Question

我有很多文本框分布在三个单独的TabItems上，我想让用户选择喜欢的texbox并将它们显示在一个名为Favorites的tabItem上以方便使用。

视觉部分工作正常，但我似乎无法使绑定工作，因此新的文本框保持空白。

XAML：

<StackPanel Grid.Row="3" Grid.Column="0" x:Name="SP_TB_DP_ArticleName"     x:Uid="ArticleName" Style="{StaticResource FavButton}"  MouseDown="FavButton_Click" >
   <Label  Content="ArticleName"  Style="{StaticResource Heading2}" />
    <Border Background="Transparent">
      <StackPanel Orientation="Horizontal">
        <Path Uid="FavAdd" Style="{StaticResource Ico-AddFav}" Fill="Black"/>
        <Path Uid="FavRem" Style="{StaticResource Ico-RemFav}" Fill="Black" Visibility="Collapsed" />
      </StackPanel>
     </Border>
    </StackPanel>
<TextBox  x:Name="TB_DP_ArticleName"  Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="2" Style="{StaticResource Heading3}" Text="{Binding Article.Name, UpdateSourceTrigger=PropertyChanged}" />

绑定的C＃

private void FavButton_Click(object sender, MouseButtonEventArgs e)
{
[... creating textbox and label]

//BindingName is the name of the original textbox ie: TB_DP_ArticleName
DependencyObject OriginalTB = (DependencyObject) this.FindName(BindingName);
BindingBase BB = BindingOperations.GetBindingBase(OriginalTB, TextBox.TextProperty);
var oldBind = BB as Binding;

//Clone Method from other question Link see below *
//BindingBase copyBind= CloneBinding(BB, OriginalTB);


 if (OriginalTB != null)
 {
  Binding binding = new Binding();
  binding.Source = this;
  binding.Path = oldBind.Path;
  binding.Mode = BindingMode.OneWay;
  binding.IsAsync = false;
  binding.UpdateSourceTrigger = UpdateSourceTrigger.Default;
  binding.TargetNullValue = "null";
  BindingOperations.SetBinding(tb, TextBox.TextProperty, binding);
  //BindingOperations.SetBinding(tb, TextBox.TextProperty, copyBind);
 }

//Code to add the Textbox to the Grid 
[...]

*）我尝试了来自Binding does not have a Clone method, whats an effective way to copy it的cloneMethod 但那并没有起作用。

在调试期间，oldBind.Path显示了Article.Name的正确路径。

但最终以编程方式创建的文本框不会显示原始文本框的内容。它只是保持空白。

Answer 1

最后我明白了！

我必须将绑定源设置为原始TextBox并将Binding设置为Text。这并不是100％的问题，因为这可能不是关于@AlvinfromDiaspar评论的最有效的解决方案 Keep two textboxes synchronized in WPF 但无论如何，它适用于我的目的。

我改变了什么：

Binding binding = new Binding("Text"); binding.Source = (DependencyObject)this.FindName(BindingName);

绑定的整个片段：

String BindingName = inName.Substring(3);

BindingBase BB = BindingOperations.GetBindingBase(
                 (DependencyObject)this.FindName(BindingName),
                 TextBox.TextProperty);

var oldBind = BB as Binding;

if (BB != null)
{
  //the magic goes here
  Binding binding = new Binding("Text");
  binding.Source = (DependencyObject)this.FindName(BindingName);

  binding.Mode = BindingMode.OneWay;
  binding.IsAsync = false;
  binding.UpdateSourceTrigger = UpdateSourceTrigger.Default;
  binding.TargetNullValue = "null";
  BindingOperations.SetBinding(tb, TextBox.TextProperty, binding);
 }

Answer 2

不是尝试复制绑定，只需复制控件（使用其数据绑定，但不复制其名称），然后（绑定到其可见性属性），然后根据用户选择显示或隐藏文本框控件。

<TextBox  Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="2"
          Style="{StaticResource Heading2}" 
          Text="{Binding Article.Name, UpdateSourceTrigger=PropertyChanged}"  
          Visibility = "{Binding AmIVisible_1}" />


<TextBox  Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="2" 
          Style="{StaticResource Heading3}" 
          Text="{Binding Article.Name, UpdateSourceTrigger=PropertyChanged}"  
          Visiblity="{Binding AmIVisible_2}" />

复制包含其绑定的texbox

2 个答案: