将数据填充到已有的EXECL模板中

导出execl网上一大堆，最近遇到将数据导出到已有的execl模板中，具体到某行列，动态加载数据。

添加 Microsoft.Office.Interop.Excel 引用     

/// <summary>
        /// DataGridView 导出到execl模板中
        /// </summary>
        /// <param name="fileName">execl模板路径</param>
        /// <param name="dgv">数据源</param>
        /// <param name="index">多种模板情况下 通过判断不同的模板 不需要可删</param>
        /// <param name="C_AGENCYNAME">exec文件名  不需要可删</param>
        /// <returns></returns>
        public string mainaa(string fileName, DataGridView dgv, int index, string C_AGENCYNAME)
        {

            //string fileName = @"d:/模板文件.xls";
            string savePath = "";
            Microsoft.Office.Interop.Excel.Application app = null;
            Microsoft.Office.Interop.Excel.Workbooks wbs = null;
            Microsoft.Office.Interop.Excel.Workbook wb = null;
            Microsoft.Office.Interop.Excel.Worksheet s = null;

            //用与计算不同模板的合计
            float countsg = 0;
            float countsh = 0;
            float countzh = 0;
            float countfw = 0;
            float countws = 0;
            try
            {
                app = new Microsoft.Office.Interop.Excel.Application();
                app.DisplayAlerts = false;
                wbs = app.Workbooks;
               //读取模板
                wb = wbs.Open(fileName, Type.Missing, Type.Missing, Type.Missing,
                    Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows,
                    Type.Missing, Type.Missing, Type.Missing, Type.Missing,
                    Type.Missing, Type.Missing, Type.Missing);
                s = (Microsoft.Office.Interop.Excel.Worksheet)wb.Worksheets[1];
                Microsoft.Office.Interop.Excel.Range rangeMonth;
                // 假设用模板1 中是从第18行开始写，写入6列   
                if (index == 1)
                {
                    //从第1行开始
                    rangeMonth = s.get_Range("A1");
                    //设置7,8,9,17行 四行将要写如的数据
                    rangeMonth.Cells[7, 1] = "主题：" + C_AGENCYNAME + "手续费确认函";
                    rangeMonth.Cells[8, 1] = "统计日期：" + DateTime.Now.Year.ToString() + "年" + DateTime.Now.Month.ToString() + "月";
                    rangeMonth.Cells[9, 1] = C_AGENCYNAME + ":";
                    rangeMonth.Cells[17, 2] = C_AGENCYNAME;
                    //设置模板1 之后的表格数据 从第19行开始写
                    rangeMonth = s.get_Range("A19");

                }
                else if (index == 2)
                {
                    rangeMonth = s.get_Range("A3");
                }
                else
                {
                    rangeMonth = s.get_Range("A1");
                    rangeMonth.Cells[6, 1] = "收件人：" + C_AGENCYNAME;
                    rangeMonth.Cells[11, 1] = "主题：" + C_AGENCYNAME + "信诚基金尾随佣金确认函";
                    rangeMonth.Cells[13, 1] = C_AGENCYNAME + ":";
                    rangeMonth = s.get_Range("A19");

                }
              
                System.Windows.Forms.Clipboard.SetDataObject(dgv.Columns[0].HeaderText);
              
                //生成字段名称   
                int row = 0;
                for (int i = 0; i < dgv.ColumnCount; i++)
                {
                    rangeMonth.Cells[1 , i + 1 + row] = dgv.Columns[i].HeaderText;
                    if(index==3)
                    {
                        row += 2;
                    }
                }
                //填充数据   
                for (int i = 0; i < dgv.RowCount - 1; i++)
                {//控制行
                    
                    //基金手续费 合计 累加
                    if (index == 1)
                    {
                        countsg += float.Parse(dgv[2, i].Value.ToString());
                        countsh += float.Parse(dgv[3, i].Value.ToString());
                        countzh += float.Parse(dgv[4, i].Value.ToString());
                        countfw += float.Parse(dgv[5, i].Value.ToString());
                    }
                    for (int j = 0; j < dgv.ColumnCount; j++)//控制列
                    {
                     
                        if (dgv[j, i].ValueType == typeof(string))
                        {
                            rangeMonth.Cells[i + 2, j + 1] = "'" + dgv[j, i].Value.ToString();
                        }
                        else
                        {

                           int rows = 0;
                            if(index==3)
                            {
                                rows = 2;
                            }
                            rangeMonth.Cells[i + 2, j + 1 + rows] = dgv[j, i].Value.ToString();
                           
                        }
                        // count += float.Parse(dgv[4, j + 1].Value.ToString());
                     
                    }
                    if (index == 3)
                    {
                        countws += float.Parse(dgv[1, i].Value.ToString());
                    }
                }
                rangeMonth.Cells[dgv.RowCount + 1, 1] = "合计";
                if (index == 1)//基金手续费合计
                {
                    rangeMonth.Cells[dgv.RowCount + 1, 3] = countsg.ToString();
                    rangeMonth.Cells[dgv.RowCount + 1, 4] = countsh.ToString();
                    rangeMonth.Cells[dgv.RowCount + 1, 5] = countzh.ToString();
                    rangeMonth.Cells[dgv.RowCount + 1, 6] = countfw.ToString();
                    rangeMonth.EntireColumn.AutoFit(); //自动调整列宽
                    rangeMonth.EntireRow.AutoFit(); //自动设置行高
                }
                if (index == 3)
                {
                    rangeMonth.Cells[dgv.RowCount + 1,4] = countws.ToString();
                    rangeMonth.Cells[dgv.RowCount +2, 4] = "公司";
                    rangeMonth.Cells[dgv.RowCount +3, 4] = DateTime.Now.Year.ToString()+"年"+DateTime.Now.Month.ToString()+"月"+DateTime.Now.Day.ToString()+"日";
                }
                //循环最后一列添加背景颜色

                int rowNum;
                if (index == 3)
                {
                     rowNum = 4;
                }
                else
                {
                    rowNum = dgv.ColumnCount;
                }
                for (int i = 1; i <= rowNum; i++)
                {
                    rangeMonth.Cells[dgv.RowCount + 1, i].Interior.Color = Color.FromArgb(220, 230, 241);
                    rangeMonth.Cells[dgv.RowCount + 1, i].RowHeight = 20.25;
                    rangeMonth.Cells[dgv.RowCount + 1, i].Font.Name = "宋体";//设置字体   
                    rangeMonth.Cells[dgv.RowCount + 1, i].Font.Size = 16;//字体大小   
                    rangeMonth.Cells[dgv.RowCount + 1, i].Font.Bold = true;//加粗显示   
                }
                s.Paste(rangeMonth, false);


            }
            catch (Exception ex)
            {

                throw ex;
            }
            finally
            {
                try
                {

                    // E:CodeFEEFEEExeclAndPdfExecl手续费模板.xlsx
                    int num = fileName.Length;
                    string[] execlnamestr = fileName.Split('\');
                    string ExeclName = DateTime.Now.Year.ToString() + "年" + DateTime.Now.Month.ToString()
                        + "月" + C_AGENCYNAME + execlnamestr[execlnamestr.Length - 1];
                    //获取路径
                    string s1 = System.AppDomain.CurrentDomain.BaseDirectory;
                    string q = s1.Substring(0, s1.Length - 15);
                    //设置存放execl 的路径
                    savePath = System.IO.Path.Combine(q, "ExeclAndPdf\SaveExecl\" + ExeclName).ToString();
                    wb.SaveAs(savePath);
                    if (wb != null)
                        wb.Close(true, Type.Missing, false);
                    if (wbs != null)
                        wbs.Close();
                    if (app != null)
                        app.Quit();
                    wb = null;
                    wbs = null;
                    app = null;
                }
                catch
                {
                }

                GC.Collect();
                #region 强行杀死最近打开的Excel进程
                System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL");
                System.DateTime startTime = new DateTime();
                int m, killID = 0;
                for (m = 0; m < excelProc.Length; m++)
                {
                    if (startTime < excelProc[m].StartTime)
                    {
                        startTime = excelProc[m].StartTime;
                        killID = m;
                    }
                }
                if (excelProc[killID].HasExited == false)
                {
                    excelProc[killID].Kill();
                }
                #endregion
            }
            return savePath;
        }