Public class bmp2jpeg
{
PRIVATE long = 50L;
Private imagecodecinfo myimagecodecinfo;
Private encoderparameters myencoderparameters;
Public BMP2JPEG (Long Quality)
{
LQUALITY = QUALITY;
Ini ();
}
Private void ini ()
{
System.drawing.imaging.Encoder myencoder;
Encoderparameter Myencoderparameter;
MyImageCodecInfo = getencoderinfo ("image / jpeg");
Myencoder = system.drawing.imaging.Encoder.quality;
MyEncoderParameters = New EncoderParameters (1);
MyEncoderParameter = New EncoderParameter (MyEncoder, LQuality);
Myencoderparameters.Param [0] = MyEncoderParameter;
}
Public BMP2JPEG ()
{
Ini ();
}
Private static imagecodecinfo getencoderinfo (String Mimetype)
{
Int J;
Imagecodecinfo [] encoders;
Encoders = imagecodecinfo.getimageEncoders ();
For (j = 0; j { IF (Encoders [J] .mimeType == MimeType) Return Encoders [J]; } Return NULL; } Public Byte [] BMPTOJPEGBUFF (Bitmap Bmpsrc) { Memorystream msjpg = new memoryStream (); Bmpsrc.save (MSJPG, MyImageCodecInfo, MyEncoderparameters); Byte [] bjpeg = msjpg.toArray (); Return BJPEG; } Public Byte [] bmptojpegbuff (byte [] bmpsrc) { MemoryStream MS = New MemoryStream (BMPSRC); Memorystream msjpg = new memoryStream (); Bitmap mybitmap = new bitmap (ms, false); //mybitmap.save ("c://temp/ " i.tostring() ".jpg", MyImageCodecInfo, MyEncoderParameters; Mybitmap.save (MSJPG, MyImageCodecInfo, MyEncoderparameters); Byte [] bjpeg = msjpg.toArray (); Return BJPEG; } Public stream bmptojpegstream (byte [] bmpsrc) { MemoryStream MS = New MemoryStream (BMPSRC); MemoryStream msjpg = new memorystream (); Bitmap mybitmap = new bitmap (ms, false); //mybitmap.save ("c://temp/ " i.tostring() ".jpg", MyImageCodecInfo, MyEncoderParameters; Mybitmap.save (MSJPG, MyImageCodecInfo, MyEncoderparameters); Return MSJPG; } Public Bool BMPTOJPEGFILE (Byte [] Bmpsrc, String FileName) { MemoryStream MS = New MemoryStream (BMPSRC); Bitmap mybitmap = new bitmap (ms, false); Mybitmap.save (FileName, MyImageCodecInfo, MyEncoderparameters); Return True; } Public Bool BMPTOJPEGFILE1 (Bitmap Bmpsrc, String FileName) { Bmpsrc.save (FileName, MyImageCodecInfo, MyEncoderparameters); Return True; } } -------------------------------------------------- ------------- The simplest way should be: Bitmap Image = New Bitmap ("Your Image path.bmp"); Image.save ("New JPG File Path", ImageFormat.jpg); Note: Don't forget to introduce namespaces. In addition, the compression ratio of JPG is also different relative to the same content size accuracy, in short, it is very big. Especially simple graphical compression ratios are very good. -------------------------------------------------- ------------- Imageformat class (under Namement System.drawing.Imaging), you can implement conversion between BMP, GIF, ICON, JPEG, PNG, TIFF, WMF, and other common image formats. Open the file that needs to be converted, store it in a variable Bitmap.save (filename, imageformat.jpg);
