public string Register(string service)
{
if (IsRegistered || _InstanceId != 0)
{
throw new InvalidOperationException("AlreadyRegisteredMessage");
}
if (service == null || service.Length > Ddeml.MAX_STRING_SIZE)
{
throw new ArgumentNullException("service");
}
_Service = service;
_ConversationTable.Clear();
_InstanceId = Initialize(Ddeml.APPCLASS_STANDARD);
_ServiceHandle = Ddeml.DdeCreateStringHandle(_InstanceId, _Service, Ddeml.CP_WINANSI);
// Register the service name.
if (Ddeml.DdeNameService(_InstanceId, _ServiceHandle, IntPtr.Zero, Ddeml.DNS_REGISTER) == IntPtr.Zero)
{
Ddeml.DdeFreeStringHandle(_InstanceId, _ServiceHandle);
_ServiceHandle = IntPtr.Zero;
}
// If the service handle is null then the service name could not be registered.
if (_ServiceHandle == IntPtr.Zero)
{
int error = Ddeml.DdeGetLastError(_InstanceId);
return(Ddeml.DDEGetErrorMsg(error));
}
return(null);
}
public void Advise(string topic, string item)
{
if (IsDisposed)
{
throw new ObjectDisposedException(this.GetType().ToString());
}
if (!IsRegistered)
{
throw new InvalidOperationException("NotRegisteredMessage");
}
if (topic == null || topic.Length > Ddeml.MAX_STRING_SIZE)
{
throw new ArgumentNullException("topic");
}
if (item == null || item.Length > Ddeml.MAX_STRING_SIZE)
{
throw new ArgumentNullException("item");
}
// Assume the topic name and item name are wild.
IntPtr topicHandle = topic != "*" ? Ddeml.DdeCreateStringHandle(_InstanceId, topic, Ddeml.CP_WINANSI) : IntPtr.Zero;
IntPtr itemHandle = item != "*" ? Ddeml.DdeCreateStringHandle(_InstanceId, item, Ddeml.CP_WINANSI) : IntPtr.Zero;
// Check the result to see if the post failed.
if (!Ddeml.DdePostAdvise(_InstanceId, topicHandle, itemHandle))
{
int error = Ddeml.DdeGetLastError(_InstanceId);
var msg = Ddeml.DDEGetErrorMsg(error); if (msg != null)
{
}
}
Ddeml.DdeFreeStringHandle(_InstanceId, itemHandle);
Ddeml.DdeFreeStringHandle(_InstanceId, topicHandle);
}
// [10/24/2003]
//主动请求Item的值
public unsafe string Request(string name)
{
IntPtr hszItem, hDDEData;
int dwResult = 0;
int dwLength = 0;
if (name != null && hconvCurrent != IntPtr.Zero)
{
hszItem = Ddeml.DdeCreateStringHandle(dwDDEInst, name, Ddeml.CP_WINANSI);
hDDEData = Ddeml.DdeClientTransaction(null,
0,
hconvCurrent,
hszItem,
ConversionFormat.TEXT, //CF_TEXT,
(int)Ddeml.XTYP_REQUEST,
5000, // ms timeout
ref dwResult);
Ddeml.DdeFreeStringHandle(dwDDEInst, hszItem);
if (hDDEData != IntPtr.Zero)
{
sbyte *pData = (sbyte *)Ddeml.DdeAccessData(hDDEData, ref dwLength);
{
if ((pData != null) && (dwLength != 0))
{
return(new string(pData, 0, dwLength));
}
}
}
}
return(null);
}
//与Server建立Hoot连接
public unsafe bool TransactItem(string name)
{
IntPtr hszItem, hDDEData;
int dwResult = 0;
if (string.IsNullOrEmpty(name))
{
return(false);
}
if (hconvCurrent != IntPtr.Zero)
{
hszItem = Ddeml.DdeCreateStringHandle(dwDDEInst, name, Ddeml.CP_WINANSI);
hDDEData = Ddeml.DdeClientTransaction(null,
0,
hconvCurrent,
hszItem,
ConversionFormat.TEXT, //CF_TEXT,
Ddeml.XTYP_ADVSTART,
Ddeml.TIMEOUT_ASYNC, // ms timeout
ref dwResult);
Ddeml.DdeFreeStringHandle(dwDDEInst, hszItem);
if (hDDEData != IntPtr.Zero)
{
try
{
int dwLength = 0;
sbyte *pData = (sbyte *)Ddeml.DdeAccessData(hDDEData, ref dwLength);
if ((pData != null) && (dwLength != 0))
{
if (DDEValueChange != null)
{
DDEValueChange(this, new DDEValueChangeEventArgs(name, new string(pData, 0, dwLength)));
}
}
}
catch { }
finally
{
Ddeml.DdeUnaccessData(hDDEData);
}
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
public unsafe bool Connect()
{
IntPtr hConv, hszService, hszTopic;
if (dwDDEInst != 0)
{
Ddeml.DdeUninitialize(dwDDEInst);
dwDDEInst = 0;
}
if (hconvCurrent != IntPtr.Zero)
{
Ddeml.DdeDisconnect(hconvCurrent);
hconvCurrent = IntPtr.Zero;
}
;
//如果是第一次，则什么也不做
Ddeml.DdeInitialize(ref dwDDEInst, _Callback, 0x3f000, 0);
// Connect to the server
hszTopic = Ddeml.DdeCreateStringHandle(dwDDEInst, _topic, Ddeml.CP_WINANSI);
hszService = Ddeml.DdeCreateStringHandle(dwDDEInst, _server, Ddeml.CP_WINANSI);
CONVCONTEXT cc = new CONVCONTEXT();
cc.cb = sizeof(CONVCONTEXT);
hConv = Ddeml.DdeConnect(dwDDEInst, hszService, hszTopic, ref cc);
//int DdeErrcode = Win32.DdeGetLastError(dwDDEInst);
Ddeml.DdeFreeStringHandle(dwDDEInst, hszTopic);
Ddeml.DdeFreeStringHandle(dwDDEInst, hszService);
if (hConv != IntPtr.Zero)
{
if (hconvCurrent != IntPtr.Zero)
{
Ddeml.DdeDisconnect(hconvCurrent);
}
hconvCurrent = hConv;
_connected = true;
return(true);
}
else
{
_connected = false;
return(false);
}
}
//必须设置item.ItemName和item.ItemValue后调用
public int Poke(string name, string value)
{
IntPtr hszItem, hDDEData;
int dwResult = 0;
if (string.IsNullOrEmpty(name))
{
return(-2);
}
if (hconvCurrent != IntPtr.Zero)
{
hszItem = Ddeml.DdeCreateStringHandle(dwDDEInst, name, Ddeml.CP_WINANSI);
if (!string.IsNullOrEmpty(name))
{
//int errcode=Win32.DdeGetLastError(dwDDEInst);
byte[] ByteArray = Encoding.ASCII.GetBytes(value);
IntPtr hd = Ddeml.DdeCreateDataHandle(dwDDEInst, ByteArray, ByteArray.Length, 0, hszItem, ConversionFormat.TEXT, 0);
hDDEData = Ddeml.DdeClientTransaction(
ByteArray, ByteArray.Length,
hconvCurrent, hszItem,
ConversionFormat.TEXT, //CF_TEXT,
Ddeml.XTYP_POKE,
Ddeml.TIMEOUT_ASYNC, // ms timeout
ref dwResult);
Ddeml.DdeFreeStringHandle(dwDDEInst, hszItem);
if (hDDEData != IntPtr.Zero)
{
return(1);
}
}
return(-1);
}
else
{
return(-1);
}
}
// Arrête une transaction Advise.
public void AdvStop(IntPtr hConv, string item, ConversionFormat wFormat)
{
if (!IsRegistered)
{
return;
}
// Création de la chaîne DDE de l'élément.
IntPtr hszItem = Ddeml.DdeCreateStringHandle(_InstanceId, item, Ddeml.CP_WINANSI);
if ((hszItem == IntPtr.Zero) && (item.Length != 0))
{
return;
}
// Exécution de la transaction.
int res = 0;
Ddeml.DdeClientTransaction(null, 0, hConv, hszItem, wFormat, Ddeml.XTYP_ADVSTOP, Ddeml.TIMEOUT_ASYNC, ref res);
// Libération de la chaîne DDE.
if (hszItem != IntPtr.Zero)
{
Ddeml.DdeFreeStringHandle(_InstanceId, hszItem);
}
}
// Démarre une transaction Advise.
public bool AdvStart(IntPtr hConv, string item, ConversionFormat wFormat, int wFlag)
{
if (!IsRegistered)
{
return(false);
}
int res = 0;
// Création de la chaîne DDE de l'élément.
IntPtr hszItem = Ddeml.DdeCreateStringHandle(_InstanceId, item, Ddeml.CP_WINANSI);
if ((hszItem == IntPtr.Zero) && (item.Length != 0))
{
return(false);
}
// Exécution de la transaction.
Ddeml.DdeClientTransaction(null, 0, hConv, hszItem, wFormat, (wFlag == Ddeml.XTYPF_ACKREQ) ?
(Ddeml.XTYP_ADVSTARTACKREQ) : ((wFlag == Ddeml.XTYPF_NODATA) ? (Ddeml.XTYP_ADVSTARTNODATA) : (Ddeml.XTYP_ADVSTART)), Ddeml.TIMEOUT_ASYNC, ref res);
// Libération de la chaîne DDE.
if (hszItem != IntPtr.Zero)
{
Ddeml.DdeFreeStringHandle(_InstanceId, hszItem);
}
return(res != 0);
}
