Need to open a new window with Javascript and pass query strings stored in a string variable in C#

Question

I may be going about this all wrong but I am trying to set up a normal HTML button on the client side, using javascript and Window.Open to determine the page url, size, position, etc.

What I would like to do is pass local variables from code-behind and some how attach the query string segment to the url within the Window.Open script dynamically. What I was thinking of doing is constructing the query string in the code behind and assign it to a string variable. I would the like to simply attached the variable from code-behind to the query string segment of the url, in the Window.Open script.

Something like this, although I this isn't working...

<input type="button" value="Printer Friendly Copy" onclick="window.open('Print.aspx?<%= MyString %>', '_blank', 'toolbar=no, scrollbars=yes, resizable=yes, top=500, left=500, width=400, height=400')" />

Could anyone tell me the proper way of doing this? I could navigate to a new page all together using Response.Redirect in code-behind but I would prefer to open a new window and so far, javascript seems to be the best way of doing this from my research.

Sam Fen · Accepted Answer · 2014-05-20 19:59:24Z

3

It's not entirely clear to me what you're asking, but if you simply want to open a new window with a url that contains parameters, that is certainly possible.

Note that you must open the new window only in response to a UI event, like a button click, or the browser will assume it's malicious and block it.

My question is what you are doing with

<%= MyString %>

is that a variable you want to fill in? If so, you should simply construct the url in Javascript.

var url = "Print.aspx?" + variables;
window.open(url, ...)

Here is a simple fiddle showing this: http://jsfiddle.net/LvB7Z/1/

answered May 20, 2014 at 19:59

Sam Fen

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Cody Hicks Over a year ago

That makes perfect sense. What I'm trying to to though is construct the parameters dynamically according to certain conditions in code-behind. I guess I'm trying to associate a C# variable with JavaScript, filling in the parameters with the C# variable values. I'm a bit flaky with it comes to JS though.

Zuzlx · Accepted Answer · 2014-05-20 19:57:47Z

2

Set your value in the code-behind into a hidden field with a unique name or class. On the client side, use javascript/jquery to find that hidden field and then use window.open passing it the query string key/value.

For example, var vals = $('#myHiddenField').val(); in jquery notation. or use getElementById in js.

HTH

answered May 20, 2014 at 19:57

Zuzlx

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3 Comments

Cody Hicks Over a year ago

I suppose I could create a hidden label on the page_load even with a per-determined parameters and pass the label text value with JS.

Cody Hicks Over a year ago

This got it. I'm able to first assign my parameter data to a hidden label and the read the label text with my JS function.

<script type="text/javascript">     function NewPrintWindow()     {         var QueryParameters = $('<%= hlReceiptData %>').val()         Window.Open("Print.aspx?" + QueryParameters, "_blank", "toolbar=no, scrollbars=yes, resizable=yes, top=500, left=500, width=400, height=400")}  </script>

Cody Hicks Over a year ago

In code behind, I assign the hidden label's text as.. ` string ReceiptData = "PatientFirstName=" + PatientFirstNameLabel.Text + "&" + "PatientLastName=" + PatientLastNameLabel.Text + "&"; hlReceiptData.Text = ReceiptData.ToString(); `

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