// Token: 0x06006CBD RID: 27837 RVA: 0x001F4A30 File Offset: 0x001F2C30
private string GetFilterClsid(ContentType contentType, Uri partUri)
{
string text = null;
if (contentType != null && !ContentType.Empty.AreTypeAndSubTypeEqual(contentType))
{
text = this.FileTypeGuidFromMimeType(contentType);
}
else
{
string partExtension = this.GetPartExtension(partUri);
if (partExtension != null)
{
text = this.FileTypeGuidFromFileExtension(partExtension);
}
}
if (text == null)
{
return(null);
}
RegistryKey registryKey = PackageFilter.FindSubkey(Registry.ClassesRoot, PackageFilter.MakeRegistryPath(this._IFilterAddinPath, new string[]
{
text
}));
if (registryKey == null)
{
return(null);
}
return((string)registryKey.GetValue(null));
}
// Token: 0x06006CC0 RID: 27840 RVA: 0x001F4B28 File Offset: 0x001F2D28
private string FileTypeGuidFromFileExtension(string dottedExtensionName)
{
RegistryKey registryKey = PackageFilter.FindSubkey(Registry.ClassesRoot, PackageFilter.MakeRegistryPath(this._persistentHandlerKey, new string[]
{
dottedExtensionName
}));
if (registryKey != null)
{
return((string)registryKey.GetValue(null));
}
return(null);
}
// Token: 0x06006CBF RID: 27839 RVA: 0x001F4AD4 File Offset: 0x001F2CD4
private string FileTypeGuidFromMimeType(ContentType contentType)
{
RegistryKey registryKey = PackageFilter.FindSubkey(Registry.ClassesRoot, this._mimeContentTypeKey);
RegistryKey registryKey2 = (registryKey == null) ? null : registryKey.OpenSubKey(contentType.ToString());
if (registryKey2 == null)
{
return(null);
}
string text = (string)registryKey2.GetValue("Extension");
if (text == null)
{
return(null);
}
return(this.FileTypeGuidFromFileExtension(text));
}