The native ListView (i.e. the Win32 one) supports sub item images so it
should be pretty simple to add that support by inheriting ListView and doing
some P/Invoke stuff. Check out the LVS_EX_SUBITEMIMAGES style. Once you have
the images in place you just need to track the check state. The following
class has support for sub item images:
using System;
using System.Runtime.InteropServices;
public class ListViewEx : System.Windows.Forms.ListView
{
private const int LVIF_IMAGE = 0x2;
private const int LVS_EX_SUBITEMIMAGES = 0x2;
private const int LVM_FIRST = 0x1000;
private const int LVM_GETITEMA = LVM_FIRST + 5;
private const int LVM_GETITEMW = LVM_FIRST + 75;
private static readonly int LVM_GETITEM = (Marshal.SystemDefaultCharSize
== 1) ? LVM_GETITEMA : LVM_GETITEMW;
private const int LVM_SETITEMA = LVM_FIRST + 6;
private const int LVM_SETITEMW = LVM_FIRST + 76;
private static readonly int LVM_SETITEM = (Marshal.SystemDefaultCharSize
== 1) ? LVM_SETITEMA : LVM_SETITEMW;
private const int LVM_SETEXTENDEDLISTVIEWSTYLE = LVM_FIRST + 54;
[DllImport("User32.dll", CharSet = CharSet.Auto)]
private static extern int SendMessage(IntPtr hwnd, int msg, IntPtr
wParam, ref LVITEM lParam);
[DllImport("User32.dll", CharSet=CharSet.Auto)]
private static extern int SendMessage(IntPtr hwnd, int msg, IntPtr
wParam, IntPtr lParam);
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
private struct LVITEM
{
public int mask;
public int iItem;
public int subItem;
public int state;
public int stateMask ;
[MarshalAs(UnmanagedType.LPTStr)]
public string lpszText;
public int cchTextMax;
public int iImage;
public IntPtr lParam;
public int iIndent;
}
private bool ListView_SetItem(IntPtr hwnd, ref LVITEM lvi)
{
int result = SendMessage(hwnd, LVM_SETITEM, IntPtr.Zero, ref lvi);
return (result == 0) ? false : true;
}
private bool ListView_GetItem(IntPtr hwnd, ref LVITEM lvi)
{
int result = SendMessage(hwnd, LVM_GETITEM, IntPtr.Zero, ref lvi);
return (result == 0) ? false : true;
}
private void ListView_SetExtendedListViewStyleEx(IntPtr hwnd, int mask,
int style)
{
SendMessage(hwnd, LVM_SETEXTENDEDLISTVIEWSTYLE, new IntPtr(mask),
new IntPtr(style));
}
private void ListView_SetSubItemImageIndex(IntPtr hwnd, int index, int
subItemIndex, int imageIndex)
{
LVITEM lvi = new LVITEM();
lvi.iItem = index;
lvi.subItem = subItemIndex;
lvi.iImage = imageIndex;
lvi.mask = LVIF_IMAGE;
ListView_SetItem(hwnd, ref lvi);
}
private int ListView_GetSubItemImageIndex(IntPtr hwnd, int index, int
subItemIndex)
{
LVITEM lvi = new LVITEM();
lvi.iItem = index;
lvi.subItem = subItemIndex;
lvi.mask = LVIF_IMAGE;
if (ListView_GetItem(hwnd, ref lvi))
return lvi.iImage;
else
return -1;
}
protected override void OnCreateControl()
{
base.OnCreateControl();
ListView_SetExtendedListViewStyleEx(this.Handle,
LVS_EX_SUBITEMIMAGES, LVS_EX_SUBITEMIMAGES);
}
public void SetSubItemImageIndex(int index, int subItemIndex, int
imageIndex)
{
ListView_SetSubItemImageIndex(this.Handle, index, subItemIndex,
imageIndex);
}
public int GetSubItemImageIndex(int index, int subItemIndex)
{
return ListView_GetSubItemImageIndex(this.Handle, index,
subItemIndex);
}
}
/claes
Steve said:
Hi all,
I don't want to use the datagrid if I don't have to. Is there a way to
setup a ListBox to have more than one checkbox column?
I need something like this
| Include || Set as Default || Other columns... |
[X] [ ] asdasdasd
[X] [X] digity-digity!
Quick scan on CodeProject came up with a not-so-pretty MFC control, but
obviously... I would like a c# one.
Thanks for any tips!
