XML的应用还是很广泛的，有必要特地的学习一下

//读取XML文件，然后存入数据库
        private void button1_Click(object sender,EventArgs e)
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load("../../Data.xml"); //上上个文件目录

            //XmlNode xn = xmlDoc.SelectSingleNode("students");  //查找第一个节点
            textBox1.Text = xmlDoc.InnerXml;

            string str = "insert into xml values('" + xmlDoc.InnerXml + "')";
            sqlHelper helper = new sqlHelper();
            if (helper.insertData(str,CommandType.Text))
            {
                MessageBox.Show("存入成功！","提示");
            }
            else
            {
                MessageBox.Show("存入失败！","提示");
            }    
        }
        //读取所有的节点(包括元素节点和文本节点）
        private void button2_Click(object sender,EventArgs e)
        {
            System.Xml.Linq.XElement xe = System.Xml.Linq.XElement.Load("../../Data.xml");
            IEnumerable<System.Xml.Linq.XElement> elements = from ele in xe.Elements("student")
                                                      select ele;

            showInfoByElements(elements);
        }

        /// <summary>
        /// 读取所有的节点
        /// </summary>
        /// <param name="elements"></param>
        private void showInfoByElements(IEnumerable<System.Xml.Linq.XElement> elements)
        {
             List<Model> modelList = new List<Model>();
             foreach (var ele in elements)
             {
                 Model model = new Model();

                 model.name = ele.Element("name").Value;
                 model.sex = ele.Element("sex").Value;
                 model.age = Convert.ToInt16(ele.Element("age").Value);
                 modelList.Add(model);
             }
             
              dataGridView1.DataSource=modelList;

        }


        //标题的改变
        private void button3_Click(object sender,EventArgs e)
        {
            if (dataGridView1.ColumnCount<0)
            {
                dataGridView1.ColumnCount = 3;
                dataGridView1.Rows.Add();
            }
          
          
           
            dataGridView1.Columns[0].HeaderCell.Value = "姓名";
            dataGridView1.Columns[1].HeaderCell.Value = "性别";
            dataGridView1.Columns[2].HeaderCell.Value = "年龄";
        }