在c#中将RichTextBox绑定到滑块控件

Question

我有下面的XAML代码，我想在XAML .cs中执行。

<RichTextBox.LayoutTransform>
    <ScaleTransform ScaleX="{Binding ElementName=mySlider, Path=Value}"
                    ScaleY="{Binding ElementName=mySlider, Path=Value}"/>
</RichTextBox.LayoutTransform>

基本上它将滑动条绑定到richtextbox并执行缩放。

下面是我尝试过的:

RichTextBox newtext = new RichTextBox();
ScaleTransform mytran = new ScaleTransform();
mytran.ScaleX = mySlider.Value;
mytran.ScaleY = mySlider.Value;
newtext.LayoutTransform = mytran;

Answer 1

后面的代码相当于Xaml

//<RichTextBox.LayoutTransform>
//    <ScaleTransform ScaleX="{Binding ElementName=mySlider, Path=Value}"
//                    ScaleY="{Binding ElementName=mySlider, Path=Value}"/>
//</RichTextBox.LayoutTransform>
ScaleTransform scaleTransform = new ScaleTransform();
Binding scaleXBinding = new Binding("Value");
scaleXBinding.Source = mySlider;
Binding scaleYBinding = new Binding("Value");
scaleYBinding.Source = mySlider;
BindingOperations.SetBinding(scaleTransform,
                             ScaleTransform.ScaleXProperty,
                             scaleXBinding);
BindingOperations.SetBinding(scaleTransform,
                             ScaleTransform.ScaleYProperty,
                             scaleYBinding);
RichTextBox newText = new RichTextBox();
newText.LayoutTransform = scaleTransform;

Answer 2

您确实设置了转换，但没有设置绑定-它将被修复。你需要使用像

这样的东西

Binding scaleBinding = new Binding("Value"){ElementName="mySlider"};
BindingOperations.SetBinding(mytran, ScaleTransform.ScaleXProperty, scaleBinding);
BindingOperations.SetBinding(mytran, ScaleTransform.ScaleYProperty, scaleBinding);

Answer 3

不确定您是否在询问如何在代码中执行绑定，或者如何在代码中设置ScaleX和ScaleY属性(例如，不绑定)。如果是这种情况，可以这样做:

首先，给你的ScaleTransform一个名字，例如:myScaleTransform":

<RichTextBox.LayoutTransform>
   <ScaleTransform x:Name="myScaleTransform" ScaleX="1" ScaleY="1" />
</RichTextBox.LayoutTransform>

然后，为mySlider的ValueChanged事件添加事件处理程序。在这个处理程序中，更新myScaleTransform的ScaleX和ScaleY属性:

public void mySlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
    myScaleTransform.ScaleX = mySlider.Value;
    myScaleTransform.ScaleY = mySlider.Value;
}