GDI+怎么直接保存图像到字节数组
GDI+怎么直接保存图像到字节数组，谢谢。。

[解决办法]
使用 GdipBitmapLockBits 与 GdipBitmapUnlockBits
可以把他的bitmap数据读到一个数组里。

[解决办法]
如果是BMP格式的图片，可以使用Open语句来打开，存入数组
[解决办法]

VB code

Option Explicit'Example Name:DIBPrivate Const BI_RGB = 0&Private Const DIB_RGB_COLORS = 0 '  color table in RGBsPrivate Type BITMAPINFOHEADER '40 bytes        biSize As Long        biWidth As Long        biHeight As Long        biPlanes As Integer        biBitCount As Integer        biCompression As Long        biSizeImage As Long        biXPelsPerMeter As Long        biYPelsPerMeter As Long        biClrUsed As Long        biClrImportant As LongEnd TypePrivate Type RGBQUAD        rgbBlue As Byte        rgbGreen As Byte        rgbRed As Byte        rgbReserved As ByteEnd TypePrivate Type BITMAPINFO        bmiHeader As BITMAPINFOHEADER        bmiColors As RGBQUADEnd TypePrivate Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As LongPrivate Declare Function CreateDIBSection Lib "gdi32" (ByVal hdc As Long, pBitmapInfo As BITMAPINFO, ByVal un As Long, ByVal lplpVoid As Long, ByVal handle As Long, ByVal dw As Long) As LongPrivate Declare Function GetDIBits Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long) As LongPrivate Declare Function SetDIBitsToDevice Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal dx As Long, ByVal dy As Long, ByVal SrcX As Long, ByVal SrcY As Long, ByVal Scan As Long, ByVal NumScans As Long, Bits As Any, BitsInfo As BITMAPINFO, ByVal wUsage As Long) As LongPrivate Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As LongPrivate Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As LongPrivate Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As LongPrivate Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As LongPrivate Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As LongDim iBitmap As Long, iDC As LongPrivate Sub Form_Paint()    Dim bi24BitInfo As BITMAPINFO    Dim bBytes() As Byte    Dim Cnt As Long    With bi24BitInfo.bmiHeader        .biBitCount = 24        .biCompression = BI_RGB        .biPlanes = 1        .biSize = Len(bi24BitInfo.bmiHeader)        .biWidth = 100        .biHeight = 100    End With    ReDim bBytes(1 To bi24BitInfo.bmiHeader.biWidth * bi24BitInfo.bmiHeader.biHeight * 3) As Byte    iDC = CreateCompatibleDC(0)    iBitmap = CreateDIBSection(iDC, bi24BitInfo, DIB_RGB_COLORS, ByVal 0&, ByVal 0&, ByVal 0&)    SelectObject iDC, iBitmap    BitBlt iDC, 0, 0, bi24BitInfo.bmiHeader.biWidth, bi24BitInfo.bmiHeader.biHeight, GetDC(0), 0, 0, vbSrcCopy    GetDIBits iDC, iBitmap, 0, bi24BitInfo.bmiHeader.biHeight, bBytes(1), bi24BitInfo, DIB_RGB_COLORS    For Cnt = LBound(bBytes) To UBound(bBytes)        If bBytes(Cnt) < 50 Then            bBytes(Cnt) = 0        Else            bBytes(Cnt) = bBytes(Cnt) - 50        End If    Next Cnt    SetDIBitsToDevice Me.hdc, 0, 0, bi24BitInfo.bmiHeader.biWidth, bi24BitInfo.bmiHeader.biHeight, 0, 0, 0, bi24BitInfo.bmiHeader.biHeight, bBytes(1), bi24BitInfo, DIB_RGB_COLORS    DeleteDC iDC    DeleteObject iBitmapEnd Sub