fallback on invariant format when parsing fields

by invariant meaning english-based number style, with period char as decimal separator

2 files changed, 12 insertions, 1 deletions

diff --git a/grapher/Constants/Constants.cs b/grapher/Constants/Constants.cs
index d669d25..5bee626 100644
--- a/grapher/Constants/Constants.cs
+++ b/grapher/Constants/Constants.cs
@@ -1,4 +1,5 @@
 using System.Drawing;
+using System.Globalization;
 
 namespace grapher
 {
@@ -110,6 +111,9 @@ namespace grapher
         /// <summary> Default name of settings file. </summary>
         public const string DefaultSettingsFileName = @"settings.json";
 
+        /// <summary> Style used by System.Double.Parse </summary>
+        public const NumberStyles FloatStyle = NumberStyles.Float | NumberStyles.AllowThousands;
+
         #endregion Constants
 
         #region ReadOnly
diff --git a/grapher/Models/Fields/Field.cs b/grapher/Models/Fields/Field.cs
index 345f814..6f15525 100644
--- a/grapher/Models/Fields/Field.cs
+++ b/grapher/Models/Fields/Field.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Drawing;
+using System.Globalization;
 using System.Windows.Forms;
 
 namespace grapher
@@ -274,9 +275,15 @@ namespace grapher
             }
         }
 
+        public static bool TryParse(string s, out double res)
+        {
+            return double.TryParse(s, Constants.FloatStyle, NumberFormatInfo.CurrentInfo, out res) ||
+                double.TryParse(s, Constants.FloatStyle, NumberFormatInfo.InvariantInfo, out res);
+        }
+
         private void TextToData()
         {
-            if (double.TryParse(Box.Text, out double value) && 
+            if (TryParse(Box.Text, out double value) && 
                 value <= MaxData && value >= MinData)
             {
                 _data = value;