本文整理汇总了C#中Windows.UI.Xaml.Media.Imaging.WriteableBitmap.SaveToFile方法的典型用法代码示例。如果您正苦于以下问题：C# WriteableBitmap.SaveToFile方法的具体用法？C# WriteableBitmap.SaveToFile怎么用？C# WriteableBitmap.SaveToFile使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Windows.UI.Xaml.Media.Imaging.WriteableBitmap的用法示例。
在下文中一共展示了WriteableBitmap.SaveToFile方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: UriImageSaveLocalAsync
//.........这里部分代码省略.........
//await imageStream.CopyToAsync(ras.AsStreamForWrite());
//if (ras.Size > 0)
//{
// ras.Seek(0);
// await bi.SetSourceAsync(ras);
// //메모리에 저장
// AddImage(filename, bi);
//}
//else
//{
// //파일 이상인듯
// await localFile.DeleteAsync();
// UpdateFolder();
// //재귀호출
// if (retry == false)
// {
// if (imageStream != null) imageStream.Dispose();
// if (ras != null) ras.Dispose();
// return await UriImageSaveLocalAsync(imageUri, true);
// }
// else
// {
// bi.UriSource = new Uri(imageUri);
// if (imageStream != null) imageStream.Dispose();
// if (ras != null) ras.Dispose();
// return bi;
// }
//}
}
else
{
using (HttpClient hc = new HttpClient())
{
try
{
imageStream = await hc.GetStreamAsync(imageUri);
}
catch (Exception)
{
//네트워크 상태가 끊어졌을 때
bi.UriSource = new Uri(imageUri);
if (imageStream != null) imageStream.Dispose();
if (ras != null) ras.Dispose();
return bi;
}
//Stream -> IRandomAccessStream
await imageStream.CopyToAsync(ras.AsStreamForWrite());
if (ras.Size > 0)
{
try
{
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(ras);
BitmapFrame frame = await decoder.GetFrameAsync(0);
//파일로 저장
var bitmap = new WriteableBitmap((int)frame.PixelWidth, (int)frame.PixelHeight);
ras.Seek(0);
await bitmap.SetSourceAsync(ras);
var saveImage = await bitmap.SaveToFile(ApplicationData.Current.TemporaryFolder, filename, CreationCollisionOption.OpenIfExists);
UpdateFolder();
//UriSource로 이미지 넣어주고
bi.UriSource = new Uri(Path.Combine(ApplicationData.Current.TemporaryFolder.Path, saveImage.Name));
//이미지로 변환
//ras.Seek(0);
//await bi.SetSourceAsync(ras);
//메모리에 저장
AddImage(filename, bi);
}
catch (Exception)
{
//이미지가 너무 커서 저장할 수 없을 경우 그냥 이미지 uri를 넣어서 던짐
bi.UriSource = new Uri(imageUri);
if (imageStream != null) imageStream.Dispose();
if (ras != null) ras.Dispose();
return bi;
}
}
else
{
//재귀호출
if (retry == false)
{
if (imageStream != null) imageStream.Dispose();
if (ras != null) ras.Dispose();
return await UriImageSaveLocalAsync(imageUri, true);
}
else
{
bi.UriSource = new Uri(imageUri);
if (imageStream != null) imageStream.Dispose();
if (ras != null) ras.Dispose();
return bi;
}
}
}
}
if(imageStream != null) imageStream.Dispose();
if(ras != null) ras.Dispose();
return bi;
}示例2: GetBitmapSource
public async Task<BitmapSource> GetBitmapSource(object bitmapSource, string cacheName, int width, bool asThumbnail = false)
{
var height = width;
WriteableBitmap writeableBitmap = null;
ObservableCollection<Uri> uriSource = bitmapSource as ObservableCollection<Uri>;
if (!string.IsNullOrEmpty(cacheName) && uriSource != null)
{
try
{
cacheName = asThumbnail ? cacheName + ThumbnailPart : cacheName;
string cacheFileName = string.Format("{0}.{1}", cacheName, ImageExtension);
var storageFolder = await LocalStorage.GetImageFolderAsync();
var storageFile = await storageFolder.TryGetItemAsync(cacheFileName) as StorageFile;
if (storageFile != null)
{
writeableBitmap = await new WriteableBitmap(width, height).LoadAsync(storageFile);
}
var innerWidth = width / 2;
var innerHeight = innerWidth;
writeableBitmap = new WriteableBitmap(width, height);
int index = 0;
foreach (Uri uri in uriSource)
{
try
{
var randomAccessStreamReference = RandomAccessStreamReference.CreateFromUri(uri);
using (IRandomAccessStream randomAccessStream = await randomAccessStreamReference.OpenReadAsync())
{
if (randomAccessStream != null)
{
//We initialize the bitmap with height and width, but the actual size will be reset after the FromStream method!
WriteableBitmap innerImage = new WriteableBitmap(innerWidth, innerHeight);
innerImage = await innerImage.FromStream(randomAccessStream);
int xPosition = 0;
int yPosition = 0;
if (index == 1 || index == 2)
{
xPosition = xPosition + innerWidth;
}
if (index == 1 || index == 3)
{
yPosition = yPosition + innerHeight;
}
writeableBitmap.Blit(
new Rect()
{
Height = innerHeight,
Width = innerWidth,
X = xPosition,
Y = yPosition
},
innerImage,
new Rect()
{
Height = innerImage.PixelHeight,
Width = innerImage.PixelWidth,
X = 0,
Y = 0
}, WriteableBitmapExtensions.BlendMode.Additive);
}
index++;
}
}
catch (Exception)
{ }
}
await writeableBitmap.SaveToFile(storageFolder, cacheFileName, CreationCollisionOption.ReplaceExisting);
}
catch (Exception)
{
}
}
return writeableBitmap;
}示例3: GetWriteableBitmap
private async Task<BitmapSource> GetWriteableBitmap()
{
var width = (int)this.Width;
var height = width;
WriteableBitmap writeableBitmap = null;
string cacheFileName = string.Format("{0}.{1}", this.CacheName, ImageExtension);
var storageFile = await Windows.Storage.ApplicationData.Current.LocalFolder.TryGetItemAsync(cacheFileName) as StorageFile;
if (storageFile != null)
{
writeableBitmap = await new WriteableBitmap(width, height).LoadAsync(storageFile);
}
else
{
try
{
var innerWidth = width / 2;
var innerHeight = innerWidth;
writeableBitmap = new WriteableBitmap(width, height);
int index = 0;
foreach (Uri uri in this.m_uriCollection)
{
try
{
var randomAccessStreamReference = RandomAccessStreamReference.CreateFromUri(uri);
using (IRandomAccessStream randomAccessStream = await randomAccessStreamReference.OpenReadAsync())
{
if (randomAccessStream != null)
{
//We initialize the bitmap with height and width, but the actual size will be reset after the FromStream method!
WriteableBitmap innerImage = new WriteableBitmap(innerWidth, innerHeight);
innerImage = await innerImage.FromStream(randomAccessStream);
int xPosition = 0;
int yPosition = 0;
if (index == 1 || index == 2)
{
xPosition = xPosition + innerWidth;
}
if (index == 2 || index == 3)
{
yPosition = yPosition + innerHeight;
}
writeableBitmap.Blit(
new Rect()
{
Height = innerHeight,
Width = innerWidth,
X = xPosition,
Y = yPosition
},
innerImage,
new Rect()
{
Height = innerImage.PixelHeight,
Width = innerImage.PixelWidth,
X = 0,
Y = 0
}, WriteableBitmapExtensions.BlendMode.Additive);
}
index++;
}
}
catch(Exception)
{ }
}
await writeableBitmap.SaveToFile(Windows.Storage.ApplicationData.Current.LocalFolder, cacheFileName, CreationCollisionOption.ReplaceExisting);
}
catch (Exception)
{
}
}
return writeableBitmap;
}示例4: LoadFile
private async Task LoadFile(StorageFile file)
{
fileName = Path.GetFileNameWithoutExtension(file.Name);
Debug.WriteLine("Picked video: " + fileName + " with full name: " + file.Name);
if (handledExtensions.Contains(Path.GetExtension(file.Path)))
{
MediaClip newClip;
if (imageExtensions.Contains(Path.GetExtension(file.Path)))
{
newClip = await MediaClip.CreateFromImageFileAsync(file, TimeSpan.FromSeconds(DEFAULT_DURATION));
}
else // if (videoExtensions.Contains(Path.GetExtension(file.Path)))
{
newClip = await MediaClip.CreateFromFileAsync(file);
}
m_composition.Clips.Add(newClip);
// Render a thumbnail from the center of the clip's duration
ImageStream x = await m_composition.GetThumbnailAsync(TimeSpan.FromMilliseconds(newClip.StartTimeInComposition.TotalMilliseconds + newClip.TrimmedDuration.TotalMilliseconds / 2d), HEIGHT, 0, VideoFramePrecision.NearestKeyFrame);
StorageFolder localFolder = ApplicationData.Current.LocalFolder;
// Write data to a file
StorageFile imageFile = await localFolder.CreateFileAsync(newClip.GetHashCode() + imageExtensions[0], CreationCollisionOption.ReplaceExisting);
//BitmapImage bitmap = new BitmapImage();
//bitmap.SetSource(x);
//wBitmap.SetSource(x);
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(x);
WriteableBitmap wBitmap = new WriteableBitmap((int)decoder.PixelWidth, (int)decoder.PixelHeight);
// Scale image to appropriate size
BitmapTransform transform = new BitmapTransform()
{
ScaledWidth = Convert.ToUInt32(decoder.PixelWidth),
ScaledHeight = Convert.ToUInt32(decoder.PixelHeight)
};
PixelDataProvider pixelData = await decoder.GetPixelDataAsync(
BitmapPixelFormat.Bgra8, // WriteableBitmap uses BGRA format
BitmapAlphaMode.Straight,
transform,
ExifOrientationMode.IgnoreExifOrientation, // This sample ignores Exif orientation
ColorManagementMode.DoNotColorManage
);
// An array containing the decoded image data, which could be modified before being displayed
byte[] sourcePixels = pixelData.DetachPixelData();
// Open a stream to copy the image contents to the WriteableBitmap's pixel buffer
using (Stream stream = wBitmap.PixelBuffer.AsStream())
{
await stream.WriteAsync(sourcePixels, 0, sourcePixels.Length);
}
await wBitmap.SaveToFile(imageFile, BitmapEncoder.JpegEncoderId);
//var fs = await imageFile.OpenAsync(FileAccessMode.ReadWrite);
//DataWriter writer = new DataWriter(fs.GetOutputStreamAt(0));
//writer.WriteBytes(await x.ReadAsync());
//await writer.StoreAsync();
//writer.DetachStream();
//await fs.FlushAsync();
//StorageFile imgFile = await ApplicationData.Current.LocalFolder.CreateFileAsync(newClip.GetHashCode() + imageExtensions[0], CreationCollisionOption.ReplaceExisting);
//byte[] pixels = new byte[4 * bitmap.PixelWidth * bitmap.PixelHeight];
//Stream pixelStream = wBitmap.PixelBuffer.AsStream();
//pixelStream.Seek(0, SeekOrigin.Begin);
//pixelStream.Write(pixels, 0, pixels.Length);
////BitmapToWriteableBitmap(imgFile);
//await Utilities.SaveToFile(wBitmap, imgFile, new Guid());
////using (var stream = await file.OpenAsync(FileAccessMode.ReadWrite))
////{
//// var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, stream);
//// encoder.SetPixelData(
//// BitmapPixelFormat.Bgra8,
//// BitmapAlphaMode.Ignore,
//// (uint)bitmap.PixelWidth,
//// (uint)bitmap.PixelHeight,
//// 96d,
//// 96d,
//// bitmap.
//// );
////// await encoder.FlushAsync();
//////}
////if (bitmap != null)
////{
//// IRandomAccessStream stream = await bitmap.OpenAsync(FileAccessMode.Read);
//.........这里部分代码省略.........