From 0a90a0cfece3b6f7dda6c20fda0e2d1ba11f3419 Mon Sep 17 00:00:00 2001
From: Brett Hewitson <bletch1971@hotmail.com>
Date: Sun, 6 Jun 2021 16:14:19 +1000
Subject: [PATCH] Update IntRangeValueConverter.cs

---
 .../Converters/IntRangeValueConverter.cs                   | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/ServerManager.Common/Converters/IntRangeValueConverter.cs b/src/ServerManager.Common/Converters/IntRangeValueConverter.cs
index da654b5c..dc5fe025 100644
--- a/src/ServerManager.Common/Converters/IntRangeValueConverter.cs
+++ b/src/ServerManager.Common/Converters/IntRangeValueConverter.cs
@@ -40,7 +40,12 @@ namespace ServerManagerTool.Common.Converters
 
         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            var sliderValue = System.Convert.ToInt32(value);
+            if (value is null || value.ToString() == string.Empty)
+                return default;
+
+            if (!int.TryParse(value.ToString(), out int sliderValue))
+                return default;
+
             sliderValue = Math.Max(MinValue, sliderValue);
             sliderValue = Math.Min(MaxValue, sliderValue);