trigger postback from popup window

[Beffmans]

Hi

I want to trigger a postback in my parent page from my popup window
which i opened with javascript. How to go about this?

ch Beffer

 

[Teemu Keiski]

Hi,

maybe my blog post helps you

ASP.NET: How to create a postback on a main page from a popup window
http://blogs.aspadvice.com/joteke/archive/2005/06/15/4063.aspx

 

[Jimmy]

thanks but when i run it i get:

Compiler Error Message: CS0103: The name 'btnPostBack' does not exist in the
class or namespace 'ASP.WebForm1_aspx'

ch B.

 

[Teemu Keiski]

It's tested.

See the second line in my example, you do have a server-side Button which
has ID btnPostBack? Note that you can rename them freely as long IDs etc are
reflected where they are used.

 

[Jimmy]

i am trying:
Response.Write("<script>javascript:__doPostBack('','');</script>");

to force a postback on the parent page but it does not work??

 

[Jimmy]

i get an error after clicking the popupbutton :
'Object expected' line 9 char 2
that is on the line with :
<%=Page.GetPostBackEventReference(btnPostBack)%>

ch B

 

[Teemu Keiski]

Follow my example exactly as it is from line to line, so that you can see
how it works. After that, apply it for your scenario.

You cannot use Response.Write to write the __doPostBack call.

 

[Teemu Keiski]

And FYI: I uploaded the sample pages so that they can be downloaded:

http://www.elisanet.fi/teemu.keiski/popupsample.zip

Just place them on your app directory and test it out.

 

[Jimmy]

thanks very much!

 

[Jimmy]

FYI what also works instead of :

<%=Page.GetPostBackEventReference(btnPostBack)%>

is:

__doPostBack('btnPostBack', '');

ch B.

 

[Teemu Keiski]

There's a good reason for it.

Yes, if some other control like LinkButton forces you to have __doPostBack
function declared on the Page, such snippet would be enough. But, by default
its not there if no control requires it. For example LinkButton calls to
Page.GetXXX methodsa to ensure that __doPostBack script is registered.

Page.GetPostBackEventReference ensures that __doPostback declaration is on
the Page as it registers it to be outputted. Better play explicitly.