public static DataTable ParseExcel(ExcelOptions options)
{
DataTable data = new DataTable();
try
{
//根据文件流创建excel数据结构
IWorkbook workbook;
if (options.FileName.EndsWith(".xls"))
{
workbook = new HSSFWorkbook(options.Stream);
}
else
{
workbook = WorkbookFactory.Create(options.Stream);
}
//excel工作表
ISheet sheet = null;
//标题行
int titleRow = options.TitleRow;
//数据起始行
int startRow = options.StartRow;
//如果有指定工作表名称
if (!string.IsNullOrEmpty(options.SheetName))
{
sheet = workbook.GetSheet(options.SheetName);
//如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
if (sheet is null)
{
sheet = workbook.GetSheetAt(0);
}
}
else
{
//如果没有指定的sheetName，则尝试获取第一个sheet
sheet = workbook.GetSheetAt(0);
}
if (sheet != null)
{
IRow firstRow = sheet.GetRow(titleRow);
//一行最后一个cell的编号 即总的列数
int cellCount = firstRow.LastCellNum;
//TitleRow > -1 说明有标题行
if (options.TitleRow > -1)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
ICell cell = firstRow.GetCell(i);
if (cell != null)
{
//excel的列名
string cellValue = cell.StringCellValue;
if (!string.IsNullOrWhiteSpace(cellValue))
{
//使用实体对应的名称
string tableName = options.Mappers.Where(e => e.Index == i).Select(e => e.TableName).FirstOrDefault();
DataColumn column = new DataColumn(tableName);
data.Columns.Add(column);
}
}
}
}
//最后一列的标号
int rowCount = sheet.LastRowNum;
for (int i = startRow; i <= rowCount; ++i)
{
IRow row = sheet.GetRow(i);
//如果当前行为null，或者第一个单元格的值为空，默认认为是结束
if (row is null ||
row.Cells.Count == 0
)
{
break;
}
DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
ICell cells = row.GetCell(j);
//没有数据的单元格都默认是null
if (cells != null)
{
switch (cells.CellType)
{
case CellType.Numeric:
if (DateUtil.IsCellDateFormatted(cells))
{
dataRow[j] = cells.DateCellValue.CastToDateTime();
}
else
{
dataRow[j] = cells.NumericCellValue;
}
break;
case CellType.Unknown:
case CellType.String:
case CellType.Formula:
case CellType.Blank:
case CellType.Error:
dataRow[j] = cells.StringCellValue.CastToString();
break;
case CellType.Boolean:
dataRow[j] = cells.BooleanCellValue;
break;
default:
dataRow[j] = cells.CastToString();
break;
}
}
}
data.Rows.Add(dataRow);
}
}
}
catch (Exception ex)
{
throw ex;
}
Console.WriteLine("Excel解析成功");
return(data);
}