C# WinApp Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound.

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'testDBDataSet.Emp' table. You can move, or remove it, as needed.
            this.empTableAdapter.Fill(this.testDBDataSet.Emp);
        }

       private void button2_Click(object sender, EventArgs e)
        {
         DataRow dr;
         dr = this.testDBDataSet.Emp.NewRow();
         dr[0] = "a";
         dr[1] = "a";
         dr[2] = "a";
         this.testDBDataSet.Emp.Rows.Add(dr);
        }

for (int i = 1; i < 21; i++)
            {
                tblOne2UpLinkDataGridView.Rows.Add(เพิ่มข้อมูลใน DataGridView );
            }

for (int i = 1; i < 21; i++)
            {
                tblOne2UpLinkDataGridView.Rows.Add(0 - i, "sfddgfd " + i, "srfsfaeteyaad" + i);
            }

public static System.Data.DataTable GetTableForm(string _SQL, string strConn)
      {

          System.Data.DataSet ds = new System.Data.DataSet();

                  System.Data.OleDb.OleDbConnection conn2 = new System.Data.OleDb.OleDbConnection(strConn);
                  conn2.Open();
                  System.Data.OleDb.OleDbDataAdapter adapter2 = new System.Data.OleDb.OleDbDataAdapter(_SQL, conn2);
                  adapter2.Fill(ds);

          return ds.Tables[0];

      }

tblOne2UpLinkDataGridView.DataSource = GetTableForm("SELECT PK, Link, File FROM tblOne2UpLink", "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\\One2UpLinkFile.accdb");

BindingSource bs = new BindingSource();
            bs.DataSource = _Database.GetTableForm("SELECT PK, Link, File FROM tblOne2UpLink", "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\\One2UpLinkFile.accdb");
            tblOne2UpLinkDataGridView.DataSource = bs;

this.tblOne2UpLinkTableAdapter.Fill(this.one2UpLinkFileDataSet.tblOne2UpLink);
           for (int i = 1; i < 21; i++)
            {
                DataRow dr;
                dr = this.one2UpLinkFileDataSet.tblOne2UpLink.NewRow();
                dr[0] = 0-i;
                dr[1] = "TOR " + i;
                dr[2] = "Test " + i ;
                this.one2UpLinkFileDataSet.tblOne2UpLink.Rows.Add(dr);
            }