Hint is not appearing for PhoneTextBox by applying following style in Windows Phone8?

Question

<Style x:Key="chatTextBox" TargetType="toolkit:PhoneTextBox">
        <Setter Property="FontFamily" Value="{StaticResource PhoneFontFamilyNormal}" />
        <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeMediumLarge}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="Foreground" Value="{StaticResource PhoneTextBoxForegroundBrush}" />
        <Setter Property="BorderBrush" Value="{StaticResource PhoneTextBoxBrush}" />
        <Setter Property="SelectionBackground" Value="Transparent" />
        <Setter Property="SelectionForeground" Value="Transparent" />
        <Setter Property="Hint" Value="Enter Message" />
        <Setter Property="BorderThickness" Value="{StaticResource PhoneBorderThickness}" />
        <Setter Property="Padding" Value="2" />
        <Setter Property="Template">
        <Setter.Value>
        <ControlTemplate TargetType="toolkit:PhoneTextBox">
        <Grid Background="Transparent">
        <VisualStateManager.VisualStateGroups>
        <VisualStateGroup x:Name="CommonStates">
        <VisualState x:Name="Normal" />
        <VisualState x:Name="MouseOver" />
        <VisualState x:Name="Disabled">
        <Storyboard>
        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="EnabledBorder" Storyboard.TargetProperty="Visibility">
        <DiscreteObjectKeyFrame KeyTime="0">
        <DiscreteObjectKeyFrame.Value>
        <Visibility>Collapsed</Visibility>
        </DiscreteObjectKeyFrame.Value>
        </DiscreteObjectKeyFrame>
        </ObjectAnimationUsingKeyFrames>
        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="DisabledOrReadonlyBorder" Storyboard.TargetProperty="Visibility">
        <DiscreteObjectKeyFrame KeyTime="0">
        <DiscreteObjectKeyFrame.Value>
        <Visibility>Visible</Visibility>
        </DiscreteObjectKeyFrame.Value>
        </DiscreteObjectKeyFrame>
        </ObjectAnimationUsingKeyFrames>
        </Storyboard>
        </VisualState>

        </VisualStateGroup>
        <VisualStateGroup x:Name="FocusStates">
        <VisualState x:Name="Focused" />


        <VisualState x:Name="Unfocused" />
        </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
        <Border x:Name="EnabledBorder"
        Margin="{StaticResource PhoneTouchTargetOverhang}"
        Background="{TemplateBinding Background}"
        BorderBrush="{TemplateBinding BorderBrush}"
        BorderThickness="{TemplateBinding BorderThickness}">
        <ContentControl x:Name="ContentElement"
        Margin="{StaticResource PhoneTextBoxInnerMargin}"
        HorizontalContentAlignment="Stretch"
        VerticalContentAlignment="Stretch"
        BorderThickness="0"
        Padding="{TemplateBinding Padding}" />
        </Border>
        <Border x:Name="DisabledOrReadonlyBorder"
        Margin="{StaticResource PhoneTouchTargetOverhang}"
        Background="Transparent"
        BorderBrush="{StaticResource PhoneDisabledBrush}"
        BorderThickness="{TemplateBinding BorderThickness}"
        Visibility="Collapsed">
        <TextBox x:Name="DisabledOrReadonlyContent"
        Background="Transparent"
        FontFamily="{TemplateBinding FontFamily}"
        FontSize="{TemplateBinding FontSize}"
        FontStyle="{TemplateBinding FontStyle}"
        FontWeight="{TemplateBinding FontWeight}"
        Foreground="{StaticResource PhoneDisabledBrush}"
        IsReadOnly="True"
        SelectionBackground="{TemplateBinding SelectionBackground}"
        SelectionForeground="{TemplateBinding SelectionForeground}"
        Text="{TemplateBinding Text}"
        TextAlignment="{TemplateBinding TextAlignment}"
        TextWrapping="{TemplateBinding TextWrapping}" />
        </Border>
        </Grid>
        </ControlTemplate>
        </Setter.Value>
        </Setter>
        </Style>  

I used above code for remove background focused color for PhoneTextBox which is in toolkit.Everything is fine but, hint is not appearing.After applying this style. If anybody helps me highly appreciated.

Answer 1

As per your needs, I just created the style for PhoneTextBox and apply this style for it. Background will be transparent in normal and also in focused state.

<Style x:Key="PhoneTextBoxStyle1" TargetType="toolkit:PhoneTextBox">
        <Setter Property="FontFamily" Value="{StaticResource PhoneFontFamilyNormal}"/>
        <Setter Property="FontSize" Value="{StaticResource PhoneFontSizeMediumLarge}"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="Foreground" Value="{StaticResource WhiteBrush}"/>
        <Setter Property="BorderBrush" Value="{StaticResource PhoneTextBoxBrush}"/>
        <Setter Property="SelectionBackground" Value="{StaticResource PhoneAccentBrush}"/>
        <Setter Property="SelectionForeground" Value="{StaticResource PhoneTextBoxSelectionForegroundBrush}"/>
        <Setter Property="BorderThickness" Value="{StaticResource PhoneBorderThickness}"/>
        <Setter Property="Hint" Value="sample"/>
        <Setter Property="HintStyle" Value="{StaticResource HintCustomStyle}"/>
        <Setter Property="Padding" Value="{StaticResource PhoneBorderThickness}"/>

        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="toolkit:PhoneTextBox">
                    <Grid x:Name="RootGrid" Background="Transparent">
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Normal"/>
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="HintBorder">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Collapsed</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="TextBorder">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Visible</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="TextBorder">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="Transparent"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Margin" Storyboard.TargetName="TextBorder">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="HorizontalAlignment" Storyboard.TargetName="Text">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <HorizontalAlignment>Stretch</HorizontalAlignment>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="FocusStates">
                                <VisualState x:Name="Focused">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="HintBorder">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="Transparent"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="HintBorder">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneTextBoxEditBorderBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Unfocused"/>
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="LengthIndicatorStates">
                                <VisualState x:Name="LengthIndicatorVisible">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="LengthIndicator">
                                            <DiscreteObjectKeyFrame KeyTime="0:0:0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Visible</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Margin" Storyboard.TargetName="RootGrid">
                                            <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="0, 0, 0, 27"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="LengthIndicator">
                                            <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="0.6"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <DoubleAnimation Duration="0:0:0.350" To="32" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.Y)" Storyboard.TargetName="LengthIndicator">
                                            <DoubleAnimation.EasingFunction>
                                                <ExponentialEase Exponent="6"/>
                                            </DoubleAnimation.EasingFunction>
                                        </DoubleAnimation>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="LengthIndicatorHidden">
                                    <Storyboard>
                                        <DoubleAnimation Duration="0:0:0.350" To="0" Storyboard.TargetProperty="(UIElement.RenderTransform).(TranslateTransform.Y)" Storyboard.TargetName="LengthIndicator">
                                            <DoubleAnimation.EasingFunction>
                                                <ExponentialEase Exponent="6"/>
                                            </DoubleAnimation.EasingFunction>
                                        </DoubleAnimation>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Margin" Storyboard.TargetName="RootGrid">
                                            <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="0, 0, 0, 0"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity" Storyboard.TargetName="LengthIndicator">
                                            <DiscreteObjectKeyFrame KeyTime="0:0:0.350" Value="0"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="LengthIndicator">
                                            <DiscreteObjectKeyFrame KeyTime="0:0:0.350">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Collapsed</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                        <Border x:Name="LengthIndicatorBorder">
                            <TextBlock x:Name="LengthIndicator" Foreground="{StaticResource PhoneContrastBackgroundBrush}" FontSize="{StaticResource PhoneFontSizeNormal}" HorizontalAlignment="Right" Margin="{StaticResource PhoneMargin}" Opacity="0" TextAlignment="Right" VerticalAlignment="Bottom">
                                <TextBlock.RenderTransform>
                                    <TranslateTransform/>
                                </TextBlock.RenderTransform>
                            </TextBlock>
                        </Border>
                        <Border x:Name="HintBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Margin="{StaticResource PhoneTouchTargetOverhang}">
                            <Grid>
                                <ContentControl x:Name="HintContent" Background="Transparent" Content="{TemplateBinding Hint}" HorizontalAlignment="Left" Margin="3,0,3,0" Style="{TemplateBinding HintStyle}" Visibility="{TemplateBinding ActualHintVisibility}" VerticalAlignment="Center"/>
                                <ContentControl x:Name="ContentElement" BorderThickness="0" HorizontalContentAlignment="Stretch" Margin="{StaticResource PhoneTextBoxInnerMargin}" Padding="{TemplateBinding Padding}" VerticalContentAlignment="Stretch"/>
                            </Grid>
                        </Border>
                        <Border x:Name="TextBorder" BorderBrush="{StaticResource PhoneDisabledBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="Transparent" Margin="{StaticResource PhoneTouchTargetOverhang}" Visibility="Collapsed">
                            <TextBox x:Name="Text" Foreground="{StaticResource PhoneDisabledBrush}" FontWeight="{TemplateBinding FontWeight}" FontStyle="{TemplateBinding FontStyle}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" HorizontalAlignment="Left" SelectionForeground="{TemplateBinding SelectionForeground}" SelectionBackground="{TemplateBinding SelectionBackground}" TextAlignment="{TemplateBinding TextAlignment}" TextWrapping="{TemplateBinding TextWrapping}" Text="{TemplateBinding Text}"/>
                        </Border>
                        <Border x:Name="ActionIconBorder" Background="Transparent" HorizontalAlignment="Right" Height="72" VerticalAlignment="Bottom" Width="84">
                            <Image x:Name="ActionIcon" Height="26" Source="{TemplateBinding ActionIcon}" Width="26"/>
                        </Border>
                        <TextBlock x:Name="MeasurementTextBlock" FontWeight="{TemplateBinding FontWeight}" FontStyle="{TemplateBinding FontStyle}" FontStretch="{TemplateBinding FontStretch}" FontSize="{TemplateBinding FontSize}" FontFamily="{TemplateBinding FontFamily}" IsHitTestVisible="False" Margin="8" Opacity="0" TextAlignment="{TemplateBinding TextAlignment}" TextWrapping="{TemplateBinding TextWrapping}" Text="{TemplateBinding Text}"/>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

Finally add the following code as your Hint style.

<Style TargetType="ContentControl" x:Key="HintCustomStyle">
        <Setter Property="FontFamily" Value="Calibri"/>
        <Setter Property="Foreground" Value="Aqua"/>
        <Setter Property="FontSize" Value="30"/>
    </Style>

Change HintCustomStyle, if you want to customize Hint Style.