sonic10690

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;
using Microsoft.Xna.Framework.Net;
using Microsoft.Xna.Framework.Storage;
//存檔讀檔必須使用到這兩個namespace
using System.IO;
using System.Xml.Serialization;


namespace Data
{
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        IAsyncResult result;
        SpriteFont a;
        int topscore=9100;     //假設是遊戲的分數
        string score="0";      //在檔案建立時將預設值先存入檔案中
        //存檔的結構也是XML的格式
        public struct SaveGameData
        {
            public string Score;
        }
        //先宣告專門用來存放讀取檔案的物件
        SaveGameData data;

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        protected override void Initialize()
        {
            CreateData();  //先檢查是否檔案有存在
            LoadData();    //先讀取檔案的資料
            base.Initialize();
        }

        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);
            a = Content.Load<SpriteFont>("SpriteFont1");  //讀取字型檔
        }

        protected override void UnloadContent()
        {
        }

        protected override void Update(GameTime gameTime)
        {
            KeyboardState keyboard = Keyboard.GetState();
            if (keyboard.IsKeyDown(Keys.S))
            {
                SaveData(topscore);
            }
            if (keyboard.IsKeyDown(Keys.L))
            {
                LoadData();            
            }
            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.Black);
            String current = "current score";
            String record  = "record score";
            String gamescore;
            gamescore = Convert.ToString(topscore);
            spriteBatch.Begin();
            spriteBatch.DrawString(a, current, new Vector2(0, 0), Color.Blue);
            spriteBatch.DrawString(a, gamescore, new Vector2(0, 50), Color.Blue);
            spriteBatch.DrawString(a, record, new Vector2(0, 100), Color.Yellow);
            spriteBatch.DrawString(a, score, new Vector2(0, 150), Color.Yellow);
            spriteBatch.End();
            base.Draw(gameTime);
        }

        public void CreateData()
        {
            //先取得使用者使用的裝置資訊
            result = Guide.BeginShowStorageDeviceSelector(PlayerIndex.One, null, null);
            StorageDevice device = Guide.EndShowStorageDeviceSelector(result);
            //指定該用戶使用的資料夾
            StorageContainer container = device.OpenContainer("StorageDemo");
            //存放檔名
            string filename = Path.Combine(container.Path, "demobinary.sav");
            //檢查檔案是否已經被創出來了
            if (!File.Exists(filename))
            {
                //建立檔案並先將預設值0存入檔案中,以防null發生
                data.Score = score;
                FileStream file = File.Create(filename);
                XmlSerializer serializer = new XmlSerializer(typeof(SaveGameData));
                //將XML的格式的資料寫入檔案中
                serializer.Serialize(file, data);
                //關閉檔案
                file.Close();
            }
        }

        public void LoadData()
        {
            //先取得使用者使用的裝置資訊
            result = Guide.BeginShowStorageDeviceSelector(PlayerIndex.One, null, null);
            StorageDevice device = Guide.EndShowStorageDeviceSelector(result);
            //指定該用戶使用的資料夾
            StorageContainer container = device.OpenContainer("StorageDemo");
            //存放檔名
            string filename = Path.Combine(container.Path, "demobinary.sav");
            //設定檔案存取的模式和存放檔案的內容
            FileStream stream = File.Open(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite);
            //宣告一個存放XML格式的變數,格式則是剛剛宣告的SaveGameData這個結構
            XmlSerializer serializer = new XmlSerializer(typeof(SaveGameData));
            //將sav檔案XML格式的檔案裡的紀錄存放在新宣告的結構data裡
            data = (SaveGameData)serializer.Deserialize(stream);
            score = data.Score;
            //檔案開啟完畢之後必須做關閉的動作
            stream.Close();
        }

        public void SaveData(int topscore)
        {
            //先取得使用者使用的裝置資訊
            result = Guide.BeginShowStorageDeviceSelector(PlayerIndex.One, null, null);
            StorageDevice device = Guide.EndShowStorageDeviceSelector(result);
            //指定該用戶使用的資料夾
            StorageContainer container = device.OpenContainer("StorageDemo");
            //存放檔名
            string filename = Path.Combine(container.Path, "demobinary.sav");
            //先將字串轉換成數值為了和遊戲分數做比較
            int v ;
            //取出目前檔案的紀錄是多少將他轉換成數值存放起來
            v= Convert.ToInt16(data.Score);
            //如果遊戲分數大於檔案紀錄的分數的話就執行
            if (topscore > v)
            {
                v = topscore;
                data.Score = Convert.ToString(v);
                score = data.Score;
                //開啟檔案
                FileStream stream = File.Open(filename, FileMode.OpenOrCreate, FileAccess.Write);
                XmlSerializer serializer = new XmlSerializer(typeof(SaveGameData));
                //將XML格式的資料存進檔案中
                serializer.Serialize(stream, data);
                //關閉檔案
                stream.Close();
            }
        }
    }
}