WP開發圖片保存到獨立存儲并從獨立存儲中讀取 - weihanli－IT工程師數位筆記本

文章出處

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using System.IO;

using System.IO.IsolatedStorage;

1.將圖片保存到獨立存儲空間

 1 using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
 2 
 3             {
 4 
 5                 if (myIsolatedStorage.FileExists(App.fileName))
 6 
 7                 {
 8 
 9                     myIsolatedStorage.DeleteFile(App.fileName);
10 
11                 }
12 
13                 using(IsolatedStorageFileStream fileStream = myIsolatedStorage.CreateFile(App.fileName))
14 
15                 {
16 
17                     BitmapImage bitmap = new BitmapImage();
18 
19                     bitmap.SetSource(stream);
20 
21                     WriteableBitmap wb = new WriteableBitmap(bitmap);
22 
23                     // Encode WriteableBitmap object to a JPEG stream.
24 
25                     wb.SaveJpeg(fileStream, wb.PixelWidth, wb.PixelHeight, 0, 90);
26 
27                 }
28 
29             }
30 
31         }

2.從獨立存儲空間中獲取圖片

 1 using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
 2 
 3                 {
 4 
 5                     if (myIsolatedStorage.FileExists(fileName))
 6 
 7                     {
 8 
 9                         using (IsolatedStorageFileStream fileStream = myIsolatedStorage.OpenFile(fileName, FileMode.Open, FileAccess.Read))
10 
11                         {
12 
13                             BitmapImage bmp = new BitmapImage();
14 
15                             bmp.SetSource(fileStream);
16 
17                         };
18 
19                       }
20                  }