bjba0c7c

1Stream that inherits class Stream and can be serialized C#
2public static byte[] ReadToEnd(this Stream s) {
3    using(var ms = new MemoryStream()) {
4        s.CopyTo(ms);
5        return ms.ToArray();
6    }
7}
8	
9CREATE TABLE [dbo].[Files]
10(
11   [ID] INT IDENTITY(1,1) PRIMARY KEY NOT NULL,
12   [Name] NVARCHAR(255) NOT NULL,
13   [Storage] UNIQUEIDENTIFIER NOT NULL
14);
15	
16/// <summary>
17/// Writes a stream to a file and returns a <see cref="Guid"/> that
18/// can be used to retrieve it again.
19/// </summary>
20/// <param name="incomingFile">The incoming file.</param>
21/// <returns>The <see cref="Guid"/> that should be used to identify the file.</returns>
22public static Guid WriteFile(Stream incomingFile)
23{
24    var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "MyApplication");
25    path = Path.Combine(path, "BinaryData");
26
27    var guid = Guid.NewGuid();
28    var ba = guid.ToByteArray();
29
30    // Create the path for the GUID.
31    path = Path.Combine(ba[0].ToString("x2"));
32    path = Path.Combine(ba[1].ToString("x2"));
33    path = Path.Combine(ba[2].ToString("x2"));
34    Directory.CreateDirectory(path); // Always succeeds, even if the directory already exists.
35
36    path = Path.Combine(guid.ToString() + ".dat");
37    using (var fs = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None))
38    {
39        var buffer = new byte[Environment.SystemPageSize];
40        var length = 0;
41        while ((length = incomingFile.Read(buffer, 0, buffer.Length)) != 0)
42            fs.Write(buffer, 0, buffer.Length);
43    }
44
45    return guid;
46}
47
48/// <summary>
49/// Deletes a file created by <see cref="WriteFile"/>.
50/// </summary>
51/// <param name="guid">The original <see cref="Guid"/> that was returned by <see cref="WriteFile"/>.</param>
52public static void DeleteFile(Guid guid)
53{
54    var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "MyApplication");
55    path = Path.Combine(path, "BinaryData");
56
57    var ba = guid.ToByteArray();
58
59    // Create the path for the GUID.
60    path = Path.Combine(ba[0].ToString("x2"));
61    path = Path.Combine(ba[1].ToString("x2"));
62    path = Path.Combine(ba[2].ToString("x2"));
63    path = Path.Combine(guid.ToString() + ".dat");
64    if (File.Exists(path))
65        File.Delete(path);
66}
67
68/// <summary>
69/// Reads the a file that was created by <see cref="WriteFile"/>.
70/// </summary>
71/// <param name="guid">The original <see cref="Guid"/> that was returned by <see cref="WriteFile"/>.</param>
72/// <returns>The stream that can be used to read the file.</returns>
73public static Stream ReadFile(Guid guid)
74{
75    var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "MyApplication");
76    path = Path.Combine(path, "BinaryData");
77
78    var ba = guid.ToByteArray();
79
80    // Create the path for the GUID.
81    path = Path.Combine(ba[0].ToString("x2"));
82    path = Path.Combine(ba[1].ToString("x2"));
83    path = Path.Combine(ba[2].ToString("x2"));
84    path = Path.Combine(guid.ToString() + ".dat");
85    return new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
86}