Mouse Operation

b b

Hi everyone, I have the following codes for mouse scrolling over data inside a ListView item. Here I am using ListView "listView1" in the form. The codes are working fine. But I want to make this code inside a class file so that for various ListView i can use the same code. I just want to pass the different different ListView name as a parameter to this function. I tried but its throwing errors. Can anyone help me on this. private void listView1_MouseWheel(object sender, MouseEventArgs e) { try { if (e.Delta <= 0) { index = listView1.SelectedIndices[0]; if (index <= listView1.Items.Count - 1) { i++; listView1.Items[i].Selected = true; listView1.Select(); } else { listView1.Items[listView1.Items.Count- 1].Selected=true; listView1.Select(); } } else if (e.Delta >= 0) { if (listView1.SelectedIndices[0] == 0) { listView1.Items[0].Selected = true; } else { i--; listView1.Items[i].Selected = true; listView1.Select(); } } } catch { } } regards, bjb

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b b17y ago
Hi Roie Bar, I tried your code, but below line showing error. OnMouseWheel(MouseEventArgs e) If i use OnMouseWheel(object sender, MouseEventArgs e), instead of this, then how i have to call the method as i want to pass ListView name as a parameter. Can you please help. regards, bjb
0
Master Billa17y ago
HI

Here is sample code to do this given in MSDN

http://msdn.microsoft.com/en-us/library/system.windows.forms.listview_events%28VS.71%29.aspx

Thank you
0

Roei Bar17y ago

here you go :

 
public class ListViewExtender : ListView
{
    public ListView WorkingListView;
    public int index;
    protected override void OnMouseWheel(MouseEventArgs e)
    {
        base.OnMouseWheel(e);

        try
        {
            if (e.Delta <= 0)
            { index = WorkingListView.SelectedIndices[0]; if (index <= WorkingListView.Items.Count - 1) { i++; WorkingListView.Items[i].Selected = true; WorkingListView.Select(); } else { WorkingListView.Items[WorkingListView.Items.Count - 1].Selected = true; WorkingListView.Select(); } }
            else if (e.Delta >= 0) { if (WorkingListView.SelectedIndices[0] == 0) { WorkingListView.Items[0].Selected = true; } else { i--; WorkingListView.Items[i].Selected = true; WorkingListView.Select(); } }
        }
        catch { }
    }
}