CODEWITHSUNDEEP
c#winforms
Daniel Eugen
Daniel Eugen

Reputation: 2780

Changing ListView Header and Grid Lines colors

Well i have a windows forms application in which i add a couple of listViews in order to hold some data for the user and it looks like this

enter image description here

As you see my form backcolor is black so the list view's grid lines and header white color makes an annoying contrast so after an hour searching without a luck i decided to ask here.

[Question] : How could i edit the colors of the Header & Grid Lines of the list view to match my needs ?

Upvotes: 8

Views: 16110

Answers (2)

B.K.
B.K.

Reputation: 10152

You can perform that in a DataGrid, but I don't think there's an easy way for ListView, since there are no properties for those lines, unlike DataGrid.

<Style TargetType="{x:Type DataGrid}">
    <Setter Property="HorizontalGridLinesBrush" Value="Red"/>
    <Setter Property="VerticalGridLinesBrush" Value="Green"/>
</Style>

Put it into application resources or window resources.

Other than that, there's a way to change the border color of each ListViewItem:

<Style TargetType="{x:Type ListViewItem}">
    <Setter Property="BorderBrush" Value="Red"/>
</Style>

Upvotes: -1

King King
King King

Reputation: 63317

It looks like that there is not anyone who's interested in customizing a ListView to support Grid Line Color. I've tried this one and want to share here. It's not really good by a little flicker (not really much) when you scroll the ListView items. However it's acceptable. I think I lack some knowledge of win32 here to make it more perfect:

public class CustomListView : ListView {
        bool scrollDown;
        int lastScroll;
        public Color GridLinesColor {get;set;}
        [DllImport("user32")]
        private static extern int GetScrollPos(IntPtr hwnd, int nBar);
        public CustomListView(){
           GridLinesColor = Color.Red;
           DoubleBuffered = true;
           base.GridLines = false;//We should prevent the default drawing of gridlines.
        }
        public new bool GridLines {get;set;}
        protected override void WndProc(ref Message m)
        {                
            if (m.Msg == 0x20a){//WM_MOUSEWHEEL = 0x20a
                scrollDown = (m.WParam.ToInt64() >> 16) < 0;
            }
            if (m.Msg == 0x115){//WM_VSCROLL = 0x115
                int n = (m.WParam.ToInt32() >> 16);
                scrollDown = n > lastScroll;
                lastScroll = n;
            }                
            base.WndProc(ref m);
            if (m.Msg == 0xf && GridLines && Items.Count > 0&&View==View.Details)//WM_PAINT = 0xf
            {                    
                using (Graphics g = CreateGraphics())
                {
                    using(Pen p = new Pen(GridLinesColor)){
                      int w = -GetScrollPos(Handle, 0);
                      for (int i = 0; i < Columns.Count; i++)
                      {
                        w += Columns[i].Width;
                        g.DrawLine(p, new Point(w, 0), new Point(w, ClientSize.Height));
                      }
                      int a = Items[0].Bounds.Bottom - 1;
                      int b = Height - Items[0].Bounds.Y;
                      int c = Items[0].Bounds.Height;
                      for (int i = scrollDown ? a + (b/c) * c : a ; scrollDown ? i >= a : i < b ; i += scrollDown ? -c : c)
                      {
                        g.DrawLine(p, new Point(0, i), new Point(ClientSize.Width, i));
                      }                                      
                    }          
                }                 
            }

        }
}

UPDATE: Thanks to suggestion of Cody Gray, I added code to handle horizontal scrolling. I use GetScrollPos for simplicity because as recommended by MSDN documentation page, we should use GetScrollInfo instead.

enter image description here

Upvotes: 13

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