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POWindows Phone 8 - Navigation Error
 

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    <p>I have a file in <code>IsolatedStorage</code>. If the file exists, I want to redirect to the login page or Create Account page.</p> <p>If the file doesnt exist, the app goes to the Create page, a password is created and saved, and the app redirects to the Login page. However, if the file in IsolatedStorage exists, it won't direct.</p> <pre><code>private void fileExists() { IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication(); if (store.FileExists("passwordFile")) { //NavigationService.Navigate(new Uri("/Login.xaml", UriKind.Relative)); MessageBox.Show("Should be redirecting here"); } else { MessageBox.Show("Welcome. Please create an account. Ensure that you remember your password!"); } } </code></pre> <p>The actual message does show so it's being called and if a file does not exist, the else is executed so my logic is sound.</p> <p>The <code>FileExists()</code> function is called here.</p> <pre><code>public MainPage() { InitializeComponent(); fileExists(); } </code></pre> <p>The other redirect happens here</p> <pre><code>if ((password1.Password == password2.Password) &amp; (password1.Password.Trim().Length &gt; 0 || password2.Password.Trim().Length &gt; 0)) { byte[] PasswordByte = Encoding.UTF8.GetBytes(password1.Password); byte[] ProtectedPassword = ProtectedData.Protect(PasswordByte, null); this.WritePasswordToFile(ProtectedPassword); NavigationService.Navigate(new Uri("/Login.xaml", UriKind.Relative)); } </code></pre> <p>The error is a <code>System.NullReferenceException</code> but was not handled in user code.</p>
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    1. USChris O'Brien
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    1. COreal offtopic here, please hash or encrypt your passwordFile, with some fancy coding and modded WP8 it easily to access the isolatedStorage
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    2. COI will be, it's literally just the start! I just started C# and WP yesterday and encryption is a big part of the project, but not something that I will be looking at for a few weeks. Thanks though!
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