本篇文章主要介紹了C#實現數十萬級資料導出Excel及Excel各種操作實例，這裡整理了詳細的程式碼,有需要的小夥伴可以參考下。
先匯出程式碼
/// <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;
}
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
}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.複製sheet頁
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
#
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();
複製程式碼
程式碼如下：
(xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Select( Type.Missing); //勾選某個sheet頁
workbook.Saved = true; workbook.SaveCopyAs(filepath);
6.釋放excel資源
workbook.Close(true, Type.Missing, Type.Missing); workbook = null; xlsApp.Quit(); xlsApp = null;
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];//取得sheet1
long rows = table.Rows.Count;
/*下边注释的两行代码当数据行数超过行时，出现异常：异常来自HRESULT:0x800A03EC。因为：Excel 2003每个sheet只支持最大行数据
//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;//定义每页显示的行数,行数必须小于
int scount = (int)(rows / pageRows);
if (scount * pageRows < table.Rows.Count)//当总行数不被pageRows整除时，经过四舍五入可能页数不准
{
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);//添加一个sheet
}
else
{
worksheet = (Worksheet)workbook.Worksheets[sc];//取得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止自动转化格式
}
}
}
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止自动转化格式
}
}
//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();//强行销毁
}
}
}#方法3：
先去官網：http://www.php.cn/下載需要引入dll（可選擇.net2.0或.net4.0的dll），然後在網站中加入引用。
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();##
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：
首先建立一個空白的工作簿作為測試，並在其中建立空白工作表，在表中建立空白行，在行中建立單元格，並填入內容：
//建立空白工作簿
IWorkbook workbook = new HSSFWorkbook();
//在工作簿中：建立空白工作表
ISheet sheet = workbook.CreateSheet();
//在工作表中：建立行，参数为行号，从0计
IRow row = sheet.CreateRow(0);
//在行中：建立单元格，参数为列号，从0计
ICell cell = row.CreateCell(0);
//设置单元格内容
cell.SetCellValue("实习鉴定表");
設定單元格樣式：設定單元格樣式時需要注意，務必建立一個新的樣式物件進行設置，否則會將工作表所有單元格的樣式一同設置，它們應該共享的是一個樣式物件：
ICellStyle style = workbook.CreateCellStyle(); //设置单元格的样式：水平对齐居中 style.Alignment = HorizontalAlignment.CENTER; //新建一个字体样式对象 IFont font = workbook.CreateFont(); //设置字体加粗样式 font.Boldweight = short.MaxValue; //使用SetFont方法将字体样式添加到单元格样式中 style.SetFont(font); //将新的样式赋给单元格 cell.CellStyle = style;
設定儲存格寬高：
設定儲存格的高度實際上是設定其所在行高，所以要在儲存格所在行上設定行高，行高設定數值好像是像素點的1/20，所以*20以便達到設定效果；
設定單元格的寬度其實是設定其所在列寬，所以要在儲存格所在列上設定（列的設定在工作表上），寬度數值好像是字元的1/256，所以*256以便達到設定效果。
//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);
//设置一个合并单元格区域，使用上下左右定义CellRangeAddress区域 //CellRangeAddress四个参数为：起始行，结束行，起始列，结束列 sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, 10));
//通过Cell的CellFormula向单元格中写入公式 //注：直接写公式内容即可，不需要在最前加'=' ICell cell2 = sheet.CreateRow(1).CreateCell(0); cell2.CellFormula = "HYPERLINK(\"测试图片.jpg\",\"测试图片.jpg\")";
//将工作簿写入文件
using (FileStream fs = new FileStream("生成效果.xls", FileMode.Create, FileAccess.Write))
{
workbook.Write(fs);
}
