bitmapimage

问题 I have used filepicker to choose a photo from a local folder and have assigned that image to an image control in xaml page. Now that the image is there, I want to save it to a byte[] field in my sqlite database. I have tried numerous approaches from searching the internet but most involve a namespace that is not available (like System.Drawing) in windows 8.1 windows store app. Can you suggest a method? Here is the method I use to convert from byte[] array to a bitmap image. I just want the

问题 I am attempting to save an image as modified by graphics tools such as pens and shapes that can be drawn onto the image. I have done this using a panel with background image and trying to set up a bit map that will save changes within this panel: private void saveToolStripButton_Click(object sender, EventArgs e) { //sets panel1 contents as bit map to be saved at set locations int width = panel1.Size.Width; int height = panel1.Size.Height; using (Bitmap bmp = new Bitmap(width, height)) {

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . I have BitmapImage and I need to crop it to a rectangle of size 200x200. The rectangle should contain the center of the source

问题 I am developing an application using WPF to dynamically render content, including text and images from WPF into jpg files. I am currently using the RenderTargetBitmap class to do the job. Everything works as expected but the quality of the rendered fonts is terrible. I understand that the RenderTargetBitmap doesn’t use the ClearType but a GrayScale antialias, which is kind of blury with small fonts. But I am using large fonts, larger than 30 pts, and the results are totally unacceptable. Is

问题 My code as follows is giving me issues trying to write a bitmap image with an odd size 250x250 pixels. When I write it with an evenly divisibly by 3 area, eg. 160x160 everything is fine. I have spent a few hours now trying to get the 250x250 and other odd area's to write correctly but they just won't, the image is diagonal and half of it with the wrong color bits. int screen_save_part(string filename,unsigned x,unsigned y,unsigned w,unsigned h) //Assumes native integers are little endian {

问题 I am trying to set the image from a stream. However when I set the source from the background thread and use a dispatcher it freezes the app completely. The stream is not null, I have verified that. I am using the taglib api to get the stream of the album picture of an mp3 file. I've tried everything. async void Background(object sender, MediaPlayerDataReceivedEventArgs e) { IRandomAccessStream AlbumArtStream = await Media.GetAlbumArt(MediaFile.Name, await MediaFile.OpenStreamForReadAsync());

问题 I have a MFC application with toolbars (using CMFCToolbar). I create the toolbar bitmap on the fly using bitmaps from files and resources. The DIBs have different color formats. So I create an empty bitmap toolbar image compatible to screen DC. Then I open all the bitmaps and blit the content to the toolbar bitmap (GDI does colorspace conversion and stretching for me). Then I save the bitmap to a 24-bit DIB file. Then I create the toolbar object and load the image. That has worked for ages

问题 Currently I am able to select multiple files but when I click open, the selected images are not being shown. Instead, "Windows.UI.XAML.Media.Imaging.BitmapImage" appears as a text. The FlipView functionality is still there though. What am I doing wrong? XAML. <FlipView x:Name="flpView" Grid.Row="1" Margin="10, 10, 10, 10"> <Image x:Name="images" Stretch="UniformToFill" /> </FlipView> Behind code. public async Task flipviewload() { // Add code to perform some action here. Windows.Storage

问题 Downloading a BitmapImage from a URI on the UI thread hangs up the application. To avoid this, I'm trying to download the BitmapImage in a separate thread, would like to know if it can be made simple with TPL. My current method is the following: Task.Factory.StartNew<BitmapImage>(() => new BitmapImage(myUri) { CacheOption = BitmapCacheOption.OnLoad }, CancellationToken.None, TaskCreationOptions.None, new StaTaskScheduler(1)) .ContinueWith(t => image1.Source = t.Result, TaskScheduler

问题 I'm using Silverlight 4 and I'm experiencing the following problem: First off, the code: BitmapImage bitmapImage = new BitmapImage(); bitmapImage.CreateOptions = BitmapCreateOptions.IgnoreImageCache; bitmapImage.DownloadProgress += new EventHandler<DownloadProgressEventArgs>(bitmapImage_DownloadProgress); bitmapImage.UriSource = new Uri("http://choteborsky.aspone.cz/Images/Label.png", UriKind.Absolute); bitmapImage.ImageFailed += new EventHandler<ExceptionRoutedEventArgs>(bitmapImage