ASP.netÁ¬½ÓExcel

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using System.Data.OleDb;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
strfile = Request.QueryString["filename"];//´ÓÆäËûÒ³Ãæ´«¹ýÀ´µÄÎļþ·¾¶
Excel(strfile);
}
}

private void Excel(string filepath)
{
try
{
Dataset ds = new DataSet();
string ConnStr = "Provider=Microsoft.Jet.OleDb.4.0;data source=" + filepath +
";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'";//Á¬½ÓExcelµÄ×Ö·û´®
string query = "SELECT * from [student$]";//ExcelÖеıíÃû³Æ
OleDbCommand oleCommand = new OleDbCommand(query, new OleDbConnection(ConnStr));
OleDbDataAdapter oleAdapter = new OleDbDataAdapter(oleCommand);
oleAdapter.Fill(ds, "[student$]");
rowcount = ds.Tables[0].Rows.Count;
gridview1.DataSource = ds;
gridview1.DataBind();
lblmes.Text = "ÉÏ´«³É¹¦£¬Êý¾ÝÈçÏÂËùʾ£¬ÇëÈ·ÈÏ£º";//lblmesΪlabel£¬ÏÔʾÌáʾÐÅÏ¢
}
catch (OleDbException)
{
string filename = filepath.Substring(filepath.LastIndexOf('/') + 1);
lblmes.Text = "´íÎó£¡ÇëÈ·ÈÏÉÏ´«ÎļþÊÇ·ñÕýÈ·£¡µ±Ç°ÉÏ´«µÄÎļþΪ£º" + filename;
lbtnSure.Visible = false;
}
catch(Exception ee)
{
lblmes.Text = ee.Message;
}
}