FAQ - Frequently Asked Questions

Re: Can you open a new window from a post back?

dhinakaranpc — Thu, 13 Aug 2009 07:23:19 GMT

When we use update panel in the page the response.write wont support, where the other will support. This could be a one of the reason.

Re: Can you open a new window from a post back?

nitindhiman — Tue, 11 Aug 2009 11:43:02 GMT

Hi PLBlum,

I rarely need such kind of functionality but it is a gud topic, I agree with you that on each n every request the browser gets a new HTML based on the request made by that because HTTP is a stateless protocol n can not mentain the state.

And as you are saying that we can use registerClientstartUpScript to regester a script while page is loading, I hv 2 question for you, can't we perform the same functionality on onLoad event of the window, Like:

window.onload = function()

{

alert('hello');

}

and 2nd 1 is wt is the difference between registerclientstartUpScript and Response.Write.

Thnx...

Re: Can you open a new window from a post back?

dhinakaranpc — Tue, 11 Aug 2009 05:24:51 GMT

We can call the javascript function in the body tag which is called every time when the page loads.

function OpenPopupWindow()
{

window.open('../HelpDocs/AdmStudCenterwiseRpt.html','HelpDoc','width=600,resizable=yes,scrollbars = yes');

}

</script>
</head>

<body onload="OpenPopupWindow()">

</body>
</html>

Re: Can you open a new window from a post back?

Trelane- — Sat, 13 Jun 2009 12:48:09 GMT

Top Marks, absolutly perfectly correct:

this.myimagebutton.Attributes.Add("onClick", "this.form.target='_blank'"); //opens new window from image button and casues postback

(C# equivilent)

Re: Can you open a new window from a post back?

tirumal — Thu, 07 Aug 2008 14:30:43 GMT

To open a window from Parent window and to close a child window(Pagetobeopend.html), you can use following code

<body onload="javascript: window.open('pagetobeopened.html','','');window.opener=''; window.close();">
<a href="javascript: window.open("pagetobeopened.html");window.opener=''; window.close();">Close Main Window without Confirmation</a>

Re: Can you open a new window from a post back?

CHolt — Fri, 27 Jun 2008 15:08:34 GMT

The only problem with using window.open in a startup script is that it will be blocked by a popup blocker

Re: Can you open a new window from a post back?

kathirvelmm — Sat, 21 Jun 2008 10:24:18 GMT

1    <%@ Page Language="C#" AutoEventWireup="true"  CodeFile="FtpUpload.aspx.cs" Inherits="_Default" %>
2    
3    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
4    
5    <html xmlns="http://www.w3.org/1999/xhtml" >
6    <head runat="server">
7        <title>Untitled Page</title>
8        <script type="text/javascript" language="javascript">
9        window.close=tt();
10       function tt()
11       {
12           window.open(href="http://192.168.16.30/swlc" ,height="200", width="200");
13           }
14       </script>
15   </head>
16   <body bgcolor="linen">
17       <form id="form1" runat="server">
18   </form>
19   </body>
20   </html>
21

This has been tested and works.

Re: Can you open a new window from a post back?

aiasso — Mon, 09 Jun 2008 18:43:05 GMT

I found a way to do this using JavaScript. I've tested it with the ImageButton control using ASP.NET 2.0.

The approach is to add an onClick attribute to the tag that changes the form's target to the new target:

MyImageButton.Attributes.Add("onClick","this.form.target='" & Target & "'")

where Target is the target you want (eg. "_self","_top","PrintPreview", etc.)

I would think this would also work for Hyperlinks, etc. as well, though I haven't tested it.
Note the concatenation above uses ' quotes around the target name. The output in HTML would look like:

Re: Can you open a new window from a post back?

PLBlum — Fri, 06 Feb 2004 18:22:00 GMT

The article makes sense although it opens a window based on a click after the page reloads, not immediately on post back.

Re: Can you open a new window from a post back?

ariya — Wed, 04 Feb 2004 10:11:13 GMT

hi all ,

you can do it, just read this and you have done it !

http://dotnetjohn.com/articles/articleid88.aspx

ariya

Can you open a new window from a post back?

PLBlum — Wed, 31 Dec 2003 17:46:26 GMT

This question has been asked time and time again. When the server sends HTML to a browser, these two rules are followed:
1. The browser must have requested the page via an HTTP GET or POST. (The server cannot change a page without the browser asking for it.)
2. The browser will only retrieve the HTML into the window that requested it.

There are only two ways to open a new window that I know about:
1. The <a> tag includes a target= property specifying a new window. (The HyperLink webcontrol is simply a way to generate the <a> tag. It includes a Target property.)
2. Use JavaScript such as a window.open or window.createPopup.

The <a> tag opens the new window before posting back and requests the new HTML from that new window.

The JavaScript technique requires that the original page already contains the JavaScript or when the server posts back, the browser is sent new HTML containing the new JavaScript to the original window. That means the original page's contents are replaced.

If you want to use the JavaScript technique to open a new window on post back:
1. Prepare the HTML necessary for the original page to draw.
2. Use Page.RegisterStartupScript() to call window.open. This will allow the new window to popup as the original window is loaded.