how to Change border color active subitem in listviewdataitem?

Hello Khanh,

1. You can use the CellFormatting event for this. Here is how to style the current cell: 

private void RadListView1_CellFormatting(object sender, ListViewCellFormattingEventArgs e)
{
    var cell = e.CellElement as DetailListViewDataCellElement;

    if (cell != null && cell.Row.Current && cell.Data.Current)
    {
        e.CellElement.BorderColor = Color.Red;                 
    }
    else
    {
        e.CellElement.ResetValue(LightVisualElement.BorderColorProperty, ValueResetFlags.Local);
    }
}

Since the entire row is styled at once you can use the VisualItemFormatting to set the BackColor:

private void RadListView1_VisualItemFormatting(object sender, ListViewVisualItemEventArgs e)
{
    e.VisualItem.DrawFill = false;
}

I hope this helps. Should you have any other questions, do not hesitate to ask.

Regards,
Dimitar
Progress Telerik

Hi, after checking again i made a mistake, i corrected my code and now your code worked for the first question.
with the second question: I have 1 button and button_click event
I want after clicking the button, the itemselected in listview is no longer highlighted so in the button_click code event I want to add a line at the last of procedule like:
sub button_click (...)
'my code
'.....
e.VisualItem.DrawFill = false '<<<<----- 
end sub
I want the effects to return to the same form when the form started

Thanks.

Hello Khanh,

You cannot access the visual elements outside of the event handler. You can clear the selection which should have the desired effect: 

private void radButton1_Click(object sender, EventArgs e)
{
    
    radListView1.CurrentItem = null;
    radListView1.CurrentColumn = null;
    radListView1.SelectedItem = null;
}

I hope this helps. Should you have any other questions, do not hesitate to ask.

Regards,
Dimitar
Progress Telerik

Hi Dimitar.
I tested it, worked perfectly: D, so I was able to finish my first vsto project with telerik. I am very happy with it.
Thank you as well as the other admin very much.

Have a nice weekend :)

Hello Khanh,

I am glad to hear that this works as expected and you have achieved your goals. 

Do not hesitate to contact us if you have other questions.

Regards,
Dimitar
Progress Telerik