/// <summary>
/// Gets the MIME content type for a given path extension.
///
/// </summary>
/// <param name="extension">The input path extension.</param><param name="def">The default content type to return if any error occurs.</param>
/// <returns>
/// The path extension's MIME content type.
/// </returns>
public static string GetContentTypeForExtension(string extension, string def)
{
PermissionHelper permissionHelper = new PermissionHelper();
if (string.IsNullOrEmpty(extension))
return def;
string str = "";
if (!permissionHelper.GetIsRegistryAvailable())
str = !HtmlWeb.MimeTypes.ContainsKey(extension) ? def : HtmlWeb.MimeTypes[extension];
if (!permissionHelper.GetIsDnsAvailable())
{
try
{
RegistryKey registryKey = Registry.ClassesRoot.OpenSubKey(extension, false);
if (registryKey != null)
str = (string) registryKey.GetValue("", (object) def);
}
catch (Exception ex)
{
str = def;
}
}
return str;
}
/// <summary>
/// Gets the path extension for a given MIME content type.
///
/// </summary>
/// <param name="contentType">The input MIME content type.</param><param name="def">The default path extension to return if any error occurs.</param>
/// <returns>
/// The MIME content type's path extension.
/// </returns>
public static string GetExtensionForContentType(string contentType, string def)
{
PermissionHelper permissionHelper = new PermissionHelper();
if (string.IsNullOrEmpty(contentType))
return def;
string str = "";
if (!permissionHelper.GetIsRegistryAvailable())
{
if (HtmlWeb.MimeTypes.ContainsValue(contentType))
{
foreach (KeyValuePair<string, string> keyValuePair in HtmlWeb.MimeTypes)
{
if (keyValuePair.Value == contentType)
return keyValuePair.Value;
}
}
return def;
}
if (permissionHelper.GetIsRegistryAvailable())
{
try
{
RegistryKey registryKey = Registry.ClassesRoot.OpenSubKey("MIME\\Database\\Content Type\\" + contentType, false);
if (registryKey != null)
str = (string) registryKey.GetValue("Extension", (object) def);
}
catch (Exception ex)
{
str = def;
}
}
return str;
}