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：
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//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);
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例子二：
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//create new xls file
string
file =
"C:\\newdoc.xls"
;
Workbook workbook =
new
Workbook();
Worksheet worksheet =
new
Worksheet(
"First Sheet"
);
worksheet.Cells[0, 1] =
new
Cell((
short
)1);
worksheet.Cells[2, 0] =
new
Cell(9999999);
worksheet.Cells[3, 3] =
new
Cell((
decimal
)3.45);
worksheet.Cells[2, 2] =
new
Cell(
"Text string"
);
worksheet.Cells[2, 4] =
new
Cell(
"Second string"
);
worksheet.Cells[4, 0] =
new
Cell(32764.5,
"#,##0.00"
);
worksheet.Cells[5, 1] =
new
Cell(DateTime.Now,
@"YYYY\-MM\-DD"
);
worksheet.Cells.ColumnWidth[0, 1] = 3000;
workbook.Worksheets.Add(worksheet);
workbook.Save(file);
// open xls file
Workbook book = Workbook.Load(file);
Worksheet sheet = book.Worksheets[0];
// traverse cells
foreach
(Pair{
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);
}
}
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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：
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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();
}
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例子二：
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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());
}
}
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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：
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//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();
}
}
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