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Calling javascript function from C# codebehind

Posted on 2007-10-18
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Last Modified: 2012-05-05
So I've got an aspx page with a webgrid control on it and a submit button.
On submit I need this page to write values from the webgrid back to another page, it's opener, and the opener provides a javascript interface I can call to write values back.
However the webgrid being a webgrid I need to process the values from it in the codebehind before I can do anything with them (or do I?).

Ideally what I want to do is go through each cell in the webgrid individually in the codebehind, process the value of the cell and then pass it to a javascript function so I can write it back to the opener.

Alternatively I could probably make do with processing all the cell values and passing them as an array to a javascript function but I'm still not entirely sure how to do this.

I don't think RegisterStartupScript is any use to me so I'm interested in any other suggestions.

Thanks.
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Question by:capsoftuk
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divinewind80 earned 1500 total points
ID: 20100685
I use a technique of a blank linkbutton (with no text value) and a hiddenfield to move values from the code-behind to Javascript.  You can reference these in Javascript and C#.  I would have to see some code to suggest a specifc technique, though.  Can you show it?

To be specific, so you understand, I use the hiddenfield's value to determine if the linkbutton should be clicked (using a timed Javascript function).  

For example, you could click your submit button, run through your grid's data and set one hiddenfield as a URL variable, or whatever you need.  Then using a timed Javascript function, check to see if that hiddenfield has any value... if it does, the trigger the linkbutton click which would open your new page.  

Does that help?
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Author Comment

by:capsoftuk
ID: 20101366
Hello,

I actually managed to get it working myself.
I'd had it in my head that I wanted to run the javascript commands separately for each cell but I had a change of heart & just produced a chunk of javascript with all the commands during the preprocessing & then registered it as a startup script.
It does the job, it's not pretty and I'd rather not have to use javascript at all but what can you do.

But have the points anyway because I may end up changing the setup I've used and going with yours at some point.

Thanks,
C
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