C#中若何應用Winform完成炫酷的通明動畫界面。本站提示廣大學習愛好者：（C#中若何應用Winform完成炫酷的通明動畫界面）文章只能為提供參考，不一定能成為您想要的結果。以下是C#中若何應用Winform完成炫酷的通明動畫界面正文
做過.NET Winform窗體丑化的人應當都很熟習UpdateLayeredWindow吧，UpdateLayeredWindow可以完成窗體的隨意率性通明，後果很好，不會有毛邊。不外應用這個API以後，會有一個成績就是沒法應用通俗控件，並且沒有Paint新聞。為懂得決這個成績，有兩種辦法。
1、應用雙層窗體，底層窗體應用UpdateLayeredWindow作為配景，下層窗體用通俗窗體，而且可使用TransparencyKey或許Region來完成去除不須要的窗體內容，讓下層窗體能看究竟層的窗體。
2、直接單層窗體，應用控件的DrawToBitmap把控件圖象繪制到UpdateLayeredWindow 的窗體上，如許便可以看到通俗控件了。不外這個也有成績：1.控件內容不克不及主動更新 2.效力低，許多控件應用DrawToBitmap繪制出的圖象不完全，乃至繪制不出圖象。好比TextBox沒法顯示光標，WebBrowser沒法 顯示內容。
3、采取DirectUI技巧，重寫一切基本控件。後果最好，不外任務量偉大。
應用UpdateLayeredWindow時，普通是須要對Bitmap緩存起來，經由過程設置剪輯區域，部分重繪來進步效力。別的還可以異步重繪，模仿Winform的掉效到重繪。
有些人會說為何不直接用WPF啊，Wpf和Winform各有優缺陷，順應分歧的場所。Winform絕對於應用更簡略一些，體系請求更低。固然須要看人的習氣了和善於的。
UpdateLayeredWindow 根本應用辦法：
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base .CreateParams;
cp.ExStyle |= 0x00080000 ; // WS_EX_LAYERED 擴大款式
return cp;
}
}
重寫窗體的 CreateParams 屬性
API挪用：
public void SetBitmap(Bitmap bitmap, byte opacity)
{
if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
throw new ApplicationException( "位圖必需是32位包括alpha 通道" );
IntPtr screenDc = Win32.GetDC(IntPtr.Zero);
IntPtr memDc = Win32.CreateCompatibleDC(screenDc);
IntPtr hBitmap = IntPtr.Zero;
IntPtr oldBitmap = IntPtr.Zero;
try
{
hBitmap = bitmap.GetHbitmap(Color.FromArgb( 0 )); // 創立GDI位圖句柄，效力較低
oldBitmap = Win32.SelectObject(memDc, hBitmap);
Win32.Size size = new Win32.Size(bitmap.Width, bitmap.Height);
Win32.Point pointSource = new Win32.Point( 0 , 0 );
Win32.Point topPos = new Win32.Point(Left, Top);
Win32.BLENDFUNCTION blend = new Win32.BLENDFUNCTION();
blend.BlendOp = Win32.AC_SRC_OVER;
blend.BlendFlags = 0 ;
blend.SourceConstantAlpha = opacity;
blend.AlphaFormat = Win32.AC_SRC_ALPHA;
Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0 , ref blend, Win32.ULW_ALPHA);
}
finally
{
Win32.ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
Win32.SelectObject(memDc, oldBitmap);
Win32.DeleteObject(hBitmap);
}
Win32.DeleteDC(memDc);
}
}
API聲明：
class Win32
{
public enum Bool
{
False = 0 ,
True
} ;
[StructLayout(LayoutKind.Sequential)]
public struct Point
{
public Int32 x;
public Int32 y;
public Point(Int32 x, Int32 y)
{ this .x = x; this .y = y; }
}
[StructLayout(LayoutKind.Sequential)]
public struct Size
{
public Int32 cx;
public Int32 cy;
public Size(Int32 cx, Int32 cy)
{ this .cx = cx; this .cy = cy; }
}
[StructLayout(LayoutKind.Sequential, Pack = 1 )]
struct ARGB
{
public byte Blue;
public byte Green;
public byte Red;
public byte Alpha;
}
[StructLayout(LayoutKind.Sequential, Pack = 1 )]
public struct BLENDFUNCTION
{
public byte BlendOp;
public byte BlendFlags;
public byte SourceConstantAlpha;
public byte AlphaFormat;
}
public const Int32 ULW_COLORKEY = 0x00000001 ;
public const Int32 ULW_ALPHA = 0x00000002 ;
public const Int32 ULW_OPAQUE = 0x00000004 ;
public const byte AC_SRC_OVER = 0x00 ;
public const byte AC_SRC_ALPHA = 0x01 ;
[DllImport( " user32.dll " , ExactSpelling = true , SetLastError = true )]
public static extern Bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pprSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);
[DllImport( " user32.dll " , ExactSpelling = true , SetLastError = true )]
public static extern IntPtr GetDC(IntPtr hWnd);
[DllImport( " user32.dll " , ExactSpelling = true )]
public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
[DllImport( " gdi32.dll " , ExactSpelling = true , SetLastError = true )]
public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
[DllImport( " gdi32.dll " , ExactSpelling = true , SetLastError = true )]
public static extern Bool DeleteDC(IntPtr hdc);
[DllImport( " gdi32.dll " , ExactSpelling = true )]
public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
[DllImport( " gdi32.dll " , ExactSpelling = true , SetLastError = true )]
public static extern Bool DeleteObject(IntPtr hObject);
[DllImport( " user32.dll " , EntryPoint = " SendMessage " )]
public static extern int SendMessage( int hWnd, int wMsg, int wParam, int lParam);
[DllImport( " user32.dll " , EntryPoint = " ReleaseCapture " )]
public static extern int ReleaseCapture();
public const int WM_SysCommand = 0x0112 ;
public const int SC_MOVE = 0xF012 ;
public const int SC_MAXIMIZE = 61488 ;
public const int SC_MINIMIZE = 61472 ;
}
須要出現圖象的時刻挪用 SetBitmap 辦法。只需優化好，出現效力比通俗的Paint重繪方法高許多，而且不卡不閃耀，支撐隨意率性通明。
上面是本身開辟出來的後果：
這個是用OpenGL繪制的
後果是否是很酷呀，經由過程以上內容的引見，願望對年夜家的進修有所贊助。
