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[C#] Reading text from MS Word files


Question

hey guys. how can i read the text from an MS word, and possibly other Ms Office files while using the least possible resources. If someone could share some code they already have for this, it wud be really sweet :p

basically what im trying to do is build a desktop searching application like MSNs googles and the others in C# for a class project. but mine doesnt have to be as complex or as feature rich. just a basic version of what they do.

any other tips wud also be appreciated.

thanks

danish

ps: im storing the data im indexing in an MS Access file. seems inefficient to me. any better way to do that?

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  • 0

What you'll probably have to do is add a COM reference to the Microsoft Word Object library and access word that way, but the word API isn't the friendliest thing in the world. this link should help though....

http://www.codeproject.com/aspnet/wordapplication.asp

However a better method might be to dump Access and use MS-SQL if you can as that will let you store office documents inside it, which it will index for you and let you search against the contents of these. Effectivly this will do all the hard work for you. Not sure if MSDE / SQL Express also does this.

  • 0

hey man. thanks for the response.

ok, the api is a bit resource intensive, since it involves loading up an instance of the ms word app in the memory. since i want to index files quickly, and there will be plenty of file types to index, the overhead of opening up each ms office app will be too much. isnt there some dll or somethin that can be used to index text from office files?

secondly regarding ms sql, the problem is that this has to be a redistributable desktop application. with ms accesss, i can easily bundle an mdb file with empty tables in the project. but with ms sql, i cant even be sure if the client pcs will hv it or not.

thanks for all ur help

danish

  • 0

If there is a dll that lets you peek into the file then I haven't heard of it, all the things I've done with Word were through the API. I see your issue with SQL server, the other option would have been usign MSDE \ SQL Express which you could include in your app, but unfortuantly these don't inlcude full text searchs because of size reasons. The last I heard this wasn't being re-considered. :(

Perhaps your best option is to use the IFILTER interface (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/indexsrv/html/ixrefint_9sfm.asp) which is what I'm lead to believe the MSN Desktop search uses to look inside files. I can't offer much info on these as they are new to me as of ten mins ago, but I'd imagine there would be Word and other office interfaces already floating around somewhere which you could use.

Hope this helps...

  • 0

Very easy (copied from an app i made) its in vb.net but that shouldnt stop you. You need references to the word.interop dlls:

            'Cheap way of opening word docs, open as a doc, and save as a text file. Then open the text file!
            Dim wWordApp As Word.Application = New Word.Application
            wWordApp.DisplayAlerts = Word.WdAlertLevel.wdAlertsNone

            Dim dFile As Word.Document = wWordApp.Documents.Open(CType(sFilename, Object))

            dFile.SaveAs(Path.GetDirectoryName(Application.ExecutablePath) + "\temp.txt", Word.WdSaveFormat.wdFormatText)
            dFile.Close()


  • 0

hey man. thanks for tht tip. but u see it involves creating an object of the wordapp class, which takes up a lot of resources. imagine if im indexing files on the fly as they get modified by the user. then i might hv a scenario where the user is working on a word doc, and xls spreadsheet and a powerpoint presentation at the same time, making changes to all 3.

i wud be repeatedly required to create instances of wordapp, excelapp and powerpointapp over and over again, which wud just make the resource consumption ghastly :p

thanks for replyin tho. really appreicate it :)

  • 0

I'm not sure how well this would work, but... If you were to open a Word .doc in a plain text editor (eg Notepad), you'd see a lot of unrecognizable characters plus the actual characters of the text that was written in Word. Since it sounds as though ou are only interested in the text, and not any of the formating, you may try opening and reading the Word .doc as a text file in your program (see TextReader class). Because Word may have stored newlines differently, you may be stuck with using only Read() or ReadtoEnd() methods. Perhaps ReadToEnd() stored in a string, and apply a regular expression (RegEx class) to parse this to only include "real" characters (eg \w\s to match word characters (digits and alphabet) and white space characters (mostly " " spaces, since Word would probably have goofed-up tabs, newlines, etc.)). I'm not sure how well this would work for other Office documents, however....

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hey everybody. thanks a lot for all the responses.

ive finally managed to figure this one out. the answer lies in the use of IFilters, as gooey suggested.

after a lot of searching on the net and a bit of tweaking, ive ,made a C Sharp class that can extract the text frrom .doc, .xls and .ppt files. ill post the code shortly, but i must warn that this class has very primitive error checking, and although it hardly ever crahses, its not feasable for distribution i would think. if somebody ever improves on this, pls do post a version here, or mail it to me. thanks a lot.

  • 0

Hi!

I'm working in a similar project but for a document management repository. I also need to parse doc files, although I'm using the Lucene .net project for storing and retrieving indexes.

Can you please post the C Sharp class in its actual status?

Thanks in Advance,

Tiago

  dtmunir said:
hey everybody. thanks a lot for all the responses.

ive finally managed to figure this one out. the answer lies in the use of IFilters, as gooey suggested.

after a lot of searching on the net and a bit of tweaking, ive ,made a C Sharp class that can extract the text frrom .doc, .xls and .ppt files. ill post the code shortly, but i must warn that this class has very primitive error checking, and although it hardly ever crahses, its not feasable for distribution i would think. if somebody ever improves on this, pls do post a version here, or mail it to me. thanks a lot.

585939867[/snapback]

  • 0

hey

i tried to post the code earlier on, but the newowin server kept giving me errors.sorry abt it. im tryin again now. hopefully it works this time.

Edited:

It works!!

ok this is how to use this:

add a new code file to ur project and just copy past all this code.

create a OfficeFileReader.OfficeFileReader object, can call the method GetText.

the syntax is as follows:

  Quote
public static void Main()

{

  OfficeFileReader.OfficeFileReader objOFR = new OfficeFileReader.OfficeFileReader()

  string output="";

  objOFR.GetText("C:\\MyWordFile.Doc", ref output);

  Console.WriteLine(output);

}

  Quote

///==============================================================

/// Office File Reader

///==============================================================

using System;

using System.Text;

using System.Runtime.InteropServices;

namespace OfficeFileReader

{

? ? #region Stuff you Dont even need to look at

? ? [Flags]

? ? public enum IFILTER_INIT

? ? {

? ? ? ? NONE = 0,

? ? ? ? CANON_PARAGRAPHS = 1,

? ? ? ? HARD_LINE_BREAKS = 2,

? ? ? ? CANON_HYPHENS = 4,

? ? ? ? CANON_SPACES = 8,

? ? ? ? APPLY_INDEX_ATTRIBUTES = 16,

? ? ? ? APPLY_CRAWL_ATTRIBUTES = 256,

? ? ? ? APPLY_OTHER_ATTRIBUTES = 32,

? ? ? ? INDEXING_ONLY = 64,

? ? ? ? SEARCH_LINKS = 128,

? ? ? ? FILTER_OWNED_VALUE_OK = 512

? ? }

? ? [Flags]

? ? public enum IFILTER_FLAGS

? ? {

? ? ? ? OLE_PROPERTIES = 1

? ? }

? ? public enum CHUNK_BREAKTYPE

? ? {

? ? ? ? CHUNK_NO_BREAK = 0,

? ? ? ? CHUNK_EOW = 1,

? ? ? ? CHUNK_EOS = 2,

? ? ? ? CHUNK_EOP = 3,

? ? ? ? CHUNK_EOC = 4

? ? }

? ? [Flags]

? ? public enum CHUNKSTATE

? ? {

? ? ? ? CHUNK_TEXT = 0x1,

? ? ? ? CHUNK_VALUE = 0x2,

? ? ? ? CHUNK_FILTER_OWNED_VALUE = 0x4

? ? }

? ? public enum PSKIND

? ? {

? ? ? ? LPWSTR = 0,

? ? ? ? PROPID = 1

? ? }

? ? [structLayout(LayoutKind.Sequential)]

? ? public struct PROPSPEC

? ? {

? ? ? ? public uint ulKind;

? ? ? ? public uint propid;

? ? ? ? public IntPtr lpwstr;

? ? }

? ? [structLayout(LayoutKind.Sequential)]

? ? public struct FULLPROPSPEC

? ? {

? ? ? ? public Guid guidPropSet;

? ? ? ? public PROPSPEC psProperty;

? ? }

? ? [structLayout(LayoutKind.Sequential)]

? ? public struct STAT_CHUNK

? ? {

? ? ? ? public uint idChunk;

? ? ? ? [MarshalAs(UnmanagedType.U4)]

? ? ? ? public CHUNK_BREAKTYPE breakType;

? ? ? ? [MarshalAs(UnmanagedType.U4)]

? ? ? ? public CHUNKSTATE flags;

? ? ? ? public uint locale;

? ? ? ? [MarshalAs(UnmanagedType.Struct)]

? ? ? ? public FULLPROPSPEC attribute;

? ? ? ? public uint idChunkSource;

? ? ? ? public uint cwcStartSource;

? ? ? ? public uint cwcLenSource;

? ? }

? ? [structLayout(LayoutKind.Sequential)]

? ? public struct FILTERREGION

? ? {

? ? ? ? public uint idChunk;

? ? ? ? public uint cwcStart;

? ? ? ? public uint cwcExtent;

? ? }

? ? #endregion

? ? [ComImport]

? ? [Guid("89BCB740-6119-101A-BCB7-00DD010655AF")]

? ? [interfaceType(ComInterfaceType.InterfaceIsIUnknown)]

? ? public interface IFilter

? ? {

? ? ? ? void Init([MarshalAs(UnmanagedType.U4)] IFILTER_INIT grfFlags,

? ? ? ? ? ? ? ? ? uint cAttributes,

? ? ? ? ? ? ? ? ? [MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)] FULLPROPSPEC[] aAttributes,

? ? ? ? ? ? ? ? ? ref uint pdwFlags);

? ? ? ? void GetChunk([MarshalAs(UnmanagedType.Struct)] out STAT_CHUNK pStat);

? ? ? ? [PreserveSig]

? ? ? ? int GetText(ref uint pcwcBuffer, [MarshalAs(UnmanagedType.LPWStr)] StringBuilder buffer);

? ? ? ? void GetValue(ref UIntPtr ppPropValue);

? ? ? ? void BindRegion([MarshalAs(UnmanagedType.Struct)]FILTERREGION origPos, ref Guid riid, ref UIntPtr ppunk);

? ? }

? ? [ComImport]

? ? [Guid("f07f3920-7b8c-11cf-9be8-00aa004b9986")]

? ? public class CFilter

? ? {

? ? }

? ? public class Constants

? ? {

? ? ? ? public const uint PID_STG_DIRECTORY = 0x00000002;

? ? ? ? public const uint PID_STG_CLASSID = 0x00000003;

? ? ? ? public const uint PID_STG_STORAGETYPE = 0x00000004;

? ? ? ? public const uint PID_STG_VOLUME_ID = 0x00000005;

? ? ? ? public const uint PID_STG_PARENT_WORKID = 0x00000006;

? ? ? ? public const uint PID_STG_SECONDARYSTORE = 0x00000007;

? ? ? ? public const uint PID_STG_FILEINDEX = 0x00000008;

? ? ? ? public const uint PID_STG_LASTCHANGEUSN = 0x00000009;

? ? ? ? public const uint PID_STG_NAME = 0x0000000a;

? ? ? ? public const uint PID_STG_PATH = 0x0000000b;

? ? ? ? public const uint PID_STG_SIZE = 0x0000000c;

? ? ? ? public const uint PID_STG_ATTRIBUTES = 0x0000000d;

? ? ? ? public const uint PID_STG_WRITETIME = 0x0000000e;

? ? ? ? public const uint PID_STG_CREATETIME = 0x0000000f;

? ? ? ? public const uint PID_STG_ACCESSTIME = 0x00000010;

? ? ? ? public const uint PID_STG_CHANGETIME = 0x00000011;

? ? ? ? public const uint PID_STG_CONTENTS = 0x00000013;

? ? ? ? public const uint PID_STG_SHORTNAME = 0x00000014;

? ? ? ? public const int FILTER_E_END_OF_CHUNKS = (unchecked((int)0x80041700));

? ? ? ? public const int FILTER_E_NO_MORE_TEXT = (unchecked((int)0x80041701));

? ? ? ? public const int FILTER_E_NO_MORE_VALUES = (unchecked((int)0x80041702));

? ? ? ? public const int FILTER_E_NO_TEXT = (unchecked((int)0x80041705));

? ? ? ? public const int FILTER_E_NO_VALUES = (unchecked((int)0x80041706));

? ? ? ? public const int FILTER_S_LAST_TEXT = (unchecked((int)0x00041709));

? ? ? ?

? ? }

? ? public class OfficeFileReader

? ? {?

? ? ? ? public void GetText(String path,ref string text)

? ? ? ? ? ? // path is the path of the .doc, .xls or .ppt? file

? ? ? ? ? ? // text is the variable in which all the extracted text will be stored

? ? ? ? {

? ? ? ? ? ? String result = "";

? ? ? ? ? ? int count = 0;

? ? ? ? ? ? try

? ? ? ? ? ? {

? ? ? ? ? ? ? ? IFilter ifilt = (IFilter)(new CFilter());

? ? ? ? ? ? ? ? //System.Runtime.InteropServices.UCOMIPersistFile ipf = (System.Runtime.InteropServices.UCOMIPersistFile)(ifilt);

? ? ? ? ? ? ? ? System.Runtime.InteropServices.ComTypes.IPersistFile ipf= (System.Runtime.InteropServices.ComTypes.IPersistFile)(ifilt);

? ? ? ? ? ? ? ? ipf.Load(@path, 0);

? ? ? ? ? ? ? ? uint i = 0;

? ? ? ? ? ? ? ? STAT_CHUNK ps = new STAT_CHUNK();

? ? ? ? ? ? ? ? ifilt.Init(IFILTER_INIT.NONE, 0, null, ref i);

? ? ? ? ? ? ? ? int hr = 0;

? ? ? ? ? ? ? ?

? ? ? ? ? ? ? ? while (hr == 0)

? ? ? ? ? ? ? ? {

? ? ? ? ? ? ? ? ? ?

? ? ? ? ? ? ? ? ? ? ? ? ifilt.GetChunk(out ps);

? ? ? ? ? ? ? ? ? ? ? ? if (ps.flags == CHUNKSTATE.CHUNK_TEXT)

? ? ? ? ? ? ? ? ? ? ? ? {

? ? ? ? ? ? ? ? ? ? ? ? ? ? uint pcwcBuffer = 1000;

? ? ? ? ? ? ? ? ? ? ? ? ? ? int hr2 = 0;

? ? ? ? ? ? ? ? ? ? ? ? ? ? while (hr2 == Constants.FILTER_S_LAST_TEXT || hr2 == 0)

? ? ? ? ? ? ? ? ? ? ? ? ? ? {

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? try

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? {

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? pcwcBuffer = 1000;

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? System.Text.StringBuilder sbBuffer = new StringBuilder((int)pcwcBuffer);

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? hr2 = ifilt.GetText(ref pcwcBuffer, sbBuffer);

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? // Console.WriteLine(pcwcBuffer.ToString());

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? if (hr2 >= 0) result += sbBuffer.ToString(0, (int)pcwcBuffer);

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? //textBox1.Text +="\n";

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? // result += "#########################################";

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? count++;

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? }

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? catch (System.Runtime.InteropServices.COMException myE)

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? {

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Console.WriteLine(myE.Data + "\n" + myE.Message + "\n");

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? }

? ? ? ? ? ? ? ? ? ? ? ? ? ? }

? ? ? ? ? ? ? ? ? ? ? ? }

? ? ? ? ? ? ? ? ? ?

? ? ? ? ? ? ? ? }

? ? ? ? ? ? ? ?

? ? ? ? ? ? }

? ? ? ? ? ? catch (System.Runtime.InteropServices.COMException myE)

? ? ? ? ? ? {

? ? ? ? ? ? ? ? Console.WriteLine(myE.Data + "\n" + myE.Message + "\n");

? ? ? ? ? ? }

? ? ? ? ? ? text = result;

? ? ? ? ? ? //return count;

?  return;

? ? ? ? }

? ? }

}

Edited by dtmunir
  • 0

Hi I get these errors while trying to make a class library, any ideas ???

Preparing resources...

Updating references...

Performing main compilation...

e:\documents and settings\upake\my documents\visual studio projects\classlibrary2\officefilereader.cs(308,36): error CS0234: The type or namespace name 'ComTypes' does not exist in the class or namespace 'System.Runtime.InteropServices' (are you missing an assembly reference?)

e:\documents and settings\upake\my documents\visual studio projects\classlibrary2\officefilereader.cs(309,5): error CS0246: The type or namespace name 'ipf' could not be found (are you missing a using directive or an assembly reference?)

e:\documents and settings\upake\my documents\visual studio projects\classlibrary2\officefilereader.cs(338,27): error CS0117: 'System.Runtime.InteropServices.COMException' does not contain a definition for 'Data'

e:\documents and settings\upake\my documents\visual studio projects\classlibrary2\officefilereader.cs(349,23): error CS0117: 'System.Runtime.InteropServices.COMException' does not contain a definition for 'Data'

Please help

  • 0

ok, i dont hv VS 2003, or .Net 1.1.

I built this on VS 2005 and .Net 2.0 Beta

but i dont think that should be a problem, b/c the code isnt mine, and the site i took it from didnt build it on .Net 2.0

since i cant figure out wat the problem is, if u want, i could compile this code into a dll, so that you could use.

or if any one else has managed to make this code work on VS 2003, pls share....

  • 0

Hi,

That will be great, can you mail the dll to upake.de.silva@gmail.com.

Thanks man

Upake

  dtmunir said:
ok, i dont hv VS 2003, or .Net 1.1.

I built this on VS 2005 and .Net 2.0 Beta

but i dont think that should be a problem, b/c the code isnt mine, and the site i took it from didnt build it on .Net 2.0

since i cant figure out wat the problem is, if u want, i could compile this code into a dll, so that you could use.

or if any one else has managed to make this code work on VS 2003, pls share....

586126041[/snapback]

  • 0

Thanks a lot, this is exactly what I was looking for.

I'm also using VS .NET 2003 and I got the same compiler errors but managed to fix it - I don't know yet what I'm doing, hehe.

I can now read excel, word and powerpoint files. I tried installing the adobe pdf ifilter, but I still can't read pdf's. Does anyone have an idea how to get pdfs to work?

Change the comments=

 //System.Runtime.InteropServices.UCOMIPersistFile ipf = (System.Runtime.InteropServices.UCOMIPersistFile)(ifilt);
System.Runtime.InteropServices.ComTypes.IPersistFile ipf= (System.Runtime.InteropServices.ComTypes.IPersistFile)(ifilt);

to:

System.Runtime.InteropServices.UCOMIPersistFile ipf = (System.Runtime.InteropServices.UCOMIPersistFile)(ifilt);
//System.Runtime.InteropServices.ComTypes.IPersistFile ipf= (System.Runtime.InteropServices.ComTypes.IPersistFile)(ifilt);

  • 0

u need to change the GUID value of the GUID Attribute at the CFilter. The class is as below

[ComImport()]

[Guid("4C904448-74A9-11d0-AF6E-00C04FD8DC02")]

public class CFilter

{

}

and now u can read pdf files as text.

I have some bit lying around in my home pc which returns iFilter according to the file (ofcourse if the ifilter is installed for that file type). As soon as i reach home. I will post the code.

Umer

  • 0

Just to add: I also had to remove the myE.Data to get it to work, seems to be another 2005 thing?

Anyway, I wonder if there is some way to know if the last chunk has been read? it seems to just try reading until an exception is thrown? The variable hr might have been intended for this, but it is never changed in the code - any idea what hr could stand for?

  • 0

I guess I found the solution to the problem myself.

I never tried any COM interop before this, so quite a bit of the "magic" is a bit confusing. But If I change

void GetChunk([MarshalAs(UnmanagedType.Struct)] out STAT_CHUNK pStat);

to

[PreserveSig]
int GetChunk([MarshalAs(UnmanagedType.Struct)] out STAT_CHUNK pStat);

It doesn't throw exceptions any more but instead returns error values like the original method.

Sorry i'm new to this forum, it might be trivial but it caused be a great deal of headache :)

  • 0

Use the below class together with the class posted by dtmunir before and use this below sample to parse any kind of file whose iFilter is installed on the machine

I got this code sample from CodeProject. There is a project by the name of Office Desktop Search. I found the below very useful so i thought i should post it here.

And it doesnt matter to my boss using Internet at the workplace danish bhai. They dont even know i have something known as USB Flash Drive (256MB) in my pocket everytime;) but i try to be as sincere as possible!!! I hv never copied any office file on the usb :shifty: :rolleyes:

Looks like as if we are

Umer

// Sample for using the below class
public string ParseFile(string filename)
{
  if (Parser.IsParseable(filename) == true)
  {
    return Parser.Parse(path)
  }
  else
  {
   return "" // or throw an exception or whatever
  }
}

// Add all this code to another file and place it with the class posted by the dtmunir
using System;
using System.Runtime.InteropServices;
using System.Text;

namespace OfficeFileReader
{
	/// <summary>
	/// Summary description for Parser.
	/// </summary>
	public class Parser
	{
  public Parser()
  {
  }

  [DllImport("query.dll", CharSet = CharSet.Unicode)] 
  private extern static int LoadIFilter (string pwcsPath, ref IUnknown pUnkOuter, ref IFilter ppIUnk); 

  [ComImport, Guid("00000000-0000-0000-C000-000000000046")] 
  [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
  private interface IUnknown 
  { 
  	[PreserveSig] 
  	IntPtr QueryInterface( ref Guid riid, out IntPtr pVoid ); 

  	[PreserveSig] 
  	IntPtr AddRef(); 

  	[PreserveSig] 
  	IntPtr Release(); 
  } 


  private static IFilter loadIFilter(string filename)
  {
  	IUnknown iunk = null; 
  	IFilter filter = null;

  	// Try to load the corresponding IFilter 
  	int resultLoad = LoadIFilter( filename, ref iunk, ref filter ); 
  	if (resultLoad != (int)IFilterReturnCodes.S_OK) 
  	{ 
    return null;
  	} 
  	return filter;
  }

/*
  private static IFilter loadIFilterOffice(string filename)
  {
  	IFilter filter = (IFilter)(new CFilter());
  	System.Runtime.InteropServices.UCOMIPersistFile ipf = (System.Runtime.InteropServices.UCOMIPersistFile)(filter);
  	ipf.Load(filename, 0);

  	return filter;
  }
*/

  public static bool IsParseable(string filename)
  {
  	return loadIFilter(filename) != null;
  }

  public static string Parse(string filename)
  {
  	IFilter filter = null;

  	try 
  	{
    StringBuilder plainTextResult = new StringBuilder();
    filter = loadIFilter(filename); 

    STAT_CHUNK ps = new STAT_CHUNK();
    IFILTER_INIT mFlags = 0;

    uint i = 0;
    filter.Init( mFlags, 0, null, ref i);

    int resultChunk = 0;

    resultChunk = filter.GetChunk(out ps);
    while (resultChunk == 0)
    {
    	if (ps.flags == CHUNKSTATE.CHUNK_TEXT)
    	{
      uint sizeBuffer = 60000;
      int resultText = 0;
      while (resultText == Constants.FILTER_S_LAST_TEXT || resultText == 0)
      {
      	sizeBuffer = 60000;
      	System.Text.StringBuilder sbBuffer = new System.Text.StringBuilder((int)sizeBuffer);
      	resultText = filter.GetText(ref sizeBuffer, sbBuffer);

      	if (sizeBuffer > 0 && sbBuffer.Length > 0)
      	{
        string chunk = sbBuffer.ToString(0, (int)sizeBuffer);
        plainTextResult.Append(chunk);
      	}
      }
    	}
    	resultChunk = filter.GetChunk(out ps);
    }
    return plainTextResult.ToString();
  	}
  	finally
  	{
    if (filter != null)
    	Marshal.ReleaseComObject(filter);
  	}
  }
	}
}

  • 0

This works too, but in all the approaches I have tried so far, I always get an application error, but only with pdf files:

(ReadFile.exe is the name of my assembly)

Font Capture: ReadFile.exe - Application Error

The instruction at "0x030a61b3" referenced memory at "0x03a823e8". The memory could not be "read"

This always happens when my program closes - it works perefctly fine until I exit Main()...

I wonder if this has something to do with the Adobe IFilter not being released properly?

This topic is now closed to further replies.
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    • T-FORCE XTREEM 6000/C30 DDR5 memory review: Blows Corsair VENGENCE away by Steven Parker TEAMGROUP is a memory, AIO and SSD manufacturer based out of Taiwan and founded in 1997. They sell memory under the T-FORCE brand, and when their contact person reached out to me wondering if I was interested in taking a look at their memory sticks, I jumped at the chance; this follows a review for I did for them back in May testing their DELTA 7200MT/s DDR5 memory kit. First a disclosure, TEAMGROUP sent me this XTREEM DDR5 32GB (2x16GB) 6000MT/s CL30 Black kit sample to keep, without any review pre-approval. Sayan Sen contributed to this feature, and also provided the benchmark graphics. Specifications First off, here are the full specifications of this memory kit. XTREEM DDR5 32GB (2x16GB) 6000MHz CL30 Brand T-FORCE Series XTREEM Model FFXD532G6000HC30DC01 Capacity 32GB (2 x 16GB) Type 288-Pin PC RAM Speed DDR5 6000 (PC5 48000) CAS Latency CL30 Timing 30-36-36-76 Voltage 1.35V Die SK Hynix M-Die 4.D Rank 1xR (Single Rank) ECC No, On-Die ECC Buffered/Registered Unbuffered BIOS/Performance Profile Intel XMP 3.0 / AMD EXPO Color Black, White Heat Spreader Yes Recommend Use Intel 800,700 / AMD 800, 700 Series LED Color No Price $105.99 Introduction The T-FORCE memory was benchmarked in the following system: Cooler Master MasterBox NR200P MAX ASRock Z790 PG-ITX/TB4 Intel Core i7-14700K with Thermal Grizzly Carbonaut Pad Corsair Vengeance 2x16GB 6000MT/s CL30 (XMP Profile) TEAMGROUP T-FORCE DELTA 2x16GB 7600MT/s CL36 ASRock AMD Radeon RX 7900 XTX Phantom Gaming Kingston Fury Renegade SSD The ASRock Z790 PG-ITX/TB4 motherboard had BIOS version 15.01 at the time of testing, and I reset BIOS to default settings and only enabled the Intel XMP 3.0 profile with all of the tested memory. Windows 11 was up to date with July Patch Tuesday build 26100.4652 (KB5062553) at the time of testing and I ensured I had minimal programs running in the background with the exception of AMD Adrenaline, Razer Central, and Microsoft Defender active in the system tray. Benchmarks For our benchmarks, UL Solutions provided us with Professional (commercial use) licenses for 3DMark, and Procyon; and a copy of AIDA64 Engineer was provided to us by Aida64.com. In addition, HWiNFO provided us with a commercial license that let us confirm that this kit is Hynix SK, M-die, Single Rank memory. We start with AIDA64 Cache & Memory Benchmark for all four kits to get a measure of the full capabilities of each of them: T-FORCE XTREEM DDR5-6000 CL30: Corsair VENGENCE DDR5-6000 CL30: T-FORCE XTREEM DDR5-7600 CL36: T-FORCE XTREEM DDR5-7200 CL34: Following the purely synthetic tests, we next move to workloads that are more representative of typical tasks like gaming, AI, productivity, and other everyday usages. For reference, in the charts below, the memory kits are sorted by different color shades of blue, the higher the frequency the deeper the shade. Starting with 3DMark, we tested the physics test only and not the entire suite since the CPU is what is necessary for processing the game physics, logic, as well as GPU draw calls for the graphics card. A CPU-heavy test like the 3DMark Physics test helps to gauge the CPU's true gaming capability. The XTREEM DDR5-6000 CL30 kit does exceptionally well on 3DMark DirectX 11 especially in Sky Diver—which also makes sense, given that it is lighter graphically and thus the CPU has more to do here than on Fire Strike, relatively speaking. On Sky Diver, we see a 19% better performance than the Corsair VENGEANCE memory that is specced similar. On Fire Strike too the XTREEM 6000 CL30 was the fastest. In DirectX 12, things do not change much as TeamGroup's 6000 CL30 kit keeps up with the faster memories. However the performance differences are not as prominent as were in the case of DX 11 since the older API was more single-thread bound and thus ran into CPU bottlenecks far more easily. The XTREEM 6000 C30 RAM uses SK Hynix M-Die and that could explain this really great showing. The AIDA64 memory and cache synthetic benchmark above did not hint at such a big gap in real-world performance and this has definitely surprised us, in a good way. 7-Zip decompression was the only test the new T-FORCE memory lost in, though as you can see above, the scores are all quite close to one another. In decompression however the XTREEM 6000 CL30 kit trumps the CORSAIR VENGEANCE by a good margin.. Next we checked out AIDA64's AES, Zlib and PhotoWorxx benchmarks as we wanted to see check performance in things like encryption (AES), data compression (Zlib), and image processing (PhotoWorxx). AIDA64 showed almost no difference in the AES test as all kits were in the margin of error territory. This surprised us as we thought the RAM differences would reflect better in an encryption benchmark. That is evidently not the case as it seems the processor is more important. It's a similar story for Zlib too, which was another surprising result given that Z-Zip earlier showed a significant difference. Thus, it is clearly not a case of one-size-fits-all as the compression algorithm on Zlib is much less sensitive to memory than the one in the 7-zip benchmark. PhotoWorxx was where we saw the differences between the kits. Both the 7200 and the 7600 modules were much faster than the 6000 ones. We tested browsing performance using Speedometer 3.0. Speedometer provides a value and also a range showing the highest and lowest scores as indicated in the chart above by the two set of scores for each browser. Microsoft Edge showed the most response to faster memory speeds but Chrome also liked the new XTREEM 6000 RAM. Mozilla's Firefox too, which was generally quite uncaring of memory speed and latencies in case of the other kits, seemed to love these XTREEM Black 6000 CL30 modules. Next up, we did some productivity testing with UL's Procyon suite of benchmarks. First up, we have the Office test and the TeamGroup 6000 C30 kit does an amazing job here as it even outpaces the faster memories. We also ran Computer Vision, which is an AI inference benchmark and saw identical figures with each of the RAM kit. Each of them put up around 192 points. We used the WinML API and float32 precision as it is more memory-heavy than float16. Finally we have Geekbench AI and once more, the XTREEM 6000 CL30 put on a great show especially in the case of the Quantized metric. However, it must be noted that we updated Geekbench AI from 1.2.0 to 1.4.0 and although Geekbench warns that scores cannot be compared between major versions, what the margin of error is between point versions is unknown. Pricing Kit Capacity Timings Current Price T-FORCE XTREEM DDR5-6000 CL30 2 x 16GB 30-38-38-76 1.35V $105.99 Corsair VENGENCE DDR5-6000 CL30 2 x 16GB 30-36-36-76 1.40V $135.99 T-FORCE XTREEM DDR5-7600 CL36 2 x 16GB 36-46-46-84 1.40V $137.99 T-FORCE XTREEM DDR5-7200 CL34 2 x 16GB` 34-42-42-84 1.40V $186.99 Conclusion Coming into the review, I did not expect to see such a big difference in the kits' performances; since both the TeamGroup and the Corsair are rated at 6000 CL30, I thought they would be trading blows in most cases. However as we see, that is clearly not the case as the XTREEM Black memory punches well above its weight. Currently the kit of Corsair Vengence on Amazon costs $30 more since the XTREEM memory is ~$106; in fact there's a note that the Corsair kit is frequently returned, which is not good. I find it hard to find any faults at all with this memory kit and it is a 10 out of 10 for sure considering the value and the performance. The only thing that may be works against it is the lack of RGB lighting but that is simply not enough to deduct a point in our book given its outstandingvalue for money. TEAMGROUP gets a thumbs up from me for their T-FORCE memory, they installed without any issues and from the multiple times I powered on the system, the ASRock motherboard did not have to recalculate the timings. As an Amazon Associate we earn from qualifying purchases.
    • Yes, it was interesting looking back during the decade. Too bad MS is ending support after about two years of relative stability.
    • It was Steve Jobs Next that became MacOs. Original Unix was no longer open source after Jobs got his hands on it. Apple bought his company and brought him back as they were struggling at the time.
    • Unlike Chromebooks and Windows there is no commercial push behind it so not many devices are shipping with it, although Steam Deck is an exception here. For people into PC gaming they are working on projects like Bazzite but it is an independent thing, not a commercial push. You can play MMOs on Linux. RuneScape, World of Warcraft, Eve Online, FF14, Elder Scrolls Online... Regarding professional work, most of what people do could be done on Linux, it would just be edge cases where this isn't possible.
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