就像标题所说的那样,Iam试图在WPF中显示/隐藏文本框,而不在MainWindow.xaml.cs文件中编写代码。
模型:
public class Person
{
public string Comment { get; set; }
}
视图:
<Window x:Class="PiedPiper.View.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="Window"
Title="WPF" Height="400" Width="400">
<CheckBox Content="Show comment" Name="CommentCheckBox"/>
<TextBox Text="{Binding Comment, UpdateSourceTrigger=PropertyChanged}" Visibility="Hidden" Name="CommentTextBox"></TextBox>
</Grid>
ViewModel:
public class PersonViewModel : INotifyPropertyChanged
{
public PersonViewModel(Person person)
{
Comment = person.Comment;
}
private string _comment;
public string Comment
{
get { return _comment; }
set { _comment = value; OnPropertyChanged("Comment"); }
}
private void OnPropertyChanged(string propertyName)
{
var handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
public event PropertyChangedEventHandler PropertyChanged;
}
因此,文本框应在开始时隐藏,但在选中复选框时可见。请帮忙!
谢谢。
您可以绑定TextBox.Visiblity
到CheckBox.IsChecked
。如果要在之间切换Hidden
,Visible
则需要编写自定义IValueConverter
或创建简单Style.Trigger
<StackPanel>
<CheckBox Content="Show comment" Name="CommentCheckBox"/>
<TextBox Text="{Binding Comment, UpdateSourceTrigger=PropertyChanged}" Name="CommentTextBox">
<TextBox.Style>
<Style TargetType="{x:Type TextBox}">
<Setter Property="Visibility" Value="Hidden"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=CommentCheckBox, Path=IsChecked}" Value="True">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
</StackPanel>
如果您想在两者之间进行切换,Collapsed
并且Visible
有一种更简单的方法,则可以使用内置BooleanToVisibilityConverter
<StackPanel>
<StackPanel.Resources>
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
</StackPanel.Resources>
<CheckBox Content="Show comment" Name="CommentCheckBox"/>
<TextBox
Text="{Binding Comment, UpdateSourceTrigger=PropertyChanged}"
Visibility="{Binding ElementName=CommentCheckBox, Path=IsChecked, Converter={StaticResource BooleanToVisibilityConverter}}"
Name="CommentTextBox"/>
</StackPanel>
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我来说两句