C# 几十万级数据导出Excel，及Excel各种操作

先上导出代码/// <summary>        /// 导出速度最快        /// </summary>        /// <param name="list"><列名，数据></param>        /// <param name="filepath"></param>        /// <returns></returns>        public bool NewExport(List<DictionaryEntry> list, string filepath)        {            bool bSuccess = true;            Microsoft.Office.Interop.Excel.Application appexcel = new Microsoft.Office.Interop.Excel.Application();            System.Reflection.Missing miss = System.Reflection.Missing.Value;            appexcel = new Microsoft.Office.Interop.Excel.Application();            Microsoft.Office.Interop.Excel.Workbook workbookdata = null;            Microsoft.Office.Interop.Excel.Worksheet worksheetdata = null;            Microsoft.Office.Interop.Excel.Range rangedata;            workbookdata = appexcel.Workbooks.Add();            //设置对象不可见            appexcel.Visible = false;            appexcel.DisplayAlerts = false;            try            {                foreach (var lv in list)                {                    var keys = lv.Key as List<string>;                    var values = lv.Value as List<IList<object>>;                    worksheetdata = (Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets.Add(miss, workbookdata.ActiveSheet);                    for (int i = 0; i < keys.Count-1; i++)                    {                        //给工作表赋名称                        worksheetdata.Name = keys[0];//列名的第一个数据位表名                        worksheetdata.Cells[1, i + 1] = keys[i+1];                    }                    //因为第一行已经写了表头，所以所有数据都应该从a2开始                    rangedata = worksheetdata.get_Range("a2", miss);                    Microsoft.Office.Interop.Excel.Range xlrang = null;                    //irowcount为实际行数，最大行                    int irowcount = values.Count;                    int iparstedrow = 0, icurrsize = 0;                    //ieachsize为每次写行的数值，可以自己设置                    int ieachsize = 10000;                    //icolumnaccount为实际列数，最大列数                    int icolumnaccount = keys.Count-1;                    //在内存中声明一个ieachsize×icolumnaccount的数组，ieachsize是每次最大存储的行数，icolumnaccount就是存储的实际列数                    object[,] objval = new object[ieachsize, icolumnaccount];                    icurrsize = ieachsize;                    while (iparstedrow < irowcount)                    {                        if ((irowcount - iparstedrow) < ieachsize)                            icurrsize = irowcount - iparstedrow;                        //用for循环给数组赋值                        for (int i = 0; i < icurrsize; i++)                        {                            for (int j = 0; j < icolumnaccount; j++)                            {                                var v = values[i + iparstedrow][j];                                objval[i, j] = v != null ? v.ToString() : "";                            }                        }                        string X = "A" + ((int)(iparstedrow + 2)).ToString();                        string col = "";                        if (icolumnaccount <= 26)                        {                            col = ((char)('A' + icolumnaccount - 1)).ToString() + ((int)(iparstedrow + icurrsize + 1)).ToString();                        }                        else                        {                            col = ((char)('A' + (icolumnaccount / 26 - 1))).ToString() + ((char)('A' + (icolumnaccount % 26 - 1))).ToString() + ((int)(iparstedrow + icurrsize + 1)).ToString();                        }                        xlrang = worksheetdata.get_Range(X, col);                        xlrang.NumberFormat = "@";                        // 调用range的value2属性，把内存中的值赋给excel                        xlrang.Value2 = objval;                        iparstedrow = iparstedrow + icurrsize;                    }                }                ((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets["Sheet1"]).Delete();                ((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets["Sheet2"]).Delete();                ((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets["Sheet3"]).Delete();                //保存工作表                workbookdata.SaveAs(filepath, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);                workbookdata.Close(false, miss, miss);                appexcel.Workbooks.Close();                appexcel.Quit();                System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookdata);                System.Runtime.InteropServices.Marshal.ReleaseComObject(appexcel.Workbooks);                System.Runtime.InteropServices.Marshal.ReleaseComObject(appexcel);                GC.Collect();            }            catch (Exception ex)            {                ErrorMsg = ex.Message;                bSuccess = false;            }            finally            {                if (appexcel != null)                {                    ExcelImportHelper.KillSpecialExcel(appexcel);                }            }            return bSuccess;        }

各种excel 操作

range.NumberFormatLocal = "@";     //设置单元格格式为文本     range = (Range)worksheet.get_Range("A1", "E1");     //获取Excel多个单元格区域：本例做为Excel表头     range.Merge(0);     //单元格合并动作     worksheet.Cells[1, 1] = "Excel单元格赋值";     //Excel单元格赋值     range.Font.Size = 15;     //设置字体大小     range.Font.Underline=true;     //设置字体是否有下划线     range.Font.Name="黑体";       设置字体的种类     range.HorizontalAlignment=XlHAlign.xlHAlignCenter;     //设置字体在单元格内的对其方式     range.ColumnWidth=15;     //设置单元格的宽度     range.Cells.Interior.Color=System.Drawing.Color.FromArgb(255,204,153).ToArgb();     //设置单元格的背景色     range.Borders.LineStyle=1;     //设置单元格边框的粗细     range.BorderAround(XlLineStyle.xlContinuous,XlBorderWeight.xlThick,XlColorIndex.xlColorIndexAutomatic,System.Drawing.Color.Black.ToArgb());     //给单元格加边框     range.Borders.get_Item(Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeTop).LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlLineStyleNone; //设置单元格上边框为无边框     range.EntireColumn.AutoFit();     //自动调整列宽     Range.HorizontalAlignment= xlCenter;     // 文本水平居中方式     Range.VerticalAlignment= xlCenter     //文本垂直居中方式     Range.WrapText=true;     //文本自动换行     Range.Interior.ColorIndex=39;     //填充颜色为淡紫色     Range.Font.Color=clBlue;     //字体颜色     xlsApp.DisplayAlerts=false;   //对Excel的操作 不弹出提示信息ApplicationClass xlsApp = new ApplicationClass(); // 1. 创建Excel应用程序对象的一个实例，相当于我们从开始菜单打开Excel应用程序。if (xlsApp == null){//对此实例进行验证，如果为null则表示运行此代码的机器可能未安装Excel}1. 打开现有的Excel文件Workbook workbook = xlsApp.Workbooks.Open(excelFilePath, 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);Worksheet mySheet = workbook.Sheets[1] as Worksheet; //第一个sheet页mySheet.Name = "testsheet"; //这里修改sheet名称2.复制sheet页mySheet.Copy(Type.Missing, workbook.Sheets[1]); //复制mySheet成一个新的sheet页，复制完后的名称是mySheet页名称后加一个(2)，这里就是testsheet(2)，复制完后，Worksheet的数量增加一个注意 这里Copy方法的两个参数，指是的复制出来新的sheet页是在指定sheet页的前面还是后面，上面的例子就是指复制的sheet页在第一个sheet页的后面。3.删除sheet页    xlsApp.DisplayAlerts = false; //如果想删除某个sheet页，首先要将此项设为fasle。(xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Delete();4.选中sheet页    (xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Select(Type.Missing); //选中某个sheet页5.另存excel文件workbook.Saved = true;workbook.SaveCopyAs(filepath);6.释放excel资源    workbook.Close(true, Type.Missing, Type.Missing);workbook = null;xlsApp.Quit();xlsApp = null;