C # WIA ADF Has the following page

Question

I created WIA Wrapper, which I believe will be useful for some people. It is still under development, but it all works, except that the HasNextPage method does not work. I took the code from different sources. But basically, in my code, WIA.Properties does not change if there are no pages left in the ADF, so it always thinks there is another page? I could do sloppy (try to catch if there is no paper error, but it is very messy)

Any ideas?

heres my code:

ps - I am not opposed to criticism regarding coding standards, comment on something that will make me a better programmer :)

(There are a few lines of code that I have to try and debug it). The main problem is that no matter what I do, the processing status of the document does not change

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 

Answer 1

Now I believe that this is a problem with the hardware (or driver) of the scanner. I am uysing Ricoh Aficio IS330DC.

Work on me was put by the Try / catch block, and if the exception is Out Of Paper, then finish.

He works.