public void SetSortIcon(int columnIndex, SortOrder order)
{
IntPtr columnHeader = this.HeaderHandle;
for (int columnNumber = 0; columnNumber <= this.Columns.Count - 1; columnNumber++)
{
// Get current listview column info
var lvcol = new NativeMethods.LVCOLUMN(NativeMethods.ListViewColumMask.Fmt);
NativeMethods.SendMessage(this.Handle, NativeMethods.ListViewMessage.GetColumn, columnNumber, lvcol);
// Get current header info
var hditem = new NativeMethods.HDITEM(NativeMethods.HeaderItemMask.Format | NativeMethods.HeaderItemMask.DISetItem);
NativeMethods.SendMessage(columnHeader, NativeMethods.HeaderMessage.GetItem, columnNumber, hditem);
// Update header with column info
hditem.Format |= (NativeMethods.HeaderItemFormat)((uint)lvcol.Format & 0x1001803);
if ((lvcol.Format & NativeMethods.ListViewColumnFormat.NoTitle) == 0)
{
hditem.ShowText = true;
}
// Set header image info
if (!(order == SortOrder.None) && columnNumber == columnIndex)
{
hditem.ImageDisplay = (order == System.Windows.Forms.SortOrder.Descending) ? NativeMethods.HeaderItemImageDisplay.DownArrow : NativeMethods.HeaderItemImageDisplay.UpArrow;
}
else
{
hditem.ImageDisplay = NativeMethods.HeaderItemImageDisplay.None;
}
// Update header
NativeMethods.SendMessage(columnHeader, NativeMethods.HeaderMessage.SetItem, columnNumber, hditem);
}
}
public static void SetColumnDropDown(this ListView listView, int columnIndex, bool enable)
{
if (columnIndex < 0 || (columnIndex >= 0 && listView.Columns == null) || columnIndex >= listView.Columns.Count)
{
throw new ArgumentOutOfRangeException(nameof(columnIndex));
}
if (listView.IsHandleCreated)
{
var lvc = new NativeMethods.LVCOLUMN(NativeMethods.ListViewColumMask.Fmt);
NativeMethods.SendMessage(listView.Handle, NativeMethods.ListViewMessage.GetColumn, columnIndex, lvc);
if (enable)
{
lvc.Format |= NativeMethods.ListViewColumnFormat.SplitButton;
}
else
{
lvc.Format &= ~NativeMethods.ListViewColumnFormat.SplitButton;
}
NativeMethods.SendMessage(listView.Handle, NativeMethods.ListViewMessage.SetColumn, columnIndex, lvc);
listView.InvalidateHeader();
}
}
/// <include file='doc\ListView.uex' path='docs/doc[@for="ListView.SetColumnInfo"]/*' />
/// <devdoc>
/// </devdoc>
/// <internalonly/>
internal void SetColumnInfo(int mask, ColumnHeader ch) {
if (IsHandleCreated) {
Debug.Assert((mask & ~(NativeMethods.LVCF_FMT | NativeMethods.LVCF_TEXT | NativeMethods.LVCF_IMAGE)) == 0, "Unsupported mask in setColumnInfo");
NativeMethods.LVCOLUMN lvColumn = new NativeMethods.LVCOLUMN();
lvColumn.mask = mask;
if ((mask & NativeMethods.LVCF_IMAGE) != 0 || (mask & NativeMethods.LVCF_FMT) != 0) {
// When we set the ImageIndex we also have to alter the column format.
// This means that we have to include the TextAlign into the column format.
lvColumn.mask |= NativeMethods.LVCF_FMT;
if (ch.ActualImageIndex_Internal > -1) {
// you would think that setting iImage would be enough.
// actually we also have to set the format to include LVCFMT_IMAGE
lvColumn.iImage = ch.ActualImageIndex_Internal;
lvColumn.fmt |= NativeMethods.LVCFMT_IMAGE;
}
lvColumn.fmt |= (int) ch.TextAlign;
}
if ((mask & NativeMethods.LVCF_TEXT) != 0) {
lvColumn.pszText = Marshal.StringToHGlobalAuto(ch.Text);
}
int retval = (int)UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.LVM_SETCOLUMN, ch.Index, lvColumn);
if ((mask & NativeMethods.LVCF_TEXT) != 0) {
Marshal.FreeHGlobal(lvColumn.pszText);
}
if (0 == retval)
throw new InvalidOperationException(SR.GetString(SR.ListViewColumnInfoSet));
// vsw 383220: when running on AMD64 the list view does not invalidate the column header.
// So we do it ourselves.
InvalidateColumnHeaders();
}
}
public static extern IntPtr SendMessage(HandleRef hWnd, int msg, int wParam, NativeMethods.LVCOLUMN lParam);
