Hi Nik,
Revit didn't expose the API to read data from the schedule in Revit 2013 and the previous versions.
In Revit 2013, schedule's data can be exported via ViewSchedule.Export() method.
Here is the signature of this method.
public void Export(
string folder,
string name,
ViewScheduleExportOptions options)
Via this method, all data can be exported to a txt file. This file can be opened in Excel, view it conveniently in Excel.
And you app can also access this txt file to get specific data.
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Joe Ye
Contractor
Developer Technical Services
Autodesk Developer Network