problem? thanks in advance.

PD. I'm working with VS2005 and for the pdf creation I use iTextSharp.

Prints pdf when page loads

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我在我的aspx页面中有这段代码；<a href="javascript:void(0);" onclick=<% Print(); %> title="Print listings">Print</a>它提供了一个链接，用于在用户单击列表时将列表打印到pdf；正如您所注意到的，该脚本从后台代码调用一个函数。问题是，当...

问页面加载时打印pdf
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