Re: Using iTextSharp to Convert Tiff files to PDF - C# Discussion Boards

Using iTextSharp to Convert Tiff files to PDF

23-Sep-09 2:22

named pipe is always used in vc, c++ program.
if you want to use it in c# program.
consider to use win32 Api to create it.

//sever
CreateNamedPipe 'create a named pipe
ConnectNamedPipe 'listen the client connect request
ReadFile 'get client's data
WriteFile 'send client's data
DisconnectNamedPipe 'close the named pipe
CloseHandle 'close the named pipe's handle

//client
WaitNamedPipe 'wait a named pipe to use
CreateFile
ReadFile
WriteFile
CloseHandle

modified 27-May-14 5:29am.

Mondis10-Sep-09 8:53

10-Sep-09 8:53

I have been trying to get the this to work and have been successful when using tiff files that have certain compression ilke LZW however I cannot get a tiff file that has compression JPEG Original TIFF 6.0 compression set for it. In fact I cannot bring up this tiff in windows picture and fax viewer! Has anyone else run into this?

Mondis

Christian Graus10-Sep-09 11:42

Christian Graus

10-Sep-09 11:42

If windows can't read it, then the codec in question is not supported by windows in general, and that's probably why iTextSharp can't read it either. That means you need to find a library that includes that codec, in order to work with those images.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Mondis10-Sep-09 16:01

10-Sep-09 16:01

I have read somewhere that it is possible to remove the tiff header as the file I am working with is basically a JPEG. Do you have any idea how to do that. The example code I saw was written in spanish. I can open the image using a file stream and read that into a byte array, but I don't know how to find the header information and strip it out.

Thanks for any info!

Mondis

Christian Graus10-Sep-09 16:10

Christian Graus

10-Sep-09 16:10

It's a jpeg inside a tiff ? You'd have to look for the file format online to work out what bytes you need to remove, in order to be left with the JPEG. It may be fixed number, or it could be variable and you'll need to parse it to work it out.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Mondis10-Sep-09 16:27

10-Sep-09 16:27

I believe it is a JPEG inside a TIF. It's a weird thing in an application I used to work on but didn't handle the Imaging software so I don't know anything about it. I am just hoping to find something that will do the trick.

Mondis

carlecomm23-Sep-09 2:20

23-Sep-09 2:20

you mean Tiff picture to PDF format?

try to use 'image.save()' in C# to change picture's format.

modified 27-May-14 5:29am.

Mondis23-Sep-09 2:37

problem clalculating hours and minutes

23-Sep-09 2:37

Thanks for the tip however it didn't work. The issue is definitly the compression type used to create the tiff image. I was able to resolve the issue using the original program that created the tiff to safe it with a different compression and then convert to Tiff.

Thanks
Ray

Mondis

Jassim Rahma10-Sep-09 8:20

Jassim Rahma

10-Sep-09 8:20

how can I calculate the total hours and minutes between two DateTimes? I tried this code but it's getting it correctly..

<pre>TimeSpan time_difference = DateTime.Now - Convert.ToDateTime(gridComputers.GetRowCellValue(i, "start_time"));

double usage_hours = time_difference.TotalHours;
double usage_minutes = usage_hours - ((int)usage_hours * 60);
string total_usage = String.Format("{0}h {1}m", (int)usage_hours, (int)usage_minutes);</pre>

OriginalGriff10-Sep-09 8:27

OriginalGriff

10-Sep-09 8:27

jrahma wrote:

how can I calculate the total hours and minutes between two DateTimes? I tried this code but it's getting it correctly..

TimeSpan time_difference = DateTime.Now - Convert.ToDateTime(gridComputers.GetRowCellValue(i, "start_time"));

double usage_hours = time_difference.TotalHours;
double usage_minutes = usage_hours - ((int)usage_hours * 60);
string total_usage = String.Format("{0}h {1}m", (int)usage_hours, (int)usage_minutes);

If it is getting it correctly, then I don't see you have a problem!

Actually I do, but never mind. Why are you playing with

double usage_minutes = usage_hours - ((int)usage_hours * 60);

Why not use

double usage_minutes = tume_difference.TotalMinutes;

See example here[^]

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Not Active10-Sep-09 8:45

Not Active

10-Sep-09 8:45

OriginalGriff wrote:
double usage_minutes = tume_difference.TotalMinutes;

I don't believe that would give the results the OP is looking for. For instance with a TimeSpan representing 1.5 hours, TotalMinutes = 90. I believe what he wants is 1h 30m

only two letters away from being an asset

OriginalGriff10-Sep-09 8:53

OriginalGriff

10-Sep-09 8:53

Makes sense! So use:

double usage_minutes = (double) time_difference.TotalMinutes % 60;

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Luc Pattyn10-Sep-09 9:55

Luc Pattyn

10-Sep-09 9:55

what is wrong with TimeSpan.Hours and TimeSpan.Minutes?

Smile | :)

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

Local announcement (Antwerp region): Lange Wapper? Neen!

OriginalGriff10-Sep-09 10:03

OriginalGriff

10-Sep-09 10:03

Luc Pattyn wrote:
what is wrong with TimeSpan.Hours and TimeSpan.Minutes?

I don't like the colour.

That's my excuse, and I'm sticking with it.

Nothing to do with my forgetting about them, no siree!

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Luc Pattyn10-Sep-09 10:16

Luc Pattyn

10-Sep-09 10:16

Unfortunately, TimeSpan is sealed so you can't simply inherit and modify some aspects. If you don't like its color, you'll have to redo everything from scratch. Make sure to implement full skinning capabilities, compatible with XP, Vista and 7.

Smile | :)

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

Local announcement (Antwerp region): Lange Wapper? Neen!

DaveyM6910-Sep-09 22:13

DaveyM69

10-Sep-09 22:13

Dave

Generic BackgroundWorker - My latest article!
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

0x3c010-Sep-09 8:36

0x3c0

10-Sep-09 8:36

Your problem is in usage_minutes. You subtract 60h from h, which gives you a total minutes value of -59 * usage_hours. What you should be doing is something like time_difference.TotalMinutes % 60 (excluding freaky stuff like leap seconds, etc)

OSDev

carlecomm23-Sep-09 1:10

Is there a way to registry factories when an assembly is loaded?

23-Sep-09 1:10

'TotalHours' is not the same to 'Hours';
'TotalMinutes' is not the same to 'Minutes';

//for example
private string DateDiff(DateTime DateTime1, DateTime DateTime2)
{string dateDiff = null;
TimeSpan ts1 = new TimeSpan (DateTime1.Ticks);
TimeSpan ts2 = new TimeSpan (DateTime2.Ticks);
TimeSpan ts = ts1.Subtract(ts2).Duration();
dateDiff = ts.Days.ToString()+"days"+ ts.Hours.ToString()+"hours"+ ts.Minutes.ToString()+"minutes"+ ts.Seconds.ToString()+"seconds";
return dateDiff;
}

modified 27-May-14 5:29am.

k66610-Sep-09 8:01

k666

10-Sep-09 8:01

I would like to implement factory methods to transfer data between the gui controls and my dataobjects. The gui controls can be ASP.NET web controls or Windows controls and I have a utility library for each environment. The dataobjects can run in either environment and should know nothing about which it is in.

So what I would like to happen is that when the Web utility library is loaded the webgui<->do bridges are registered and when the Windows utility library is loaded the wingui<->do bridges are registered. That way the dataobjects can send/receive data from the gui without knowing which gui it is.

It seems like such a basic requirements for factories. Is there a way to do this?

Re: Is there a way to registry factories when an assembly is loaded?

Not Active10-Sep-09 8:35

Not Active

10-Sep-09 8:35

Maybe have a look here[^]

"Inversion of Control containers allow you to achieve loosely coupled designs and they handle dependency and configuration management when you, or a class in your system, request a service to say, send e-mails, you will get an instance ready to be used."

only two letters away from being an asset

strong name verification

amit_upadhyay10-Sep-09 7:49

amit_upadhyay

10-Sep-09 7:49

I have a third party library which i have added to the skip verification list, using sn, on my computer.
I wanted to know whether the application (after deploying it on some other computer) will run?
Do i have to perform some other tasks after the deployment (setup)?

Re: strong name verification

I Believe In GOD10-Sep-09 12:08

I Believe In GOD

10-Sep-09 12:08

Yes it will work ,

SN protected the Application Exe bytes from begin modify.

I know nothing , I know nothing ...

Problem with Visio ExportAsFixedFormat

NarVish10-Sep-09 6:15

NarVish

10-Sep-09 6:15

Hi,

I'm trying to use ExportAsFixedFormat with a Visio Document. I'm using Office 2007 and Visual studio 2008.

Here is my code:
ApplicationClass visioApplication = new ApplicationClass();
Document visioDocument = visioApplication.Documents.Open(@"C:\temp.vsd");
visioDocument.ExportAsFixedFormat(VisFixedFormatTypes.visFixedFormatPDF,
@"c:\visio.pdf", VisDocExIntent.visDocExIntentPrint,
VisPrintOutRange.visPrintAll, 0, 0, false, true, true, true, false, null);

I've been trying different values for the bools and enums, but with no
success. All I get is a COMException telling me "Invalid parameter".

Any suggestions?
Thanks in advance.

Re: Problem with Visio ExportAsFixedFormat

carlecomm23-Sep-09 1:06