VS 2019 Counting rows with the same date as 1 item.

Hello!

I have a table with a column called: "DGV_Date_Column", it contains the dates of my sale tickets. I've sent these values to a DataGridView1 and I'm trying to display de total amount of tickets in a Label1.Text. I mean all rows with the same date and time belong to a single ticket, so in the image I show 3 tickets total, and I need to display this total in the Label1.Text

this is what my table looks like:


This is my attempt to do it, but no success.


I'll appreciate any help.

Thank you.

Attached Images