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PdfSharp/Silverlight/SilverlightHelper.cs

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+#region PDFsharp - A .NET library for processing PDF
+//
+// Authors:
+//   Stefan Lange
+//
+// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
+//
+// http://www.pdfsharp.com
+// http://sourceforge.net/projects/pdfsharp
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+// DEALINGS IN THE SOFTWARE.
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.IO.IsolatedStorage;
+using System.Runtime.InteropServices;
+
+namespace PdfSharp.Silverlight
+{
+    /// <summary>
+    /// Useful stuff to show PDF files in Silverlight applications for 
+    /// testing and debugging purposes.
+    /// Some functions require elevated trust.
+    /// </summary>
+    public class SilverlightHelper
+    {
+        /// <summary>
+        /// Gets the full path of UserStore for application.
+        /// </summary>
+        public static string FullPathOfUserStoreForApplication
+        {
+            get
+            {
+                if (_fullPathOfUserStoreForApplication != null)
+                    return _fullPathOfUserStoreForApplication;
+
+                // More simple than I expected...
+                string root = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) + @"Low\Microsoft\Silverlight\is";
+                IsolatedStorageFile userStore = IsolatedStorageFile.GetUserStoreForApplication();
+                string markerFile = Guid.NewGuid().ToString();
+                userStore.CreateFile(markerFile).Close();
+                // Won't use Linq here (FirstOrDefault).
+                IEnumerator<string> enumerator = Directory.EnumerateFileSystemEntries(root, markerFile, SearchOption.AllDirectories).GetEnumerator();
+                enumerator.MoveNext();
+                _fullPathOfUserStoreForApplication = Path.GetDirectoryName(enumerator.Current);
+                userStore.DeleteFile(markerFile);
+                return _fullPathOfUserStoreForApplication;
+            }
+        }
+        static string _fullPathOfUserStoreForApplication;
+
+        /// <summary>
+        /// Uses ShellExecute to open a PDF file in UserStore.
+        /// </summary>
+        public static void ShowPdfFileFromUserStore(string path)
+        {
+            string fullPath = Path.Combine(FullPathOfUserStoreForApplication, path);
+            ShellExecute(IntPtr.Zero, "open", fullPath, IntPtr.Zero, null, 5);
+        }
+
+        [DllImport("Shell32.dll")]
+        static extern UInt32 ShellExecute(IntPtr hwnd, string pOperation, string pFile,
+            IntPtr pParameters, string pDirectory, UInt32 nShowCmd);
+    }
+}