C# How to assign certain columns of a datagridview with certain columns of a datatable that is loaded with sqlserver data

Hi:

I have a datagridview that i'm trying to populate with a datatable that was filled with values from sql server.  There are 8 columns in the datagridview with two of the columns having checkboxes.  When I put in my code,

if (dt.Rows.Count > 0 && dt != null)
{
                       
   dataGridView.DataSource = dt;
                       
}

I get nothing.  Before I had the checkboxes, I had no problem with loading the data.
How do you assign the datatable columns to the proper column of the datagridview?

Also, I created my datagridview in the program _Load part of my code.  Should I create the columns there as well, if the data is not loaded until a certain button is clicked later on?

column 1 is a checkboxcolumn
column 2 is an ID number
column 3 is a Holiday name
column 4 is Day of week
column 5 is Month
column 6 is Day
column 7 is the year
column 8 is another checkboxcolumn

The datagridview columns are shown below.  Right after Naming the first and last columns, I add a Checkbox to it.

dataGridView.Columns[0].Name = "Holiday Approval";
AddCheckBoxForDataGridView(dataGridView, "Holiday Approval");
dataGridView.Columns[1].Name = "Holiday ID";
dataGridView.Columns[2].Name = "Holiday";
dataGridView.Columns[3].Name = "Day of Week";
dataGridView.Columns[4].Name = "Month";
dataGridView.Columns[5].Name = "Day";
dataGridView.Columns[6].Name = "Year";
dataGridView.Columns[7].Name = "Delete";
AddCheckBoxForDataGridView(dataGridView, "Delete");

Thank you very much for your time.

Sincerely,

Bosco