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README for libdmtx-net version 0.7.2 - September 4, 2009
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libdmtx-net is a .NET wrapper for libdmtx that was originally
written by Tomas Valenta, currently maintained by Joseph Ferner
and is distributed as part of the libdmtx package.
1. libdmtx-net Installation
-----------------------------------------------------------------
1. Compile the libdmtx solution.
2. Compile the libdmtx.net solution.
3. Add a reference to Libdmtx.Net.dll in you're project. (Make
sure you copy libdmtx.dll into the same directory as your
binaries).
2. Dependencies
-----------------------------------------------------------------
Requires .NET Framework 2.0 (or higher) and C runtime library,
for example Microsoft Visual C++ Runtime.
3. Using
-----------------------------------------------------------------
Using is very similar to the command line utilities dmtxread
and dmtxwrite. This disallows to use the library as smart as
with C API, but saves unmanaged calls from .NET which cost
some overhead.
3.1. Decoding
LibDmtx.DecodeOptions o = new LibDmtx.DecodeOptions();
Bitmap b = new Bitmap(@"bitmap.png");
LibDmtx.DmtxDecoded[] res = LibDmtx.Decode(b, o);
for (uint i = 0; i < res.Length; i++) {
string str = Encoding.ASCII.GetString(res[i].Data).TrimEnd('\0');
Console.WriteLine("Code " + i + ": " + str);
}
3.2. Encoding
LibDmtx.EncodeOptions o = new LibDmtx.EncodeOptions();
byte[] dataToEncode = Encoding.ASCII.GetBytes("Hello World!");
LibDmtx.DmtxEncoded en = LibDmtx.Encode(dataToEncode, o);
pictureBox1.Image = en.bitmap;
3.3. More Information
See the source or the unit tests.
4. VB.NET example for use in ASP.NET page.
-----------------------------------------------------------------
If FileUpload1.HasFile Then
Dim fExtension As String
Dim fFileName As String = FileUpload1.PostedFile.FileName
fExtension = Path.GetExtension(FileUpload1.PostedFile.FileName)
Dim fileBytes(FileUpload1.PostedFile.InputStream.Length) As Byte
FileUpload1.PostedFile.InputStream.Read(fileBytes, 0, fileBytes.Length)
Dim collector As New MemoryStream(fileBytes)
Dim gImage As Bitmap
gImage = Bitmap.FromStream(collector)
Dim bDecode As New Libdmtx.DecodeOptions
bDecode.CodeType = Libdmtx.CodeType.DataMatrix
bDecode.MaxCodes = 1
Dim pDecode As Libdmtx.DmtxDecoded() = Libdmtx.Dmtx.Decode(gImage, bDecode)
Dim cString As String
cString = String.Empty
For Each thing In pDecode
cString = cString & Encoding.ASCII.GetString(thing.Data)
Next
Label1.Text = cString
Label2.Text = pDecode.Length.ToString
End If
5. This Document
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This document is derived from the wiki page located at:
http://libdmtx.wikidot.com/libdmtx-net-wrapper
If you find an error or have additional helpful information,
please edit the wiki directly with your updates.
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