ATML1671Translator.forms.ATMLSignalMappingForm.mappedSignalAttributes_DragDrop C# (CSharp) Method

        private void mappedSignalAttributes_DragDrop( object sender, DragEventArgs e )
        {
            var dscreen = new Point( e.X, e.Y );
            Point dclient = mappedSignalAttributes.PointToClient( dscreen );
            DataGridView.HitTestInfo hit = mappedSignalAttributes.HitTest( dclient.X, dclient.Y );
            if (hit.Type == DataGridViewHitTestType.Cell)
            {
                DataGridViewCell cell = mappedSignalAttributes.Rows[hit.RowIndex].Cells[hit.ColumnIndex];
                var oldText = cell.Value as string;
                var bean = mappedSignalAttributes.Rows[hit.RowIndex].DataBoundItem as SourceSignalAttributeMapBean;
                if (bean != null)
                {
                    string data = e.Data.GetData(DataFormats.Text).ToString();
                    string[] parts = data.Split('|');
                    bean.targetName = parts[1];
                    mappedSignalAttributes.InvalidateRow( hit.RowIndex );
                    mappedSignalAttributes.Update();
                    cell.Style.ForeColor = bean.targetName.Equals(oldText) ? Color.Black : Color.Blue;
                }
            }
        }