第八章，作业（网络电视精灵）

----------Xml文件----------

<?xml version="1.0" encoding="utf-8" ?>
<TVChannels>
  <Channel>
    <channelType>TypeA</channelType>
    <tvChannel>北京电视台</tvChannel>
    <path>TypeA.xml</path>
  </Channel>

  <Channel>
    <channelType>TypeB</channelType>
    <tvChannel>凤凰电视台</tvChannel>
    <path>TypeB.xml</path>
  </Channel>
</TVChannels>

<?xml version="1.0" encoding="utf-8" ?>
<!--频道A-->
<typeA>
  <!--电视台名称-->
  <channelName>北京电视台</channelName>
  <!--电视台节目清单-->
  <tvProgramTable>
    <Program>
      <playTime>2017-04-15 6:02</playTime><!--播出时间-->
      <ProgramName>《熊出没》</ProgramName><!--节目名称-->
      <ProgramPath>d:/tv/《熊出没》.mp4</ProgramPath><!--节目路径-->
    </Program>

    <Program>
      <playTime>2017-04-16 7:00</playTime><!--播出时间-->
      <ProgramName>《sugar》</ProgramName><!--节目名称-->
      <ProgramPath>d:/tv/《sugar》.mp4</ProgramPath><!--节目路径-->
    </Program>

    <Program>
      <playTime>2017-04-17 8:08</playTime><!--播出时间-->
      <ProgramName>《西游记》</ProgramName><!--节目名称-->
      <ProgramPath>d:/tv/《西游记》.mp4</ProgramPath><!--节目路径-->
    </Program>
  </tvProgramTable>
</typeA>

<?xml version="1.0" encoding="utf-8" ?>
<!--频道B-->
<typeB>
  <!--电视台名称-->
  <channelName>凤凰电视台</channelName>
  <!--电视台节目清单-->
  <tvProgramTable>
    <program>
      <playTime>2017-04-16 20:00</playTime><!--播出时间-->
      <ProgramName>《雪豹》</ProgramName><!--节目名称-->
      <ProgramPath>d:/tv/《雪豹》.mp4</ProgramPath><!--节目路径-->
    </program>

    <program>
      <playTime>2017-04-16 9:00</playTime><!--播出时间-->
      <ProgramName>《三国》</ProgramName><!--节目名称-->
      <ProgramPath>d:/tv/《三国》.mp4</ProgramPath><!--节目路径-->
    </program>

    <program>
      <playTime>2017-04-17 10:15</playTime><!--播出时间-->
      <ProgramName>《水浒传》</ProgramName><!--节目名称-->
      <ProgramPath>d:/tv/《水浒传》.mp4</ProgramPath><!--节目路径-->
    </program>
  </tvProgramTable>
</typeB>

----------类----------

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TellyFairy.Entity
{
    public abstract class ChannelBase
    {
        /// <summary>
        /// 频道名称
        /// </summary>
        public string ChannelName { get; set; }
        /// <summary>
        /// Xml文件路径
        /// </summary>
        public string Path { get; set; }
        /// <summary>
        /// 节目列表
        /// </summary>
        public List<TvProgram> ProgramList { get; set; }

        public ChannelBase()
        {
            this.ProgramList = new List<TvProgram>();
        }
        /// <summary>
        /// 解析频道节目单信息
        /// </summary>
        public abstract void Fetch();
    
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace TellyFairy.Entity
{
    public class ChannelManager
    {
        //XML文件路径
        public string channelPath = "Tv.xml";
        //所有频道集合
        public Dictionary<string, ChannelBase> channelBase = new Dictionary<string, ChannelBase>();
        /// <summary>
        /// 根据频道类型创建频道
        /// </summary>
        /// <param name="type"></param>
        /// <returns></returns>
        public ChannelBase CreateChannel(string type)
        {
            ChannelBase clb = null;
            if (type == "TypeA")
            {
                clb = new TypeAChannel();
            }
            if (type == "TypeB")
            {
                clb = new TypeBChannel();
            }
            return clb;
        }
        /// <summary>
        /// 加载节目
        /// </summary>
        public void LoadChannel()
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(this.channelPath);
            XmlNode xmlRoot = xmlDoc.DocumentElement;
            //将所有频道添加到channelBase泛型集合
            foreach (XmlNode node in xmlRoot.ChildNodes)
            {
                //根据类型创建不同子类
                ChannelBase clb = CreateChannel(node["channelType"].InnerText);
                //根据创建不同子类的对象将不同频道名称赋值给属性
                clb.ChannelName = node["tvChannel"].InnerText;
                //根据创建不同子类的对象把不同频道的xml地址赋值属性
                clb.Path = node["path"].InnerText;
                //根据不同子类对象执行重写方法 给 节目列表赋值
                clb.Fetch();
                //将不同频道 赋值给所有频道泛型集合
                channelBase.Add(clb.ChannelName, clb);
            }
        }

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TellyFairy.Entity
{
    public class TvProgram
    {
        /// <summary>
        /// 播出时间
        /// </summary>
        public DateTime PlayTime { get; set; }
        /// <summary>
        /// 节目名称
        /// </summary>
        public string ProgramName { get; set; }
        /// <summary>
        /// 节目路径
        /// </summary>
        public string ProgramPath { get; set; }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace TellyFairy.Entity
{
    public class TypeAChannel:ChannelBase
    {
        public override void Fetch()
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(base.Path);
            //XmlElement elem = xmlDoc.DocumentElement;
            XmlNode xmlRoot = xmlDoc.DocumentElement;
            ProgramList = new List<TvProgram>();
            foreach (XmlNode node in xmlRoot.ChildNodes)
            {
                if (node.Name == "tvProgramTable")
                {
                    foreach (XmlNode node1 in node.ChildNodes)
                    {
                        //新建节目类型对象
                        TvProgram program = new TvProgram();
                        //根据xml数据赋值对应属性
                        program.PlayTime = DateTime.Parse(node1["playTime"].InnerText);
                        program.ProgramName = node1["ProgramName"].InnerText;
                        program.ProgramPath = node1["ProgramPath"].InnerText;
                        //将节目添加到节目列表
                        ProgramList.Add(program);
                    }
                }
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace TellyFairy.Entity
{
    public class TypeBChannel:ChannelBase
    {
        public override void Fetch()
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(base.Path);
            //XmlElement elem = xmlDoc.DocumentElement;
            XmlNode xmlRoot = xmlDoc.DocumentElement;
            ProgramList = new List<TvProgram>();
            foreach (XmlNode node in xmlRoot.ChildNodes)
            {
                if (node.Name == "tvProgramTable")
                {
                    foreach (XmlNode node1 in node.ChildNodes)
                    {
                        //新建节目类型对象
                        TvProgram program = new TvProgram();
                        //根据xml数据赋值对应属性
                        program.PlayTime = DateTime.Parse(node1["playTime"].InnerText);
                        program.ProgramName = node1["ProgramName"].InnerText;
                        program.ProgramPath = node1["ProgramPath"].InnerText;
                        //将节目添加到节目列表
                        ProgramList.Add(program);
                    }
                }
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using TellyFairy.Entity;

namespace TellyFairy
{
    public partial class FrmMain : Form
    {
        public FrmMain()
        {
            InitializeComponent();
            //初始把ContextMenuStrip两个选项隐藏
            cmsiMenu.Items[0].Visible = false;
            cmsiMenu.Items[1].Visible = false;
        }
        ChannelManager clm = new ChannelManager();

        /// <summary>
        /// 初始化TreeView 选项
        /// </summary>
        public void InitList()
        {
            tvTv.Nodes.Add("我的电视台");
            tvTv.Nodes.Add("所有电视台");
            //加载节目
            clm.LoadChannel();
            //将所有频道名称加到所有电视台
            foreach (var cb in clm.channelBase)
            {
                tvTv.Nodes[1].Nodes.Add(cb.Key);
            }
            //展开所有节点
            tvTv.ExpandAll();
        }
        /// <summary>
        /// 窗体加载
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FrmMain_Load(object sender, EventArgs e)
        {
            dgvProgram.AutoGenerateColumns = false;
            InitList();
        }
        //Items[0]:删除,Items[1]:添加
        private void tvTv_MouseClick(object sender, MouseEventArgs e)
        {
            
                //如果选中的是我的电视台的子节点则把删除显示,加入隐藏
                if (tvTv.SelectedNode.Parent != null && tvTv.SelectedNode.Parent.Text.Equals("我的电视台"))
                {
                    cmsiMenu.Items[0].Visible = false;
                    cmsiMenu.Items[1].Visible = true;
                }
                //如果选中的是所有电视台的子节点则把隐藏显示，删除隐藏
                else
                {
                    cmsiMenu.Items[1].Visible = false;
                    cmsiMenu.Items[0].Visible = true;
                }
                //如果选中根节点则把两个都隐藏
                if (tvTv.SelectedNode.Level == 0)
                {
                    cmsiMenu.Items[0].Visible = false;
                    cmsiMenu.Items[1].Visible = false;
                }
            
            
        }
        /// <summary>
        /// 右键添加到电视台
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tmsiAdd_Click(object sender, EventArgs e)
        {
            //循环判断“我的电视台”里有无重复频道
            foreach (TreeNode tr in tvTv.Nodes[0].Nodes)
            {
                if (tr.Text.Equals(tvTv.SelectedNode.Text))
                {
                    MessageBox.Show("已有该频道");
                    return;
                }
            }
            tvTv.Nodes[0].Nodes.Add(tvTv.SelectedNode.Text);
            //展开“我的电视台”的节点
            tvTv.Nodes[0].Expand();
        }
        /// <summary>
        /// 右键删除
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tmsiDelete_Click(object sender, EventArgs e)
        {
            tvTv.SelectedNode.Remove();
        }
        /// <summary>
        /// 选中节点后
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tvTv_AfterSelect(object sender, TreeViewEventArgs e)
        {
            BangChannel();
        }
        public void BangChannel()
        {
            //选中根节点不显示节目
            if (tvTv.SelectedNode.Level == 0)
            {
                dgvProgram.DataSource = null;
                return;
            }
            //用选中的频道找节目列表
            dgvProgram.DataSource = clm.channelBase[tvTv.SelectedNode.Text].ProgramList;
        }

    }
}

 -------------窗体