[C#]取得MIME Content Type對應的檔案副檔名

續[C#]取得檔案對應的MIME Content Type這篇,這次反過來若是想知道MIME Content Type對應到的副檔名有哪些的話,一樣我們可以從登錄檔中取得,像是下面這樣:

private static IEnumerable<string> GetMIMESupportedExt(string mime)
{
var linq = from item in Microsoft.Win32.Registry.ClassesRoot.GetSubKeyNames()
let key = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(item)
let value = key.GetValue(“Content Type”)
where value != null && value.ToString().Equals(mime, StringComparison.CurrentCultureIgnoreCase)
select item;
return linq;
}

 

完整的範例如下:


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication11
{
class Program
{
static void Main(string[] args)
{
foreach (var item in GetMIMESupportedExt(“video/x-ms-asf”))
{
Console.WriteLine(item); ;
}
}

private static IEnumerable<string> GetMIMESupportedExt(string mime)
{
var linq = from item in Microsoft.Win32.Registry.ClassesRoot.GetSubKeyNames()
let key = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(item)
let value = key.GetValue(“Content Type”)
where value != null && value.ToString().Equals(mime, StringComparison.CurrentCultureIgnoreCase)
select item;
return linq;
}
}
}


運行結果:


image