Exercise: Code validation for a DataGridView

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Category ==> Visual Basic  (45 exercises)
Topic ==> Reacting to DataGridView events  (3 exercises)
Level ==> Average difficulty
Course ==> WinForms using VB
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If you haven't already done so in this project, create a data source for the Mortgage Access database in the folder shown above.

Create a form called frmApplicant, and within this create a DataGridView to show mortgage applicants from the Person table:

Visual Basic 2010 exercise - Reacting to DataGridView events (image 1)

The DataGridView, with an alternate row style

Add validation such that when the user enters an invalid amount the application displays an error message, and the user can not leave the cell without correcting the error:

Visual Basic 2010 exercise - Reacting to DataGridView events (image 2)

LOTS is not a valid amount!

If you have time, add code to display a suitable value for the ErrorText property of the current row if the mortgage type id is not an integer between 1 and 5:

Visual Basic 2010 exercise - Reacting to DataGridView events (image 3)

should appear if you enter a mortgage type id of 7, for example, as here

Pat yourself on the back, and close down any open forms.

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