How to identify the ListBox is selected or not.

Posted by Vanchi050585 under ASP.NET on 7/13/2010 | Views : 2874 | Status : [Member] | Replies : 2

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hi all,

How to identify the ListBox is selected or not.

Thanks in Advance,
vanchi

Thanks
tvn

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Posted by: Raja on: 7/13/2010 [Member] Starter

0	There are many ways: 1. listbox.SelectedIndex = < 0 then not selected 2. listbox.SelectedValue = null then not selected Try to printout the value of SelectedIndex and SelectedValue when you have not selected the listbox and you will get them how to know if listbox is selected or not :) Thank you. Regards, Raja, USA Vanchi050585, if this helps please login to Mark As Answer. \| Alert Moderator

There are many ways:

1. listbox.SelectedIndex = < 0 then not selected
2. listbox.SelectedValue = null then not selected

Try to printout the value of SelectedIndex and SelectedValue when you have not selected the listbox and you will get them how to know if listbox is selected or not :)

Thank you.

Regards,
Raja, USA

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Posted by: Neeks on: 7/21/2010 [Member] Bronze

0	Hi, If you are using the VS2008 please try below code. create static function in static class public static class Extensions { public static bool IsSelected(this ListBox lst) { return lst.SelectedValue != null ? (lst.SelectedValue > 0) : false; } } Calling this function. if(lst.IsSelected()) { MessageBox.Show("ListBOx is Selected"); } Vanchi050585, if this helps please login to Mark As Answer. \| Alert Moderator

Hi,
If you are using the VS2008 please try below code.

create static function in static class

public static class Extensions

{

           public static bool IsSelected(this ListBox lst)

           {

                    return lst.SelectedValue != null ? (lst.SelectedValue > 0) : false;

           }

}

Calling this function.

if(lst.IsSelected())

{

            MessageBox.Show("ListBOx is Selected");

}

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