在C#中還有一種叫做IsolatedStorage的存儲機制,他存儲信息的方式類似於我們的cookie, IsolatedStorage存儲獨立於每一個application,換句話說我們加載多個應用程序是他們不會相互影響,我們這樣就可以在 下次運行的時從IsolatedStorage中提取一些有用的數據,這對我們來說是很好的一件事吧~

使用islatedstorage也十分簡單,不廢話了 還是上個實例看吧.

先獲取一個IsolatedStorage文件對象.

隨後我們將創獲取IsolatedStorageFileStream對象,再以文件流的形式寫入和讀取

註:(using System.IO.IsolatedStorage;using System.IO;)

 static void Main(string[] args)
        {
            string fileName = "test.txt";
            SaveData("測試內容.", fileName);
            string content = LoadData(fileName);
            Console.ReadKey();
        }
        //保存
        static void SaveData(string _data, string _fileName)
        {
            
 
//如果嘗試使用此方法 ClickOnce 或基於 Silverlight 的應用程序之外，你將收到IsolatedStorageException異常，因為不能確定調用方的應用程序標識。
            //using (IsolatedStorageFile myIsf = IsolatedStorageFile.GetUserStoreForApplication())

            using (IsolatedStorageFile isf = IsolatedStorageFile.GetStore(IsolatedStorageScope.User | IsolatedStorageScope.Assembly, null
 
, null))
            {
                //var availableFreeSpace = isf.AvailableFreeSpace.ToString() + " bytes";//這裏是剩余空間
                //var quota = isf.Quota.ToString() + " bytes";//這裏是當前的限額
                //var usedSpace = (isf.Quota - isf.AvailableFreeSpace).ToString() + " bytes";//這裏是用戶已經使用的空間

                //if (true == isf.IncreaseQuotaTo(1048576 * 2))//將限額增加到2MB(註: 這裏單位是bytes) 新配額必須大於舊配額
                //{
                //    quota = isf.Quota.ToString() + " bytes";//  限額
                //}
                //else
                //{
                //   var Text = "限額更改失敗.";
                //}

                using (IsolatedStorageFileStream isolatedStorageFileStream = new IsolatedStorageFileStream(_fileName, FileMode.OpenOrCreate, isf))
                {
                    //獲取文件路徑
                    //string filePath = isolatedStorageFileStream.GetType().GetField("m_FullPath", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(isolatedStorageFileStream).ToString();
                    using (StreamWriter mySw = new StreamWriter(isolatedStorageFileStream))
                    {
                        mySw.BaseStream.Seek(0, SeekOrigin.End); //追加(寫入位置)
                        mySw.Write(_data);
                        mySw.Close();
                    }
                }
            }
        }
        //讀取
        static string LoadData(string _fileName)
        {
            string data = String.Empty;
            using (IsolatedStorageFile myIsf = IsolatedStorageFile.GetStore(IsolatedStorageScope.User | IsolatedStorageScope.Assembly, null, null))
            {
                using (IsolatedStorageFileStream isolatedStorageFileStream = new IsolatedStorageFileStream(_fileName, FileMode.Open, myIsf))
                {    //獲取文件路徑
                     //  string filePath = isolatedStorageFileStream.GetType().GetField("m_FullPath", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(isolatedStorageFileStream).ToString();
                    using (StreamReader sr = new StreamReader(isolatedStorageFileStream))
                    {
                        string lineOfData = string.Empty;
                        while ((lineOfData = sr.ReadLine()) != null)
                            data += lineOfData;
                    }
                }
            }
            return data;
        }

    }

參考:

IsolatedStorageFile.GetUserStoreForApplication

使用 IsolatedStorageFileStream 存儲信息