Develop Reference

how to set background of grid

I have a BitmapImage, and want to set it as Background of Grid. I have tried this
xaml:
<Grid x:Name="ContentPanel">
<Grid.Background>
<ImageBrush x:Name="imgBg" />
</Grid.Background>
</Grid>
c#:
BitmapImage bmp = new BitmapImage();
bmp.DecodePixelWidth =(int) scrnWidth;
bmp.DecodePixelHeight = (int)scrnHeight;
bmp.SetSource(e.ChosenPhoto);
ImageBrush ib = new ImageBrush() { ImageSource = bmp };
imgBg.ImageSource = ib.ImageSource;
Output: Output is just black.
Question: using above code I am unable to set bitmapimage as background of Grid element, Am I missing something ?
Update I knew, it works fine when we set image as background to grid like:
ImageBrush ib = new ImageBrush() { ImageSource = bmp };
ContentPanel.Background = ib;
But I need to use xaml way, Question is same.

<Grid x:Name="ContentPanel">
<Grid.Background>
<ImageBrush Stretch="None"
ImageSource="Your Path/source"
AlignmentY="Center"
AlignmentX="Center" />
</Grid.Background>
</Grid>
This might help you, cant promise you it will but try it. was found on this post.
Here

how to change resource in wpf by code in c#?

Having the next XAML code
<Window.Resources >
<ImageBrush x:Key="tile" ImageSource="afraid.png"
Opacity=" 20" TileMode="Tile"
ViewportUnits="Absolute"
Viewport=" 0,0,32,32"
></ImageBrush>
</Window.Resources>
I want to change the image by c# code, during the run-time
I have the next code to do this, but the code does not work & I don`t know the reason:
ImageBrush img = ( ImageBrush )this.FindResource( "tile" );
ImageSourceConverter conv = new ImageSourceConverter();
ImageSource src = ( ImageSource )conv.ConvertFromString( "mad.png" );
img.ImageSource = src;

Please refer to this answer.
Try this, create a BitmapImage from a file and set it as the ImageSource of the ImageBrush.
ImageBrush img = (ImageBrush)this.FindResource("tile");
//change the imagesource in runtime,
img.ImageSource = new BitmapImage(new Uri("mad.png", UriKind.Relative));

How to add grid background Image in c#

I am trying to change images source or image background in c# when a button is click with xaml design UI.
<Grid x:Name="gridimage">
<Image x:Name="Image" stretch="Fill"/>
</Grid>
private void Button1_click(object sender, RoutedEventArgs e)
{
// NOT WORKING FOR ME
gridimage.Source = new BitmapImage (new Uri("location"));
gridimage.Background = ?
}

Assumed that there is an Assets folder in your Visual Studio project that contains an image file 2.png, and that the image file's Build Action is set to Resource, you would create a BitmapImage in code behind from a Pack URI like this:
var uri = new Uri("pack://application:,,,/Assets/2.png");
var bitmap = new BitmapImage(uri);
Then you would use the BitmapImage as Source of your Image control:
Image.Source = bitmap;
Or use it with an ImageBrush as Background of your Grid:
gridimage.Background = new ImageBrush(bitmap);

How to set Image Source in C# to XAML Static Resource programmatically?

I have this ResourceDictionary in Main.xaml:
<Window.Resources>
<ResourceDictionary>
<BitmapImage x:Key="Customer" UriSource="Icons/customer.png"/>
<BitmapImage x:Key="Project" UriSource="Icons/project.png"/>
<BitmapImage x:Key="Task" UriSource="Icons/task.png"/>
</ResourceDictionary>
</Window.Resources>
I initially set the image using:
<Image Name="TypeIcon" HorizontalAlignment="Left" VerticalAlignment="Center"
Source="{StaticResource Customer}" Height="16" Width="16"/>
I'm trying to change TypeIcon's Source from Customer to Project in a C# method.
I've tried using:
TypeIcon.Source = "{StaticResource Project}";
But I get this error:
Cannot implicitly convert type string to System.Windows.Media.ImageSource
I've tried defining the image using new ImageSource(), but this doesn't work either.
How can I change the image's Source programmatically in C#?

After much Googling, whilst writing this question, I figured out how to do it:
TypeIcon.Source = (ImageSource) Resources["Project"];

It is not for static resources but perhaps will be useful anyway... :)
i.e. how to set background for Grid dynamically
var myBrush = new ImageBrush();
var image = new Image
{
Source = new BitmapImage(
new Uri(
"pack://application:,,,/YourAppName;component/Images/Boo.png"))
};
myBrush.ImageSource = image.Source;
MainGrid.Background = myBrush;
i.e. how to set icon of the app dynamically
var idleIco = new Image
{
Source = new BitmapImage(
new Uri(
"pack://application:,,,/YourAppName;component/Images/idle.ico"))
};
SomeObjectYouAreUsingToSet.IconSource =idleIco.Source;

You can use the ImageSourceConverter class to get what you want, for example:
img1.Source = (ImageSource)new ImageSourceConverter().ConvertFromString("/Assets/check.png");

Bind Xaml bitmap image

I have bitmap image variable and i want to bind it to my xaml window.
System.Reflection.Assembly thisExe;
thisExe = System.Reflection.Assembly.GetExecutingAssembly();
string[] resources = thisExe.GetManifestResourceNames();
var stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("SplashDemo.Resources.Untitled-100000.png");
Bitmap image = new Bitmap(stream);
And this is my xaml code
<Image Source="{Binding Source}" HorizontalAlignment="Left" Height="210" Margin="35,10,0,0" VerticalAlignment="Top" Width="335">
</Image>
can u assist me binding this bitmap variable to this xaml image by C# code?

If you really want to set it from C# code and not from inside XAML, you should use this easy solution described further on the MSDN reference:
string path = "Resources/Untitled-100000.png";
BitmapImage bitmap = new BitmapImage(new Uri(path, UriKind.Relative));
image.Source = bitmap;
But first, you need to give your Image a name so you can reference it from c#:
<Image x:Name="image" ... />
No need to reference Windows Forms classes.
If you insist on having the Image embedded into your Assembly, you need the following more lengthy code to load the image:
string path = "SplashDemo.Resources.Untitled-100000.png";
using (Stream fileStream = GetType().Assembly.GetManifestResourceStream(path))
{
PngBitmapDecoder bitmapDecoder = new PngBitmapDecoder(fileStream,
BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
ImageSource imageSource = bitmapDecoder.Frames[0];
image.Source = imageSource;
}

Here is some sample code:
// Winforms Image we want to get the WPF Image from...
System.Drawing.Image imgWinForms = System.Drawing.Image.FromFile("test.png");
// ImageSource ...
BitmapImage bi = new BitmapImage();
bi.BeginInit();
MemoryStream ms = new MemoryStream();
// Save to a memory stream...
imgWinForms.Save(ms, ImageFormat.Bmp);
// Rewind the stream...
ms.Seek(0, SeekOrigin.Begin);
// Tell the WPF image to use this stream...
bi.StreamSource = ms;
bi.EndInit();
Click here to view reference

If you are using WPF, right click your image in your project and set the Build Action to Resource. Assuming your image is called MyImage.jpg and is in a Resources folder in your project, you should be able to reference it directly in your xaml without using any C# code. Like this:
<Image Source="/Resources/MyImage.jpg"
HorizontalAlignment="Left"
Height="210"
Margin="35,10,0,0"
VerticalAlignment="Top"
Width="335">
</Image>