添加项目文件。

VisionFrame.Base/Converter/SizeConverter.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Data;
+
+namespace VisionFrame.Base.Converter
+{
+    public class SizeConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            double r = 2;
+            if (parameter != null)
+            {
+                double.TryParse(parameter.ToString(), out r);
+            }
+            // 实际的宽高值    
+            // 将这个值乘2返回出去
+            if (value != null && double.TryParse(value.ToString(), out double new_value))
+                return new_value * r;
+
+            return value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return null;
+        }
+    }
+}