.NET/Java PDF, Tiff, Barcode SDK Library

Notice that there are two stores in that example. One is identified by some assembly evidence (the strong name key, name, and major version info). The other is identified by both domain and assembly evidence. Because the sample application is in a single assembly, the assembly evidence for both stores happens to be identical!

You can also add the /REMOVE parameter which will delete all of the isolated storage in use at the specified scope. Be very careful if you do this, as you may well delete storage used by another application entirely.

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Figure B-3. ~/.bashrc is modified so that Drush is recognized as an executable script. Finally, you need to enable Drush modules if you are using any. This is simply a matter of downloading all Drush modules to a single directory (see Figure B-4). Depending on how you share software, you may want to symlink to a single version or download all modules into ~/.drush.

That s all very well, but you can t see the place where those files are stored. That s because the actual storage is intended to be abstracted away behind the API. Sometimes, however, it is useful to be able to go and pry into the actual storage itself.

In the newly created folder, create an IsapiRewrite4.ini file and add the following line:

Remember, this is an implementation detail, and it could change between versions. It has been consistent since the first version of the .NET Framework, but in the future, Microsoft could decide to store it all in one big file hidden away somewhere, or using some mystical API that we don t have access to.

We can take advantage of the fact that the debugger can show us the private innards of the IsolatedStorageFile class. If we set a breakpoint on the store.CreateFile line in our sample application, we can inspect the IsolatedStorageFile object that was returned by GetUserStoreForApplication in the previous line. You will see that there is a private field called m_RootDir. This is the actual root directory (in the real filesystem) for the store. You can see an example of that as it is on my machine in Figure 11-12.

RewriteRule ^( !/Content)(/[A-Za-z0-9_-]+)(/.*) $ $1.mvc$2 [I]

If you copy that path and browse to it using Windows Explorer, you ll see something like the folder in Figure 11-13. There s the Settings directory that we created! As you might expect, if you were to look inside, you d see the standardsettings.txt file our program created.

As you can see, this is a very useful debugging technique, allowing you to inspect and modify the contents of files in isolated storage, and identify exactly which store you have for a particular scope. It does rely on implementation details, but since you d only ever do this while debugging, the code you ultimately ship won t depend on any nonpublic features of isolated storage. OK. So far, we ve seen two different types of stream; a regular file, and an isolated storage file. We use our familiar stream tools and techniques (like StreamReader and StreamWriter), regardless of the underlying type. So, what other kinds of stream exist Well, there are lots; several subsystems in the .NET framework provide stream-based APIs. We ll see some networking ones in 13, for example. Another example is from the .NET Framework s security features: CryptoStream (which is used for encrypting and decrypting a stream of data). There s also a MemoryStream in System.IO which uses memory to store the data in the stream.

Figure B-4. To enable Drush modules, add the modules into a drush_mods folder and symlink the folder .drush in the user s home directory. After enabling Drush, type drush help at the command prompt for a list of available commands.

A dictionary is a collection that enables you to look up information associated with some kind of value. .NET calls this sort of collection a dictionary because it is reminiscent of a traditional printed dictionary: the information is structured to make it easy to find the entry for a particular word if you know what word you re looking for, you can find it very quickly even among tens of thousands of definitions. The information you find when you ve looked up the word depends on the sort of dictionary you bought it might provide a definition of the word, but other kinds exist, such as dictionaries of quotations, or of etymology. Likewise, a .NET dictionary collection is structured to enable quick and easy lookup of entries. The syntax looks very similar to array access, but where you d expect to see a number, the index can be something else, such as a string, as shown in Example 9-1.

Open the Properties dialog box for the website containing the MVC application in IIS Manager. In the ISAPI Filters tab in the Properties dialog box, click Add. Enter a name for the Filter Name value, and enter the path to the IsapiRewrite4.dll for the Executable value, as shown in figure 6.12.

string definition = myDictionary["sea"];