我已经创建了一个WIA Wrapper，我相信它对一些人会很有用。它仍处于开发阶段，但除了HasNextPage方法不起作用之外，它还可以正常工作。我已经从很多不同的来源采取的代码。但基本上，在我的代码中，WIA。如果ADF中没有页面，属性不会改变，所以它总是认为有另一个页面?我可以做一个潦草的(如果没有纸上的错误，试着抓住，但那太潦草了)
任何想法?
下面是我的代码:
ps -我不介意对编码标准的批评，请评论任何能让我成为更好的程序员的东西:)
(有几行代码，我有那里尝试和调试它)主要问题是，无论我做什么文档处理状态不改变
public struct PageSize
{
public double Height;
public double Width;
public PageSize(double height, double width)
{
this.Height = height;
this.Width = width;
}
}
class WIA_PROPERTIES
{
public const uint WIA_RESERVED_FOR_NEW_PROPS = 1024;
public const uint WIA_DIP_FIRST = 2;
public const uint WIA_DPA_FIRST = WIA_DIP_FIRST + WIA_RESERVED_FOR_NEW_PROPS;
public const uint WIA_DPC_FIRST = WIA_DPA_FIRST + WIA_RESERVED_FOR_NEW_PROPS;
//
// Scanner only device properties (DPS)
//
public const uint WIA_DPS_FIRST = WIA_DPC_FIRST + WIA_RESERVED_FOR_NEW_PROPS;
public const uint WIA_DPS_DOCUMENT_HANDLING_STATUS = WIA_DPS_FIRST + 13;
public const uint WIA_DPS_DOCUMENT_HANDLING_SELECT = WIA_DPS_FIRST + 14;
}
public class WiaWrapper
{
//Image Filenames
const string wiaFormatBMP = "{B96B3CAB-0728-11D3-9D7B-0000F81EF32E}";
const string wiaFormatPNG = "{B96B3CAF-0728-11D3-9D7B-0000F81EF32E}";
const string wiaFormatGIF = "{B96B3CB0-0728-11D3-9D7B-0000F81EF32E}";
const string wiaFormatJPEG = "{B96B3CAE-0728-11D3-9D7B-0000F81EF32E}";
const string wiaFormatTIFF = "{B96B3CB1-0728-11D3-9D7B-0000F81EF32E}";
//Standard Page Sizes
public PageSize A3 = new PageSize(16.5, 11.7);
public PageSize A4 = new PageSize(11.7, 8.3);
public PageSize A5 = new PageSize(8.3, 5.8);
public PageSize A6 = new PageSize(5.8, 4.1);
public string DeviceID;
#region Setup/select Scanner
/// <summary>
/// Select Scanner.
/// If you need to save the Scanner, Save WiaWrapper.DeviceID
/// </summary>
public void SelectScanner()
{
WIA.CommonDialog wiaDiag = new WIA.CommonDialog();
try
{
Device d = wiaDiag.ShowSelectDevice(WiaDeviceType.UnspecifiedDeviceType, true, false);
if (d != null)
{
DeviceID = d.DeviceID;
return;
}
}
catch (Exception ex)
{
throw new Exception("Error, Is a scanner chosen?");
}
throw new Exception("No Device Selected");
}
/// <summary>
/// Connect to Scanning Device
/// </summary>
/// <param name="deviceID"></param>
/// <returns></returns>
private Device Connect()
{
Device WiaDev = null;
DeviceManager manager = new DeviceManager();
//Iterate through each Device until correct Device found
foreach (DeviceInfo info in manager.DeviceInfos)
{
if (info.DeviceID == DeviceID)
{
WIA.Properties infoprop = info.Properties;
WiaDev = info.Connect();
return WiaDev;
}
}
throw new Exception("Scanner not found - Is it setup in DeviceID?");
}
#endregion
#region Scanning utilities - hasMorePages, SetupPageSize, SetupADF, DeleteFile
/// <summary>
/// Check to see if ADF has more pages loaded
/// </summary>
/// <param name="wia"></param>
/// <returns></returns>
private bool HasMorePages(Device wia)
{
//determine if there are any more pages waiting
Property documentHandlingSelect = null;
Property documentHandlingStatus = null;
string test = string.Empty;
foreach (Property prop in wia.Properties)
{
string propername = prop.Name;
string propvalue = prop.get_Value().ToString();
test += propername + " " + propvalue + "<br>";
if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_SELECT)
documentHandlingSelect = prop;
if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_STATUS)
documentHandlingStatus = prop;
}
if ((Convert.ToUInt32(documentHandlingSelect.get_Value()) & 0x00000001) != 0)
{
return ((Convert.ToUInt32(documentHandlingStatus.get_Value()) & 0x00000001) != 0);
}
string tester = test;
return false;
}
/// <summary>
/// Setup Page Size
/// </summary>
/// <param name="wia"></param>
private void SetupPageSize(Device wia, bool rotatePage, PageSize pageSize, int DPI, WIA.Item item)
{
//Setup Page Size Property
foreach (WIA.Property itemProperty in item.Properties)
{
if (itemProperty.Name.Equals("Horizontal Resolution"))
{
((IProperty)itemProperty).set_Value(DPI);
}
else if (itemProperty.Name.Equals("Vertical Resolution"))
{
((IProperty)itemProperty).set_Value(DPI);
}
else if (itemProperty.Name.Equals("Horizontal Extent"))
{
double extent = DPI * pageSize.Height;
if (rotatePage)
{
extent = DPI * pageSize.Width;
}
((IProperty)itemProperty).set_Value(extent);
}
else if (itemProperty.Name.Equals("Vertical Extent"))
{
double extent = DPI * pageSize.Width;
if (rotatePage)
{
extent = pageSize.Height * DPI;
}
((IProperty)itemProperty).set_Value(extent);
}
}
}
/// <summary>
/// Setup device to Use ADF if required
/// </summary>
private void SetupADF(Device wia, bool duplex)
{
string adf = string.Empty;
foreach (WIA.Property deviceProperty in wia.Properties)
{
adf += deviceProperty.Name + "<br>";
if (deviceProperty.Name == "Document Handling Select") //or PropertyID == 3088
{
int value = duplex ? 0x004 : 0x001;
deviceProperty.set_Value(value);
}
}
}
private void Delete_File(string filename)
{
//Overwrite File
if (File.Exists(filename))
{
//file exists, delete it
File.Delete(filename);
}
}
#endregion
#region Scan Page - Main Public Method
/// <summary>
/// Scan Page,
/// </summary>
/// <param name="wia">Connected Device</param>
/// <param name="pageSize">Page Size. A4, A3, A2 Etc</param>
/// <param name="RotatePage">Rotation of page while scanning</param>
public void Scan(PageSize pageSize, bool rotatePage, int DPI, string filepath, bool useAdf, bool duplex)
{
int pages = 0;
bool hasMorePages = false;
WIA.CommonDialog WiaCommonDialog = new WIA.CommonDialog();
try
{
do
{
//Connect to Device
Device wia = Connect();
WIA.Item item = wia.Items[1] as WIA.Item;
//Setup ADF
if ((useAdf) || (duplex))
SetupADF(wia, duplex);
//Setup Page Size
SetupPageSize(wia, rotatePage, pageSize, DPI,item);
WIA.ImageFile imgFile = null;
WIA.ImageFile imgFile_duplex = null; //if duplex is setup, this will be back page
imgFile = (ImageFile)WiaCommonDialog.ShowTransfer(item, wiaFormatJPEG, false);
//If duplex page, get back page now.
if (duplex)
{
imgFile_duplex = (ImageFile)WiaCommonDialog.ShowTransfer(item, wiaFormatJPEG, false);
}
string varImageFileName = filepath + "\Scanned-" + pages.ToString() + ".jpg";
Delete_File(varImageFileName); //if file already exists. delete it.
imgFile.SaveFile(varImageFileName);
string varImageFileName_duplex;
if (duplex)
{
varImageFileName_duplex = filepath + "\Scanned-" + pages++.ToString() + ".jpg";
Delete_File(varImageFileName_duplex); //if file already exists. delete it.
imgFile_duplex.SaveFile(varImageFileName);
}
//Check with scanner to see if there are more pages.
if (useAdf || duplex)
{
hasMorePages = HasMorePages(wia);
pages++;
}
}
while (hasMorePages);
}
catch (COMException ex)
{
throw new Exception(CheckError((uint)ex.ErrorCode));
}
}
#endregion
我现在认为这是我的扫描仪硬件(或驱动程序)的问题。我用的是理光Aficio IS330DC。
我所做的工作是放置一个Try/catch块，如果异常是Out Of Paper则完成。
。