mr_medhat
Posts: 16
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| Posted: 07/11/2006, 11:38 AM |
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Dear Gentlemen ,
I want to refresh a form with an “onChange” event of a listbox , I want to preserve the value of another listbox ,, in ASP I used :
window.location.href = "Students_maint.aspx?yearID=" + this.value
+ “&Grade_ID=" + Students.Grade_ID.value ;
Please , What is the same code for VB.Net
PS.
The form name is Students
The 2 Listboxes are yearID and Grade_ID
Thanks in Advance
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mr_medhat
Posts: 16
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| Posted: 08/23/2006, 3:52 AM |
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Please ......... Any Reply !!
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Stan
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| Posted: 08/28/2006, 11:21 PM |
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This code should work for .NET. The only difference, that .NET use one html form per page. And control's name contain both form name and control name itself. So refernece to the second control will looks as Students_Grade_ID.value
Stan
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mr_medhat
Posts: 16
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| Posted: 08/29/2006, 1:18 AM |
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Dear Stan ,
I’ve tried all the possible naming references and still none of them refreshed the page , Note , I get a small error in the IE status bar “Error on Page”
I’ve tried :
Students_Grade_ID.value
Students_Grade_ID.value ;
StudentsGrade_ID.value
StudentsGrade_ID.value ;
Note : The page refreshes if it’s only one parameter given , meaning that this line alone works fine :
window.location.href = "Students_maint.aspx?yearID=" + this.value
Thanks for your Help
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Stan
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| Posted: 08/29/2006, 8:03 AM |
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The ID should look as Students_Grade_ID. You can view source of HTML page in browser and find it.
Also you can try the following syntax
document.getElementById("Students_Grade_ID").value
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mr_medhat
Posts: 16
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| Posted: 09/02/2006, 1:11 PM |
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No Stan , nothing made this work for me ,,,
Please , if you have the time , try to create a test page with 2 listboxes and find the onchange code (on the second listbox ) that refreshes the page with the 2 listboxes values as URL parameters .
I use VB.Net with .Net Framework ver. 2.
Thanks in advance.
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mr_medhat
Posts: 16
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| Posted: 09/23/2006, 4:00 PM |
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Can anyone please help me with this issue !!!
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Stan
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| Posted: 09/25/2006, 8:43 AM |
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I created a form with the same controls as in your example. The working code is looked as following:
window.location.href = "OnChangeTest.aspx?yearID=" + this.value + "&Grade_ID=" + document.getElementById("StudentsGrade_ID").value;
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mr_medhat
Posts: 16
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| Posted: 09/27/2006, 3:57 AM |
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Dear Stan ,
You are a life saver , It works beautifully 
I’m sure plenty of people will use your useful post for few months to come.
Thank you very much.
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