string DatabasePath = fd.FileName; 
                //连接字符串 
                string ConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + DatabasePath + ";Extended Properties=Excel 8.0"; 
                //查询Sheet1表中的所有数据 
                string SelectStr = "SELECT * FROM [Sheet1$]"; 
                //建立连接 
                OleDbConnection myconn = new OleDbConnection(ConnString); 
                OleDbDataAdapter da = new OleDbDataAdapter(SelectStr,myconn); 
                //填充数据集 
                DataSet ds = new DataSet(); 
                // 将 Excel 的[Sheet1]表内容填充到 DataSet 对象 
                da.Fill(ds); 
                // 数据绑定 
                this.dataGrid1.DataSource = ds.Tables[0].DefaultView;