C#将数据导入到Excel表格中

public static DataTable GetExcelToDataTableBySheet(string FileFullPath, string SheetName)
{
            //string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + FileFullPath(fup.postedfile.filename) + ";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=" + fup.postedfile.filename+ ";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];
}

fup.postedfile.filename如果获取的是文件名，则
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