Each event method has a SPItem Event Properties parameter named properties.
If you wish to modify a property value on the list item during the event, the value should be updated in After Properties property of the properties parameter.
So if anything else is changed the workflow will not start unless the 'approval' value is. Thanks, Check if the two values are not equal to each other, and if the updated value is equal to "approve".
If both are true, start a workflow on the list item programmatically- here are some links to help you with that: coding!
From the settings menu on the calendar choose create view. Name your view after one of the meeting rooms and add filtering criteria as below.
It is also important how do you edit the list item.Recently a simple requirement came up: “Redirect the user to the view-form of an item after he creates a new item”. Redirect(" // Will NOT abort the thread but the redirection is ignored _current Context. The default behavior of Share Point is to redirect the user to the url defined by the // Will abort the thread _current Context.Share Point reads these values from the event parameter and modifies the item accordingly when the actual operation runs (e.g.the actual Add / Update operation for which the Adding / Updating event is being fired).