当GridCell被修改后加一个修改标记的方法_dev 改了一行数据然后表格所有数据都被标记modified-优快云博客

本文链接：https://blog.youkuaiyun.com/JerryChou/article/details/5892338

本文介绍了一种在数据发生变化时记录这些变化的方法，并详细解释了如何通过自定义绘图事件来高亮显示已修改的数据行。这种方法适用于需要跟踪数据变动的应用场景。

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1.record the modification:

private List<string> m_lstValueModify = new List<string>();

dt.ColumnChanged += new DataColumnChangeEventHandler(dt_ColumnChanged);

        void dt_ColumnChanged(object sender, DataColumnChangeEventArgs e)
        {
            string fieldName = e.Column.ColumnName;
            if (string.Compare(fieldName, "Check", true) != 0)
            {
                string strKey = string.Format("{0}_{1}", fieldName, e.Row["AutoGen"]);
                if (!m_lstValueModify.Contains(strKey))
                {
                    m_lstValueModify.Add(strKey);
                }
            }
        }

2.Implement draw event:

        private void m_gridView_CustomDrawCell(object sender, DevExpress.XtraGrid.Views.Base.RowCellCustomDrawEventArgs e)
        {
            if (e.RowHandle >= 0)
            {
                if (string.Compare(e.Column.FieldName, "Check", true) != 0)
                {
                    DataRowView drv = m_gridViewHolding.GetRow(e.RowHandle) as DataRowView;
                    if (drv != null)
                    {
                        string strKey = string.Format("{0}_{1}", e.Column.FieldName, drv.Row["AutoGen"]);
                        if (m_lstValueModify.Contains(strKey))
                        {
                            Rectangle r = e.Bounds;
                            int flagSize = 4;
                            PointF[] points = new PointF[] { new PointF(r.X, r.Y), new PointF(r.X + flagSize, r.Y), new PointF(r.X, r.Y + flagSize) };
                            e.Graphics.FillPolygon(Brushes.Red, points);
                        }
                    }
                }
            }
        }