ASP.net连接Excel的代码

using System.Data.OleDb; 
protected void Page_Load(object sender, EventArgs e) 
{ 
if (!IsPostBack) 
{ 
strfile = Request.QueryString["filename"];//从其他页面传过来的文件路径 
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'";//连接Excel的字符串 
string query = "SELECT * FROM [student$]";//Excel中的表名称 
OleDbCommand oleCommand = new OleDbCommand(query, new OleDbConnection(ConnStr)); 
OleDbDataAdapter oleAdapter = new OleDbDataAdapter(oleCommand); 
oleAdapter.Fill(ds, "[student$]"); 
rowcount = ds.Tables[0].Rows.Count; 
gridview1.DataSource = ds; 
gridview1.DataBind(); 
lblmes.Text = "上传成功，数据如下所示，请确认：";//lblmes为label，显示提示信息 
} 
catch (OleDbException) 
{ 
string filename = filepath.Substring(filepath.LastIndexOf('/') + 1); 
lblmes.Text = "错误！请确认上传文件是否正确！当前上传的文件为：" + filename; 
lbtnSure.Visible = false; 
} 
catch(Exception ee) 
{ 
lblmes.Text = ee.Message; 
} 
}