c#如何生成Excel(.xls和.xlsx)文件

原創

zhy_me

2020-02-21 02:41

在工作中經常遇到需要用c#生成Excel文件(.xls和.xlsx格式),完全免費開源的ExcelLibrary是一個不錯的選擇。

ExcelLibrary項目的地址爲:

https://code.google.com/p/excellibrary/

ExcelLibrary源碼下載地址:

https://code.google.com/p/excellibrary/downloads/list

ExcelLibrary提供了一個基於本地.NET應用程序的解決方案，可以用來新建，讀取和修改Excel文件而不需要使用COM或者OLEDB。現在已經支持.xls文件格式，.xlsx(Excel 2007)也即將被支持。

ExcelLibrary官方示例代碼:

//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<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);

     }

 }

ExcelLibrary示例代碼二(從數據庫中獲取數據然後創建Excel文件):

//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);