Fixed REFRESH for .intellisense.xml file and Workbook.CustomXMLParts.

Author: Sergey-Vlasov

Source/ExcelDna.IntelliSense/Providers/WorkbookIntelliSenseProvider.cs

@@ -353,21 +353,7 @@ void RegisterWithXmlProvider(Workbook wb)
             var path = wb.FullName;
             var xmlPath = GetXmlPath(path);
             _xmlProvider.RegisterXmlFunctionInfo(xmlPath);  // Will check if file exists
-
-            Logger.Provider.Verbose($"WorkbookIntelliSenseProvider.RegisterWithXmlProvider - Checking CustomXMLParts");
-
-            var customXmlParts = wb.CustomXMLParts.SelectByNamespace(XmlIntelliSense.Namespace);
-            if (customXmlParts.Count > 0)
-            {
-                Logger.Provider.Verbose($"WorkbookIntelliSenseProvider.RegisterWithXmlProvider - CustomXMLPart found");
-                // We just take the first one - register against the Bworkbook name
-                _xmlProvider.RegisterXmlFunctionInfo(path, customXmlParts[1].XML);
-            }
-            else
-            {
-                Logger.Provider.Verbose($"WorkbookIntelliSenseProvider.RegisterWithXmlProvider - No CustomXMLPart found");
-            }
-
+            _xmlProvider.RegisterXmlFunctionInfo(path, () => GetIntelliSenseFromCustomXMLParts(wb));
         }
 
         void UnregisterWithXmlProvider(Workbook wb)
@@ -404,6 +390,27 @@ public void Dispose()
             }
         }
 
+        string GetIntelliSenseFromCustomXMLParts(Workbook wb)
+        {
+            string result = null;
+
+            Logger.Provider.Verbose($"WorkbookIntelliSenseProvider.RegisterWithXmlProvider - Checking CustomXMLParts");
+
+            var customXmlParts = wb.CustomXMLParts.SelectByNamespace(XmlIntelliSense.Namespace);
+            if (customXmlParts.Count > 0)
+            {
+                Logger.Provider.Verbose($"WorkbookIntelliSenseProvider.RegisterWithXmlProvider - CustomXMLPart found");
+                // We just take the first one - register against the workbook name
+                result = customXmlParts[1].XML;
+            }
+            else
+            {
+                Logger.Provider.Verbose($"WorkbookIntelliSenseProvider.RegisterWithXmlProvider - No CustomXMLPart found");
+            }
+
+            return result;
+        }
+
         string GetXmlPath(string wbPath) => Path.ChangeExtension(wbPath, ".intellisense.xml");
     }
 }

Source/ExcelDna.IntelliSense/Providers/XmlIntelliSenseProvider.cs

@@ -17,28 +17,25 @@ class XmlIntelliSenseProvider : IIntelliSenseProvider
     {
         public class XmlRegistrationInfo
         {
-            string _fileName;              // Might be .xml file or Workbook path. Use only if _xmlIntelliSense is null.
-            string _xmlIntelliSense;       // Might be null
+            string _fileName;              // Might be .xml file or Workbook path. Use only if _xmlIntelliSenseSource is null.
+            Func<string> _xmlIntelliSenseSource; // Might be null
             XmlIntelliSense _intelliSense; // Might be null - lazy parsed
             string _path;                  // Directory of file, used to expand HelpTopic
 
-            public XmlRegistrationInfo(string fileName, string xmlIntelliSense)
+            public XmlRegistrationInfo(string fileName, Func<string> xmlIntelliSenseSource)
             {
                 _fileName = fileName;
-                _xmlIntelliSense = xmlIntelliSense;
+                _xmlIntelliSenseSource = xmlIntelliSenseSource;
                 _path = Path.GetDirectoryName(fileName);
             }
 
             // Called in a macro context
             public void Refresh()
             {
-                if (_intelliSense != null)
-                    return; // Already done
-                
                 try
                 {
                     // Parse first
-                    var xml = _xmlIntelliSense;
+                    var xml = _xmlIntelliSenseSource?.Invoke();
                     if (xml == null)
                     {
                         xml = File.ReadAllText(_fileName);
@@ -87,15 +84,15 @@ public XmlIntelliSenseProvider()
         // May be called on the main Excel thread or on another thread (e.g. our automation thread)
         // Pass in the xmlFunctionInfo if available (from inside document), else file will be read
         // We make the parsing lazy...
-        public void RegisterXmlFunctionInfo(string fileName, string xmlIntelliSense = null)
+        public void RegisterXmlFunctionInfo(string fileName, Func<string> xmlIntelliSenseSource = null)
         {
-            if (!File.Exists(fileName) && xmlIntelliSense == null)
+            if (!File.Exists(fileName) && xmlIntelliSenseSource == null)
             {
                 Logger.Provider.Verbose($"XmlIntelliSenseProvider.RegisterXmlFunctionInfo - Not IntelliSense file at {fileName}");
                 return;
             }
-            
-            var regInfo = new XmlRegistrationInfo(fileName, xmlIntelliSense);
+
+            var regInfo = new XmlRegistrationInfo(fileName, xmlIntelliSenseSource);
             Logger.Provider.Verbose($"XmlIntelliSenseProvider.RegisterXmlFunctionInfo - Created XmlRegistrationInfo info for {fileName}");
             lock (_xmlRegistrationInfos)
             {
@@ -157,7 +154,7 @@ public IList<FunctionInfo> GetFunctionInfos()
             Logger.Provider.Verbose("XmlIntelliSenseProvider.GetFunctionInfos - End");
             return functionInfos;
         }
-        
+
         void OnInvalidate(object _unused_)
         {
             Logger.Provider.Verbose($"XmlIntelliSenseProvider.OnInvalidate - Invoking Invalidate event");