C# 使用TWAIN协议进行扫描仪操作

折腾两台扫描仪程序的修改，今天有空把程序中涉及到扫描仪操作的代码贴出来，供大家一起交流学习。

 1 public ArrayList TransferPictures()

 2         {

 3             ArrayList pics = new ArrayList();

 4             if (srcds.Id == IntPtr.Zero)

 5                 return pics;

 6 

 7             TwRC rc;

 8             IntPtr hbitmap = IntPtr.Zero;

 9             TwPendingXfers pxfr = new TwPendingXfers();

10 

11             do

12             {

13                 pxfr.Count = 0;

14                 hbitmap = IntPtr.Zero;

15 

16                 TwImageInfo iinf = new TwImageInfo();//扫描仪设置的扫描图片信息

17 

18                 rc = DSiinf(appid, srcds, TwDG.Image, TwDAT.ImageInfo, TwMSG.Get, iinf);//获取扫描图片信息

19                 if (rc != TwRC.Success)

20                 {

21                     CloseSrc();

22                     return pics;

23                 }

24 

25 

26                 rc = DSixfer(appid, srcds, TwDG.Image, TwDAT.ImageNativeXfer, TwMSG.Get, ref hbitmap);//扫描程序，如果扫描完成，则返回XferDone

27                 if (rc != TwRC.XferDone)

28                 {

29                     CloseSrc();

30                     return pics;

31                 }

32 

33 

34                 rc = DSpxfer(appid, srcds, TwDG.Control, TwDAT.PendingXfers, TwMSG.EndXfer, pxfr);//结束扫描

35                 if (rc != TwRC.Success)

36                 {

37                     CloseSrc();

38                     return pics;

39                 }

40 

41                 pics.Add(hbitmap);

42             }

43             while (pxfr.Count != 0);

44 

45             rc = DSpxfer(appid, srcds, TwDG.Control, TwDAT.PendingXfers, TwMSG.Reset, pxfr);

46             return pics;

47         }