/// <summary>
/// Tries to save the changes we just made
/// </summary>
/// <param name="mailItem"></param>
/// <returns></returns>
public static bool SaveChanges(Item mailItem)
{
// Pointer to IUnknown Interface
IntPtr IUnknown = IntPtr.Zero;
// Pointer to IMAPIProp Interface
IntPtr IMAPIProp = IntPtr.Zero;
// if we have no MAPIObject everything is senseless...
if (mailItem == null)
{
return(false);
}
try {
// We can pass NULL here as parameter, so we do it.
MAPIInitialize(IntPtr.Zero);
// retrive the IUnknon Interface from our MAPIObject comming from Outlook.
IUnknown = Marshal.GetIUnknownForObject(mailItem.MAPIOBJECT);
// create a Guid that we pass to retreive the IMAPIProp Interface.
Guid guidIMAPIProp = new Guid(IID_IMAPIProp);
// try to retrieve the IMAPIProp interface from IMessage Interface, everything else is sensless.
if (Marshal.QueryInterface(IUnknown, ref guidIMAPIProp, out IMAPIProp) != 0)
{
return(false);
}
IMAPIProp mapiProp = (IMAPIProp)Marshal.GetTypedObjectForIUnknown(IUnknown, typeof(IMAPIProp));
return(mapiProp.SaveChanges(KEEP_OPEN_READWRITE) == 0);
} catch (Exception ex) {
LOG.Error(ex);
return(false);
} finally {
// cleanup all references to COM Objects
if (IMAPIProp != IntPtr.Zero)
{
Marshal.Release(IMAPIProp);
}
//if (IMessage != IntPtr.Zero) Marshal.Release(IMessage);
if (IUnknown != IntPtr.Zero)
{
Marshal.Release(IUnknown);
}
}
}
/// <summary>
/// Use MAPI32.DLL "HrSetOneProp" from managed code
/// </summary>
/// <param name="attachment"></param>
/// <param name="proptag"></param>
/// <param name="propertyValue"></param>
/// <returns></returns>
public static bool SetMAPIProperty(IAttachment attachment, PropTags proptag, string propertyValue)
{
// Pointer to IUnknown Interface
IntPtr IUnknown = IntPtr.Zero;
// Pointer to IMAPIProp Interface
IntPtr IMAPIProp = IntPtr.Zero;
// Structure that will hold the Property Value
SPropValue propValue;
// A pointer that points to the SPropValue structure
IntPtr ptrPropValue = IntPtr.Zero;
object mapiObject = attachment.MAPIOBJECT;
// if we have no MAPIObject everything is senseless...
if (mapiObject == null)
{
return(false);
}
try {
// We can pass NULL here as parameter, so we do it.
MAPIInitialize(IntPtr.Zero);
// retrive the IUnknon Interface from our MAPIObject comming from Outlook.
IUnknown = Marshal.GetIUnknownForObject(mapiObject);
// create a Guid that we pass to retreive the IMAPIProp Interface.
Guid guidIMAPIProp = new Guid(IID_IMAPIProp);
// try to retrieve the IMAPIProp interface from IMessage Interface, everything else is sensless.
if (Marshal.QueryInterface(IUnknown, ref guidIMAPIProp, out IMAPIProp) != 0)
{
return(false);
}
// double check, if we wave no pointer, exit...
if (IMAPIProp == IntPtr.Zero)
{
return(false);
}
// Create structure
propValue = new SPropValue();
propValue.propTag = (uint)proptag;
// Create Ansi string
propValue.Value = Marshal.StringToHGlobalUni(propertyValue);
// Create unmanaged memory for structure
ptrPropValue = Marshal.AllocHGlobal(Marshal.SizeOf(propValue));
// Copy structure to unmanged memory
Marshal.StructureToPtr(propValue, ptrPropValue, false);
// Set the property
HrSetOneProp(IMAPIProp, ptrPropValue);
// Free string
Marshal.FreeHGlobal(propValue.Value);
IMAPIProp mapiProp = (IMAPIProp)Marshal.GetTypedObjectForIUnknown(IUnknown, typeof(IMAPIProp));
return(mapiProp.SaveChanges(4) == 0);
} catch (Exception ex) {
LOG.Error(ex);
return(false);
} finally {
// Free used Memory structures
if (ptrPropValue != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrPropValue);
}
// cleanup all references to COM Objects
if (IMAPIProp != IntPtr.Zero)
{
Marshal.Release(IMAPIProp);
}
//if (IMessage != IntPtr.Zero) Marshal.Release(IMessage);
if (IUnknown != IntPtr.Zero)
{
Marshal.Release(IUnknown);
}
MAPIUninitialize();
}
}
/// <summary>
/// Uses the IMAPIPROP.SetProps to set the content ID
/// </summary>
/// <param name="attachment"></param>
/// <param name="contentId"></param>
public static void SetContentID(IAttachment attachment, string contentId)
{
// Pointer to IUnknown Interface
IntPtr IUnknown = IntPtr.Zero;
// Pointer to IMAPIProp Interface
IntPtr IMAPIProp = IntPtr.Zero;
// A pointer that points to the SPropValue structure
IntPtr ptrPropValue = IntPtr.Zero;
// Structure that will hold the Property Value
SPropValue propValue;
// if we have no MAPIObject everything is senseless...
if (attachment == null)
{
return;
}
try {
// We can pass NULL here as parameter, so we do it.
MAPIInitialize(IntPtr.Zero);
// retrive the IUnknon Interface from our MAPIObject comming from Outlook.
IUnknown = Marshal.GetIUnknownForObject(attachment.MAPIOBJECT);
IMAPIProp mapiProp = (IMAPIProp)Marshal.GetTypedObjectForIUnknown(IUnknown, typeof(IMAPIProp));
// Create structure
propValue = new SPropValue();
propValue.propTag = (uint)PropTags.PR_ATTACH_CONTENT_ID;
//propValue.propTag = 0x3712001E;
// Create Ansi string
propValue.Value = Marshal.StringToHGlobalUni(contentId);
// Create unmanaged memory for structure
ptrPropValue = Marshal.AllocHGlobal(Marshal.SizeOf(propValue));
// Copy structure to unmanged memory
Marshal.StructureToPtr(propValue, ptrPropValue, false);
mapiProp.SetProps(1, ptrPropValue, IntPtr.Zero);
propValue.propTag = (uint)PropTags.PR_ATTACH_CONTENT_LOCATION;
// Copy structure to unmanged memory
Marshal.StructureToPtr(propValue, ptrPropValue, false);
mapiProp.SetProps(1, ptrPropValue, IntPtr.Zero);
// Free string
Marshal.FreeHGlobal(propValue.Value);
mapiProp.SaveChanges(KEEP_OPEN_READWRITE);
} catch (Exception ex) {
LOG.Error(ex);
} finally {
// Free used Memory structures
if (ptrPropValue != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrPropValue);
}
// cleanup all references to COM Objects
if (IMAPIProp != IntPtr.Zero)
{
Marshal.Release(IMAPIProp);
}
//if (IMessage != IntPtr.Zero) Marshal.Release(IMessage);
if (IUnknown != IntPtr.Zero)
{
Marshal.Release(IUnknown);
}
}
}