private void btnAdd_Click(object sender, EventArgs e)
        {
            frmAddDrawing add = new frmAddDrawing(User, "", "");

            add.ShowDialog();
            btnSearch_Click(sender, e);
        }
 private void btnUpdate_Click(object sender, EventArgs e)
 {
     try
     {
         if (dgvDwr.RowCount > 0)
         {
             string        drawingId = dgvDwr.Rows[dgvDwr.CurrentRow.Index].Cells["dwr_id"].Value.ToString();
             string        modelId   = dgvDwr.Rows[dgvDwr.CurrentRow.Index].Cells["model_id"].Value.ToString();
             frmAddDrawing add       = new frmAddDrawing(User, drawingId, modelId);
             add.ShowDialog();
             btnSearch_Click(sender, e);
         }
         else
         {
             MessageBox.Show("Choose a Drawing", "Note", MessageBoxButtons.OK, MessageBoxIcon.Information);
         }
     }
     catch
     {
         MessageBox.Show("Choose a Drawing", "Note", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
 }