Check that every mandatory field within every record has a value (the house number and postcode are the most important 
because we need to use these to uniquely identify a property on the database). 

If a record has an update or delete status and is not found on the system then report an error. The user may have changed the 
postcode or the house number (which they should not). 
Advise the user that if they need to update the house number, name or postcode of a property then they must delete ir via the 
property maintenance form via the website and then ADD a new property line to the upload spreadsheet for this property.  

Similarly, should the user fail to delete a record because it is not found then they have probably updated its house number, name 
or postcode, so refer them to the property maintenance page on the website. 

cols = 38
Data.Tables["Rentals"].Rows[7].ItemArray[15]
"Telephone Available"
Data.Tables["Rentals"].Rows[7].ItemArray[7]
"Property Type"
Data.Tables["Rentals"].Rows[7].ItemArray[19]
"Gas included in rent"
Data.Tables["Rentals"].Rows[7].ItemArray[31]
"Telephone"
Data.Tables["Rentals"].Rows[7].ItemArray[29]
"Picture 4"