[b]Force Text.TextChanged Event. How?[/b]

[mjjks]

Quick foreword.
I have a textbox web forms control and an image.
On image click, I open popup window, load grid with data and return selected value into textbox using JavaScript.

I need to be able to fire TextChanged event when data is placed into textbox via JavaScript, so I can do further processing in that event in code behind.
Right now this event fires only if I type something in textbox and tab.


Thanks much for your help

Steve

 

[jbenson001]

When you come back to the page, I belive a post back happens. So, what I would do is store the value (on the first page) into a session var. Then when you come back, check the value against the session var, and if it is different fire the event.

As for fireing the event, you can call the event directly but it is cumbersome and proabaly not the best way in .NET. In other languages you can do it simply, but with .NET it is a pain. So, what you can do is put the code in the Text Changed event into a sub. Then from the TextChanged event call that sub. Also, when you check the session var in the Page_Load, fire the event if the values are not =.


Jim

 

[mjjks]

Thanks Jim. I'll give it a try.

 

[jbenson001]

OK.. let me know how it goes and if I can help any further...


Jim

 

[mjjks]

I tried but postback is not happening as I populate parent forms control via javascript using opener.document.myformname.mycontrol.value='12345'

I'll need somehow to force LoadPage event from JavaScript and in Loadpage event, compare values and then call textChanged.

I'm just started with ASP.Net, so don't really know if it's possible to do using Javascriipt.

I was thinking to place a value into parent control and then submit form using javascript. That should force parent page reload.

 

[jbenson001]

Too much JavaScript for me... LOL

How are you returning to the main page?

Jim

 

[mjjks]

Jim,
I simply populate main page's textbox from popup and close popup.

Javascript popup wasn't my choice but I don't have much space on form for lookups and user needs to stay on the same page pretty much all the time.

It's more like a windows form functionality duplication

Thanks

Steve

 

[jbenson001]

when you come back to the main page.. the page_load isn't firing?

 

[mjjks]

nope, it's not

 

[jbenson001]

humm I thought it would.. it does when i have done it in the past.. what is the code you use to close the pop up and send back to the main page?

 

[mjjks]

<script language="JavaScript" type="text/javascript">
   function passValBack(x)
    {
     opener.document.header.txtOrderNo.value= x;
     opener.document.header.txtOrderNo.focus();
     close();
    }
</script>

 

[jbenson001]

Yes you are right.. the Page_Load does not fire. Maybe in your code you can call opener.document.forms[0].submit before you close the window.


Jim

 

[mjjks]

Thanks Jim for you suggestions but I abandoned that approach.

I created a hidden layer and placed grid on it and show/hide it using javascript in image button.

I thought that would do the trick and it does in a way.
Problem is that image button submits form, page reloads and I see layer with grid for a second as initially layer is hidden.

Is there a way to prevent button from posting form?
Image button doesn't have AutoPostback property.

I'll probably post this as separate question.

Thanks everyone

 

[jbenson001]

Any type of server button automatically causes a postback and there is no way to turn it off.