I'm working on a project for my Visual Basic class, and I keep getting this error.(Value Null, Paramter Name: Source). It highlights the whole query so I can't figure out specifically where the problem is. I'll attach a screenshot of my code or something to show you. My teacher isn't able to help, probably because he doesn't know anything about Visual Basic so any help is appreciated.
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Print Screen of the Code: http://prntscr.com/15320w