使用IValueConverter C#将字符串转换为双精度转换器

using System;
using System.Globalization;
using System.Windows.Data;

public class StringToDoubleConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        string stringValue = value as string;
        if (stringValue != null)
        {
            double result;
            if (double.TryParse(stringValue, out result))
            {
                return result;
            }
        }
        return Binding.DoNothing;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

<Window x:Class="MyApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:converters="clr-namespace:MyApp.Converters"
        Title="My App" Height="450" Width="800">
    <Window.Resources>
        <converters:StringToDoubleConverter x:Key="StringToDoubleConverter" />
    </Window.Resources>
    <Grid>
        <TextBox x:Name="txtInput" Text="{Binding InputText}" />
        <TextBlock Text="{Binding InputText, Converter={StaticResource StringToDoubleConverter}}" />
    </Grid>
</Window>