Disable the events of datagridview?

You can done it as:

Declare a public variable as
public int flag=0;

Then in your Add new button click event

{
 flag=1;
}

in Your grid view events

{
if(flag!=1)
{
  //do your event click stuff here
}
}

Then set flag=0 after new record is saved

If if this seems your answer kind to inform me..