while(datareader.read())
{
..............
}
dataview.datasource=datareader;
dataview.databind();

public string test = "";
    protected void Page_Load(object sender, EventArgs e)
    {
        DataSet ds=new DataSet();//這里是你的數據，我就不寫了
        test = "<table>";
        for (int i = 0; i < ds.Tables[0].Rows; i++)
        {
            test+="<tr><td>"+ds.Tables[0].Rows[i]["你要的字段"].ToString()+"</td></tr>"
        }
        test+="</table>";
    }

<form id="form1" runat="server">
    <%=test %>
    </form>

int id = reader.GetOrdinal("CategoryName");
while (reader.Read())
{
　　Response.Write(reader.GetInt32(0).ToString() + " " + reader.GetString(1).ToString() + "<br />");
　　reader.Close();
}