c#读取excel的xls和xlsx文件的方法

.NET 读取Excel 2007的xlsx文件和读取老的.xls文件是一样的，都是用Oledb读取,仅仅连接字符串不同而已。
读取xlsx 用的是Microsoft.Ace.OleDb.12.0;
具体操作方法如下：
public  static  DataTable GetExcelToDataTableBySheet( string  FileFullPath, string  SheetName)
{
            //string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + FileFullPath + ";Extended Properties='Excel 8.0; HDR=NO; IMEX=1'"; //此连接只能操作Excel2007之前(.xls)文件
            string  strConn = "Provider=Microsoft.Ace.OleDb.12.0;"  + "data source="  + FileFullPath + ";Extended Properties='Excel 12.0; HDR=NO; IMEX=1'" ; //此连接可以操作.xls与.xlsx文件
            OleDbConnection conn = new  OleDbConnection(strConn);
            conn.Open();
            DataSet ds = new  DataSet();
            OleDbDataAdapter odda = new  OleDbDataAdapter( string .Format( "SELECT * FROM [{0}]" , SheetName), conn);                    //("select * from [Sheet1$]", conn);
            odda.Fill(ds, SheetName);
            conn.Close();
            return  ds.Tables[0];

}


老的xls就很简单，只是注意是Jet，还有ver是8.0
ResultInfo> Result = new ResultInfo>(); string ver = ""; int pos = FilePath.LastIndexOf(".") + 1; string postFileName = FilePath.Substring(pos, FilePath.Length - pos); if (postFileName == "xls") { ver = "8.0"; } else { Result.Message = "请上传Exel-xls文件。"; Result.IsSuccess = false; return Result; } DataSet result = null; string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + FilePath + ";" + "Extended Properties=\"Excel " + ver + ";IMEX=1\""; OleDbConnection conn = new OleDbConnection(strConn); try { conn.Open(); string strExcel = "select * from [sheet1$]"; OleDbDataAdapter myCommand = new OleDbDataAdapter(strExcel, strConn); result = new DataSet(); myCommand.Fill(result, "MFMui"); } catch (Exception e) { if (e != null) { Result.Message += e.Message; return Result; } } finally { conn.Close(); }