C# 将excel导入到datatable
将excel导入到datatable ,并修改列名
///
/// 将excel导入到datatable
///
/// Stream文件流
/// 第一行是否是列名
/// 是否替换表头
/// 返回datatable
public static DataTable ExcelToDataTable(this Stream fs, bool isColumnName = true, Dictionary list = null, bool isReplace = false)
{
DataTable dataTable = null;
DataColumn column = null;
DataRow dataRow = null;
IWorkbook workbook = null;
ISheet sheet = null;
IRow row = null;
ICell cell = null;
int startRow = 0;
try
{
workbook = new HSSFWorkbook(fs);
if (workbook != null)
{
sheet = workbook.GetSheetAt(0);//读取第一个sheet，当然也可以循环读取每个sheet
dataTable = new DataTable();
if (sheet != null)
{
int rowCount = sheet.LastRowNum;//总行数
if (rowCount > 0)
{
IRow firstRow = sheet.GetRow(0);//第一行
int cellCount = firstRow.LastCellNum;//列数
//构建datatable的列
if (isColumnName)
{
startRow = 1;//如果第一行是列名，则从第二行开始读取
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
cell = firstRow.GetCell(i);
if (cell != null)
{
if (cell.StringCellValue != null)
{
column = new DataColumn(cell.StringCellValue);
dataTable.Columns.Add(column);
}
}
}
}
else
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
column = new DataColumn("column" + (i + 1));
dataTable.Columns.Add(column);
}
}
//填充行
for (int i = startRow; i <= rowCount; ++i)
{
row = sheet.GetRow(i);
if (row == null) continue;
dataRow = dataTable.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
cell = row.GetCell(j);
if (cell == null)
{
dataRow[j] = "";
}
else
{
//CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,)
switch (cell.CellType)
{
case CellType.Blank:
dataRow[j] = "";
break;
case CellType.Numeric:
short format = cell.CellStyle.DataFormat;
//对时间格式（2015.12.5、2015/12/5、2015-12-5等）的处理
if (format == 14 || format == 31 || format == 57 || format == 58)
dataRow[j] = cell.DateCellValue;
else
dataRow[j] = cell.NumericCellValue;
break;
case CellType.String:
dataRow[j] = cell.StringCellValue;
break;
}
}
}
dataTable.Rows.Add(dataRow);
}
}
}
}
if (isReplace)
{
if (dataTable != null)
{
if (list != null)
{
//循环datatable
for (int i = 0; i < dataTable.Columns.Count; i++)
{
//获取datatable的标头
var s = dataTable.Columns[i].ColumnName;
foreach (var item1 in list)
{
//判断标头与key是否相等
if (s.Equals(item1.Key.ToString().Trim()))
{
//相等替换掉原来的标头
dataTable.Columns[i].ColumnName = item1.Value.ToString().Trim();
}
}
}
}
}
}
return dataTable;
}
catch (Exception)
{
if (fs != null)
{
fs.Close();
}
return null;
}
}
调用
var list = new Dictionary();
list.Add("ID", "TradeAccountId");
list.Add("简介", "Intro");
list.Add("昵称1", "Nickname");
list.Add("限制人数", "SubscribeLimit");
list.Add("模式", "SubscribeMode");
list.Add("收益率", "ProfitRate");
list.Add("收益", "ProfitLossAmount");
list.Add("头像", "Img");
list.Add("平台名称", "Name");
list.Add("用户昵称", "UserNickname");
FileStream fs = new FileStream(@"C:\Users\Administrator\Desktop\Test\Test\bin\Debug\Export\2021-04-27-14-46-36.xls", FileMode.Open);
var dataTable2 = fs.ExcelToDataTable(true, list, true);
MVC上传 excel 用法也是一样的
[Route("ReadExcel")]
public ActionResult ReadExcel()
{
var dataTable= new DataTable();
try
{
// 获取请求文件数据
HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
dataTable= files[0].InputStream.ExcelToList();
}
catch (Exception ex)
{
throw ex;
}
return Json(null, JsonRequestBehavior.AllowGet);
}
