How to access a Datatable value from a class to form

Question

I am new to c#. I have a class called "DBConnection" and a function called "getTransportDate()"

 

Basically, I just want to get the Datatable value from a class and display it a form datagrid view. How to can I achieved this ?

 

What I've done so far:

 

On button click 

private void btnTransport_Click(object sender, EventArgs e){            DBConnection.getTransportData();}

My DBConnection Class function

public DataTable TDataTable = new DataTable();        public SqlDataAdapter TDataAdapter = new SqlDataAdapter();

public void getTransportData()
{
using (SqlCommand cmd = new SqlCommand(@"
SElECT * FROM IRFormTransport
",dbconn))
{
cmd.ExecuteNonQuery();
TDataAdapter.SelectCommand = cmd;
TDataTable.Clear();
TDataAdapter.Fill(TDataTable);
}
}

 

My ReportList form

DBConnection DBConnection = new DBConnection();
private void ReportList_Load(object sender, EventArgs e)
{
   ReportGrid.DataSource = DBConnection.TDataTable;
}

How can I achieved that ? Thanks.