BitmapImage B = new BitmapImage();
B.BeginInit();
B.StreamSource = asm.GetManifestResourceStream("WpfApplication26.Back1.png");
B.EndInit();
image1.Source = B;
The size of the image (Back1.png) is 32*32, and I set the size of my image control to 32*32 and set the property "Scale" to "None".
Try
RenderOptions.BitmapScalingMode="NearestNeighbor"
on the image control in xaml or
RenderOptions.SetBitmapScalingMode(image1, BitmapScalingMode.NearestNeighbor)
in code.
Try SnapsToDevicePixels="True" on the image control.
If you still want to clear the image, meaning, turning it to blank, just set the source to "null"
image1.Source = null;
This does not require a BitmapImage.
Sorry for the late reply...
Related
I am maintaining an old application that prints checks from silverlight.
The checks are in a grid and the user selects them and presses the print button.
I verified that all the checks selected in the grid do get sent to the printer but I noticed that sometimes some are missing in the actual printout. I check the EndPrint even for errors and there is none.
How can I make sure all the data gets actually printed?
Here is the code for the printpage event
StackPanel stackPanel = new StackPanel();
CheckInfo check = selectedChecks[printItemIndex];
PrintCheck printCheck = BuildPrintCheck(check);
stackPanel.Children.Add(printCheck);
stackPanel.Measure(new Size(args.PrintableArea.Width, double.PositiveInfinity));
if (++printItemIndex < selectedChecks.Count)
args.HasMorePages = true;
args.PageVisual = stackPanel;
I found a workaround to this issue posted here
http://www.thomasclaudiushuber.com/blog/2009/11/25/how-to-print-dynamically-created-images-in-silverlight-4-beta/
Basically instead of putting the Image straight into the page, put a Rectangle and and at run time load the image dynamically, set it as the image source for an image brush and then set the fill property of the rectangle to the image brush.
OK it turned out that SilverLight5 (runtime) has an issue with printing images. The problem does not exist on clients running SilverLight4.
Here is how I fixed it in my code
private void PlaceImages()
{
var logoStreamResourceInfo = Application.GetResourceStream(new Uri("myApp;/Images/logo.png", UriKind.Relative));
var logo = new BitmapImage();
logo.SetSource(logoStreamResourceInfo.Stream);
var logoImageBrush = new ImageBrush();
logoImageBrush.ImageSource = logo;
upperLogo.Fill = logoImageBrush;
lowerLogo.Fill = logoImageBrush;
}
I'm trying to set a background for a grid control in WP7 silverlight, I need to do that programatically, not in the desighn.
I tried something like:
ContentPanel.Background = new BitmapImage(new Uri("Images\Backgrounds\with box\13.jpg", UriKind.Relative));
But of course, I got an error, because on the right hand we should have the type SolidColorBrush.
is there a way to do that?
Thanks..
I would firstly recommend that you use a Canvas instead of a Grid. You can do this by deleting the Grid and inserting a Canvas through the Toolbox -> Drag and Drop.
Then, you can use the code as simple as:
ImageBrush imageBrush = new ImageBrush();
imageBrush.ImageSource = new BitmapImage(new Uri("url", UriKind.Relative));
CanvasName.Background = imageBrush;
That will change the background to whatever you want.
Hope that helps.
From some examples, I think I'm doing this right, but it's not working so I wanted to check here to see. I'm binding my Image source, but the image is not there. If I take away my binding and just set the Image source to the path used in the method below it works fine.
public Image myImage = new Image();
public void someMethod() {
BitmapImage biSource = new BitmapImage();
biSource.BeginInit();
biSource.CacheOption = BitmapCacheOption.OnLoad;
biSource.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
biSource.UriSource = new Uri(#"C:\Images\testimage.jpg");
biSource.DecodePixelWidth = 150;
biSource.EndInit();
myImage.Source = biSource;
}
xaml code
<Image Source="{Binding Path=myImage}" Width="150" Height="150" />
You should bind the Source property to an ImageSource, not an Image. Expose biSource as a property and bind to it instead of myImage
You try to bind an Image to the source of an Image, not going to work. You need to bind the BitmapImage to the source of the Image.
Also the BitmapImage needs to be exposed as public property. If you are new to data binding read this overview on MSDN.
Further you should learn how to debug bindings.
In SL class library MyLib, I have a image say my.png. Then I want to use it in code behind I tried following way:
StreamResourceInfo resourceStream = Application.GetResourceStream(new Uri("/MyLib;component/my.png", UriKind.Relative));
BitmapImage image = new BitmapImage();
image.SetSource(resourceStream.Stream);
this.MyIcon.Source = image;
But it's not woking. I think it's the Uri not set correctly. Help please.
This works:-
BitmapImage image = new BitmapImage(new Uri("/MyLib;component/my.png", UriKind.Relative));
MyIcon.Source = image;
I can't see why you would want to use a Stream here. Having said that your Stream code should work. The build action on the png should be "Resource" and "MyLib" in your Uri should be the Assembly name of the library as found on the "Silverlight" tab of the project properties.
Do you have your image marked as "Resource" in the properties window, or "Content"?
You could always set a style as a resource in your application and then call it like:
Application.Current.Resources["myCoolStyle"] and apply that to the image.
I have a window with a title on it. When the user selects a choice from a drop down list, the title image can change. The problem is when the image loads, it's a blurred, stretched, and pixelated. These are PNG files I'm working with and they look good prior to setting the source dynamically.
Here's the code I'm using to change the image's source.
string strUri2 = String.Format(#"pack://application:,,,/MyAssembly;component/resources/main titles/{0}", CurrenSelection.TitleImage);
Stream iconStream2 = App.GetResourceStream(new Uri(strUri2)).Stream;
imgTitle.Source = HelperFunctions.returnImage(iconStream2);
Here are the helper functions.
public static BitmapImage returnImage(Stream iconStream)
{
Bitmap brush = new Bitmap(iconStream);
System.Drawing.Image img = brush.GetThumbnailImage(brush.Height, brush.Width, null, System.IntPtr.Zero);
var imgbrush = new BitmapImage();
imgbrush.BeginInit();
imgbrush.StreamSource = ConvertImageToMemoryStream(img);
imgbrush.CreateOptions = BitmapCreateOptions.PreservePixelFormat;
imgbrush.EndInit();
var ib = new ImageBrush(imgbrush);
return imgbrush;
}
public static MemoryStream ConvertImageToMemoryStream(System.Drawing.Image img)
{
var ms = new MemoryStream();
img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
return ms;
}
And the XAML
<Image x:Name="imgTitle" HorizontalAlignment="Left" VerticalAlignment="Bottom" Grid.Column="1" Grid.Row="1" Stretch="None" d:IsLocked="False"/>
And for Ref:
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
Anyone have any ideas what's up?
I can think of two things:
First, try loading the image with:
string strUri2 = String.Format(#"pack://application:,,,/MyAseemby;component/resources/main titles/{0}", CurrenSelection.TitleImage);
imgTitle.Source = new BitmapImage(new Uri(strUri2));
Maybe the problem is with WinForm's image resizing, if the image is stretched set Stretch on the image control to "Uniform" or "UnfirofmToFill".
Second option is that maybe the image is not aligned to the pixel grid, you can read about it on my blog at http://www.nbdtech.com/blog/archive/2008/11/20/blurred-images-in-wpf.aspx
Hey, this one is kind of ugly but it's one line only:
imgTitle.Source = new BitmapImage(new Uri(#"pack://application:,,,/YourAssembly;component/your_image.png"));
Here is how it worked beautifully for me.
In the window resources add the image.
<Image x:Key="delImg" >
<Image.Source>
<BitmapImage UriSource="Images/delitem.gif"></BitmapImage>
</Image.Source>
</Image>
Then the code goes like this.
Image img = new Image()
img.Source = ((Image)this.Resources["delImg"]).Source;
"this" is referring to the Window object
Like for me -> working is:
string strUri2 = Directory.GetCurrentDirectory()+#"/Images/ok_progress.png";
image1.Source = new BitmapImage(new Uri(strUri2));
Me.imgAddNew.Source = New System.Windows.Media.Imaging.BitmapImage(New Uri("/SPMS;component/Images/Cancel__Red-64.png", UriKind.Relative))
Try Stretch="UniformToFill" on the Image