Develop Reference

SVG rendering in C# with SVG library always fills shapes with black

I'm using the Svg.Core library (version 3.0.49.2) to render SVGs (defined in strings) to PNG images. No matter what I do, any shape seems to be rendered with a black stroke and a black fill.
Here's the code I'm using for a simple rectangle, as an example:
var svgString = #"<svg width=""300"" height=""300"" xmlns=""http://www.w3.org/2000/svg"" xmlns:xlink=""http://www.w3.org/1999/xlink""><rect x=""5"" y=""5"" height=""90"" width=""50"" fill=""#ef0000"" stroke=""#00ef00"" /></svg>";
var svgDocument = SvgDocument.FromSvg<SvgDocument>(svgString);
var bitmap = svgDocument.Draw();
bitmap.Save(fileName, ImageFormat.Png);
which ends up rendering a rectangle of the correct height and width, but all black:
I've seen a number of posts that mention various versions of inlining styles, but regardless of whether I'm using a style="" approach or a fill="", the problem continues. Also seems to happen without fill color specified or using standard color names instead of RGB values.
Any help or ideas are appreciated!

The best answer I have come up with here is from the comment earlier. If you put the following around it: svgDoc.Color = new SvgColourServer(Color.DarkGreen); svgDoc.StopColor = new SvgColourServer(Color.DarkGreen); svgDoc.Stroke = new SvgColourServer(Color.DarkGreen); svgDoc.Fill = new SvgColourServer(Color.DarkGreen); , you will get colors in the SVG. Posting this as the answer in case anyone runs into this issue down the road.

WPF Printing Large Canvas over multiple Pages

I've got this problem:
I created a pretty large Canvas in WPF with a lot children.
I want to add a Print Button. PrintVisual seems not to work, because the image is to big. (I am using a scrollbar) I want to split the Canvas between multiple pages.
What i've done so far:
I am taking a Visual Brush for every part of the Canvas
Create a new Canvas and make the visual brush its background
Adding the new Canvas to a page, add the page to a FixedDocument.
Well, now i've got a FixedDocument and going to print it via printDocument.
The Problem is, that the whole process of printing takes a lot of time and sometimes it doesn't work at all. It's like there is a preprocessing step to convert the fixed document into a bitmap.
My Question: Is a Visualbrush in a Canvas to big? Should i convert the Canvas first into a bitmap?
I've found this great article: http://www.codeproject.com/Articles/339416/Printing-large-WPF-UserControls.
Whatever.
Is it a good way to convert a huge canvas into a bitmap first and then print parts of the bitmap? I could very well imagine, that one could get problems with blurring effects this way.
I've got also no idea how to add a bitmap to a page in wpf.
The worst thing is, that i couldn't found some really good sorces or a standardway (and i think there has to be one, cause this should be a pretty standard problem) for printing dynamic produced canvas in wpf.
I am really greatful for every really good source, help or code.
Thank you for your time.

Stopping effects from repeating on one another

I posted this question earlier but I have modified my code to a simple algorithm and I still have the same issue as before:
I created a picturebox which, when an effect is selected, it will then change the image in the picturebox using the color matrix.
The issues I'm having is if I choose another effect when one is selected the old effect will not disappear, instead it will just stay there and be underneath the new effect selected. The effects I'm using is sepia and greyscale for now, but can anyone help me so that once one effect is selected, the old effect is cleared rather than them just stacking up on one another. "

The key here is to cache the originalImage in a non-volatile area. For example, load it up into a hidden pictureBox that you don't touch.
When you want to apply an effect, copy the originalImage over into a displayImage picturebox and then apply the effect.

It also looks like you are setting your image to the image that is there. I am not sure but this may be taking into account what you have already set. For example when you set
Image originalImage = pictureBox.Image;
This may be taking the image you have displayed along with any effects you have already applied and setting that as your image to be modified. Like I said I am unsure of this since I can't test it at the moment.
EDIT
The following works for me:
Replace
Bitmap originalImage = (Bitmap)displayPictureBox.Image;
originalImage = (Bitmap)pictureBox.Image.Clone();
With
Image therealoriginalimage = Image.FromFile(#"C:\Users\Me\Desktop\testimg.png");
Bitmap originalImage = (Bitmap)therealoriginalimage;
As both answers mention it looks like you are setting your original image = what is currently in the picture box.
The above code is a quick fix so you can see exactly what was happening. You should modify this and have the originalimage saved as a varible as soon as your app starts. It will be much cleaner than the example above that sets the image each time you call the method

Images Scaling Down in draw in C#

Alright guys last little bit of this project I'll ask for help on I promise.
So I go to load the images, works fine however I notice upon loading that the dimensions of the image have been scaled down in the y to 300 (all are a constant value of 433) and up or down from their original width to 600.
I'm using the following method to load them
foreach (string file in Directory.EnumerateFiles(imagePath, "*.JPG"))
{
Image contents = Image.FromFile(file);
treesImage[count] = contents;
count++;
}
and this is the resulting image when I have it loaded.
http://i.stack.imgur.com/Q40kK.png
As you can see the image below the red rectangle is quite small
Any help would be appreciated. If you require any more information please post below and I'll make sure to edit the original question with the relevant information as soon as humanly possible.
EDIT: I am using a simple windows form application and not another graphical framework for my own reasons.
Thanks in advance :)

I'll assume you are using a PictureBox control to display the image.
When someone chooses a tree from your map, you obviously set the PictureBox Image property to the image object referenced by the index in the array. Use the Image object to set the ClientSize of the PictureBox control.
...
Image img = treesImage[idx];
MyPictureBox.SizeMode = PictureBoxSizeMode.Normal;
MyPictureBox.ClientSize = new Size(img.Width,img.Height);
MyPictureBox.Image = img;
...
Alternately you can define one size for your PictureBox and force all the images to be scaled to that size by setting the control SizeMode property to StretchImage declaratively.
I would recommend that you create a simple class (MyImageInfo for example) that would store the Path, Width, and Height of the images found in your first function into a list and then just as before when a user clicks to view an image you set the width and height of the PictureBox and then call the LoadAsync(path) method to get the image. then you aren't storing all images in memory at once, just as you need them since it doesn't look like this requires a lot of quick jumping from image to image.

Silverlight different behaviour when being run from website

I am working on a simple Silverlight application. The point of application is to display data loaded from XML file. Data consists of String "password" and Integer "passwordCount". Each loaded position is displayed as a coloured square and whenever user moves mouse over this square it is resized to "passwordCount/10" pixel width or height and the "password" string is displayed on it. Here is an example:
On Mouseover:
Everything works fine if I run it via VisualStudio Run button. The problem is that when I place the script on website, tiles resize in the wrong direction (they become smaller instead of bigger). The text is not displayed either. I don't have the faintest idea why. Silverlight on website opens in a separate window and it looks like that on mouseover:
(source: screenshu.com)
Here is the function I use to animate tiles:
public void rectangle_MouseEnter(object sender, MouseEventArgs e)
{
sbMouseON = new Storyboard();
DoubleAnimation sizeAnimation = new DoubleAnimation();
sizeAnimation.To = passwordCount/10; //passwordCount is always greater than 1000
sizeAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(300));
Storyboard.SetTarget(sizeAnimation, (Rectangle)sender);
Storyboard.SetTargetProperty(sizeAnimation, new PropertyPath(direction));
sbMouseON.Children.Add(sizeAnimation);
Canvas.SetZIndex(rect, 2); //move rectangle up to make animation visible
DrawTextBlock();
sbMouseON.Begin();
}

Mods: Can't Add Comment so posting as answer
Here I am assuming that the "direction" you are passing in the TargetProperty is "(FrameworkElement.Width)" to increase the width of the rectangle.
If so only Logical Reason a Object can reduce in size is "sizeAnimation.To" property you are setting is setting the value which is smaller than the actual width of the object.
What is this DrawTextBlock() doing ? is there any code in there which can change the behavior of animation ?

The problem solved itself. I've just copied all files onto server and it works great. Looks like it was some Windows problem. Thank you for your interest #Abhinav.