我正在尝试将“浏览”按钮附加到许多包含文件名的文本框中。
我的目标是这样：
<TextBox Text="c:\Filename.txt" Template="{StaticResource FileBrowser}"/>
我声明的控件模板如下：
<Window.Resources>
<ControlTemplate x:Key="FileBrowser" TargetType="{x:Type TextBox}">
<Grid Grid.Row="{TemplateBinding Grid.Row}" Grid.Column="{TemplateBinding Grid.Column}">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<ContentPresenter Grid.Column="0" Grid.Row="0"/>
<Button Grid.Column="1" Content="..."/>
</Grid>
</ControlTemplate>
</Window.Resources>
但是当我尝试使用它时，那里不再有TextBox了。只有一个空格，后跟“......”
有谁知道我做错了什么？这是否只能通过制作新的UserControl来解决？
答案 0 :(得分：3)
TextBox定义了一个名为ScrollViewer类型的“PART_ContentHost”的TemplatePart。代码中的所有文本处理都依赖于模板中存在的此元素。由于您尚未将其包含在模板中，因此TextBox基本上已损坏。改为将您的ContentPresenter更改为：
<ScrollViewer x:Name="PART_ContentHost" Grid.Column="0" Grid.Row="0"/>
答案 1 :(得分：0)
ContentPresenter将只提供内容（文本字符串），它不会提供文本框布局。
对于此方案，请创建Usercontrol或ContentControl。
答案 2 :(得分：0)
TextBox不是ContentControl，因此无法理解ContentPresenter。
然而，您可以使用TemplateBinding将ContentPresenter指向正确的方向：
<ContentPresenter Grid.Column="0" Grid.Row="0" Content="{TemplateBinding Text}" />
现在它将文本表示为新内容。
此外，您可能想要重新考虑使用ContentPresenter，只需使用TextBlock而不是ContentPresenter。
<TextBlock Grid.Column="0" Grid.Row="0" Text="{TemplateBinding Text}" />
答案 3 :(得分：0)
试试这个xaml ......
<Window.Resources>
<LinearGradientBrush x:Key="NormalBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#EEE" Offset="0.0"/>
<GradientStop Color="#CCC" Offset="1.0"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="NormalBorderBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#CCC" Offset="0.0"/>
<GradientStop Color="#444" Offset="1.0"/>
</LinearGradientBrush>
<!-- LightBrush is used for content areas such as Menu, Tab Control background -->
<LinearGradientBrush x:Key="LightBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF" Offset="0.0"/>
<GradientStop Color="#EEE" Offset="1.0"/>
</LinearGradientBrush>
<!-- MouseOverBrush is used for MouseOver in Button, Radio Button, CheckBox -->
<LinearGradientBrush x:Key="MouseOverBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF" Offset="0.0"/>
<GradientStop Color="#AAA" Offset="1.0"/>
</LinearGradientBrush>
<!-- PressedBrush is used for Pressed in Button, Radio Button, CheckBox -->
<LinearGradientBrush x:Key="PressedBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#BBB" Offset="0.0"/>
<GradientStop Color="#EEE" Offset="0.1"/>
<GradientStop Color="#EEE" Offset="0.9"/>
<GradientStop Color="#FFF" Offset="1.0"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="PressedBorderBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#444" Offset="0.0"/>
<GradientStop Color="#888" Offset="1.0"/>
</LinearGradientBrush>
<!-- SelectedBackgroundBrush is used for the Selected item in ListBoxItem, ComboBoxItem-->
<SolidColorBrush x:Key="SelectedBackgroundBrush" Color="#DDD"/>
<!-- Disabled Brushes are used for the Disabled look of each control -->
<SolidColorBrush x:Key="DisabledForegroundBrush" Color="#888"/>
<SolidColorBrush x:Key="DisabledBackgroundBrush" Color="#EEE"/>
<SolidColorBrush x:Key="DisabledBorderBrush" Color="#AAA"/>
<!-- Used for background of ScrollViewer, TreeView, ListBox, Expander, TextBox, Tab Control -->
<SolidColorBrush x:Key="WindowBackgroundBrush" Color="#FFF"/>
<!-- DefaultedBorderBrush is used to show KeyBoardFocus -->
<LinearGradientBrush x:Key="DefaultedBorderBrush" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#777" Offset="0.0"/>
<GradientStop Color="#000" Offset="1.0"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="SolidBorderBrush" Color="#888"/>
<SolidColorBrush x:Key="LightBorderBrush" Color="#AAA"/>
<SolidColorBrush x:Key="LightColorBrush" Color="#DDD"/>
<!-- Used for Checkmark, Radio button, TreeViewItem, Expander ToggleButton glyphs -->
<SolidColorBrush x:Key="GlyphBrush" Color="#444"/>
<!-- Simple TextBox -->
<Style x:Key="SimpleTextBox" TargetType="{x:Type TextBox}">
<Setter Property="KeyboardNavigation.TabNavigation" Value="None"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="AllowDrop" Value="true"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TextBox}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Border x:Name="Border" Background="{DynamicResource WindowBackgroundBrush}" BorderBrush="{DynamicResource SolidBorderBrush}" BorderThickness="1" Padding="2" CornerRadius="2">
<!-- The implementation places the Content into the ScrollViewer. It must be named PART_ContentHost for the control to function -->
<ScrollViewer Margin="0" x:Name="PART_ContentHost" Style="{DynamicResource SimpleScrollViewer}" Background="{TemplateBinding Background}"/>
</Border>
<Button HorizontalAlignment="Stretch" Width="25" Content="..." Grid.Column="1" Margin="1"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Background" Value="{DynamicResource DisabledBackgroundBrush}" TargetName="Border"/>
<Setter Property="BorderBrush" Value="{DynamicResource DisabledBackgroundBrush}" TargetName="Border"/>
<Setter Property="Foreground" Value="{DynamicResource DisabledForegroundBrush}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid>
<TextBox Style="{StaticResource SimpleTextBox}" Height="25"></TextBox>
</Grid>