This is a migrated thread and some comments may be shown as answers.

ListView -DetailView item removing

5 Answers 411 Views
ListView
This is a migrated thread and some comments may be shown as answers.
John Mark
Top achievements
Rank 1
John Mark asked on 10 Feb 2013, 03:39 PM
how to remove items from listview?
i tried this pieces of code but i got an exception
foreach (ListViewDataItem eachItem in radListView1.SelectedItems)
            {
                radListView1.Items.Remove(eachItem);
            } 

my exception is Collection was modified; enumeration operation may not execute.

5 Answers, 1 is accepted

Sort by
0
Stefan
Telerik team
answered on 13 Feb 2013, 01:56 PM
Hi John,

Thank you for writing.

When you delete an items it gets deleted from the SelectedItems collection as well, and this is why you get this exception. To safely delete them, you need to copy the items in a list and then iterate your list and delete them:
foreach (ListViewDataItem eachItem in radListView1.SelectedItems.ToList())
{
      radListView1.Items.Remove(eachItem);
}
 
//or
 
List<ListViewDataItem> saveSelectedItems = new List<ListViewDataItem>();
 
foreach (ListViewDataItem eachItem in radListView1.SelectedItems)
{
    saveSelectedItems.Add(eachItem);
}
 
foreach (ListViewDataItem item in saveSelectedItems)
{
    radListView1.Items.Remove(item);
}

I hope this helps.
 

Greetings,
Stefan
the Telerik team
Q3'12 SP1 of RadControls for WinForms is out now. See what's new.
0
Kamelia
Top achievements
Rank 1
answered on 16 Sep 2014, 02:12 PM
hi, I got this error too! :(
and I tried your solution
but again I got an error in foreach part :

cannot convert type 'Telerik.wincontrols.UI.RadListDataItem' to 'Telerik WwinControls.UI.ListviewDataItem'


pleeeeeaaaase help me 
thanks
0
Stefan
Telerik team
answered on 16 Sep 2014, 03:51 PM
Hello Kamelia,

I assume that you are using RadListControl or RadDropDownList, rather than RadListView, which this thread concerns. If so, in your foreach loop, you need to use RadListDataItem instead of ListViewDataItem, as the former is the type of the data items in RadListControl/RadDropDownList.

I hope this helps.

Regards,
Stefan
Telerik
 
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos and start improving your app based on facts, not hunches.
 
0
Kamelia
Top achievements
Rank 1
answered on 23 Sep 2014, 02:44 PM
thank you so much 

I have another question about RadGrieview


I want the color of any rows which was selected before ., changes 
in a way that by looking at my RadGridview , I can see the which of the rows has been selected ones before!
thank you in advance
0
Stefan
Telerik team
answered on 24 Sep 2014, 08:17 AM
Hi Kamelia,

This forum concerns RadListView, not RadGridView. I have answered your grid view question in the grid view forum: http://www.telerik.com/forums/change-selected-grid-view-row-color.

May I please ask you to avoid posting unrelated questions in other threads. If you cannot find a thread for the particular case you have, please open a new one. This way we can keep the forums clean and easy to navigate.

Thank you for the understanding.

Regards,
Stefan
Telerik
 
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos and start improving your app based on facts, not hunches.
 
Tags
ListView
Asked by
John Mark
Top achievements
Rank 1
Answers by
Stefan
Telerik team
Kamelia
Top achievements
Rank 1
Share this question
or