C#创建Excel(.xls和.xlsx)文件的三种方法

生成EXCEL文件是经常需要用到的功能，我们利用一些开源库可以很容易实现这个功能。

方法一：利用excellibrary，http://code.google.com/p/excellibrary/

excellibrary是国人写的开源组件，很容易使用，可惜貌似还不支持.xlsx(Excel 2007)，例子如下：

//Create the data set and table
DataSet ds = new DataSet("New_DataSet");
DataTable dt = new DataTable("New_DataTable");
//Set the locale for each
ds.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;
dt.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;
//Open a DB connection (in this example with OleDB)
OleDbConnection con = new OleDbConnection(dbConnectionString);
con.Open();
//Create a query and fill the data table with the data from the DB
string sql = "SELECT Whatever FROM MyDBTable;";
OleDbCommand cmd = new OleDbCommand(sql, con);
OleDbDataAdapter adptr = new OleDbDataAdapter();
adptr.SelectCommand = cmd;
adptr.Fill(dt);
con.Close();
//Add the table to the data set
ds.Tables.Add(dt);
//Here's the easy part. Create the Excel worksheet from the data set
ExcelLibrary.DataSetHelper.CreateWorkbook("MyExcelFile.xls", ds);

　　

例子二：

//create new xls file
string file = "C:\\newdoc.xls";
Workbook workbook = new Workbook();
Worksheet worksheet = new Worksheet("First Sheet");
worksheet.Cells[, ] = new Cell((short));
worksheet.Cells[, ] = new Cell();
worksheet.Cells[, ] = new Cell((decimal)3.45);
worksheet.Cells[, ] = new Cell("Text string");
worksheet.Cells[, ] = new Cell("Second string");
worksheet.Cells[, ] = new Cell(32764.5, "#,##0.00");
worksheet.Cells[, ] = new Cell(DateTime.Now, @"YYYY\-MM\-DD");
worksheet.Cells.ColumnWidth[, ] = ;
workbook.Worksheets.Add(worksheet);
workbook.Save(file);
// open xls file
Workbook book = Workbook.Load(file);
Worksheet sheet = book.Worksheets[];
// traverse cells
foreach (Pair<Pair<int, int>, Cell> cell in sheet.Cells)
{
dgvCells[cell.Left.Right, cell.Left.Left].Value = cell.Right.Value;
}
// traverse rows by Index
for (int rowIndex = sheet.Cells.FirstRowIndex;
rowIndex <= sheet.Cells.LastRowIndex; rowIndex++)
{
Row row = sheet.Cells.GetRow(rowIndex);
for (int colIndex = row.FirstColIndex;
colIndex <= row.LastColIndex; colIndex++)
{
Cell cell = row.GetCell(colIndex);
}
}

方法二：利用EPPlus,http://epplus.codeplex.com/
EPPlus是一个使用Open Office XML(xlsx)文件格式，能读写Excel 2007/2010 文件的开源组件。
例子如下：

var file = @"Sample.xlsx";
if (File.Exists(file)) File.Delete(file);
using (var excel = new ExcelPackage(new FileInfo(file)))
{
var ws = excel.Workbook.Worksheets.Add("Sheet1");
ws.Cells[1, 1].Value = "Date";
ws.Cells[1, 2].Value = "Price";
ws.Cells[1, 3].Value = "Volume";
var random = new Random();
for (int i = 0; i < 10; i++)
{
ws.Cells[i + 2, 1].Value = DateTime.Today.AddDays(i);
ws.Cells[i + 2, 2].Value = random.NextDouble() * 1e3;
ws.Cells[i + 2, 3].Value = random.Next() / 1e3;
}

ws.Cells[2, 1, 11, 1].Style.Numberformat.Format = "dd/MM/yyyy";
ws.Cells[2, 2, 11, 2].Style.Numberformat.Format = "#,##0.000000";
ws.Cells[2, 3, 11, 3].Style.Numberformat.Format = "#,##0";
ws.Column(1).AutoFit();
ws.Column(2).AutoFit();
ws.Column(3).AutoFit();
excel.Save();
}

　　

例子二：

using OfficeOpenXml;
//指定Templete文档Text.xlsx
FileInfo newFile = new FileInfo("D:" + @"\Test.xlsx");
//开启
using (ExcelPackage pck = new ExcelPackage(newFile))
{
try
{
//设定ExcelWorkBook
ExcelWorkbook workBook = pck.Workbook;
if (workBook != null)
{
if (workBook.Worksheets.Count > 0)
{
//复制Temp这个Sheet同时命名为《清单》
ExcelWorksheet currentWorksheet = workBook.Worksheets.Copy("Temp", "清单");
//可以设定保护Sheet的密码
//currentWorksheet.Protection.SetPassword("1234");
int StartRow = 4;
for (int i = 0; i < tDS.Tables[0].Rows.Count; i++)
{
//Cells[RowIndex,CellIndex]
currentWorksheet.Cells[StartRow + i, 1].Value = Convert.ToString(tDS.Tables[0].Rows[i][0]);
currentWorksheet.Cells[StartRow + i, 2].Value = Convert.ToString(tDS.Tables[0].Rows[i][1]);
currentWorksheet.Cells[StartRow + i, 3].Value = Convert.ToString(tDS.Tables[0].Rows[i][2]);
currentWorksheet.Cells[StartRow + i, 4].Value = Convert.ToString(tDS.Tables[0].Rows[i][3]);
currentWorksheet.Cells[StartRow + i, 5].Value = Convert.ToString(tDS.Tables[0].Rows[i][4]);
currentWorksheet.Cells[StartRow + i, 6].Value = Convert.ToString(tDS.Tables[0].Rows[i][5]);
currentWorksheet.Cells[StartRow + i, 7].Value = Convert.ToString(tDS.Tables[0].Rows[i][6]);
currentWorksheet.Cells[StartRow + i, 8].Value = Convert.ToString(tDS.Tables[0].Rows[i][7]);
currentWorksheet.Cells[StartRow + i, 9].Value = Convert.ToString(tDS.Tables[0].Rows[i][8]);
currentWorksheet.Cells[StartRow + i, 10].Value = Convert.ToString(tDS.Tables[0].Rows[i][9]);
currentWorksheet.Cells[StartRow + i, 11].Value = Convert.ToString(tDS.Tables[0].Rows[i][10]);
currentWorksheet.Cells[StartRow + i, 12].Value = Convert.ToString(tDS.Tables[0].Rows[i][11]);
currentWorksheet.Cells[StartRow + i, 13].Value = Convert.ToString(tDS.Tables[0].Rows[i][12]);
}
//将Temp 这个Sheet删除
workBook.Worksheets.Delete("Temp");
}
}
//存至Text4.xlsx
pck.SaveAs(new FileInfo("H:" + @"\Test4.xlsx"));
}
catch (Exception e)
{
oLogger.Fatal(e.ToString());
}
}

　　

方法三：NPOI http://npoi.codeplex.com/
NPOI无需Office COM组件且不依赖Office，使用NPOI能够帮助开发者在没有安装微软Office的情况下读写Office 97-2003的文件，支持的文件格式包括xls, doc, ppt等。NPOI是构建在POI 3.x版本之上的，它可以在没有安装Office的情况下对Word/Excel文档进行读写操作。
被人称为操作EXCEL的终极方案，例子如下：

//引用
using NPOI.HSSF.UserModel;
using NPOI.HPSF;
using NPOI.POIFS.FileSystem;
using NPOI.SS.UserModel;
//将WorkBook指到我们原本设计好的Templete Book1.xls
using (IWorkbook wb = new HSSFWorkbook(new FileStream("D:/Book1.xls", FileMode.Open)))
{
try
{
//设定要使用的Sheet为第0个Sheet
ISheet TempSheet = wb.GetSheetAt(0);
int StartRow = 4;
//tDS为Query回来的资料
for (int i = 0; i < tDS.Tables[0].Rows.Count; i++)
{
//第一个Row要用Create的
TempSheet.CreateRow(StartRow + i).CreateCell(0).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][0]));
//第二个Row之后直接用Get的
TempSheet.GetRow(StartRow + i).CreateCell(1).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][1]));
TempSheet.GetRow(StartRow + i).CreateCell(2).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][2]));
TempSheet.GetRow(StartRow + i).CreateCell(3).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][3]));
TempSheet.GetRow(StartRow + i).CreateCell(4).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][4]));
TempSheet.GetRow(StartRow + i).CreateCell(5).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][5]));
TempSheet.GetRow(StartRow + i).CreateCell(6).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][6]));
TempSheet.GetRow(StartRow + i).CreateCell(7).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][7]));
TempSheet.GetRow(StartRow + i).CreateCell(8).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][8]));
TempSheet.GetRow(StartRow + i).CreateCell(9).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][9]));
TempSheet.GetRow(StartRow + i).CreateCell(10).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][10]));
TempSheet.GetRow(StartRow + i).CreateCell(11).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][11]));
TempSheet.GetRow(StartRow + i).CreateCell(12).SetCellValue(Convert.ToString(tDS.Tables[0].Rows[i][12]));
}
//将文档写到指定位置
using (FileStream file = new FileStream("H:/Test_NPOI4.xls", FileMode.Create))
{
wb.Write(file);
file.Close();
file.Dispose();
}
}
catch (Exception e)
{
string a = e.ToString();
}
}