Useful applications and code snippets (C#, VB.NET)

This text introduces possible solutions for some special problems, which are associated into groups. There are some application snippets for image processing in the first group. In the second one some database problems are described and illustrated with code snippets. The third group shows some special spatial database questions focused on Postgis. There are downloadable complete programs from the previously mentioned topics. If you click a certain link, a special page will be shown with detailed description of the selected topic.

Image processing

• Bitmap structure in memory
• Fast image handling: Image to byte array, byte array to bitmap
• Simple image processing tasks (grayscale conversion, inverting colors, histogram equalisation, colour separation)
• Reading and displaying satellite images (bil files)
• Reading and displaying digital elevation modells (ddm files)
• Some filter methods (median filter, Laplace filter)

Database programming

• Connecting and displaying database content (SQL server, Postgres, MySql)
• Editing data tables
• Reading and displaying an xlsx file
• Reading, displaying and editing mdb files

Spatial database programming in Postgis

• Using pgAdmin
• Import ESRI shape file into Postgis
• Some spatial data manipulation acts in Postgres/PostGis
• View spatial data by SharpMap
• Sharpmap demo for handling spatial data in Postgis

Open source spatial tools

• Using GMap.NET
• Map Provider demo

Download complete programs

• Filter program (in C#)
• Program for bil and ddm handling (in C#)
• Complete program for lst to MIF conversion
• Sharpmap demo in VB.NET
• Mdb file viewer
• Exif reader