ASP.net连接Excel

首先添加命名空间

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;
        }
    }