WPF TextBox 在焦点上改变颜色
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WPF TextBox change color on focus
提问by Ivan
I try to change color on my input box when is focused.
我尝试在聚焦时更改输入框的颜色。
First I declare input button:
首先我声明输入按钮：
<TextBox x:Name="usernameTextBox"
HorizontalAlignment="Left"
Height="23"
Margin="115,31,0,0"
TextWrapping="Wrap"
VerticalAlignment="Top"
Width="277"
GotFocus="usernameTextBox_GotFocus"/>
And below I try to add style for that textbox
下面我尝试为该文本框添加样式
<Style x:Key="usernameTextBox"
TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="IsFocused"
Value="true">
<Setter Property="Background"
Value="{StaticResource OnMouseOverColor}" />
</Trigger>
</Style.Triggers>
</Style>
Error:
错误：
Error 1 A value of type 'Style' cannot be added to a collection or dictionary of type 'UIElementCollection'. D:\VS\VIM\VIM_WPF\login.xaml 15 9 VIM_Wpf
错误 1 无法将“样式”类型的值添加到“UIElementCollection”类型的集合或字典中。D:\VS\VIM\VIM_WPF\login.xaml 15 9 VIM_Wpf
Any other solution how to fix this?
任何其他解决方案如何解决这个问题？
回答by Bogey
Either you define your style as a resource (e.g. in your usercontrol / window's resources), and then do something like
要么将样式定义为资源（例如在用户控件/窗口的资源中），然后执行类似的操作
<TextBox Style="{StaticResource theKeyOfYourStyle}" ..../>
or you explicitly set it in the TextBox:
或者您在 TextBox 中明确设置它：
<TextBox x:Name="usernameTextBox" HorizontalAlignment="Left" Height="23" Margin="115,31,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="277" GotFocus="usernameTextBox_GotFocus">
<TextBox.Style>
<Style TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="IsFocused" Value="true">
<Setter Property="Background" Value="{StaticResource OnMouseOverColor}" />
</Trigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
