常用的方式的有两种:
1. 通过 Microsoft.Jet.OLEDB.4.0 或 Microsoft.ACE.OLEDB.12.0
Microsoft.ACE.OLEDB.12.0 需要安装 AccessDatatbaseEngine
public DataTable ExcelToDataTable(string strExcelFileName, string strSheetName)
{
string path = Server.MapPath(".")+"\\Common\\"+strExcelFileName;
string conn1 = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path +
";Extended Properties=Excel 8.0;";
string conn2 = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path +
";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1'";
string strExcel = string.Format("select * from [{0}$]", strSheetName);
DataSet ds = new DataSet();
using (OleDbConnection conn = new OleDbConnection(conn2))
{
conn.Open();
OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, conn);
adapter.Fill(ds, strSheetName);
conn.Close();
return ds.Tables[strSheetName];
}
}
//调用方式: DataTable dt = ExcelToDataTable("Report.xls","list");
2.通过 NPOI 2.1.1
public DataTable ExcelToDataTable(string strFileName, int sheetIndex = )
{
string path = Server.MapPath(".") + "\\Common\\" + strFileName;
DataTable dt = new DataTable();
HSSFWorkbook hssfworkbook = null;
XSSFWorkbook xssfworkbook = null;
string fileExt = Path.GetExtension(path);
using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.Read))
{
if (fileExt == ".xls")
hssfworkbook = new HSSFWorkbook(file);
else if (fileExt == ".xlsx")
xssfworkbook = new XSSFWorkbook(file);
}
if (hssfworkbook != null)
{
HSSFSheet sheet = (HSSFSheet)hssfworkbook.GetSheetAt(sheetIndex);
if (sheet != null)
{
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
HSSFRow headerRow = (HSSFRow)sheet.GetRow();
int cellCount = headerRow.LastCellNum;
for (int j = ; j < cellCount; j++)
{
HSSFCell cell = (HSSFCell)headerRow.GetCell(j);
dt.Columns.Add(cell.ToString());
}
for (int i = (sheet.FirstRowNum + ); i <= sheet.LastRowNum; i++)
{
HSSFRow row = (HSSFRow)sheet.GetRow(i);
DataRow dataRow = dt.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
dt.Rows.Add(dataRow);
}
}
}
else if (xssfworkbook != null)
{
XSSFSheet xSheet = (XSSFSheet)xssfworkbook.GetSheetAt(sheetIndex);
if (xSheet != null)
{
System.Collections.IEnumerator rows = xSheet.GetRowEnumerator();
XSSFRow headerRow = (XSSFRow)xSheet.GetRow();
int cellCount = headerRow.LastCellNum;
for (int j = ; j < cellCount; j++)
{
XSSFCell cell = (XSSFCell)headerRow.GetCell(j);
dt.Columns.Add(cell.ToString());
}
for (int i = (xSheet.FirstRowNum + ); i <= xSheet.LastRowNum; i++)
{
XSSFRow row = (XSSFRow)xSheet.GetRow(i);
DataRow dataRow = dt.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
dt.Rows.Add(dataRow);
}
}
}
return dt;
} //调用方式: DataTable dt = ExcelToDataTable("Report.xls");