导入Excel的有关问题，大家来看看啊

导入Excel的问题，大家来看看啊。。
今天在导入Excel的时候，报错：The Microsoft Access database engine cannot open or write to the file 'D:\Daniel\StarBucksFulfillments\WebSite\UpLoad\GoldCardReplacement\'. It is already opened exclusively by another user, or you need permission to view and write its data.我这个Excel文档没有打开啊，请问这是什么问题呢？？附上导入Excel的代码

C# code

public DataSet Execl()    {        DataTable dt=GetSchemaTableName();        ArrayList list = new ArrayList();        foreach (DataRow item in dt.Rows)        {            list.Add(item["TABLE_NAME"].ToString());        }        DataSet Myds = new DataSet();        OleCon.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FileName + ";Extended Properties='Excel 12.0; HDR=NO; IMEX=1'";        OleCon.Open();        OleCmd.CommandText = "select * from [" + list[0] + "]";        OleCmd.Connection = OleCon;        OleDa.SelectCommand = OleCmd;        //DataTable dt = new DataTable();                try        {            //OleCon.ConnectionString = "Provider=Microsoft.Ace.OleDb.12.0;" + "data source=" + FileName + ";Extended Properties='Excel 12.0; HDR=NO; IMEX=1'";            OleDa.Fill(Myds, "Execl");            return Myds;            //OleCon.Open();            //dt = OleCon.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);            //return dt;        }        catch(Exception e)        {            return Myds;            //return dt;        }        finally        {            OleCon.Close();            OleCmd.Dispose();            OleDa.Dispose();            OleCon.Dispose();        }

C# code

Public DataSet ds(){string type2 = fu_fileuplaod.FileName;            var type3 = type2.Substring(type2.LastIndexOf('.'));            if (!type3.Equals(".xls") && !type3.Equals(".xlsx"))            {                RegisterScriptAlert("上传excel文档的格式与所要求的格式不一致");                return;            }            string newName = Server.MapPath("..//App_Data//Uploads//") + DateTime.Now.ToString("hhmmss") + ".xls";            fu_fileuplaod.SaveAs(newName);            string connStr = string.Empty;            if (type3.Equals(".xlsx"))            {                connStr = "Provider=Microsoft.Ace.OleDb.12.0;Data Source=" + newName +                          ";Extended Properties='Excel 12.0 Xml; HDR=YES; IMEX=1'";            }            else if (type3.Equals(".xls"))            {                connStr = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + newName +                          ";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'";            }            OleDbConnection conn = new OleDbConnection(connStr);            if (conn.State.ToString() == "Closed")            {                conn.Open();            }                        DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);         ArrayList list = new ArrayList();foreach (DataRow item in dt.Rows)        {            list.Add(item["TABLE_NAME"].ToString());        }           var str11 = "select * from [" + list[0] + "]";                OleDbDataAdapter oda = new OleDbDataAdapter(str11, conn);                DataSet ds = new DataSet();                oda.Fill(ds);           conn.Close();            File.Delete(newName)}
[解决办法]
注意access权限设置
[解决办法]
可能是Excel连接字符串写错了 
 

C# code
//2007或者2010版本的Office              //string conn_str = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Path + "; Extended Properties=Excel 12.0;";              //2003的Office              string conn_str = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + Path + ";" + "Extended Properties=Excel 8.0;";