Question

I have been working on something that checks an MySQL Database to check something – however the program stops responding because it is constantly checking the database. Is it possible to have it wait a few seconds to recheck the database? I have tried sleep() but it is giving a strange error:

A call to PInvoke function
‘Game!WindowsApplication1.Form1::Sleep’ has unbalanced the
stack. This is likely because the managed PInvoke signature
does not match the
unmanaged target signature. Check that the calling convention
and parameters of the
PInvoke signature match the target unmanaged signature.

I have been looking into this for quite a while and i am in a predicament. I do need the MySQL databases to be checked very often. I tried making a web browser refresh before checking it again – but it started to lag the application.

Code:

 function updateit()
 ' SQL Code goes here, it succeeds.
 updateit() ' Update it again.
 return true
 end

 updateit()

Answer 1

Try doing your checks from a separate thread. Try dragging a BackgroundWorker onto your form and putting your check in that to make your program more responsive. I’ve never seen that error before though. Is it System.Threading.Thread.Sleep() or something specific to VB?

Looking at your code it looks like you’ve got infinite recursion. That will cause a stackoverflow… try

while(true)
'SQL code
end