iTextSharp PDF Overlay - C# Discussion Boards

Member 10521793 wrote:
but its probably completely wrong.

Why do you think so? What does happen instead of what you expect to happen? Any error messages? Any missing functionality?

HttpWebResponse response = (HttpWebResponse)request.GetResponse(); - unable to connect to remote server.And how do I open chrome using the proxy I'm requesting?

Thanks in advance.

Unable to connect: is the IP address of the proxy correct? Does the proxy need credentials?
Chrome: That's a question of how to configure Chrome, not a question of C# coding!

Hello everyone,

I am looking for script which online convert Kurti dev to uni code and uni code yo kurti dev convert by script in C#.

Please help me for the script. how to write or anyone have ready made script.

Cry | :((

Check this article & ask that author for more
Unicode to Krutidev, Krutidev to Unicode Convertor in C#[^]

thatraja

Code converters | Education Needed | Improve Everything^New

Thanks but I already checked it but it is not complete script so if you have complete script then let me know?

Nope. Better ask that author & also Google.

thatraja

Code converters | Education Needed | Improve Everything^New

Hello,

I am asking myself for a couple of hours how I can work around the following problem.

It seems that I need to create my PDF by using "Document" instead of PdfStamper to get the size and rotation. But there are two problems I have with this.
- The Opacity seems not to work (Docu //Overlay Transperency)
- I can't figure out how I can decide if the overlay is in background or foreground.
With

C#

PdfContentByte cb1 = outputWriter.DirectContent;

it seems always to be in the foreground. I can also create the PdfContentByte with

C#

PdfContentByte cb1 = outputWriter.DirectContentUnder;

but I can't figure out how I can do something like this ...

C#

if (<condition>)
  PdfContentByte cb1 = outputWriter.DirectContentUnder;
else
  PdfContentByte cb1 = outputWriter.DirectContent;

This is my code.

C#

string TempFileName = "";

TempFileName = Path.GetTempFileName();

FilePdfReader = new PdfReader(FileMemoryStream);
Document inputDoc = new Document(FilePdfReader.GetPageSizeWithRotation(1));





using (FileStream fs = new FileStream(TempFileName, FileMode.Create))
{
    //Create the PDF Writer to create the new PDF Document
    PdfWriter outputWriter = PdfWriter.GetInstance(inputDoc,fs);

    inputDoc.Open();


    //Create the Content Byte to stamp to the writer
    PdfContentByte cb1 = outputWriter.DirectContent;

    //Get the PDF document to use as overlay
    PdfReader overlayReader = new PdfReader(OverlayMemoryStream);
    PdfImportedPage overLay = outputWriter.GetImportedPage(overlayReader, 1);

    PdfGState GState = new PdfGState();

    //Get the overlay page rotation
    int overlayRotation = overlayReader.GetPageRotation(1);

    int n = FilePdfReader.NumberOfPages;

    int i = 1;
    while (i <= n)
    {
        //Make sure the new page's page size macthes the original document
        inputDoc.SetPageSize(FilePdfReader.GetPageSizeWithRotation(i));
        inputDoc.NewPage();


        PdfImportedPage page = outputWriter.GetImportedPage(FilePdfReader, i);
        int rotation = FilePdfReader.GetPageRotation(i);


        //Overlay Transperency
        if ( (OverlayFillOpacity != 0f) || (OverlayStrokeOpacity != 0f) )
        {
            GState.FillOpacity = OverlayFillOpacity;
            GState.StrokeOpacity = OverlayStrokeOpacity;

            cb1.SaveState();
            cb1.SetGState(GState);
        }


        //Insert the overlay with correct rotation
        if (overlayRotation == 90 || overlayRotation == 270)
        {
            cb1.AddTemplate(overLay, 0, -1f, 1f, 0, 0,
                FilePdfReader.GetPageSizeWithRotation(i).Height);
        }
        else
        {
            cb1.AddTemplate(overLay, 1f, 0, 0, 1f, 0, 0);
        }

        //Insert the original PDF page with correct rotation
        if (rotation == 90 || rotation == 270)
        {
            cb1.AddTemplate(page, 0, -1f, 1f, 0, 0,
                FilePdfReader.GetPageSizeWithRotation(i).Height);
        }
        else
        {
            cb1.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
        }

        //Increment the page
        i++;
    }

    //Close the input file
    inputDoc.Close();
    //Close the reader for the overlay file
    overlayReader.Close();

Hi,

I have a form for the user to enter how many passengers to add.

I would like to enter txtFirstName, txtLastName, cbodateOfBrith and txtPassportNumber for the x number of passengers entered in the previous form.

so if the user choosed 4 then 4 rows of the controls should be added.

how can I do this in WinForm?

Technology News @ www.JassimRahma.com

Doesn't sound like a good design.

You'll never get very far if all you do is follow instructions.

There are quite a few ways to do this, depending on your skill level and abilities:
1) You could create each control individually and add them in a row inside a panel
2) You could create a UserControl which has one of each of the controls you need and then add one of that for each passenger
3) You could use some grid based control instead - such as a DataGridView

But what you want is a bit...um...odd. The first thing which looks like a silly idea is "cbodateOfBrith" which I assume is a combobox for the date of birth. How many dates do you propose to put in that? 120 years worth? OMG | :OMG:

Would you want to try and enter the date from that? Because I wouldn't! Consider a DateTimePicker instead...

And I wouldn't do it that way either: Instead of asking for the number of passengers, use a grid based control that the user can edit directly and let them add all the rows they need. This shows how to create a Calender control within a DataGridView: http://msdn.microsoft.com/en-us/library/7tas5c80.aspx[^]

Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

When I am changing my design of my program and then run the program it's still using the previous design. I just seem to get it working, can someone help me cause I don't have a clue

Thanks

Are you rebuilding (i.e. recompiling) your app after you change it?

/ravi

My new year resolution: 2048 x 1536
Home | Articles | My .NET bits | Freeware
ravib(at)ravib(dot)com

how do you mean?

The application (.exe file) is created after recompiling your source code. Simply changing your code won't automatically recompile the app. So make sure you rebuild (recompile) before running the app. If this doesn't make sense, see this[^] link.

/ravi

My new year resolution: 2048 x 1536
Home | Articles | My .NET bits | Freeware
ravib(at)ravib(dot)com

I have found that doing a clean then a build sometimes helps. I have had to restart VS to get some things to happen. Not sure what problem VS has but it sure seems quirky to me. In the worst cases I have had to manually clean the obj and bin folders. Although that can cause other flaky things.

Jack of all trades, master of none, though often times better than master of one.

I see questions/comments like this quite often here, and yet I have never seen this problem first hand. I don't find VS quirky at all, I find it a very resilient application (even the Express versions).

I think it depends what you are doing.
I didn't find the WPF in 2008 at all robust, and try playing with abstract base UserControls in WinForms and you are heading for a world of pain in any version of VS post 2005! Laugh | :laugh:

Even in 2010 there are some flaky moments when the editor refuses to display any changes - though it applies them to the file just to be annoying...reboot VS fixes it.
It's a complex program, and I guess if you use the flaky bits you get a flaky product - it you use the stable bits you get a stable product! Wink | ;)

Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

There's a fatal thing in Visual Studio. Normally when a build fails as a result of hitting F5 a little dialog pops up telling you its failed and asking if you want to run the previous version. NEVER select 'don't show this again' as it can be less that obvious that your build has failed and your running an out of date .exe.

If you've done this, that will be why and you need to trawl through the endless settings to undo it.

Regards,
Rob Philpott.

It's sheer brilliance that one can hide that dialog for ever Big Grin | :-D

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

I have a small prototype that allows a user to highlight a rectangle on an image. The program will analyze this highlighted portion and change the pixels properties of the pixels. Above a certain treshold it will set it to white, below the treshold the pixel is set to orange.

This stuff works using the SetPixel/GetPixel method, but I read that performance is better with the LockBits/UnlockBits method.
So I tried the following:

C#

System.Drawing.Imaging.BitmapData bmpdata = tmpbmp.LockBits(tmprect, System.Drawing.Imaging.ImageLockMode.ReadWrite, tmpbmp.PixelFormat);
IntPtr pointer = bmpdata.Scan0;
//int nrofbytes = Math.Abs(bmpdata.Stride) * bmpdata.Height;  //stride = scan width
int nrofbytes = bmpdata.Width * bmpdata.Height;  //stride = scan width
byte [] bytes = new byte[nrofbytes];
	
System.Runtime.InteropServices.Marshal.Copy(pointer, bytes, 0, nrofbytes);
System.Drawing.Color color_white = System.Drawing.Color.White;
System.Drawing.Color color_orange = System.Drawing.Color.Orange;
long count = 0;
for(int i = 0; i < bytes.Length-3; i+=3){
	if(bytes[i] > 235 && bytes[i+1] > 235 && bytes[i+2] > 235){
		bytes[i] = color_white.R;
		bytes[i+1] = color_white.G;
		bytes[i+2] = color_white.B;
	}											//end if
	else{
		count++;
		bytes[i] = color_orange.R;
		bytes[i+1] = color_orange.G;
		bytes[i+2] = color_orange.B;
	}											//end else
}												//end for
System.Runtime.InteropServices.Marshal.Copy(bytes, 0, pointer, nrofbytes);
tmpbmp.UnlockBits(bmpdata);

This doesn't work in the sense that the highlighted part is:
1. not white/orange, but rather white/gray
2. it changes entire rows of the image instead of the rectangle portion I passed.

for 1. it might be some sort of index offset, I guess.
I'm pretty sure the culprit for 2. is this line:

C#

System.Runtime.InteropServices.Marshal.Copy(bytes, 0, pointer, nrofbytes);

but I'm not sure why or how to solve it.
Anyone have any experience with this?

Many thanks.

V.

(MQOTD rules and previous solutions)

Hmm. Tricky, it sounds like things have got out of alignment.

As I recall, stride may not be exactly the width of a line as I think word alignment comes into it. (Not 100% on that). Also nrofbytes = stride * height * bits per pixel / 8. I don't think you array is large enough, multiply by 3 at least.

Also there seems to be some implicit assumption that you have one byte per RGB channel - is this guaranteed? Often you have an alpha channel as well which is nice as it makes each pixel a pleasing 32 bits. That might explain the greys you are seeing.

And I think:

for(int i = 0; i < bytes.Length-3; i+=3

should be:

for(int i = 0; i < bytes.Length; i+=3)

Regards,
Rob Philpott.

Tricky answer Smile | :)

.

PixelFormat is set to Format24bppRgb so it "should" be just RGB.
I modified the array size to:

C#

int nrofbytes = bmpdata.Width * bmpdata.Height * 3;

in debug I noticed that height and width are pixels and Stride is Bytes so you indeed need to use stride or multiply the Height Width with 3.

The result remains the same though, the image changes the complete rows. (this time in black and white)
I'll keep on looking.

thanks for the tips!

V.

(MQOTD rules and previous solutions)

With 24 bbp your shoudl compute number of bytes like this:

C#

nrofbytes = Math.Abs(bmpdata.Stride) * tmpbmp.Height;

And the order of RGB in the array is
0 - B
1 - G
2 - R

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

Sorry to bother you again, but I changed the algorithm so the entire image is "converted". It doesn't do what I want, yet, but it does what I expect it to do. Except for one thing: The image appears to be converted to grayscale somehow. Debug shows the bytes are set to (0,128,0) which is green, but the result is always gray. I tried with gray and lightgray instead of green and this works. (or seems to work, there is a clear difference in the gray scale).
I set it to BGR instead of RGB and I also tried to add the alpha component (setting pixelformat to 32 in that case).

I'm confused because the original image is a jpg with bit dept 24 and is read in as a bmp with PixelFormat = Format24bppRgb.
The Set/Get pixel method does allow colors.

Google didn't give me any results on this.

thanks.

V.

(MQOTD rules and previous solutions)