在 TextBox 绑定到属性后忽略格式字符串

Question

在动态构建UserControl中，我format string以TextBox这种方式设置了：

TextBox newTextBox = new TextBox();

TempViewModel viewModel = new TempViewModel();

var binding = new System.Windows.Data.Binding

{

    Source = viewModel,

    Path = new PropertyPath("DecimalValue"),

    ConverterCulture = new System.Globalization.CultureInfo("de-DE"),

    StringFormat = "{0:#,##0.00}"

};

newTextBox.SetBinding(TextBox.TextProperty, binding);

public class TempViewModel

{

    public decimal DecimalValue { get; set; }

}

到目前为止效果很好。

但在添加DependencyProperty后，格式将被忽略。Dependencyproperty是这样定义的：

public class UserControl_CBOGridQuotePositions : UserControl

{

    private static readonly DependencyProperty Amount_QuotePos_Base_DependencyProperty =

        DependencyProperty.Register("Amount_QuotePos_Base", typeof(System.Decimal), typeof(UserControl_CBOGridQuotePositions), new PropertyMetadata(0m));

    public System.Decimal Amount_QuotePos_Base

    {

        get { return (System.Decimal)GetValue(UserControl_CBOGridQuotePositions.Amount_QuotePos_Base_DependencyProperty); }

        set { SetValue(UserControl_CBOGridQuotePositions.Amount_QuotePos_Base_DependencyProperty, value); }

    }

    private void MakeTheBindings(DependencyProperty dependencyProperty)

    {

        var binding = new Binding("Amount_QuotePos_Base");

        binding.Source = this; // which is the UserControl_CBOGridQuotePositions

        newTextBox.SetBinding(dependencyProperty, binding);

    }

}

有没有办法在 TextBox 绑定到属性时使格式工作？

Answer 1

因为在 MakeTheBindings() 中，您要用新的 Binding 替换 Binding 。确保在执行此操作时 var binding = new Binding("Amount_QuotePos_Base"); 您还设置了所有属性，例如 ConverterCulture 和 StringFormat