how to build datasource

You're question is too vague. Which part of this are you stuck on? Post the code you have tried and tell us what errors it has. If you don't even know where to start, you should probably do some research first. Google "vb.net gridview" and read some articles so you can ask more detailed questions. You can create a DataSet object and add DataTables to it that you manually define. You could research those. Or you can pull data with SQL from a Database. We can help you with that too if you tell us what database you are using. Basically, please post more info.