TextBox 绑定到属性后忽略格式字符串

Question

在动态构建的 UserControl 中，我以这种方式为 TextBox 设置了 format string：

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; }
}

到目前为止一切正常。

但是在添加 DependencyProperty 之后格式被忽略。 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);
    }
}

有没有办法在文本框绑定到属性时使格式正常工作？

Answer 1

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

TextBox 绑定到属性后忽略格式字符串

Format string is ignored after TextBox gets bound to a property

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TextBox 绑定到 属性 后忽略格式字符串

Format string is ignored after TextBox gets bound to a property

c#

wpf

dependency-properties

TextBox 绑定到属性后忽略格式字符串