c# excel 创建Sheet并绑定DataTable

 #region 变量
        Application xlApp = null;
        Workbooks wbs = null;
        Workbook wb = null;
        private int _rowindex = 0;//全局行索引(使用时加n行)  

        //要导出的表集合  
        private List _tables = new List();
        private string _saveFile = null;
        #endregion

        #region 属性

        ///

        /// 设置EXCEL列数组样式()
        ///

        public static string SetColumns { get; set; }

        #endregion

        #region 构造方法

        public Excel()
        {
        }

        public Excel(System.Data.DataTable table)
        {
            _tables = new List() { table };
        }

        public Excel(List tables, string SaveFile)
        {
            _tables = tables;
            _saveFile = SaveFile;
        }

        #endregion

        //保存Table导入到那个Sheet表(打印时可以判断sheet是否有数据,没有数据则不打印)  
        private Dictionary SheetTable = new Dictionary();

        ///

        /// 导入excel模板
        ///

        public static void ExcelFile(System.Data.DataTable dataTable)
        {
            RegistryKey folders;
            folders = OpenRegistryPath(Registry.CurrentUser, @"\software\microsoft\windows\currentversion\explorer\shell folders");
            // Windows用户我的文档路径
            string personalPath = folders.GetValue("Personal").ToString();

            object misValue = Missing.Value;
            Application exapp = new Application();
            exapp.Workbooks.Open(System.Windows.Forms.Application.StartupPath + @"\DataFile\报表_销售统计.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
            Workbook mybook = exapp.Workbooks[1];
            Worksheet exs = (Worksheet)mybook.Worksheets[1];

            try
            {
                int rowCount = dataTable.Rows.Count;
                int colCount = dataTable.Columns.Count;
                object[,] dataArray = new object[rowCount, colCount];
                for (int i = 0; i < rowCount; i++)
                {
                    for (int j = 0; j < colCount; j++)
                    {
                        dataArray[i, j] = dataTable.Rows[i][j];
                    }
                }

                exs.Range[exapp.Cells[3, 1], exapp.Cells[rowCount, colCount]].Value2 = dataArray;
                mybook.SaveCopyAs(personalPath + @"\报表_销售统计.xls");

            }
            finally
            {
                exapp.Quit();
                GC.Collect();//强行销毁   
                PublicMethod.Kill(exapp);//调用kill当前excel进程
                releaseObject(exs);
                releaseObject(mybook);
                releaseObject(exapp);
            }
        }

        private static RegistryKey OpenRegistryPath(RegistryKey root, string s)
        {
            s = s.Remove(0, 1) + @"\";
            while (s.IndexOf(@"\") != -1)
            {
                root = root.OpenSubKey(s.Substring(0, s.IndexOf(@"\")));
                s = s.Remove(0, s.IndexOf(@"\") + 1);
            }
            return root;
        }

        ///

 
        /// 获取Workbook  
        ///

 
        ///  
        ///  
        public void GetExcelWorkbook()
        {
            if (_tables.Count == 0)
            {
                throw new Exception("Tables集合必须大于零!");
            }

            if (_rowindex < 0)
            {
                _rowindex = 0;
            }
            object misValue = Missing.Value;
            xlApp = new Application();
            xlApp.Visible = false;
            xlApp.DisplayAlerts = false;
            wbs = xlApp.Workbooks;
            wb = wbs.Add(misValue);   //添加一个工作簿  
            //添加Sheet表,新建一个Excel文件时候,一般会默认有3个Sheet表,所以用[table.Count - wb.Sheets.Count]  
            int tabcount = _tables.Count;
            int sheets = wb.Worksheets.Count;  //获取默认Sheet表个数,一般默认3个  
            if (tabcount > sheets)
            {
                wb.Worksheets.Add(misValue, misValue, tabcount - sheets, misValue);
            }

            // 删除多余Sheet表
            //((Microsoft.Office.Interop.Excel.Worksheet)wb.Worksheets[index]).Delete();  
            //写入Excel  
            WriteExcelSheet(wb, _saveFile, misValue, xlApp, wb);

            wb.Close(true, misValue, misValue);

            xlApp.Quit();
            PublicMethod.Kill(xlApp);
            releaseObject(wb);
            releaseObject(xlApp);
        }

        ///

 
        /// 写入Excel的Sheet表  
        ///

 
        ///  
        ///  
        private void WriteExcelSheet(Workbook wb, string SaveFile, object misValue, Application excel, Workbook workBook)
        {
            List SheetNames = GetSheetsName(wb);  //Sheet表名字集合,防止相同名称,出现错误!  
            for (int i = 0; i < _tables.Count; i++)
            {
                System.Data.DataTable table = _tables[i];
                int rows = table.Rows.Count;
                int cols = table.Columns.Count;
                //获取Sheet表  
                Worksheet wsheet = (Worksheet)wb.Worksheets[i + 1];   //wb.Worksheets 所以从1开始  
                //选中表  
                wsheet.Select();
                //设置表名字  
                wsheet.Name = GetCorrectSheetName(SheetNames, table.TableName, (i + 1)); //Name要特别注意  

                //保存DataTable和Sheet表的绑定  
                SheetTable.Add(wsheet.Name, table);
                DataTableToSheet(table, SaveFile, misValue, excel, workBook, wsheet);
                //保存名字  
                //SheetNames.Add(wsheet.Name);
                // SheetNames[i] = wsheet.Name;

            }
            //选中第一个表  
            ((Worksheet)wb.Worksheets[1]).Select();
        }

        ///

 
        /// 获取一个合法Sheet名称  
        ///

 
        ///  
        private string GetCorrectSheetName(List existnames, string tabname, int tabindex)
        {
            string name = String.Empty;
            //是否为空,是否大于31,是否有特殊字符  
            //验证名字是否合法  
            if (!VerifySheetName(tabname))
            {
                tabname = "Table" + tabindex;
            }

            bool isexist = existnames.Exists(n => n.Equals(tabname));  //是否存在  
            if (isexist)
            {
                tabindex++;
                name = GetCorrectSheetName(existnames, "Table" + tabindex, tabindex);
            }
            else
            {
                name = tabname;
            }
            return name;
        }

        ///

 
        /// 判断是否合法  
        ///

 
        private bool VerifySheetName(string sheetname)
        {
            if (string.IsNullOrEmpty(sheetname) || sheetname.Length > 31)
            {
                return false;
            }

            if (sheetname.Contains("\\") || sheetname.Contains("/"))
            {
                return false;
            }

            if (sheetname.Contains(":") || sheetname.Contains("："))
            {
                return false;
            }

            if (sheetname.Contains("?") || sheetname.Contains("？"))
            {
                return false;
            }

            if (sheetname.Contains("[") || sheetname.Contains("]"))
            {
                return false;
            }
            return true;
        }

        ///

 
        /// 获取Workbook中所有Sheet表的名称  
        ///

 
        ///  
        ///  
        private List GetSheetsName(Workbook wb)
        {
            List names = new List();
            foreach (var sheet in wb.Worksheets)
            {
                string name = ((Worksheet)sheet).Name;
                if (!String.IsNullOrEmpty(name))
                {
                    names.Add(name);
                }
            }
            return names;
        }

        ///

        /// 数据库转为excel表格
        ///

        /// 数据库数据
        /// 导出的excel文件
        private void DataTableToSheet(System.Data.DataTable dataTable, string SaveFile, object misValue, Application excel, Workbook workBook, Worksheet workSheet)
        {
            int rowCount = dataTable.Rows.Count;
            int colCount = dataTable.Columns.Count;
            int colIndex = 0;
            //取得标题
            foreach (DataColumn col in dataTable.Columns)
            {
                colIndex++;

                excel.Cells[1, colIndex] = col.ColumnName;
            }
            object[,] dataArray = new object[rowCount, colCount];
            for (int i = 0; i < rowCount; i++)
            {
                for (int j = 0; j < colCount; j++)
                {
                    dataArray[i, j] = "'" + dataTable.Rows[i][j];
                }

            }

            if (rowCount > 0)
                excel.Range["A2"].Resize[rowCount, colCount].Value2 = dataArray;

            excel.Visible = false;

            workBook.SaveAs(SaveFile, XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
            releaseObject(workSheet);
        }


        ///

        /// 数据库转为excel表格
        ///

        /// 数据库数据
        /// 导出的excel文件
        public static void DataTableToExcel(System.Data.DataTable dataTable, string SaveFile)
        {
            Application excel;

            _Workbook workBook;

            _Worksheet workSheet;

            object misValue = System.Reflection.Missing.Value;
            excel = new Application();//new ApplicationClass();

            workBook = excel.Workbooks.Add(misValue);

            workSheet = (_Worksheet)workBook.ActiveSheet;

            //设置单元格样式
            string[] arrary;
            if (!string.IsNullOrEmpty(SetColumns))
            {
                if (SetColumns.Contains(','))
                    arrary = SetColumns.Split(',');
                else
                {
                    arrary = new string[1];
                    arrary[0] = SetColumns;
                }
                for (int i = 0; i < arrary.Length; i++)
                {
                    Range range = null;
                    range = workSheet.Columns.get_Range(arrary[i], misValue).Resize[dataTable.Rows.Count, 1];
                    range.NumberFormatLocal = "#,##0.00";
                }
            }

            int rowIndex = 1;

            int colIndex = 0;

            //取得标题
            foreach (DataColumn col in dataTable.Columns)
            {
                colIndex++;

                excel.Cells[1, colIndex] = col.ColumnName;
            }

            //取得表格中的数据
            foreach (DataRow row in dataTable.Rows)
            {
                rowIndex++;
                colIndex = 0;
                foreach (DataColumn col in dataTable.Columns)
                {
                    colIndex++;
                    excel.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString().Trim();
                }
            }

            excel.Visible = false;

            workBook.SaveAs(SaveFile, XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);

            dataTable = null;

            workBook.Close(true, misValue, misValue);

            excel.Quit();

            PublicMethod.Kill(excel);//调用kill当前excel进程

            releaseObject(workSheet);

            releaseObject(workBook);

            releaseObject(excel);

        }