使用HttpClient下載的圖像已損壞

Question

我試圖將圖像從網絡保存到本地存儲以便以後處理，但它看起來已損壞，並試圖用外部應用程序打開它失敗。在瀏覽器中打開圖像完全正常工作。謝謝你的幫助。

var client = new HttpClient(); 
var clientResponse = await client.GetByteArrayAsync(imageUri); 

var temp = ApplicationData.Current.TemporaryFolder; 
StorageFile file; 
if ((await temp.GetFilesAsync()).Any(f => f.Name == "temp_image.png")) { 
    file = await temp.GetFileAsync("tempcolorizer.png"); 
} else { 
    file = await temp.CreateFileAsync("temp_image.png"); 
} 
using (var fs = await file.OpenReadAsync()) 
using (var writer = new DataWriter(fs)) { 
    writer.WriteBytes(clientResponse); 
} 

Answer 1

你必須調用StoreAsync：

using (var fs = await file.OpenReadAsync()) 
using (var writer = new DataWriter(fs)) { 
    writer.WriteBytes(clientResponse); 
    await writer.StoreAsync(); 
}