运行如下代码时发现弹出Exception from HRESULT: 0x800A03EC异常

        private void ExportExcel(DataTable dt)

        {

            if (dt == null) return;

            Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();

            if (xlApp == null)

            {

                return;

            }

            System.Globalization.CultureInfo CurrentCI = System.Threading.Thread.CurrentThread.CurrentCulture;

            System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");

            Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;

            Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);

            Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];

            Microsoft.Office.Interop.Excel.Range range;

            long totalCount = dt.Rows.Count;

            long rowRead = 0;

            float percent = 0;

            for (int i = 0; i < dt.Columns.Count; i++)

            {

                worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;

                range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1];

                range.Interior.ColorIndex = 15;

                range.Font.Bold = true;

            }

            for (int r = 0; r < dt.Rows.Count; r++)

            {

                for (int i = 0; i < dt.Columns.Count; i++)

                {

                    worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i];

                }

                rowRead++;

                percent = ((float)(100 * rowRead)) / totalCount;

            }

            xlApp.Visible = true;

        }

后Debug到worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i];当数据含有"="后就弹出这个异常，把这名改为worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i].ToString().Replace("=","");后运行正常，特记录下来。