ASP.NET: How to pass window.ReturnValue to C# code?

Question

I use showModalDialog function to open popup window, which is ASP.NET page. After I pickup some option in drop down list, I populate window.ReturnValue and press OK button. The modal popup window closes, but I don't know how to pass return value to C# code behind to proceed further.

Here's the code:

Open popup window:

function ClientItemClicked(sender, eventArgs)
{
    if (eventArgs.get_item().get_value() == "excel")
    {
        var retVal = window.showModalDialog("ExportToExcelChoice.aspx", null, "dialogWidth: 400; dialogHeight: 200; center: yes; resizable: no;");
    }
}

Close popup window:

function ReturnValue() {
    var choice = document.getElementById("DropDownList1").value;
    if ((window.opener != null) && (!window.opener.closed)) {
        window.ReturnValue = choice;
        var result = window.ReturnValue;
    }
    window.close();
}

I use Firefox.

I've tried it but I don't know how to access hidden field because hidden field is placed inside user control, and user control is inside placeholder, and placeholder is inside content page, and content page is inside master page. I open modal window from inside user control. Do you know how to do that? — tesicg
– tesicg, Commented Feb 15, 2013 at 7:01

marc_s · Accepted Answer · 2016-05-04 21:13:24Z

1

Create server side hidden input and assign the return value to it.

With jQuery:

$("#<%=serverhidden.ClientID%>").val(retVal)

or javascript:

document.getElementById("<%=serverhidden.ClientID%>").value = retVal

Now on postback you can access the value from the hidden input on server side.

edited May 4, 2016 at 21:13

marc_s

760k186 gold badges1.4k silver badges1.5k bronze badges

answered Feb 15, 2013 at 6:51

Rab Khan

35.7k4 gold badges52 silver badges66 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

tesicg Over a year ago

Yes. I've already tried it, but it doesn't work. Please, take a look at my answer below with the code I use.

tesicg Over a year ago

This is fourth day how I'm coming here to find the answer, but nobody can help so far.

tesicg Over a year ago

The hidden field looks as following: <input type="hidden" name="ctl00$ContentPlaceHolder1$ctl00$HiddenField2" id="ctl00_ContentPlaceHolder1_ctl00_HiddenField2" value="0" />

tesicg Over a year ago

I can use this to make it work: window.opener.document.getElementById("ctl00_ContentPlaceHolder1_ctl00_HiddenField2").value = choice; But, it's not correct way.

Collectives™ on Stack Overflow

ASP.NET: How to pass window.ReturnValue to C# code?

1 Answer 1

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related