C# 从独立存储中的映像设置次平铺背景映像
这是我从图像url获取流的方式:C# 从独立存储中的映像设置次平铺背景映像,c#,windows-phone-8,C#,Windows Phone 8,这是我从图像url获取流的方式: using (var httpClient = new HttpClient()) { response = await httpClient.GetStreamAsync(new Uri(IMAGEURL_HERE, UriKind.Absolute)); } SaveImage(response); 这就是我如何将其保存到IsolatedStorage的方法:
using (var httpClient = new HttpClient())
{
response = await httpClient.GetStreamAsync(new Uri(IMAGEURL_HERE, UriKind.Absolute));
}
SaveImage(response);
这就是我如何将其保存到IsolatedStorage的方法:
private void SaveImage(Stream result)
{
using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
{
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(result);
var wb = new WriteableBitmap(bitmap);
using (IsolatedStorageFileStream fileStream = file.CreateFile("FILENAME.jpg"))
{
int width = wb.PixelWidth;
int height = wb.PixelHeight;
if (wb.PixelWidth > 336)
{
width = 336;
}
if (wb.PixelHeight > 336)
{
height = 336;
}
Extensions.SaveJpeg(wb, fileStream, width, height, 0, 100);
}
}
}
假设文件名为FILENAME.jpg,我想我可以将其设置为BackgroundImage,并设置为如下所示的辅助磁贴:
var tileData = new FlipTileData()
{
...
BackgroundImage = new Uri("isostore:/Shared/ShellContent/FILENAME.jpg", UriKind.Absolute),
...
这行不通。它不会引发异常,只有图像不会显示。我错过了什么?当然,如果我把图像Url作为Uri放在BackgroundImage中,它会工作,但这不是我想要的
编辑:我在这里看到过类似的问题,但它对我的代码没有帮助。试试这个。也许是它的帮助
string imageFolder = @"\Shared\ShellContent";
string shareJPEG = "FILENAME.jpg";
private void SaveImage(Stream result)
{
using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
{
if(!myIsolatedStorage.DirectoryExists(imageFolder))
{
myIsolatedStorage.CreateDirectory(imageFolder);
}
if (myIsolatedStorage.FileExists(shareJPEG))
{
myIsolatedStorage.DeleteFile(shareJPEG);
}
string filePath = System.IO.Path.Combine(imageFolder, shareJPEG);
IsolatedStorageFileStream fileStream = myIsolatedStorage.CreateFile(filePath);
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(result);
WriteableBitmap wb = new WriteableBitmap(bitmap);
// Encode WriteableBitmap object to a JPEG stream.
int width = wb.PixelWidth;
int height = wb.PixelHeight;
if (wb.PixelWidth > 336)
{
width = 336;
}
if (wb.PixelHeight > 336)
{
height = 336;
}
Extensions.SaveJpeg(wb, fileStream, width, height, 0, 100);
fileStream.Close();
}
}
private void CreateTile()
{
var tileData = new FlipTileData()
{
....
string filePath = System.IO.Path.Combine(imageFolder, shareJPEG);
BackgroundImage = new Uri(@"isostore:" + filePath, UriKind.Absolute);
....
}
}
tileData.BackgroundImage=…我已经编辑了代码。下面是FlipTileData的ctor,所以创建互动程序不是问题,它很好用,也适用于站点的图像URL,但不适用于IsoStorage。FlipTileData()抛出System.UriFormatException。在创建磁贴之前,我已经检查了FileExists的路径,文件就在那里。有什么想法吗?检查我的最新答案。现在它对我来说非常好用。uri中缺少
:
。