40 lines
1.2 KiB
C#
40 lines
1.2 KiB
C#
using System;
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using System.Globalization;
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using System.Windows.Data;
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namespace MembranePoreTester.Converters
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{
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// 将 double 与 string 之间进行安全转换，避免在输入未完成时把值重置为 0
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public class DoubleStringConverter : IValueConverter
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{
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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{
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if (value == null) return string.Empty;
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if (value is double d)
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{
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return d.ToString("G", culture);
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}
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return value.ToString();
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}
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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{
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var s = (value as string) ?? string.Empty;
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s = s.Trim();
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if (string.IsNullOrEmpty(s))
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{
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// 不强制将空字符串写回为0，避免用户输入时被覆盖
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return Binding.DoNothing;
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}
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if (double.TryParse(s, NumberStyles.Any, culture, out double result))
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{
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return result;
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}
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// 如果解析失败，不更新源
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return Binding.DoNothing;
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}
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}
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}
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