public void Dispose()
{
if (Handle != IntPtr.Zero)
{
DDEML.DdeFreeStringHandle(idInst, Handle);
}
}
public void Dispose()
{
if (Handle != IntPtr.Zero && Handle != DDEML.IntPtrOne)
{
DDEML.DdeFreeDataHandle(Handle);
}
}
public void TryConnect(string service, string topic, IDDEConversationListener listener)
{
var op = this.dispatcher.BeginInvoke(new Action(delegate()
{
if (idInst == 0)
{
listener.OnConnect(null);
}
using (var hszService = new DdeStringHandle(idInst, service))
using (var hszTopic = new DdeStringHandle(idInst, topic))
{
var hConv = DDEML.DdeConnect(idInst, hszService.Handle, hszTopic.Handle, IntPtr.Zero);
if (hConv == IntPtr.Zero)
{
var errno = DDEML.DdeGetLastError(idInst);
var error = DDEML.GetErrorString(errno) + " (" + errno.ToString() + ")";
Log.Emit("dde-connect-failed", "service", service, "topic", topic, "error", error);
listener.OnConnect(null);
}
else
{
Log.Emit("dde-connect", "service", service, "topic", topic, "hConv", hConv);
var conv = new Conversation(this, service, topic, hConv, listener);
this.conversations.Add(hConv, conv);
listener.OnConnect(conv);
}
}
}));
}
public void TransactionCompleted(IntPtr transactionId, string itemName, IntPtr hData)
{
Transaction trans;
if (transactions.TryGetValue(transactionId, out trans))
{
transactions.Remove(transactionId);
}
else
{
trans = null;
}
if (trans != null)
{
bool successful = (hData != IntPtr.Zero);
string data = null;
if (hData != IntPtr.Zero && hData != DDEML.IntPtrOne)
{
int length = DDEML.DdeGetData(hData, null, 0, 0);
var buffer = new byte[length];
length = DDEML.DdeGetData(hData, buffer, buffer.Length, 0);
data = Encoding.Unicode.GetString(buffer);
}
trans.Callback(itemName, successful, data);
}
}
public void Disconnect()
{
if (Thread.CurrentThread != this.Client.thread)
{
this.Client.dispatcher.BeginInvoke(new Action(this.Disconnect));
}
else
{
DDEML.DdeDisconnect(Handle);
Log.Emit("dde-disconnect", "hConv", Handle);
this.Disconnected();
};
}
void ThreadMain(object readyEvent)
{
var ddeCallback = new DDEML.DdeCallback(this.DdeCallback);
try
{
dispatcher = Dispatcher.CurrentDispatcher;
int res = DDEML.DdeInitialize(ref idInst, ddeCallback, DDEML.APPCMD_CLIENTONLY, 0);
if (res != DDEML.DMLERR_NO_ERROR)
{
var err_no = DDEML.DdeGetLastError(idInst);
string error = DDEML.GetErrorString(err_no) + " (" + err_no.ToString() + ")";
Log.Emit("dde-init-err", "error", error);
InitializationMessage = error;
idInst = 0;
}
else
{
Log.Emit("dde-init-ok", "id", idInst);
InitializationMessage = "OK";
}
(readyEvent as AutoResetEvent).Set();
Dispatcher.Run();
}
catch (Exception e)
{
Log.Emit("dde-thread-exception", "exception", e);
foreach (var kv in conversations)
{
try
{
kv.Value.Disconnect();
}
catch (Exception e2)
{
Log.Emit("dde-thread-exception", "exception", e2);
}
}
}
GC.KeepAlive(ddeCallback);
}
IntPtr DdeCallback(int uType, int uFmt, IntPtr hConv, IntPtr hsz1, IntPtr hsz2, IntPtr hData, IntPtr dwData1, IntPtr dwData2)
{
string str1 = DDEML.GetString(idInst, hsz1);
string str2 = DDEML.GetString(idInst, hsz2);
Log.Emit("dde-cb", "uType", DDEML.GetTypeString(uType), "uFmt", uFmt, "hConv", hConv, "hsz1", str1, "hsz2", str2, "hData", hData, "dwData1", dwData1, "dwData2", dwData2);
if (hConv == IntPtr.Zero)
{
return(IntPtr.Zero);
}
Conversation conversation;
if (!conversations.TryGetValue(hConv, out conversation))
{
Log.Emit("dde-cb-conv-not-found");
return(IntPtr.Zero);
}
switch (uType)
{
case DDEML.XTYP_ADVDATA:
{
conversation.AdviseReceived(str2);
return(new IntPtr(DDEML.DDE_FACK));
}
case DDEML.XTYP_XACT_COMPLETE:
{
conversation.TransactionCompleted(dwData1, str2, hData);
return(IntPtr.Zero);
}
case DDEML.XTYP_DISCONNECT:
{
conversation.Disconnected();
return(IntPtr.Zero);
}
default:
return(IntPtr.Zero);
}
}
void Transact(string itemName, int wFmt, int wType, DDETransactionCallback callback)
{
Client.dispatcher.BeginInvoke(new Action(delegate()
{
if (Handle == IntPtr.Zero)
{
return;
}
int res = 0;
using (var hsz = new DdeStringHandle(Client.idInst, itemName))
{
using (var hData = new DdeDataHandle(DDEML.DdeClientTransaction(null, 0, Handle, hsz.Handle, wFmt, wType, DDEML.TIMEOUT_ASYNC, ref res)))
{
Log.Emit("dde-transact", "hConv", this.Handle, "item", itemName, "wFmt", wFmt, "wType", DDEML.GetTypeString(wType), "callback", callback != null, "id", res);
if (hData.Handle == IntPtr.Zero)
{
var errno = DDEML.DdeGetLastError(Client.idInst);
Log.Emit("dde-transact-failed", "error", DDEML.GetErrorString(errno) + " (" + errno.ToString() + ")");
if (callback != null)
{
callback(itemName, false, null);
}
this.Disconnect();
}
else
{
if (callback != null)
{
if (res == 0)
{
callback(itemName, false, null);
}
else if (callback != null & res != 0)
{
var id = new IntPtr(res);
transactions.Add(id, new Transaction(id, callback));
}
}
}
}
}
}));
}
public DdeStringHandle(int idInst, string str)
{
this.idInst = idInst;
Handle = DDEML.DdeCreateStringHandle(idInst, str, DDEML.CP_WINANSI);
}
