Version 4.13.0

FileDbCache/UWP/FileDbCache.UWP.cs

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+// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
+// © 2019 Clemens Fischer
+// Licensed under the Microsoft Public License (Ms-PL)
+
+using System;
+using System.IO;
+using System.Runtime.InteropServices.WindowsRuntime;
+using System.Threading.Tasks;
+using Windows.Storage;
+using Windows.Storage.Streams;
+using Windows.UI.Xaml;
+
+namespace MapControl.Caching
+{
+    public partial class FileDbCache : IImageCache
+    {
+        public FileDbCache(StorageFolder folder, string fileName = "TileCache.fdb")
+        {
+            if (folder == null)
+            {
+                throw new ArgumentNullException("The parameter folder must not be null.");
+            }
+
+            if (string.IsNullOrEmpty(fileName))
+            {
+                throw new ArgumentNullException("The parameter fileName must not be null.");
+            }
+
+            dbPath = Path.Combine(folder.Path, "TileCache.fdb");
+
+            Open();
+
+            Application.Current.Resuming += (s, e) => Open();
+            Application.Current.Suspending += (s, e) => Close();
+        }
+
+        public Task<ImageCacheItem> GetAsync(string key)
+        {
+            if (key == null)
+            {
+                throw new ArgumentNullException("The parameter key must not be null.");
+            }
+
+            return Task.Run(() =>
+            {
+                var record = GetRecordByKey(key);
+
+                if (record == null)
+                {
+                    return null;
+                }
+
+                return new ImageCacheItem
+                {
+                    Buffer = ((byte[])record[0]).AsBuffer(),
+                    Expiration = (DateTime)record[1]
+                };
+            });
+        }
+
+        public Task SetAsync(string key, IBuffer buffer, DateTime expiration)
+        {
+            if (key == null)
+            {
+                throw new ArgumentNullException("The parameter key must not be null.");
+            }
+
+            if (buffer == null)
+            {
+                throw new ArgumentNullException("The parameter buffer must not be null.");
+            }
+
+            return Task.Run(() => AddOrUpdateRecord(key, buffer.ToArray(), expiration));
+        }
+    }
+}