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Questions tagged [rendertargetbitmap]

The RenderTargetBitmap class, part of the .NET Framework (from version 3.0), converts a System.Windows.Media.Visual object into a bitmap.

The RenderTargetBitmap class (System.Windows.Media.Imaging.RenderTargetBitmap) converts a Visual (System.Windows.Media.Visual) object into a bitmap.

It can be used for example to render text as an image.

Support of RenderTargetBitmap was added to version 3.0 of the .NET Framework.

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Scale TextBox on RenderTargetBitmap without loss of quality

Does anybody know if there is a way to ensure that TextBoxes scale nicely on RenderTargetBitmap? See my code below, I am attempting to produce an output file of a Canvas with various different elements in it. Images scale perfectly fine with no…
Adam McMahon
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Using CompositionTarget.SurfaceContentsLost Event in UWP for managing RenderTargetBitmap?

I was reading up on RenderTargetBitmap for a bug in one of my UWPs where a captured image wasn't displaying correctly. Came across a remark from Microsoft stating RenderTargetBitmap can lose data for some reason or another and that we should be…
Stoic Developer
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Render Bitmap in UWP with MVVM

In my code behind I used to render the bitmap from my grid with RenderTargetBitmap. var renderBitmap = new RenderTargetBitmap(); await renderBitmap.RenderAsync(UIElement); I want to use the MVVM pattern but now the RenderTargetBitmap class does not…
Agredo
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RenderTargetBitmap renders empty images

Here's the situation: I have an ASP.NET Web Forms application which uses WPF controls for reporting. Process is the following: Create WPF controls and bind to data -> create image from WPF control -> use generated image to create PDF reports. I'm…
Michael
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renderTargetBitmap.RenderAsync Ignores Image on UserContol

I have a UserControl like this:
berkb
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How to use the RenderedTargetBitmap after update the view in uwp?

I have the scroll viewer to zoom the image and I zoomed the image and made some changes in the image. Then, I am trying to save an image in button click. In the button click, I have changed the Zoom factor value to 1 and then use the…
Santhiya
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Render WPF UIElement without using arrange()

I'm trying to render a canvas from my ViewModel. After passing the canvas to my VM I render it using this function: private void GenerateTextures(object obj) { if (!(obj is UIElement)) return; UIElement control = (UIElement)obj; …
Andronomos
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Creating bitmap in memory using RenderTargetBitmap fails in production WCF Service

I am using WPF objects to generate an bitmap image in memory. The program that does this resides in a WCF web service. The image renders correctly when I run on locally on IISExpress, and on a test IIS 7 server. However, when running on a server…
Los2000
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Memory leak in RenderTargetBitmap

I'm using a RenderTargetBitmap to render a set of controls in order to generate a PDF. The following code segment is the relevant section: public Drawing.Image RenderPageBitmap() { RenderTargetBitmap bit = null; Drawing.Bitmap bmp = null; …
Olivia Trewin
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Has a unexpected transparent area in image that RenderTargetBitmap captured wpf control

I tried to capture main window wpf application to png image by RenderTargetBitmap class. It work well except the image has a small transparent area at the bottom and the left. This is code and captured image: private void…
Jacky
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Unable to load Splat.IBitmap from MemoryStream

I am trying to render layout data to a bitmap in a platform-agnostic manner by returning a Splat.IBitmap and am having trouble outputting the results. My WPF platform code looks like this: MemoryStream stream = new MemoryStream(); try { …
Matt Singer
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How to convert Image to ImageSource

I don't know if I'm even asking the right question; so apologies in advance. I am writing some PNGs to a canvas and I also want to simultaneously copy the PNGs to a bitmap. I want the PNGs to appear in the same locations on the bitmap as they do on…
zetar
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RenderTargetBitmap.GetPixelsAsync() throws HResult 0x80004005 "Unspecified error" if app is not in foreground

I'm saving a RenderTargetBitmap on app's Suspending event. Everything is fine if I have the app opened and I hit "Suspend and shutdown" in Visual Studio. But if I go to Start screen first or open another app and wait a while, in other words - the…
Andrei Ashikhmin
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Create snapshot of a non-shown UserControl

I want to take a snapshot of my UserControl, which has not been shown yet. That's my code: public Screenshot(MyViewModel viewModel) { if (viewModel == null) return; // Create a TabControl, where View is hosted…
Benny
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PngBitmapEncoder creating an "empty" file

I have a DVC Chart displaying data. I have created a button to export the graph. Here is the code: private void btnExptGraph_Click(object sender, RoutedEventArgs e) { RenderTargetBitmap renderBitmap = new…
SDSMTKyzer
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