SWT: Drop an Outlook Email（转发）-优快云博客

本文介绍如何使用C#实现从Outlook中拖拽邮件到Eclipse RCP应用，并解析邮件内容。通过注册剪贴板格式、获取IStorage对象及遍历STATSTG数据来提取邮件数据。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

I wanted to drop an outlook email to my RCP application and as always I asked google to help me. You don't find much on this, an older post was
http://www.eclipse.org/forums/index.php?t=msg&&th=147516&goto=464661

That got me startet. The damn it didn't work, I asked on the forum again and the answer made confusion even greater:

http://www.eclipse.org/forums/index.php?t=rview&goto=519397#msg_519397

gladly my wife gladly does some more windows thingy's with c# and with her help and a c# example i found out that i have to make an os call to get the type of the transfer that may change with every boot.

public static int registerType() {

// Look name up in the registry

// If name is not in registry, add it and return assigned value.

// If name already exists in registry, return its assigned value

TCHAR chFormatName = new TCHAR(0, "FileContents", true);

return OS.RegisterClipboardFormat(chFormatName);

}

Then at least the stuff from the first post started to do something, i could get an IStorage and enumerate over the STATSTG's

public Object nativeToJava(TransferData transferData) {

IDataObject idata = new IDataObject(transferData.pIDataObject);

idata.AddRef();

FORMATETC formatetc = new FORMATETC();

STGMEDIUM stgmedium = new STGMEDIUM();

formatetc.cfFormat = type;

formatetc.lindex = 0;

formatetc.ptd = 0;

formatetc.tymed = 4 | 8 | 1;

formatetc.dwAspect = COM.DVASPECT_CONTENT;

transferData.result = getData(idata, formatetc, stgmedium);

idata.Release();

if (transferData.result != COM.S_OK) {

System.out.println("Fehler" + transferData.result);

return null;

}

if ((stgmedium.tymed & 8) == 8) {

// IStorage

IStorage storage = new IStorage(stgmedium.unionField);

storage.AddRef();

long[] x = new long[1];

long ret = storage.EnumElements(0, 0, 0, x);

IEnumSTATSTG enumSTATSTG = new IEnumSTATSTG(x[0]);

enumSTATSTG.AddRef();

STATSTG[] data = new STATSTG[0];

// Loop over enumerator

long rgelt = OS.GlobalAlloc(OS.GMEM_FIXED | OS.GMEM_ZEROINIT, STATSTG.sizeof);

int[] pceltFetched = new int[1];

enumSTATSTG.Reset();

while (enumSTATSTG.Next(1, rgelt, pceltFetched) == COM.S_OK && pceltFetched[0] == 1) {

STATSTG statstg = new STATSTG();

COM.MoveMemory(statstg, rgelt, STATSTG.sizeof);

STATSTG[] newData = new STATSTG[data.length + 1];

System.arraycopy(data, 0, newData, 0, data.length);

newData[data.length] = statstg;

data = newData;

}

OS.GlobalFree(rgelt);

enumSTATSTG.Release();

// do something with STATSTG[]

but i still did not know what the heck to do with these objects. I started to search again and finally found an example in the eclipse OleClient:

private byte[] readStream(IStorage storage, String stream) {

boolean success = false;

long[] address = new long[1];

// Look for a CONTENTS stream

if (storage.OpenStream(stream, 0, COM.STGM_DIRECT | COM.STGM_READ | COM.STGM_SHARE_EXCLUSIVE, 0, address) == COM.S_OK) {

IStream tempContents = new IStream(address[0]);

tempContents.AddRef();

try {

ByteArrayOutputStream w = new ByteArrayOutputStream();

int increment = 1024 * 4;

long pv = COM.CoTaskMemAlloc(increment);

int[] pcbWritten = new int[1];

while (tempContents.Read(pv, increment, pcbWritten) == COM.S_OK && pcbWritten[0] > 0) {

byte[] buffer = new byte[pcbWritten[0]];

OS.MoveMemory(buffer, pv, pcbWritten[0]);

w.write(buffer);

success = true;

}

COM.CoTaskMemFree(pv);

w.close();

return w.toByteArray();

} catch (IOException err) {

} finally {

tempContents.Release();

}

}

return null;

}

now with that I can read Streams from the IStorage. What streams there are is in the STATSTG's

// do something with STATSTG[]

Map result = new HashMap();

for (STATSTG s : data) {

String stream = getString(s.pwcsName);

result.put(stream, readStream(storage, stream));

}

storage.Release();

return result;