我想从gridview添加，更新和删除xml

Question

如何在gridview的帮助下操作xml文件。我无法将gridview转换为添加，更新和删除操作并处理它们。 enter code here [1]：http://i.stack.imgur.com/Me0Fb.png

protected void Page_Load(object sender, EventArgs e)
                {
                    XDocument xmlDoc = XDocument.Load("d:/myXml.xml");//Adding an element
        [enter image description here][1]
                    SerDes obj = new SerDes();

                    var cat = obj.DeSerialize(xmlDoc.ToString());
                    List<Item> items = cat.Items.ToList();
                    items.Add(new Item { ItemID = 2, ItemName = "Test", ItemPrice = 100, ItemQtyInStock = 50 });// adding an item
                    //cat.Items.ToList().FirstOrDefault(item => item.ItemID == 2).ItemName = "Custom Name"; //updating an item
                    var x = cat.Items.ToList().FirstOrDefault(item => item.ItemID == 2); //deleting an item
                    items.Remove(x);

                    var len = items.Count();
                    cat.Items = items.ToArray();
                    XmlDocument xdoc = new XmlDocument();
                    xdoc.LoadXml(obj.Serialization(cat));
                    xdoc.Save(@"D:\myXml.xml");
                }

                protected void Button1_Click(object sender, EventArgs e)
                {
                    DataSet dataSet = new DataSet();
                    dataSet.ReadXml(@"D:\myXml.xml");
                    GridView1.DataSource = dataSet.Tables[2];
                    GridView1.DataBind();
                }