/// <summary>
/// Gets the set of installed components for products in the indicated context.
/// </summary>
/// <exception cref="InstallerException">The installer configuration data is corrupt</exception>
/// <remarks><p>
/// Win32 MSI API:
/// <a href="http://msdn.microsoft.com/library/dd407947.aspx">MsiEnumComponentsEx</a>
/// </p></remarks>
public static IEnumerable <ComponentInstallation> Components(string szUserSid, UserContexts dwContext)
{
uint pcchSid = 32;
StringBuilder szSid = new StringBuilder((int)pcchSid);
StringBuilder buf = new StringBuilder(40);
UserContexts installedContext;
for (uint i = 0; true; i++)
{
uint ret = NativeMethods.MsiEnumComponentsEx(szUserSid, dwContext, i, buf, out installedContext, szSid, ref pcchSid);
if (ret == (uint)NativeMethods.Error.MORE_DATA)
{
szSid.EnsureCapacity((int)++pcchSid);
ret = NativeMethods.MsiEnumComponentsEx(szUserSid, dwContext, i, buf, out installedContext, szSid, ref pcchSid);
}
if (ret == (uint)NativeMethods.Error.NO_MORE_ITEMS)
{
break;
}
if (ret != 0)
{
throw InstallerException.ExceptionFromReturnCode(ret);
}
yield return(new ComponentInstallation(buf.ToString(), szSid.ToString(), installedContext));
}
}
