C# 如何根据另一列中的值计算gridcontrol-devexpress中的百分比

我在devexpress网格控件中有数据。我试图总结表格中的项目

图为：

进度结果是比较网格控件中的两个数据行。 如何根据ISFINISH中的值获取PROGRESS列中的百分比值

以下是我尝试过的代码：

private void bandedGridView1_CustomDrawCell(object sender, DevExpress.XtraGrid.Views.Base.RowCellCustomDrawEventArgs e)
{
    if (e.Column.FieldName == "PROGRESS") //PROGRESS
    {
        //int markVal = Convert.ToInt32(bandedGridView1.GetRowCellValue(e.RowHandle, "ISFINISH"));
        string val = Convert.ToString(bandedGridView1.GetRowCellValue(e.RowHandle, "TANGGALBACA"));
        if(val !="")
        {
            //GET SUM OF ISFINISH COLUMN BY KATEGORI
            GridGroupSummaryItem item = new GridGroupSummaryItem();
            GridSummaryItem item1 = bandedGridView1.GroupSummary.Add();
            item.FieldName = "ISFINISH";
            item.SummaryType = DevExpress.Data.SummaryItemType.Sum;
            item.Tag = 1;
            item.DisplayFormat = "{0:n0}"; //sum
            var sum = item.SummaryValue.ToString(); //bandedGridColumn7 is column by fieldname "ISFINISH"

            //GET COUNT OF ISFINISH COLUMN BY KATEGORI
            GridSummaryItem item2 = bandedGridView1.GroupSummary.Add();
            item2.FieldName = "ISFINISH";
            item2.SummaryType = DevExpress.Data.SummaryItemType.Count;
            item2.Tag = 1;
            item2.DisplayFormat = "{0}"; //count
            var count = item2.SummaryValue.ToString(); //bandedGridColumn7 is column by fieldname "ISFINISH"

            //GET RESULT AND CONVERT TO PERCENTAGE BETWEEN SUM AND COUNT OF INSFINISH COLUMN
            int hasil = (Convert.ToInt32(sum) / Convert.ToInt32(count)) * 100;
            e.DisplayText = hasil.ToString(); //HERE IS THE RESULT THAT I WANNA BE PERCENTAGE IN PROGRESS COLUMN
        }
    }
}

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但是，它不起作用，需要帮助，谢谢

请包含与此问题相关的任何代码。@dcreight我已经包含了代码，。。很抱歉，我来晚了，。。你能帮忙吗？谢谢