.NET DataGridView: Remove "current row" black triangle

Triangle problem , it's simple ,put

dgv_Products.Rows[xval].Selected = true;
dgv_Products.CurrentCell  = dgv_Products.Rows[xval].Cells[0];

that is make current cell property to the cell zero of current selected row.( Tested working for dgv_Products.MultiSelect = false ; )

Set RowHeadersVisible to false.

A very simple solution is to set the row height to 16 pixels or less. This disables all icons in the row header cell.

dataGridView1.RowTemplate.Height = 16;

• If you want to keep the row headers rather than hide them, then you can use the cell padding to push the triangle out of sight:

  this.dataGridView1.RowHeadersDefaultCellStyle.Padding = 
      new Padding(this.dataGridView1.RowHeadersWidth);
  

• If you are using row header text and want keep that visible you need to use some custom painting - thankfully very simple. After the above code, simply attach to the RowPostPaint event as shown below:

  dataGridView1.RowPostPaint += 
      new DataGridViewRowPostPaintEventHandler(dataGridView1_RowPostPaint);
  

  And in the RowPostPaint method:

  void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
  {
      object o = dataGridView1.Rows[e.RowIndex].HeaderCell.Value;
  
      e.Graphics.DrawString(
          o != null ? o.ToString() : "",
          dataGridView1.Font, 
          Brushes.Black, 
          new PointF((float)e.RowBounds.Left + 2, (float)e.RowBounds.Top + 4));
  }
  

  As Dan Neely points out the use of Brushes.Black above will overwrite any existing changes, so it is better for the brush to use:

  new SolidBrush(dataGridView1.RowHeadersDefaultCellStyle.ForeColor)