用NPOI完成公司任务(主要就是导入导出操作)
注意要先添加程序集的引用
![](https://images0.cnblogs.com/blog2015/612317/201507/271458448609213.png)
导出到excel:
public override IWorkbook writeExecl(string filePath, DataTable dt)
{
if (File.Exists(filePath))
{
File.Delete(filePath);
}
IWorkbook wk = new XSSFWorkbook(); ;
//创建一个名称为data的表
ISheet tb = wk.CreateSheet("data");
//表头
IRow row1 = tb.CreateRow(0);
int k = 0;
foreach (DataColumn dc in dt.Columns)
{
ICell cell1 = row1.CreateCell(k);
cell1.SetCellValue(getChinaName(dc.ColumnName));
k = k + 1;
}
//表体
for (int i = 0; i < dt.Rows.Count; i++)
{
IRow row = tb.CreateRow(i + 1);
for (int j = 0; j < dt.Columns.Count; j++)
{
if (j == 3)
{
ICell cell = row.CreateCell(j);
string value = dt.Rows[i][j].ToString();
cell.SetCellValue(tranSchoolType(value));
}
else
{
ICell cell = row.CreateCell(j);
string value = dt.Rows[i][j].ToString();
cell.SetCellValue(value);
}
}
}
string uploadPath = HttpContext.Current.Server.MapPath(filePath);
//打开一个xls文件,如果没有则自行创建
//如果存在myxls.xls文件则在创建是不要打开该文件!
using (FileStream fs = File.OpenWrite(uploadPath))
{
//向打开的这个xls文件中写入mySheet表并保存。
wk.Write(fs);
}
}
是用excel2003还是excel2007可以用下面这个方法:
static IWorkbook isExcelType(string filePath)
{
IWorkbook wk = null;
FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
if (filePath.IndexOf(".xlsx") > 0) // 2007版本
wk = new XSSFWorkbook(fs);
else if (filePath.IndexOf(".xls") > 0) // 2003版本
wk = new HSSFWorkbook(fs);
fs.Close();
return wk;
}
从excel读取数据:
List<Dictionary<string, string>> readExcel(string filePath) { IWorkbook wk = null; wk = isExcelType(filePath); ISheet sheet = wk.GetSheetAt(0); List<string> names = new List<string>();//LastRowNum 是当前表的总行数
for (int j = 1; j <= sheet.LastRowNum; j++)
{ for (int j = 1; j <= sheet.LastRowNum; j++)
{
//读取当前行数据
IRow row = sheet.GetRow(j);
if (row != null)
{
//LastCellNum 是当前行的总列数
for (int k = 0; k <= row.LastCellNum; k++)
{
//当前表格
ICell cell = row.GetCell(k);
if (cell != null)
{
string name = cell.ToString();
names.Add(name);
}
}
}
}
List<Dictionary<string, string>> lists = new List<Dictionary<string, string>>();
return lists;
}
好了,以上就简单的完成导入导出了!