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[micjahn]

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[manishabb2011]

Hello,

I am a software developer in medical industry. My project already uses ZXing.net for barcode creation.

I am exploring about setting the DataMatrix module formats/layout e.g. 12x26 or 12x36 in c#.
In fact there is specific requirement to set format as 12x26 with each element size 20mil.
But I could not find anything on google search.

Please guide.
Thanks

[micjahn]

This snippet should work and should set the dimension constraints to your needs.

                var writer = new BarcodeWriter
                {
                    Format = BarcodeFormat.DATA_MATRIX,
                    Options = new ZXing.Datamatrix.DatamatrixEncodingOptions
                    {
                        MinSize = new Dimension(26, 12),
                        MaxSize = new Dimension(26, 12),
                    }
                };
                var image = writer.Write("<your content here>");

The element size of 20mil depends on your output device. In my opinion you have to stretch the resulting image to your desired size.

[fikri1985]

Hello,

I am VB 2019 programmer.

I am using ZXing 0.16.6 to create QR, DataMatrix and Code128 barcode as picture at windows GUI.

The source code as below. I have 2 concerns :

1. any way to remove white background at outer side of DataMatrix barcode
2. any way to remove string for Code128 barcode. I used command .PureBarcode = True however string still appear

`
Dim QR As QrCodeEncodingOptions
Dim QRWriter As IBarcodeWriter
QR = New QrCodeEncodingOptions

Dim DM As DatamatrixEncodingOptions
Dim DMWriter As IBarcodeWriter
DM = New DatamatrixEncodingOptions

Dim BLLinear As Code128EncodingOptions
Dim BLLinearWriter As IBarcodeWriter
BLLinear = New Code128EncodingOptions

QR.CharacterSet = "UTF-8"
QR.DisableECI = True
QR.PureBarcode = True
QRWriter = New BarcodeWriter
QRWriter.Format = BarcodeFormat.QR_CODE
QRWriter.Options.Width = 60
QRWriter.Options.Height = 60
QRWriter.Options.Margin = 0
PictureBox2.Image = New Bitmap(QRWriter.Write("AAbbCC1234567890_DD-MMM-YYY_00,11,22"))

DM.PureBarcode = True
DMWriter = New BarcodeWriter
DMWriter.Format = BarcodeFormat.DATA_MATRIX
DMWriter.Options.Width = 60
DMWriter.Options.Height = 60
DMWriter.Options.Margin = 0
PictureBox3.Image = New Bitmap(DMWriter.Write("AAbbCC1234567890_DD-MMM-YYY_00,11,22"))

BLLinear.PureBarcode = True
BLLinearWriter = New BarcodeWriter
BLLinearWriter.Format = BarcodeFormat.CODE_128
PictureBox4.Image = New Bitmap(BLLinearWriter.Write("12345678901234567890"))`

[micjahn]

Generate Datamatrix with width and height as 0 to get the smallest possible image without the margin. Scale it manually to your needs.

DMWriter = New BarcodeWriter
DMWriter.Format = BarcodeFormat.DATA_MATRIX
DMWriter.Options.Width = 0
DMWriter.Options.Height = 0
DMWriter.Options.Margin = 0
PictureBox3.Image = New Bitmap(DMWriter.Write("AAbbCC1234567890_DD-MMM-YYY_00,11,22"))

Set the value for PureBarcode at the options property of the BLLinearWriter

BLLinearWriter = New BarcodeWriter
BLLinearWriter.Format = BarcodeFormat.CODE_128
BLLinearWriter.Options.PureBarcode = True
PictureBox4.Image = New Bitmap(BLLinearWriter.Write("12345678901234567890"))

[rmrudro]

Hello Everyone I want to know how I can implement Concatenated QR Code using Zxing . I work in a Japanease company . I implemented QR code using Zxing I can read and Write QR Code . But I have a question How can I implement Concatenated QR Code. First I want to say what is Concatenated QR Code is .
[Supplemental Information on Concatenated QR Code]

Concatenated QR code is not a function to "divide a character string into multiple symbols".
It is a function to "express one character string with multiple symbols".

To read the symbol output as a concatenated QR code, a reader that supports the concatenation function is required.
Since each symbol also contains information such as "what number out of what", the symbol alone cannot read the correct character string.

If you set double-byte characters, single-character data may be output across two symbols. This is by design.

Many QR code reader apps that can be used on smartphones and tablets do not support the link function.
To check the output of the linked QR code, install an app that announces support for the linked function, or use a dedicated scanner.

Concatenated QR code is written 連結QRコード. Here is the Ruby site It is also written what is Linked or Concatenated QR code.
You can also check it from here https://linuxtut.com/ruby-generate-concatenated-qr-code-with-rqrcode-(knowledge)-3dd4c/
Here it is written What is a linked QR code?
The QR code has a "concatenation function" that divides long data into up to 16 QR codes and combines them when reading. (For details, refer to QR Code.com)
In Japan, you will often see prescriptions from hospitals / clinics.
The output function is supported by third-party form output libraries, but it is difficult to find it in the OSS library, so I have been using it rqrcode. I modified rqrcode) so that it can be output.
This time, the target is to output the concatenated QR code to be recorded in the above "prescription", so only the QR code in 8bit_byte mode is targeted.
In this Japanease site there is also implemented Concatenated QR Code
https://programresource.net/2013/05/04/2193.html
But is written in Java Can you help me how to implement Concatenated QR Code

[kernalpanic123]

Hi,
A customer of mine is requesting a GS1 QR code in navision. Just by inserting the line
barcodeWriter.Options.GS1Format := TRUE
didnt give me the correct output. Do i need to do something more so that the brackets are eliminated during scanning and so that the QR code contain FNC1 Characters

Thank you in advance.

https://github.com/micjahn/ZXing.Net/releases/download/v0.16.4.0/ZXing.Net.0.16.4.0.zip

[TryFunction] GenerateBarcode(content : Text;barcodeType : Text;height : Integer;width : Integer;pureBarcode : Boolean;margin : Integer;rotateDegree : '0,90,180,270';VAR tempBlobVar : TEMPORARY Record TempBlob)
IF NOT tempBlobVar.ISTEMPORARY THEN
  ERROR('tempBlobVar must be temporary');

CASE UPPERCASE(barcodeType) OF
  'ITF': barcodeFormat := barcodeFormat.ITF;
  'CODE_128': barcodeFormat := barcodeFormat.CODE_128;
  //'UPC_A': barcodeFormat := barcodeFormat.UPC_A;
  //'EAN_8': barcodeFormat := barcodeFormat.EAN_8;
  'EAN_13': barcodeFormat := barcodeFormat.EAN_13;
  //'CODE_39': barcodeFormat := barcodeFormat.CODE_39;
  //'CODABAR': barcodeFormat := barcodeFormat.CODABAR;
  //'PLESSEY': barcodeFormat := barcodeFormat.PLESSEY;
  //'MSI': barcodeFormat := barcodeFormat.MSI;
  'QR_CODE': barcodeFormat := barcodeFormat.QR_CODE;
  //'PDF_417': barcodeFormat := barcodeFormat.PDF_417;
  //'AZTEC': barcodeFormat := barcodeFormat.AZTEC;
  //'DATA_MATRIX': barcodeFormat := barcodeFormat.DATA_MATRIX;
  ELSE
    ERROR('Unknow barcodeType: %1', barcodeType);
END;

encodingOptions := encodingOptions.EncodingOptions();
encodingOptions.Height := height;
encodingOptions.Width := width;
encodingOptions.PureBarcode := pureBarcode;
encodingOptions.Margin := margin;

barcodeWriter := barcodeWriter.BarcodeWriter();
barcodeWriter.Format := barcodeFormat;
barcodeWriter.Options := encodingOptions;
//barcodeWriter.Options.GS1Format := TRUE;  
bitmap := barcodeWriter.Write(content);

IF rotateDegree > rotateDegree::"0" THEN BEGIN
  CASE rotateDegree OF
    rotateDegree::"90": rotateFlipType := rotateFlipType.Rotate90FlipNone;
    rotateDegree::"180": rotateFlipType := rotateFlipType.Rotate180FlipNone;
    rotateDegree::"270": rotateFlipType := rotateFlipType.Rotate270FlipNone;
  END;
  bitmap.RotateFlip(rotateFlipType);
END;

imageFormat := imageFormat.Jpeg;
tempBlobVar.Blob.CREATEOUTSTREAM(outstr);
bitmap.Save(outstr, imageFormat);

bitmap.Dispose;

[micjahn]

barcodeWriter.Options.GS1Format only adds the FNC1 character at the beginning of the mode header.
Groups have to be added by special characters in the content.
Please take a look at the following wiki article: https://github.com/micjahn/ZXing.Net/wiki/Generating-GS1-DataMatrix-and-GS1-Code128-barcodes

[VitroBC]

Hello, I'm experiencing the same issue. I'm using //barcodeWriter.Options.GS1Format := TRUE; but I can't get the DataMatrix reading to recognize it as GS1. Additionally, I'm unsure how to input the Char29 as they suggest. Did you find a solution? I can't find anything related to it. Thank you very much.

[VitroBC]

Hello, I'm experiencing the same issue. I'm using //barcodeWriter.Options.GS1Format := TRUE; but I can't get the DataMatrix reading to recognize it as GS1. Additionally, I'm unsure how to input the Char29 as they suggest. Did you find a solution? I can't find anything related to it. Thank you very much.

[droselloc]

Hello, I am using zxing for the development of an application in vb.net winform for the laboratory. I need to generate codes in datamatrix format but I have a problem. It depends on the length of the string to encoder the code comes out square or rectangle. Could it be forced to always be square?

[micjahn]

Sample for C#, should be similar in VB.Net:

var writer = new BarcodeWriter
{
    Options = new ZXing.Datamatrix.DatamatrixEncodingOptions
   {
      SymbolShape = ZXing.Datamatrix.Encoder.SymbolShapeHint.FORCE_SQUARE
   }
};
var image = writer.Write("<your content here>");

[zBugi]

Hello, I am still new to C# and I use zxing for net5.0 but it is giving me a Warning. But it works so freaking fast compared to the other libs and didn't have any issue with that should I be aware of that or just ignore this warning, because I don't get any kind of warning message just the yellow annoying triangle on Dependencies ->Packages-> ZXing.Net in Visual Studio 2019?

[micjahn]

Would be great to know what the message of the warning is. Should be visible if you hover over the warning symbol or perhaps it is shown in the output window.

[mickagau]

Hello
First of all thank you for this great framework. I learn a lot every time i use it :)

I have a particular need where i would like to set a fix size for a module of pdf417 instead of letting the library to define the best module size in pix. For instance a size of module of 7 pixels in width.

Please could you list where i would have to modify source code to do so (or if not doable at all) ?

Idea would be to send a parameter as a hint (if this hint does not exist then library define best module size in pix as it already does).

Thank you
Mickael

[micjahn]

I'm not sure but I think you should take a look at the class ZXing.PDF417.Internal.PDF417 and the method determineDimensions.

[mickagau]

Thank you for your answer Michael.

Yes this is the method i was trying to play with but without success so far.

Finally by reading source code, i think that i have more to play with ImageAspectRatio, cols min max, rows min max parameter and the width and height in pixel of the image. No need to touch source code.

As far as i understand, algorithm to define rows and cols is based on 1 pixel for module width and a preferred ratio (image aspect ratio).
Then in rendering method, it calculates a scale factor according to width and height parameters in pixel.
So by playing with image aspect ratio and min max cols/rows, i should get the final rendering expected of 5 pixels for the width of a module according to my resolution.

Regards
Mickael

[mickagau]

Hello

Finally, it is not clear to me how is calculated the rows and cols quantity for pdf417
Does someone know what are the 2 const below and how they are calculated?
private const float DEFAULT_MODULE_WIDTH = 0.357f; //1px in mm
private const float HEIGHT = 2.0f; //mm

They are used to determine the cols and rows quantity for pdf417 in this formula.
float newRatio = (((float)BarcodeMatrix.COLUMN_WIDTH * cols + start_stop_width) * DEFAULT_MODULE_WIDTH) / (rows * HEIGHT);

I replaced the formula by
float newRatio = (((float)BarcodeMatrix.COLUMN_WIDTH * cols + start_stop_width) * DEFAULT_MODULE_WIDTH) / (rows * DEFAULT_MODULE_WIDTH * aspectRatio);

which for me makes more sense as we want to have a ratio in image based on rows and column (maybe i misunderstand the meaning of this parameter).
It works or at least i can read back several pdf417 that i generate with this formula but i am really not sure if it can generate a side effect somewhere :(

May be someone already did some study on this ImagaAspectRatio parameter and could share result?

Thank you
Mickael

[mickagau]

Hello
Sorry for this spam, just to finish the discussion :)
Finally my first comment was the good one.
I had to play with min max columns and min max rows but the point is that Min Max columns number does not count the Start Stop, right and left row indicator so my settings were not good.
By adjusting quantity of data to be encoded, the size of the barcode and those min max rows cols, i can set the width bar as expected to 5 pixels and set it readable by the device on the field.

Once again, thank you for this great library.

Regards
Mickael

[micjahn]

You are welcome. I think it isn't spam. Perhaps another user finds the information useful, too.

[Danielxmu]

Hello Michael

I am VB programmer as well and used ZXing to create GS1 DataMatrix as picture at windows GUI in Excel doc.
According to below code, I can get the result with datamatrix content and pic, but it didn't comply with GS1 DM format, how can I fixed it? Hope get your help...

Function Encode_To_DM_Code_To_File() Dim Writer As IBarcodeWriter, cont As String Dim DMCodeOptions As New DatamatrixEncodingOptions Set Writer = New BarcodeWriter cont = "(8010)338911AGSH33020-0101+(93)220407+(90)421298573+(91)AGSH33020-01+(92)01+(8011)22040011" Writer.Format = BarcodeFormat_DATA_MATRIX Set Writer.Options = DMCodeOptions DMCodeOptions.Height = 200 DMCodeOptions.Width = 200 DMCodeOptions.Margin = 5 DMCodeOptions.SymbolShape = SymbolShapeHint_FORCE_SQUARE Writer.WriteToFile cont, ThisWorkbook.Path & "\test.png", ImageFileFormat_Png End Function

[micjahn]

ZXing doesn't support human-readable content style as you did ("(0810)33...+(93)...".
Please build your content string like it is described in the wiki
https://github.com/micjahn/ZXing.Net/wiki/Generating-GS1-DataMatrix-and-GS1-Code128-barcodes

[pintureti]

Hello from Spain! I’m using Zxing on vb.net, but I have a question. I want use qr gs1, is it possible? Thanks