通过WinForm获取本地文件的ContentType值

 1using System;
 2using Microsoft.Win32;
 3
 4namespace FrameworkExamples
 5{
 6    //HOW TO: work with the Windows Registry to determine the
 7    //        content-type of a file based on the file extension.
 8
 9    class SampleRegistryContentTypeLookup
10    {
11        static void Main()
12        {
13            //set the default content-type
14            const string DEFAULT_CONTENT_TYPE = "application/unknown";
15
16            RegistryKey   regkey, fileextkey;
17            string        filecontenttype, fileextension;
18
19            //the file extension to lookup
20            fileextension = ".zip";
21
22            try 
23            {
24                //look in HKCR
25                regkey = Registry.ClassesRoot;
26
27                //look for extension
28                fileextkey = regkey.OpenSubKey(fileextension);
29
30                //retrieve Content Type value
31                filecontenttype = fileextkey.GetValue("Content Type", DEFAULT_CONTENT_TYPE).ToString();
32                
33                //cleanup
34                fileextkey = null;
35                regkey = null;
36            }
37            catch
38            {
39                filecontenttype = DEFAULT_CONTENT_TYPE;
40            }
41            
42            //print the content type
43            Console.WriteLine(filecontenttype);
44        }
45    }
46}
47