1 下载Epplus最新版：http://epplus.codeplex.com/
2 在项目中添加引用 EEPULS.dll（测试环境Win7+V2010旗舰）
3 添加using引用
using OfficeOpenXml;
using OfficeOpenXml.Drawing;
using OfficeOpenXml.Drawing.Chart;
using OfficeOpenXml.Style;
4 read Excel文件
readExcel文件到Datatable
private void button2_Click(object sender, EventArgs e)
{
string pfilePath = "";
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "*.xls|*.xlsx";
if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
pfilePath = ofd.FileName;
}
if (string.IsNullOrEmpty(pfilePath))
{
MessageBox.Show("没有选中文件");
return;
}
FileInfo existingFile = new FileInfo(pfilePath);
try
{
ExcelPackage package = new ExcelPackage(existingFile);
int vSheetCount = package.Workbook.Worksheets.Count; //获取总Sheet页
ExcelWorksheet worksheet = package.Workbook.Worksheets[1];//选定 指定页
int maxColumnNum = worksheet.Dimension.End.Column;//最大列
int minColumnNum = worksheet.Dimension.Start.Column;//最小列
int maxRowNum = worksheet.Dimension.End.Row;//最小行
int minRowNum = worksheet.Dimension.Start.Row;//最大行
DataTable vTable = new DataTable();
DataColumn vC;
for (int j = 1; j <= maxColumnNum; j++)
{
vC = new DataColumn("A_" + j, typeof(string));
vTable.Columns.Add(vC);
}
if (maxRowNum > 200)
{
maxRowNum = 200;
}
for (int n = 1; n <= maxRowNum; n++)
{
DataRow vRow = vTable.NewRow();
for (int m = 1; m <= maxColumnNum; m++)
{
vRow[m - 1] = worksheet.Cells[n, m].Value;
}
vTable.Rows.Add(vRow);
}
this.dataGridView1.DataSource = vTable;
}
catch (Exception vErr)
{
MessageBox.Show(vErr.Message);
}
}
5 write Excel文件
5.1 直接生成EXcel示例
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private
void
button1_Click(
object
sender, EventArgs e)
{
OfficeOpenXml.ExcelPackage ep =
new
OfficeOpenXml.ExcelPackage();
OfficeOpenXml.ExcelWorkbook wb = ep.Workbook;
OfficeOpenXml.ExcelWorksheet ws = wb.Worksheets.Add(
"我的工作表"
);
//配置文件属性
wb.Properties.Category =
"类别"
;
wb.Properties.Author =
"作者"
;
wb.Properties.Comments =
"备注"
;
wb.Properties.Company =
"公司"
;
wb.Properties.Keywords =
"关键字"
;
wb.Properties.Manager =
"管理者"
;
wb.Properties.Status =
"内容状态"
;
wb.Properties.Subject =
"主题"
;
wb.Properties.Title =
"标题"
;
wb.Properties.LastModifiedBy =
"最后一次保存者"
;
//写数据
ws.Cells[1, 1].Value =
"Hello"
;
ws.Column(1).Width=40;
//修改列宽
ws.Cells[
"B1"
].Value =
"World"
;
ws.Cells[3, 3, 3, 5].Merge =
true
;
ws.Cells[3, 3].Value =
"Cells[3, 3, 3, 5]合并"
;
ws.Cells[
"A4:D5"
].Merge =
true
;
ws.Cells[
"A4"
].Value =
"Cells[\"A4:D5\"]合并"
;
SaveFileDialog sfd =
new
SaveFileDialog();
sfd.Filter =
"*.xls|*.xlsx"
;
if
(sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
FileInfo file =
new
FileInfo(sfd.FileName);
ep.File = file;
ep.Save();
MessageBox.Show(
"保存成功"
);
}
else
{
MessageBox.Show(
"取消保存"
);
}
}
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5.2 从DataGridView导出至Excel
将DataGridView显示内容导出至Excel（DataTable只需小改动即可）
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OfficeOpenXml.ExcelPackage ep = new OfficeOpenXml.ExcelPackage();
OfficeOpenXml.ExcelWorkbook wb = ep.Workbook;
OfficeOpenXml.ExcelWorksheet ws = wb.Worksheets.Add("我的工作表");
//配置文件属性，可以不注释掉
//wb.Properties.Category = "类别";
//wb.Properties.Author = "作者";
//wb.Properties.Comments = "备注";
//wb.Properties.Company = "公司";
//wb.Properties.Keywords = "关键字";
//wb.Properties.Manager = "管理者";
//wb.Properties.Status = "内容状态";
//wb.Properties.Subject = "主题";
//wb.Properties.Title = "标题";
//wb.Properties.LastModifiedBy = "最后一次保存者";
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
for (int j = 1; j < dataGridView1.Columns.Count; j++)
{
if (dataGridView1.Columns[j-1].Visible == true)
{
if (dataGridView1.Rows[i].Cells[j-1].Value == null)
{
ws.Cells[i+1, j].Value = " ";
}
else
{
string rowstr = dataGridView1.Rows[i].Cells[j-1].Value.ToString();
if (rowstr.IndexOf("\r\n") > 0)
rowstr = rowstr.Replace("\r\n", " ");
if (rowstr.IndexOf("\t") > 0)
rowstr = rowstr.Replace("\t", " ");
ws.Cells[i+1, j].Value = rowstr;
}
}
}
}
SaveFileDialog sfd = new SaveFileDialog();
sfd.Filter = "*.xls|*.xlsx";
if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
FileInfo file = new FileInfo(sfd.FileName);
ep.File = file;
ep.Save();
MessageBox.Show("保存成功");
}
else
{
MessageBox.Show("取消保存");
}
/// <summary> /// 读取sheet 内的数据进入实体 /// </summary> /// <param name="worksheet"></param> /// <returns></returns> public List<Person> GetSheetValues(string filepath) { FileInfo file = new FileInfo(filepath); if (file != null) { using (ExcelPackage package = new ExcelPackage(file)) { ExcelWorksheet worksheet = package.Workbook.Worksheets[0]; //获取表格的列数和行数 int rowCount = worksheet.Dimension.Rows; int ColCount = worksheet.Dimension.Columns; var persons = new List<Person>(); for (int row = 1; row <= rowCount; row++) { Person person = new Person(); person.Name = worksheet.Cells[row, 1].Value.ToString(); person.Sex = worksheet.Cells[row, 2].Value.ToString(); persons.Add(person); } return persons; } } return null; }
上述代码大部分来源网络，只进行过小改动，下面是原文和资料地址：
http://blog.csdn.net/jimmy2248/article/details/8363697
http://blog.csdn.net/zhoufoxcn/article/details/14112473
http://www.cnblogs.com/liudeyun/p/3535740.html
http://blog.163.com/china__xuhua/blog/static/19972316920136335721285/
http://www.cnblogs.com/xiaotan68/archive/2008/03/20/1114796.html