Converters/DoubleStringConverter.cs

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+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace MembranePoreTester.Converters
+{
+    // 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
+    public class DoubleStringConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value == null) return string.Empty;
+            if (value is double d)
+            {
+                return d.ToString("G", culture);
+            }
+            return value.ToString();
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var s = (value as string) ?? string.Empty;
+            s = s.Trim();
+            if (string.IsNullOrEmpty(s))
+            {
+                // 不强制将空字符串写回为0，避免用户输入时被覆盖
+                return Binding.DoNothing;
+            }
+
+            if (double.TryParse(s, NumberStyles.Any, culture, out double result))
+            {
+                return result;
+            }
+
+            // 如果解析失败，不更新源
+            return Binding.DoNothing;
+        }
+    }
+}