Develop Reference

Any way to load an online image into a richtextbox

I am trying to set an image into a richtextbox.
Can this be done and if so how?
Will I have to use an online textbox and load it into my form using the webbrowser, such as with monaco?
Using the properties menu, I do not see anything about images in the richtextbox, only backcolor, so I tried changing the backcolor to "transparent" because I thought of putting an imagebox under it and setting the link of the image there(say this one: https://media.tenor.com/images/cdcf2410001a5c02bcd371d13743aa57/tenor.gif)
Can anyone help me with this?

In WPF, you can add a BlockUIContainer to the document of your richtextbox. This allows you to input an IElement and display it as part of the document. This is great because that means you can input a picture here aswell.
https://learn.microsoft.com/en-us/dotnet/api/system.windows.documents.blockuicontainer?view=netframework-4.8
Sample:
<RichTextBox HorizontalAlignment="Center" Height="100" VerticalAlignment="Center" Width="100" BorderBrush="Gray">
<FlowDocument>
<BlockUIContainer>
<!-- Here you can input any wpf controls, like the Image control. -->
<Image Height="100" Width="100" Source="C:\Some\Image.png" Stretch="Fill"/>
</BlockUIContainer>
</FlowDocument>
</RichTextBox>
Here's an stackoverflow answer that shows how to add an image from the web:
Showing image in WPF using the URL link from database

How to set button in side stackpanel to right edge in windows 10 universal app development

I an new to windows app development,i searched for this but not found any where.I need the button at right edge and Stretch the textbox till buttons start.But I am unable to set the button to Right edge.
How to acheve this.

A stackpanel works like a container. If you define layout properties on your stackpanel, then the objects inside your stackpanel cannot be displayed outside of the stackpanel's limits.
For example :
If I set my row and column number in my stackpanel,
<StackPanel Grid.Row="0" Grid.Column="2" Name="Version" Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Top">
<Label Grid.Column="4" Grid.Row="6" Name="Ver" Content="V." HorizontalAlignment="Right" />
<TextBlock Name="Vers" Text="1.0" TextAlignment="Right" />
</StackPanel>
Then the row/column properties set on my label are ignored and the 'HorizontalAlignment="Right"' will place my label on the right side of the stackpanel, not the grid.
A solution may be to remove your button from your stackpanel, you are then free to place your button anywhere on the grid.
Another solution can be to expand your stackpanel's limits.
To do so, you can use the Grid.ColumnSpan property or simply set your stackpanel on the right of the grid.
Hope that helped.

Most simple FrameworkElement to handle HorizontalAlignment and VerticalAlignment?

This is Silverlight.
Initial goal is to display a random element in a Popup with some VerticalAlignment and HorizontalAlignment. I do not want to use VerticalOffset or HorizontalOffset, because there is more to what I really want to do, including some complex bindings.
First attempt was:
<Popup>
<Button
Height="135"
HorizontalAlignment="Stretch"
VerticalAlignment="Bottom" />
</Popup>
Second attempt was:
<Popup
Height="135"
HorizontalAlignment="Stretch"
VerticalAlignment="Bottom">
<Button />
</Popup>
Both were a failure: the Button was always on Top and not Stretch (HorizontalAlignment and VerticalAlignment didn't work).
So I had the idea to encapsulate the element in a simple FrameworkElement:
<Popup>
<Border>
<Button
Height="135"
HorizontalAlignment="Stretch"
VerticalAlignment="Bottom" />
</Border>
</Popup>
And it is working.
But I had to use Border in this example, when I could have done it with Grid and many other FrameworkElement (but not with Canvas or Viewbox or Popup). I'd like to know what is the most simple, efficient and processor-friendly transparent FrameworkElement to encapsulate another element with working HorizontalAlignment and VerticalAlignment? Is it:
Border? (like the above example)
UserControl?
ContentControl?
ContentContainer?
some custom and basic MyFrameworkElement? (might need help for most basic implementation)
something else like Grid?

WPF controls come in two flavors: Ones that interact with users (like accept user clicks like a button, or display text like a text block) and containers that control placement and layout of the previous ones.
Container controls are usually designed to lay out their children in a specific manner. For example, Canvases lay out children by X, Y, Width & Height values. Each one has a specific use, so you must read the documentation or tutorials for these container controls and understand how each works in order to select the appropriate one for a task.
In your case, you want the button to fill all available space in the popup (it seems, it isn't that clear). I know that the Grid does this by default. So I would do the following:
<Popup><Grid><Button /></Grid></Popup>

Border for WebBrowser control

First i have created a web browser control(full screen sized) and then i have created a border above the web browser control but when i debugged it, the border is not visible. Need help? Thanks in advance for your hard work!
<Border x:Name="UrlBorder" Background="{StaticResource PhoneAccentBrush}" CornerRadius="8">
<TextBox x:Name="UrlTextBox" Background="White" InputScope="URL" Margin="0,0,98,0"/>
</Border>
<phone:WebBrowser x:Name="BrowserHost" Margin="0,12,0,0" Grid.RowSpan="2" GotFocus="BrowserHost_GotFocus" IsScriptEnabled="True" />

Not sure what you are trying to do here. Looks like you want an url input textbox surrounded by border on top of a nearly-fullscreen web browser element. If so, I would use a stackpanel.
<StackPanel>
<Border><TextBox /></Border>
<WebBrowser/>
</StackPanel>
If you want to hide the url input, you can still set the Border's visibility to Collapsed.
Elements in grid can overlap each other. So, the webbrowser element will cover your bordered textbox if it's fullscreen. Also, neither your border, nor your textbox has explicit height nor width.

Editing child objects of a combo box using c# and Wpf

Backgorund
I am currently writing a program that allows a user to select a manufacture from a combo box. The combo box is created in wpf using the following wpf code segment:
<ComboBox Height="23" Margin="40.422,128.423,229.908,0" Name="itemProductManufacture" ToolTip="Click to open drop down menu" VerticalAlignment="Top" Text="Select A Manufacture" SelectionChanged="itemProductManufacture_SelectionChanged" DropDownOpened="itemProductManufacture_DropDownOpened">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding ManufactureId}" Width="0"/>
<Image Name="itemManufactureImage" Source="{Binding ManufactureImage}" Height="15" Width="70" Stretch="Uniform"/>
<TextBlock Text="{Binding ManufactureName}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
The data is provided form a database and each entry has a Image, a name and an Id (intentionally not shown)
Problem
I am trying to code the behaviour of the combo box so when it is open the image height is 50 and when it is closed it is 15 this is so the image is larger when it is first displayed and then smaller once selected so it doesn't take up too much space on the form.
I have tried editing the image propities using code but am unable to accsess it using its name or any other children of the combo box.
Thanks
Jonathan

As you are using data template you won't be able to access the directly by its name.
Try something like this -
Image image = this.itemProductManufacture.ItemTemplate.FindName("itemManufactureImage", this) as Image;
One thing I am not clear is whether you want to change image size for all the items or the selected one? If you need to access the image for a particulat item in combobox you may have to use the ItemContainerGenerator.ContainerFromItem, as explained in following posts -
WPF - ItemsControl - How do I get find my "CheckBox" item that is in the ItemTemplate?
http://www.sitechno.com/Blog/HowToUseAttachedPropertiesAsAnExtensionMechanismForACheckedListbox.aspx
look at this, To know the various ways of finding controls - How can I find WPF controls by name or type?

You can edit image properties from code using binding. Or you can use triggers in Datatemplate. When comboboxitems checked properties change, you can change height property of corresponding image

Try this:
<Image Height = "{Binding Path=IsDropDownOpen,
RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type ComboBox}},
Converter={StaticResource myBoolToHeightConverter}}" />
An example for Converter here