WPF进度条中的错误颜色

Question

EDIT: I solved my issue...take a look at my answer. Correct if it's wrong. Thanks.

Question: For some reason it seems that the progress bar in a WPF app isn't showing the color I require.

Here's the XAML code:

<Window x:Class="TaskbarProgressApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Window.TaskbarItemInfo>
        <TaskbarItemInfo />
    </Window.TaskbarItemInfo>
    <Grid>
        <ProgressBar x:Name="ProgressBar"
                     Margin="10"
                     HorizontalAlignment="Stretch"
                     VerticalAlignment="Center"
                     Height="23" Background="{x:Null}" Foreground="DarkRed">
        </ProgressBar>
    </Grid>
</Window>

Here's the result:

Doesn't look like Dark Red to me...happens to every color :(

Any thoughts ?

Answer 1

Thanks to @Merlyn Morgan-Graham and @CharithJ for pointing out the other question, I thought it was a different one when I read it.

I solved the problem and I wanted to share it.

I downloaded the Trial of MS Expression Blend and changed:

<Trigger Property="IsIndeterminate" Value="false">
    <Setter Property="Background" TargetName="Animation" Value="#80B5FFA9"/>
</Trigger>

To

<Trigger Property="IsIndeterminate" Value="false">
    <Setter Property="Background" TargetName="Animation" Value="#00000000"/>
</Trigger>

This gives the colors as they are:

Dark Red:

Even this works

<Trigger Property="IsIndeterminate" Value="true">
    <Setter Property="Background" TargetName="Animation" Value="#80B5FFA9"/>
</Trigger>

Doesn't change the progress bar but the colors are as they should be.

It's sad that there is no option to change it directly.

Thanks for the help.

Answer 2

You can do this by changing the control template. Here is an article on that from MSDN. ProgressBar ControlTemplate Example

Here is another similar thread.