/// <summary>
/// 将excel中的数据导入到DataTable中
/// </summary>
/// <param name="sheetName">excel工作薄sheet的名称</param>
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
/// <returns>返回的DataTable</returns>
public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn)
{
ISheet sheet = null;
DataTable data = new DataTable();
int startRow = 0;
NpoiDataType[] ColumnDataType = null;
try
{
using (FileStream stream = new FileStream(@fileName, FileMode.Open, FileAccess.Read))
{
workbook = WorkbookFactory.Create(stream);//使用接口，自动识别excel2003/2007格式
if (sheetName != null)
{
sheet = workbook.GetSheet(sheetName);
}
else
{
sheet = workbook.GetSheetAt(0);
}
if (sheet != null)
{
IRow firstRow = sheet.GetRow(0);
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
if (isFirstRowColumn)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
DataColumn column = new DataColumn(firstRow.GetCell(i).StringCellValue);
data.Columns.Add(column);
}
startRow = sheet.FirstRowNum + 1;
}
else
{
startRow = sheet.FirstRowNum;
}
//最后一列的标号
int rowCount = sheet.LastRowNum;
for (int i = startRow; i <= rowCount; ++i)
{
IRow row = sheet.GetRow(i);
if (row == null)
{
continue; //没有数据的行默认是null
}
if (ColumnDataType == null)
{
ColumnDataType = new NpoiDataType[cellCount];
for (int j = 0; j < cellCount; j++)
{
ICell hs = row.GetCell(j);
if (hs != null)
{
ColumnDataType[j] = GetCellDataType(hs);
}
}
}
DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
ICell hs = row.GetCell(j);
if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
{
if (hs.CellType == CellType.Numeric && HSSFDateUtil.IsCellDateFormatted(hs))
{
dataRow[j] = HSSFDateUtil.GetJavaDate(hs.NumericCellValue).ToString("HH:mm:ss");
}
else
{
dataRow[j] = hs;
}
//dataRow[j] = row.GetCell(j).ToString();
}
//dataRow[j] = GetCellData(ColumnDataType[j], row, j);
}
data.Rows.Add(dataRow);
}
}
}
return(data);
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
return(null);
}
}