首次提交：添加src文件夹代码

Cowain.Bake.Common/Converter/ScaleConverter.cs

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+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Data;
+
+namespace Cowain.Bake.Common.Converter
+{
+    public class ScaleConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+
+            if (parameter == null)
+                throw new ArgumentNullException("value can not be null");
+            if (value == null)
+                throw new ArgumentNullException("value can not be null");
+            double c = System.Convert.ToDouble(parameter);
+            double index = System.Convert.ToDouble(value);
+            return index / c;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (parameter == null)
+                throw new ArgumentNullException("value can not be null");
+            if (value == null)
+                throw new ArgumentNullException("value can not be null");
+            double c = System.Convert.ToDouble(parameter);
+            double index = System.Convert.ToDouble(value);
+            return System.Convert.ToInt32(index * c);
+        }
+    }
+}