将datagridview中的选定行发送到电子邮件

I'm currently working through a problem I've had for awhile with a C# Winform app. I have a datagrid with the information populated via a query. Everything all runs a-ok and the user of the winform can "tick" the relevant rows that will be emailed elsewhere. The issue I have is that currently, all rows will be included in the email, whether ticked or not. I would like only the ticked rows to be sent to the email, the rest ignored. I feel like I am close, my code is below:I'm currently working through a problem I've ha