Merge pull request #6 from SyncfusionExamples/EJ2-70010-Metafile-image

Resolve Image not loading issue while Metafile image parsed.

Author: gunasekarant

src/ej2-documenteditor-server/Controllers/DocumentEditorController.cs

@@ -13,7 +13,6 @@
 using WDocument = Syncfusion.DocIO.DLS.WordDocument;
 using WFormatType = Syncfusion.DocIO.FormatType;
 using Syncfusion.EJ2.SpellChecker;
-using EJ2DocumentEditorServer;
 
 namespace EJ2DocumentEditorServer.Controllers
 {
@@ -44,12 +43,47 @@ public string Import(IFormCollection data)
             file.CopyTo(stream);
             stream.Position = 0;
 
+            //Hooks MetafileImageParsed event.
+            WordDocument.MetafileImageParsed += OnMetafileImageParsed;
             WordDocument document = WordDocument.Load(stream, GetFormatType(type.ToLower()));
+            //Unhooks MetafileImageParsed event.
+            WordDocument.MetafileImageParsed -= OnMetafileImageParsed;
+
             string json = Newtonsoft.Json.JsonConvert.SerializeObject(document);
             document.Dispose();
             return json;
         }
 
+        //Converts Metafile to raster image.
+        private static void OnMetafileImageParsed(object sender, MetafileImageParsedEventArgs args)
+        {
+            //You can write your own method definition for converting metafile to raster image using any third-party image converter.
+            args.ImageStream = ConvertMetafileToRasterImage(args.MetafileStream);
+        }
+
+        private static Stream ConvertMetafileToRasterImage(Stream ImageStream)
+        {
+            //Here we are loading a default raster image as fallback.
+            Stream imgStream = GetManifestResourceStream("ImageNotFound.jpg");
+            return imgStream;
+            //To do : Write your own logic for converting metafile to raster image using any third-party image converter(Syncfusion doesn't provide any image converter).
+        }
+
+        private static Stream GetManifestResourceStream(string fileName)
+        {
+            System.Reflection.Assembly execAssembly = typeof(WDocument).Assembly;
+            string[] resourceNames = execAssembly.GetManifestResourceNames();
+            foreach (string resourceName in resourceNames)
+            {
+                if (resourceName.EndsWith("." + fileName))
+                {
+                    fileName = resourceName;
+                    break;
+                }
+            }
+            return execAssembly.GetManifestResourceStream(fileName);
+        }
+
         [AcceptVerbs("Post")]
         [HttpPost]
         [EnableCors("AllowAllOrigins")]
@@ -118,7 +152,11 @@ public string SystemClipboard([FromBody]CustomParameter param)
             {
                 try
                 {
+                    //Hooks MetafileImageParsed event.
+                    WordDocument.MetafileImageParsed += OnMetafileImageParsed;
                     WordDocument document = WordDocument.LoadString(param.content, GetFormatType(param.type.ToLower()));
+                    //Unhooks MetafileImageParsed event.
+                    WordDocument.MetafileImageParsed -= OnMetafileImageParsed;
                     string json = Newtonsoft.Json.JsonConvert.SerializeObject(document);
                     document.Dispose();
                     return json;