C#使用模版创建execl文件

                    //模版位置

                   string staFile = "D:\\test\\测试报表.xls";

                    System.Reflection.Missing miss = System.Reflection.Missing.Value;

                    Excel.ApplicationClass m_objExcel = new Excel.ApplicationClass();

                    m_objExcel.Visible = false;

                    Excel.Workbooks m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks;

                    Excel.Workbook m_objBook = (Excel.Workbook)(m_objBooks.Add(miss));

                    m_objBook = m_objExcel.Workbooks.Open(staFile, miss, miss, miss, miss, miss, miss, miss, miss, miss, miss, miss, miss);

                    Excel.Worksheet m_objSheet = (Excel.Worksheet)m_objBook.Sheets[1];

                    //保存execl位置   为12列

                    for (int num = 1; num < 12; num++)

                    {

                        string str = "A";

                        byte[] array = new byte[1];

                        array[0] = (byte)(Convert.ToInt32(num + 64)); //ASCII码强制转换二进制

                        str = Convert.ToString(System.Text.Encoding.ASCII.GetString(array));

                        //写入数据

                        for (int j = 2; j < tableconut + 2; j++)

                        {

                            string pos = str + j.ToString();

                            //写入更改

                            Excel.Range er = m_objSheet.get_Range((object)pos, System.Reflection.Missing.Value);

                            if (dt.Rows[j - 2][num - 1] == DBNull.Value || dt.Rows[j - 3][num - 1].ToString() == null)

                                er.Value2 = "null";

                            else

                                er.Value2 = dt.Rows[j - 2][num - 1].ToString();

                            //自适应宽度

                            er.EntireColumn.AutoFit();

                            System.Runtime.InteropServices.Marshal.ReleaseComObject(er);

                        }

                    }

                    string datatime = DateTime.Now.ToString("yyyy-MM-dd");

                    // 保存文件

                    string saveFile = "D:\\test\\save\\测试报表";

                    m_objBook.SaveAs(saveFile + datatime.ToString() + ".xls", miss, miss, miss, miss, miss, Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss, miss, miss);

                    m_objBook.Close(false, miss, miss);

                    m_objBooks.Close();

                    m_objExcel.Quit();

                    //System.Runtime.InteropServices.Marshal.ReleaseComObject(er);

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objSheet);

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objBook);

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objBooks);

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objExcel);

                    GC.Collect();