diff --git a/src/UI/WPF/Converters/EditableNumberConverter.cs b/src/UI/WPF/Converters/EditableNumberConverter.cs
index ee7886a..4141730 100644
--- a/src/UI/WPF/Converters/EditableNumberConverter.cs
+++ b/src/UI/WPF/Converters/EditableNumberConverter.cs
@@ -36,7 +36,7 @@ namespace NavisworksTransport.UI.WPF.Converters
             string text = value as string;
             if (IsIntermediateText(text))
             {
-                throw new FormatException("请输入有效的数字。");
+                return Binding.DoNothing;
             }
 
             text = text.Trim();
@@ -47,7 +47,7 @@ namespace NavisworksTransport.UI.WPF.Converters
                 return parsedValue;
             }
 
-            throw new FormatException("请输入有效的数字。");
+            return Binding.DoNothing;
         }
 
         public static bool IsIntermediateText(string text)