C# 获取并设置代码隐藏中的绑定转换器

在我的XAML中，

TextBlock

的

Text

属性有一个绑定集，如下所示：

<TextBlock x:Name="MyTextBlock" TextWrapping="Wrap" Text="{Binding TextProperty, Converter={StaticResource MyConverter}}"/>

---

您需要获取绑定本身：

//For WPF:
// var binding = BindingOperations.GetBindingBase(
//     MyTextBlock,
//     TextBlock.TextProperty);

//For SilverLight we have to use the expression:
var expr = MyTextBlock.GetBindingExpression(TextBlock.TextProperty);
if (expr != null)
{
    // for Silverlight we have to use the ParentBinding of the expression
    var binding = expr.ParentBinding;
    binding.Converter = yourLogicHere;

    // in WPF there are 3 types of bindings
    /*
    else if (binding is MultiBinding)
    {
        ((MultiBinding)binding).Converter = yourMultiLogicHere;
    }
    else if (binding is PriorityBinding)
    {
        foreach (var childBinding in ((PriorityBinding)binding).Bindings)
        {
            ((Binding)childBinding).Converter = yourLogicHere;
        }
    }
    */
}

---

BindingOperations

没有

GetBindingBase

方法，它只显示

SetBinding

。它说，

“System.Windows.Data.BindingOperations”不包含“GetBindingBase”的定义。

噢，Silverlight…我会更新的。Silverlight是二等公民，没有WPF那么受支持。我会避免的。

//For WPF:
// var binding = BindingOperations.GetBindingBase(
//     MyTextBlock,
//     TextBlock.TextProperty);

//For SilverLight we have to use the expression:
var expr = MyTextBlock.GetBindingExpression(TextBlock.TextProperty);
if (expr != null)
{
    // for Silverlight we have to use the ParentBinding of the expression
    var binding = expr.ParentBinding;
    binding.Converter = yourLogicHere;

    // in WPF there are 3 types of bindings
    /*
    else if (binding is MultiBinding)
    {
        ((MultiBinding)binding).Converter = yourMultiLogicHere;
    }
    else if (binding is PriorityBinding)
    {
        foreach (var childBinding in ((PriorityBinding)binding).Bindings)
        {
            ((Binding)childBinding).Converter = yourLogicHere;
        }
    }
    */
}