我想要在图像控件中显示.cur文件路径("%SystemRoot%\cursors\aero_arrow.cur"
)。所以我需要将Cursor转换为ImageSource。我尝试了CursorConverter和ImageSourceConverter,但没有运气。我也尝试从光标创建图形,然后将其转换为Bitmap,但这也无效。然后我在这个帖子中找到了接受的答案:http://social.msdn.microsoft.com/Forums/vstudio/en-US/87ee395c-9134-4196-bcd8-3d8e8791ff27/is-there-any-way-convert-cursor-to-icon
现在有趣的是,我无法创建System.Windows.Form.Cursor的新实例,既没有文件路径也没有流,因为它抛出以下异常:
System.Runtime.InteropServices.COMException(0x800A01E1):异常 来自HRESULT:0x800A01E1(CTL_E_INVALIDPICTURE)at System.Windows.Forms.UnsafeNativeMethods.IPersistStream.Load(的IStream pstm)在System.Windows.Forms.Cursor.LoadPicture(IStream stream)
那么有人能告诉我将System.Windows.Input.Cursor
转换为ImageSource
的最佳方式吗?
那个.ani游标怎么样?如果我没记错,System.Windows.Input.Cursor不支持动画游标,那么如何向用户显示呢?然后使用3d party gif库将它们转换为gif?
答案 0 :(得分:2)
我在这个帖子中找到了解决方案:How to Render a Transparent Cursor to Bitmap preserving alpha channel?
所以这是代码:
[StructLayout(LayoutKind.Sequential)]
private struct ICONINFO
{
public bool fIcon;
public int xHotspot;
public int yHotspot;
public IntPtr hbmMask;
public IntPtr hbmColor;
}
[DllImport("user32")]
private static extern bool GetIconInfo(IntPtr hIcon, out ICONINFO pIconInfo);
[DllImport("user32.dll")]
private static extern IntPtr LoadCursorFromFile(string lpFileName);
[DllImport("gdi32.dll", SetLastError = true)]
private static extern bool DeleteObject(IntPtr hObject);
private Bitmap BitmapFromCursor(Cursor cur)
{
ICONINFO ii;
GetIconInfo(cur.Handle, out ii);
Bitmap bmp = Bitmap.FromHbitmap(ii.hbmColor);
DeleteObject(ii.hbmColor);
DeleteObject(ii.hbmMask);
BitmapData bmData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, bmp.PixelFormat);
Bitmap dstBitmap = new Bitmap(bmData.Width, bmData.Height, bmData.Stride, PixelFormat.Format32bppArgb, bmData.Scan0);
bmp.UnlockBits(bmData);
return new Bitmap(dstBitmap);
}
private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
//Using LoadCursorFromFile from user32.dll, get a handle to the icon
IntPtr hCursor = LoadCursorFromFile("C:\\Windows\\Cursors\\Windows Aero\\aero_busy.ani");
//Create a Cursor object from that handle
Cursor cursor = new Cursor(hCursor);
//Convert that cursor into a bitmap
using (Bitmap cursorBitmap = BitmapFromCursor(cursor))
{
//Draw that cursor bitmap directly to the form canvas
e.Graphics.DrawImage(cursorBitmap, 50, 50);
}
}
它是为Win Forms编写的,并绘制了一个图像。但是也可以在wpf中使用,并引用System.Windows.Forms。然后你可以将该位图转换为位图源并在图像控件中显示...
我使用System.Windows.Forms.Cursor而不是System.Windows.Input.Cursor的原因是我无法使用IntPtr句柄创建一个新的游标实例...
编辑:上述方法不适用于颜色位较低的游标。
另一种方法是改为使用Icon.ExtractAssociatedIcon
:
System.Drawing.Icon i = System.Drawing.Icon.ExtractAssociatedIcon(@"C:\Windows\Cursors\arrow_rl.cur");
System.Drawing.Bitmap b = i.ToBitmap();
希望有人帮助......