c# - 如何重命名图像

Question

我有一张图片，person1.png，还有另外四张图片，person2.png，person3.png，person5 .png 和 person4.png。我想用 C# 代码重命名这些图像。我该怎么做？

Answer 1

由于 PNG 文件在您的 XAP 中，您可以像这样将它们保存到您的 IsolatedStorage 中:

//make sure PNG_IMAGE is set as 'Content' build type
var pngStream= Application.GetResourceStream(new Uri(PNG_IMAGE, UriKind.Relative)).Stream;

int counter;
byte[] buffer = new byte[1024];
using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
{
   using (IsolatedStorageFileStream isfs = new IsolatedStorageFileStream(IMAGE_NAME, FileMode.Create, isf))
   {
      counter = 0;
      while (0 < (counter = pngStream.Read(buffer, 0, buffer.Length)))
      {
             isfs.Write(buffer, 0, counter);
      }    

      pngStream.Close();

    }
 }

在这里您可以通过更改IMAGE_NAME 将其保存为您想要的任何文件名。

要再次读出来，你可以这样做:

byte[] streamData;    

using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
{
     using (IsolatedStorageFileStream isfs = isf.OpenFile("image.png", FileMode.Open, FileAccess.Read))
     {
          streamData = new byte[isfs.Length];
          isfs.Read(streamData, 0, streamData.Length);              
     }
}

MemoryStream ms = new MemoryStream(streamData);
BitmapImage bmpImage= new BitmapImage();
bmpImage.SetSource(ms);
image1.Source = bmpImage; //image1 being your Image control