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C# WPF Dynamic Button STYLE that has different pictures based on the x:name or x:key they have

I would like to make a game like Shakes & Fidgets. I got stuck at the Main menu, where I already overcomplicated stuff as I always do. I made a grid layout, where I will put the buttons, but every button is a picture. I use ImageBrush for every button's picture I want to create.
I would like to create ONE style for every button so they change their backgrounds based on the x:Name or x:Key they have. So a Button with x:Name or x:Key "PlayGame" would find it's as the PlayGame.png, PlayGame_Hover, PlayGame_OnClick where "PlayGame" is a variable.
In other words I would like to have a style that can filter the x:name, or x:key of a button, and uses it as a variable later on so I can do this: {StaticResource VARIABLENAME}
The Code I have now is:
<ImageBrush x:Key="PlayGame">
<ImageBrush.ImageSource>
<BitmapImage UriSource="./Pictures/PlayGameButton.png"/>
</ImageBrush.ImageSource>
</ImageBrush>
<ImageBrush x:Key="PlayGame_Hover">
<ImageBrush.ImageSource>
<BitmapImage UriSource="./Pictures/PlayGameButton_Hover.png"/>
</ImageBrush.ImageSource>
</ImageBrush>
<ImageBrush x:Key="PlayGame_OnClick">
<ImageBrush.ImageSource>
<BitmapImage UriSource="./Pictures/PlayGameButton_OnClick.png"/>
</ImageBrush.ImageSource>
</ImageBrush>
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="{StaticResource PlayGame}" />
<Setter Property="FontSize" Value="15" />
<Setter Property="SnapsToDevicePixels" Value="True" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border CornerRadius="4" Background="{TemplateBinding Background}">
<Grid>
<ContentPresenter x:Name="MyContentPresenter" Content="{TemplateBinding Content}" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,0,0,0" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="{StaticResource PlayGame_Hover}" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Background" Value="{StaticResource PlayGame_OnClick}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

I found a not very effective solution, but not the one I actually want
You can give the Style an
x:Key="styleKey"
and you have to give the button this part:
Style="{StaticResource styleKey}"
This way you will have to make a style for every different button you want to have, but it will work, and you will be happy about it if efficency is not key.:D

change background toggle button

I try to change the background of a toggle button everytime when it is checked or not,using 2 pictures. At runtime, the toggle button is simple and I don't see any image. This is my code:
<Canvas Height="25" Name="canvas1" Width="186" Background="White">
<ToggleButton Name="toggle1" Height="25" Padding="0" Width="27" Canvas.Left="131" Canvas.Top="0" BorderBrush="{x:Null}" Foreground="{x:Null}">
<ToggleButton.Resources>
<Style x:Key="OnOffToggleImageStyle" TargetType="ToggleButton">
<Style.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="/WpfApp;component/Images/image1.png" Stretch="Uniform" TileMode="None" />
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="IsChecked" Value="False">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="/WpfApp;component/Images/image2.png" Stretch="Uniform" TileMode="None" />
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>

Multiple things we can point here.
Firstly you're specifying the Style in ToggleButton.Resources with a x:Key. Thus it's not implicitly set. Setting a Style in resources of the item for which it applies in it's own scope is kinda weird. Rather just apply the Style directly as <ToggleButton.Style>.
Next, when working with Style.Triggers, make it a practice to specify a default Setter. This will prevent some headache for you. Also now instead of having two triggers for IsChecked=False/True, you only need one trigger as the other Background can be set as default.
Finally it seems like all you need from the ToggleButton is the IsChecked property and switch an Image. So just override the Template and provide a simple one yourself. This way you assure the behavior to stay consistent in all version of the OS and not rely on internal default template's working nicely for your customization(which wouldn't work in Windows-8 btw, what you're trying here for IsChecked=True due to internal overrides in default ControlTemplate)
So putting this all together we get:
<Style x:Key="MyToggleButtonStyle"
TargetType="ToggleButton">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="/WpfApp;component/Images/image2.png"
Stretch="Uniform"
TileMode="None" />
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Border Width="{TemplateBinding Width}"
Height="{TemplateBinding Height}"
Background="{TemplateBinding Background}" />
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsChecked"
Value="True">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="/WpfApp;component/Images/image1.png"
Stretch="Uniform"
TileMode="None" />
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
and apply it to your ToggleButton
<ToggleButton Name="toggle1" Height="25" Padding="0" Width="27" Canvas.Left="131" Canvas.Top="0" BorderBrush="{x:Null}" Foreground="{x:Null}" Style="{DynamicResource MyToggleButtonStyle}">
you can ofc remove the Key in the Style and make it implicitly apply to "all" ToggleButton's within the scope of the Style definition if you choose to.

Can you check if the build action for your images is Embedded Resource please?

Define the style directly for your togglebutton like below. it should fix your issue:
<ToggleButton>
<ToggleButton.Style>
<Style TargetType="ToggleButton">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="/WpfApp;component/Images/image2.png" Stretch="Uniform" TileMode="None" />
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="/WpfApp;component/Images/image1.png" Stretch="Uniform" TileMode="None" />
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</ToggleButton.Style>
</ToggleButton>

You should remove the x:Key and it will work.

WPF change Image when mouse hover on button

I'm trying to change the image when mouse is over a button, but it's not working here is what am trying to do :
<Button x:Name="Play" Content="" ClickMode="Press" BorderThickness="0" UseLayoutRounding="True" Height="120" Width="224">
<Button.Background>
<ImageBrush ImageSource="Resources/Play 1.gif"/>
</Button.Background>
<Button.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="ImageBrush.ImageSource" Value="Resources/Play 2.gif"></Setter>
</Trigger>
</Button.Triggers>
</Button>
But this gives me this error : Triggers collection members must be of type EventTrigger.
How would I make it work?

It's correct - you can only put EventTriggers in there. You need to move your Trigger into the button's Style:
<Button x:Name="Play" Content="" ClickMode="Press" BorderThickness="0" UseLayoutRounding="True" Height="120" Width="224">
<Button.Style>
<Style TargetType="{x:Type Button}">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="..\Resources\Play 1.gif"/>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="..\Resources\Play 2.gif"/>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
Something like that, I think (haven't tested it).
EDIT: This switches between the correct images, but it doesn't work correctly (it starts off with Play 1.gif, transitions to Play 2.gif, but then transitions to the button's underlying colour). I think you'll have to override the button's ControlTemplate to prevent this from happening, as suggested in the comments.

<Window x:Class="Image_ChangeOnHover"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Image_ChangeOnHover" Height="300" Width="300">
<Grid>
<Image Stretch="None" Margin="10">
<Image.Resources>
<Style TargetType="{x:Type Image}">
<!-- Default image -->
<Setter Property="Source" Value="/Resources/Off2.png"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<!-- Hover image -->
<Setter Property="Source" Value="/Resources/On.png"/>
</Trigger>
</Style.Triggers>
</Style>
</Image.Resources>
</Image>
</Grid>
</Window>

Drop Shadow Effect or blur effect only on Image on-hovering in WPF/XAML

I have an image with a shadow property defined as follows.
<Border Background="Black" Margin="42,180,368,38">
<Border.Effect>
<DropShadowEffect Color="Aqua" Opacity="0.5"/>
</Border.Effect>
<Image Height="92" Width="97" Source="/Images/image_search.png" />
</Border>
This produces image with a border. OK. But, I need the border to be shown only on image-hovering? How do I do that ? Also, how to blur the image on-hovering upon it?
Many Thanks.

You can do this with styles and triggers.
<Border Margin="42,180,368,38">
<Border.Style>
<Style TargetType="Border">
<Setter Property="Background" Value="{x:Null}"/>
<Setter Property="BorderThickness" Value="0"/>
<Style.Triggers>
<Trigger Property="Border.IsMouseOver" Value="True">
<Setter Property="Background" Value="Black"/>
<Setter Property="Effect">
<Setter.Value>
<DropShadowEffect Color="Aqua" Opacity="0.5"/>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Border.Style>
<Image Height="92" Width="97" Source="/Images/image_search.png" />
</Border>
The first Setter within the Style explicitly sets the background color to null and the border thickness to '0' to "hide" the border. The Trigger sets the borders background property when the IsMouseOver Property of the border control is set to true.

Styles and Triggers in TextBox

I'm trying to add OuterGlowBitmapEffect effect to TextBox when Mouse hovers it.
I use triggers. Here is some code:
<TextBox Height="23" HorizontalAlignment="Left" Style="{DynamicResource TextBoxStyle}" Margin="12,283,0,0" Name="textBox1" VerticalAlignment="Top" Width="147" Text="" />
<Style x:Key="TextBoxStyle" TargetType="{x:Type TextBox}">
<Setter Property="FontSize" Value="14" />
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="BitmapEffect">
<Setter.Value>
<OuterGlowBitmapEffect GlowColor="Red" GlowSize="10"/>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
But it's not working. What i missed?

From the documentation of BitmapEffect:
[ObsoleteAttribute("BitmapEffects are deprecated and no longer function. Consider using Effects where appropriate instead.")]
You can simulate a glow using the Effect property with an instance of DropShadowEffect.

try this
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Effect">
<Setter.Value>
<DropShadowEffect BlurRadius="10" Color="Red" ShadowDepth="0"/>
</Setter.Value>
</Setter>
</Trigger>