public override string ToString()
{
StringBuilder sb = new StringBuilder("OPCIST: ", 256);
sb.AppendFormat("error=0x{0:x} hclt=0x{1:x}", Error, HandleClient);
if (Error == HRESULTS.S_OK)
{
sb.AppendFormat(" val={0} time={1} qual=", DataValue, TimeStamp);
sb.Append(OpcGroup.QualityToString(Quality));
}
return(sb.ToString());
}
public OPCItemState[] Read(int[] arrHSrv)
{
OPCItemState[] arrStat;
arrStat = null;
int count = arrHSrv.Length;
IntPtr ptrStat;
IntPtr ptrErr;
int hresult = ifSync.Read(OPCDATASOURCE.OPC_DS_DEVICE, count, arrHSrv, out ptrStat, out ptrErr);
if (HRESULTS.Failed(hresult))
{
#region 新建组读取
values = new List <ItemValue>();
readed = false;
OPC.Data.OpcGroup grouop = new OpcGroup("wef2", true, 500, 500, 0);
this.group = grouop;
this.Server.OpcGroups.Add(grouop);
grouop.DataChanged += new DataChangeEventHandler(grouop_DataChanged);
int index = 0;
foreach (int hid in arrHSrv)
{
OPCItem item = this.Items.GetItemByServerHandler(hid);
values.Add(new ItemValue(item.ID, null));
}
foreach (int hid in arrHSrv)
{
OPCItem item = this.Items.GetItemByServerHandler(hid);
OPCItem newItem = new OPCItem(item.ID, index);
grouop.Items.Add(newItem);
index++;
}
while (true)
{
if (readed)
{
OPCItemState[] states = new OPCItemState[arrHSrv.Length];
for (int i = 0; i < states.Length; i++)
{
states[i] = values[i].value;
}
this.group = null;
grouop.Items.Clear();
this.Server.OpcGroups.Remove(grouop);
return(states);
}
Thread.Sleep(20);
}
#endregion
if (HRESULTS.Failed(hresult))
{
throw (new Exception("读取Item值出错，public OPCItemState[] Read(int[] arrHSrv)函数ifSync.Read(OPCDATASOURCE.OPC_DS_CACHE, count, arrHSrv, out ptrStat, out ptrErr)语句"));
}
}
int runErr = (int)ptrErr;
int runStat = (int)ptrStat;
if ((runErr == 0) || (runStat == 0))
{
Marshal.ThrowExceptionForHR(HRESULTS.E_ABORT);
}
arrStat = new OPCItemState[count];
for (int i = 0; i < count; i++)
{ // WORKAROUND !!!
OPCItemState item = new OPCItemState();
arrStat[i] = item;
item.Error = Marshal.ReadInt32((IntPtr)runErr);
runErr += 4;
item.HandleClient = Marshal.ReadInt32((IntPtr)runStat);
if (HRESULTS.Succeeded(item.Error))
{
short vt = Marshal.ReadInt16((IntPtr)(runStat + 16));
if (vt == (short)VarEnum.VT_ERROR)
{
item.Error = Marshal.ReadInt32((IntPtr)(runStat + 24));
}
try
{
item.TimeStamp = DateTime.FromFileTime(Marshal.ReadInt64((IntPtr)(runStat + 4)));
}
catch
{
}
try
{
item.QualityString = OpcGroup.QualityToString(Marshal.ReadInt16((IntPtr)(runStat + 12)));
}
catch
{
}
item.DataValue = Marshal.GetObjectForNativeVariant((IntPtr)(runStat + 16));
DUMMY_VARIANT.VariantClear((IntPtr)(runStat + 16));
}
else
{
item.DataValue = null;
}
runStat += 32;
}
Marshal.FreeCoTaskMem(ptrStat);
Marshal.FreeCoTaskMem(ptrErr);
return(arrStat);
//if (hresult == HRESULTS.S_OK)
//{
// return arrStat;
//}
//else
//{
// return null;
//}
}