Merge branch 'compdfkit_demo_windows' of http://git.kdan.cc:8865/Others/kmpdfkit_demo into compdfkit_demo_windows

compdfkit_demo_windows/compdfkit/compdfkit-tools/PDFView/PDFThumbnail/PDFThumbnailControl/CPdfThumbnailControl.xaml.cs

@@ -2,6 +2,7 @@
 using ComPDFKitViewer.PdfViewer;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -131,29 +132,33 @@ namespace compdfkit_tools.PDFControl
             thumbnailItemList.Clear();
             for (int i = 0; i < pdfView.Document.PageCount; i++)
             {
-
                 Size pageSize = pdfView.Document.GetPageSize(i);
 
-                int imageWidth = pageSize.Width > pageSize.Height ? thumbnailWidth * 2 : (int)(pageSize.Width / pageSize.Height * thumbnailWidth * 2);
-                int imageHeight = pageSize.Height > pageSize.Width ? thumbnailWidth * 2 : (int)(pageSize.Height / pageSize.Width * thumbnailWidth * 2);
+                int imageWidth = 0; 
+                int imageHeight = 0; 
 
-                Image img = new Image()
+                if(pageSize.Width>0 && pageSize.Height>0)
                 {
-                    Margin = new Thickness(0, 0, 5, 0),
-
-                    Width = imageWidth,
-                    Height = imageHeight,
-                    Stretch = Stretch.Uniform,
-                };
-
-                ThumbnailItem addItem = new ThumbnailItem();
-                addItem.ImageHeight = imageHeight;
-                addItem.ImageWidth = imageWidth;
-                addItem.ThumbnailHeight = thumbnailWidth;
-                addItem.ThumbnailWidth = thumbnailWidth;
-                addItem.PageIndex = i;
-                addItem.ImageData = img;
-                thumbnailItemList.Add(addItem);
+                    imageWidth = pageSize.Width > pageSize.Height ? thumbnailWidth * 2 : (int)(pageSize.Width / pageSize.Height * thumbnailWidth * 2);
+                    imageHeight = pageSize.Height > pageSize.Width ? thumbnailWidth * 2 : (int)(pageSize.Height / pageSize.Width * thumbnailWidth * 2);
+                    Image img = new Image()
+                    {
+                        Margin = new Thickness(0, 0, 5, 0),
+
+                        Width = imageWidth,
+                        Height = imageHeight,
+                        Stretch = Stretch.Uniform,
+                    };
+
+                    ThumbnailItem addItem = new ThumbnailItem();
+                    addItem.ImageHeight = imageHeight;
+                    addItem.ImageWidth = imageWidth;
+                    addItem.ThumbnailHeight = thumbnailWidth;
+                    addItem.ThumbnailWidth = thumbnailWidth;
+                    addItem.PageIndex = i;
+                    addItem.ImageData = img;
+                    thumbnailItemList.Add(addItem);
+                }
             }
 
             ThumbControl.SetThumbResult(thumbnailItemList);