C#完成几十万级数据导出Excel及Excel种种操纵实例代码详解【C#.Net教程】,C#，导出，Excel

本篇文章重要引见了C#完成几十万级数据导出Excel及Excel种种操纵实例，这里整理了细致的代码,有须要的小伙伴能够参考下。

先上导出代码

  /// <summary> 
      /// 导出速率最快 
      /// </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++) 
            { 
              //给事情表赋称号 
              worksheetdata.Name = keys[0];//列名的第一个数据位表名 
              worksheetdata.Cells[1, i + 1] = keys[i+1]; 
            } 
   
            //由于第一行已写了表头，所以一切数据都应当从a2最先 
            rangedata = worksheetdata.get_Range("a2", miss); 
            Microsoft.Office.Interop.Excel.Range xlrang = null; 
   
            //irowcount为现实行数，最大行 
            int irowcount = values.Count; 
            int iparstedrow = 0, icurrsize = 0; 
   
            //ieachsize为每次写行的数值，能够本身设置 
            int ieachsize = 10000; 
   
            //icolumnaccount为现实列数，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就是存储的现实列数 
            object[,] objval = new object[ieachsize, icolumnaccount]; 
            icurrsize = ieachsize; 
   
            while (iparstedrow < irowcount) 
            { 
              if ((irowcount - iparstedrow) < ieachsize) 
                icurrsize = irowcount - iparstedrow; 
   
              //用for轮回给数组赋值 
              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 = "@"; 
              // 挪用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(); 
          //保留事情表 
          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; 
      }

range.NumberFormatLocal = "@";   //设置单元格花样为文本   
  
range = (Range)worksheet.get_Range("A1", "E1");   //猎取Excel多个单元格地区：本例做为Excel表头   
  
range.Merge(0);   //单元格兼并行动   
  
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;   //设置字体是不是有下划线   
  
range.Font.Name="黑体";    设置字体的品种   
  
range.HorizontalAlignment=XlHAlign.xlHAlignCenter;   //设置字体在单元格内的对其体式格局   
  
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;   // 文本程度居中体式格局   
  
Range.VerticalAlignment= xlCenter   //文本垂直居中体式格局   
  
Range.WrapText=true;   //文本自动换行   
  
Range.Interior.ColorIndex=39;   //添补色彩为淡紫色   
  
Range.Font.Color=clBlue;   //字体色彩   
  
xlsApp.DisplayAlerts=false;  //对Excel的操纵 不弹出提醒信息 
ApplicationClass xlsApp = new ApplicationClass(); // 1. 竖立Excel应用程序对象的一个实例，相当于我们从最先菜单翻开Excel应用程序。 
if (xlsApp == null) 
{ 
//对此实例举行考证，假如为null则示意运转此代码的机械能够未装置Excel 
}

1. 翻开现有的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"; //这里修正sheet称号

2.复制sheet页

mySheet.Copy(Type.Missing, workbook.Sheets[1]);
//复制mySheet成一个新的sheet页，复制完后的称号是mySheet页称号后加一个(2)，这里就是testsheet(2)，复制完后，Worksheet的数目增添一个

注重 这里Copy要领的两个参数，指是的复制出来新的sheet页是在指定sheet页的前面照样背面，上面的例子就是指复制的sheet页在第一个sheet页的背面。

3.删除sheet页

xlsApp.DisplayAlerts = false; //假如想删除某个sheet页，起首要将此项设为fasle。 
(xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Delete();

4.选中sheet页

复制代码 代码以下:

(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.开释excel资本

workbook.Close(true, Type.Missing, Type.Missing); 
workbook = null; 
xlsApp.Quit(); 
xlsApp = null;

要领2：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Office.Interop.Excel;
using System.Data;

namespace ExcelTest
{
  public class ExcelUtil
  {
    System.Data.DataTable table11 = new System.Data.DataTable();

    public void ExportToExcel(System.Data.DataTable table, string saveFileName)
    {

      bool fileSaved = false;

      //ExcelApp xlApp = new ExcelApp();

      Application xlApp = new Application();

      if (xlApp == null)
      {
        return;
      }

      Workbooks workbooks = xlApp.Workbooks;
      Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);
      Worksheet worksheet = (Worksheet)workbook.Worksheets[1];//获得sheet1

      long rows = table.Rows.Count;

      /*下边解释的两行代码当数据行数凌驾行时，出现非常：非常来自HRESULT:0x800A03EC。由于：Excel 2003每一个sheet只支撑最大行数据

      //Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count+2, gridview.Columns.View.VisibleColumns.Count+1]);

      //fchR.Value2 = datas;*/

      if (rows > 65535)
      {

        long pageRows = 60000;//定义每页显现的行数,行数必需小于

        int scount = (int)(rows / pageRows);

        if (scount * pageRows < table.Rows.Count)//当总行数不被pageRows整除时，经由四舍五入能够页数不准
        {
          scount = scount + 1;
        }

        for (int sc = 1; sc <= scount; sc++)
        {
          if (sc > 1)
          {

            object missing = System.Reflection.Missing.Value;

            worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.Add(

            missing, missing, missing, missing);//增加一个sheet

          }

          else
          {
            worksheet = (Worksheet)workbook.Worksheets[sc];//获得sheet1
          }

          string[,] datas = new string[pageRows + 1, table.Columns.Count+ 1];

for (int i = 0; i < table.Columns.Count; i++) //写入字段
          {
            datas[0, i] = table.Columns[i].Caption;
          }

          Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, table.Columns.Count]);
          range.Interior.ColorIndex = 15;//15代表灰色
          range.Font.Bold = true;
          range.Font.Size = 9;

          int init = int.Parse(((sc - 1) * pageRows).ToString());
          int r = 0;
          int index = 0;
          int result;

          if (pageRows * sc >= table.Rows.Count)
          {
            result = table.Rows.Count;
          }
          else
          {
            result = int.Parse((pageRows * sc).ToString());
          }
          for (r = init; r < result; r++)
          {
            index = index + 1;
            for (int i = 0; i < table.Columns.Count; i++)
            {
              if (table.Columns[i].DataType == typeof(string) || table.Columns[i].DataType == typeof(Decimal) || table.Columns[i].DataType == typeof(DateTime))
              {
                object obj = table.Rows[r][table.Columns[i].ColumnName];
                datas[index, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加单引号是为了防备自动转化花样

              }

            }
          }

          Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 2, table.Columns.Count + 1]);

          fchR.Value2 = datas;
          worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。

          range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, table.Columns.Count]);

          //15代表灰色

          range.Font.Size = 9;
          range.RowHeight = 14.25;
          range.Borders.LineStyle = 1;
          range.HorizontalAlignment = 1;

        }

      }

      else
      {

        string[,] datas = new string[table.Rows.Count + 2, table.Columns.Count + 1];
        for (int i = 0; i < table.Columns.Count; i++) //写入字段     
        {
          datas[0, i] = table.Columns[i].Caption;
        }

        Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, table.Columns.Count]);
        range.Interior.ColorIndex = 15;//15代表灰色
        range.Font.Bold = true;
        range.Font.Size = 9;

        int r = 0;
        for (r = 0; r < table.Rows.Count; r++)
        {
          for (int i = 0; i < table.Columns.Count; i++)
          {
            if (table.Columns[i].DataType == typeof(string) || table.Columns[i].DataType == typeof(Decimal) || table.Columns[i].DataType == typeof(DateTime))
            {
              object obj = table.Rows[r][table.Columns[i].ColumnName];
              datas[r + 1, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加单引号是为了防备自动转化花样

            }

          }

          //System.Windows.Forms.Application.DoEvents();

}

        Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count + 2, table.Columns.Count + 1]);

        fchR.Value2 = datas;
        
        worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。

        range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count + 1, table.Columns.Count]);

        //15代表灰色

        range.Font.Size = 9;
        range.RowHeight = 14.25;
        range.Borders.LineStyle = 1;
        range.HorizontalAlignment = 1;
      }

      if (saveFileName != "")
      {
        try
        {
          workbook.Saved = true;
          workbook.SaveCopyAs(saveFileName);
          fileSaved = true;

        }

        catch (Exception ex)
        {
          fileSaved = false;
        }

      }

      else
      {

        fileSaved = false;

      }

      xlApp.Quit();

      GC.Collect();//强行烧毁 
  
    }
  }
}

要领3：

先去官网：http://www.ki4.cn/下载须要引入dll（能够挑选.net2.0或许.net4.0的dll），然后在网站中增加援用。

导出代码：

NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
NPOI.SS.UserModel.ISheet sheet = book.CreateSheet("test_01");

// 第一列
NPOI.SS.UserModel.IRow row = sheet.CreateRow(0);
row.CreateCell(0).SetCellValue("第一列第一行");

// 第二列
NPOI.SS.UserModel.IRow row2 = sheet.CreateRow(1);
row2.CreateCell(0).SetCellValue("第二列第一行");

// ...

// 写入到客户端 
System.IO.MemoryStream ms = new System.IO.MemoryStream();
book.Write(ms);
Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xls", DateTime.Now.ToString("yyyyMMddHHmmssfff")));
Response.BinaryWrite(ms.ToArray());
book = null;
ms.Close();
ms.Dispose();

导入代码：

HSSFWorkbook hssfworkbook; 
#region 
public DataTable ImportExcelFile(string filePath) 
{ 
  #region//初始化信息 
  try 
  { 
    using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read)) 
    { 
      hssfworkbook = new HSSFWorkbook(file); 
    } 
  } 
  catch (Exception e) 
  { 
    throw e; 
  } 
  #endregion 
 
  NPOI.SS.UserModel.Sheet sheet = hssfworkbook.GetSheetAt(0); 
  System.Collections.IEnumerator rows = sheet.GetRowEnumerator(); 
  DataTable dt = new DataTable(); 
  for (int j = 0; j < (sheet.GetRow(0).LastCellNum); j++) 
  { 
    dt.Columns.Add(Convert.ToChar(((int)'A') + j).ToString()); 
  } 
  while (rows.MoveNext()) 
  { 
    HSSFRow row = (HSSFRow)rows.Current; 
    DataRow dr = dt.NewRow(); 
    for (int i = 0; i < row.LastCellNum; i++) 
    { 
      NPOI.SS.UserModel.Cell cell = row.GetCell(i); 
      if (cell == null) 
      { 
        dr[i] = null; 
      } 
      else 
      { 
        dr[i] = cell.ToString(); 
      } 
    } 
    dt.Rows.Add(dr); 
  } 
  return dt; 
} 
#endregion

用法：

起首竖立一个空缺的事情簿用作测试，并在个中竖立空缺事情表，在表中竖立空缺行，在行中竖立单元格，并填入内容：

//竖立空缺事情簿
IWorkbook workbook = new HSSFWorkbook();
//在事情簿中：竖立空缺事情表
ISheet sheet = workbook.CreateSheet();
//在事情表中：竖立行，参数为行号，从0计
IRow row = sheet.CreateRow(0);
//在行中：竖立单元格，参数为列号，从0计
ICell cell = row.CreateCell(0);
//设置单元格内容
cell.SetCellValue("练习审定表");

设置单元格款式：设置单元格款式时须要注重，务必竖立一个新的款式对象举行设置，不然会将事情表一切单元格的款式一同设置，它们应当同享的是一个款式对象：

ICellStyle style = workbook.CreateCellStyle();
//设置单元格的款式：程度对齐居中
style.Alignment = HorizontalAlignment.CENTER;
//新建一个字体款式对象
IFont font = workbook.CreateFont();
//设置字体加粗款式
font.Boldweight = short.MaxValue;
//运用SetFont要领将字体款式增加到单元格款式中 
style.SetFont(font);
//将新的款式赋给单元格
cell.CellStyle = style;

设置单元格宽高：

设置单元格的高度现实是设置其地点行高，所以要在单元格地点行上设置行高，行高设置数值好像是像素点的1/20，所以*20以便到达设置结果；

设置单元格的宽度现实上是设置其地点列宽，所以要在单元格地点列上设置（列的设置在事情表上），宽度数值好像是字符的1/256，所以*256以便到达设置结果。

//设置单元格的高度
row.Height = 30 * 20;
//设置单元格的宽度
sheet.SetColumnWidth(0, 30 * 256);

兼并单元格：兼并单元格现实上是声明一个地区，该地区中的单元格将举行兼并，兼并后的内容与款式以该地区最左上角的单元格为准。

//设置一个兼并单元格地区，运用上下左右定义CellRangeAddress地区
//CellRangeAddress四个参数为：肇端行，完毕行，肇端列，完毕列
sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, 10));

增加公式：运用Cell的CellFormula来设置公式，是一个字符串，公式前不须要加=号。

//经由过程Cell的CellFormula向单元格中写入公式
//注：直接写公式内容即可，不须要在最前加'='
ICell cell2 = sheet.CreateRow(1).CreateCell(0);
cell2.CellFormula = "HYPERLINK(\"测试图片.jpg\",\"测试图片.jpg\")";

将事情簿写入文件检察结果：

//将事情簿写入文件
using (FileStream fs = new FileStream("生成结果.xls", FileMode.Create, FileAccess.Write))
{
 workbook.Write(fs);
}

以上就是C#完成几十万级数据导出Excel及Excel种种操纵实例代码详解的内容，更多相关内容请关注ki4网（www.ki4.cn）！