private void WmPaint(ref Message m)
{
if (base.DropDownStyle == ComboBoxStyle.Simple)
{
base.WndProc(ref m);
return;
}
else//if (base.DropDownStyle == ComboBoxStyle.DropDown)
{
if (!_bPainting)
{
PAINTSTRUCT ps =
new PAINTSTRUCT();
_bPainting = true;
WinMethod.BeginPaint(m.HWnd, ref ps);
RenderComboBox(ref m);
WinMethod.EndPaint(m.HWnd, ref ps);
_bPainting = false;
m.Result = KnownParam.TRUE;
}
else
{
base.WndProc(ref m);
}
}
//else
//{
// base.WndProc(ref m);
// RenderComboBox(ref m);
//}
}
private ComboBoxInfo GetComboBoxInfo()
{
ComboBoxInfo cbi = new ComboBoxInfo();
cbi.cbSize = Marshal.SizeOf(cbi);
WinMethod.GetComboBoxInfo(base.Handle, ref cbi);
return(cbi);
}
/// <summary>
/// 重绘文本款Border颜色
/// </summary>
/// <param name="m"></param>
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (((m.Msg == WinMsgs.WM_NCPAINT) || (m.Msg == WinMsgs.WM_ERASEBKGND)) ||
(m.Msg == WinMsgs.WM_PAINT))
{
IntPtr wParam = m.WParam;
IntPtr hdc = WinMethod.GetDCEx(m.HWnd, wParam, 0x21);
if (hdc != IntPtr.Zero)
{
Graphics graphics = Graphics.FromHdc(hdc);
Rectangle bounds = new Rectangle(0, 0, base.Width, base.Height);
ControlPaint.DrawBorder(graphics, bounds, this._borderColor, ButtonBorderStyle.Solid);
m.Result = (IntPtr)1;
WinMethod.ReleaseDC(m.HWnd, hdc);
}
}
}