/// <summary>
/// Invokes callback for a read attributes request.
/// </summary>
private bool InvokeCallback(ReadAttributesEventHandler callback, object results)
{
// check for valid result type.
if (!typeof(ItemAttributeCollection).IsInstanceOfType(results))
{
return(false);
}
ItemAttributeCollection values = (ItemAttributeCollection)results;
// update item handles and actual times.
UpdateResults(new ItemAttributeCollection[] { values });
try
{
callback(this, values);
}
catch
{
// ignore exceptions in the callbacks.
}
// request always completes
return(true);
}
public void OnReadAttributeComplete(int dwTransactionID, int hrStatus, int hClient, int dwNumItems, OPCHDA_ATTRIBUTE[] pAttributeValues, int[] phrErrors)
{
try
{
lock (this)
{
Request request = (Request)this.m_requests[dwTransactionID];
if (request != null)
{
ItemAttributeCollection results = new ItemAttributeCollection {
ServerHandle = hClient
};
AttributeValueCollection[] valuesArray = new AttributeValueCollection[pAttributeValues.Length];
for (int i = 0; i < pAttributeValues.Length; i++)
{
valuesArray[i] = OpcCom.Hda.Interop.GetAttributeValueCollection(pAttributeValues[i], false);
valuesArray[i].ResultID = OpcCom.Interop.GetResultID(phrErrors[i]);
results.Add(valuesArray[i]);
}
if (request.InvokeCallback(results))
{
this.m_requests.Remove(request.RequestID);
}
}
}
}
catch (Exception exception)
{
this.HandleException(dwTransactionID, exception);
}
}
public void OnReadAttributeComplete(int dwTransactionID, int hrStatus, int hClient, int dwNumItems, OPCHDA_ATTRIBUTE[] pAttributeValues, int[] phrErrors)
{
try
{
lock (this)
{
Request request = (Request)m_requests[dwTransactionID];
if (request != null)
{
ItemAttributeCollection itemAttributeCollection = new ItemAttributeCollection();
itemAttributeCollection.ServerHandle = hClient;
AttributeValueCollection[] array = new AttributeValueCollection[pAttributeValues.Length];
for (int i = 0; i < pAttributeValues.Length; i++)
{
array[i] = Interop.GetAttributeValueCollection(pAttributeValues[i], deallocate: false);
array[i].ResultID = OpcCom.Interop.GetResultID(phrErrors[i]);
itemAttributeCollection.Add(array[i]);
}
if (request.InvokeCallback(itemAttributeCollection))
{
m_requests.Remove(request.RequestID);
}
}
}
}
catch (Exception exception)
{
HandleException(dwTransactionID, exception);
}
}
public static ItemAttributeCollection GetbyItem(string ItemCode)
{
ItemAttributeCollection collection = new ItemAttributeCollection();
ItemAttribute obj;
using (var reader = SqlHelper.ExecuteReader("tblItemAttribute_GetAll_byItem", new SqlParameter("@ItemCode", ItemCode)))
{
while (reader.Read())
{
obj = GetItemFromReader(reader);
collection.Add(obj);
}
}
return(collection);
}
public static ItemAttributeCollection GetAllItem()
{
ItemAttributeCollection collection = new ItemAttributeCollection();
using (var reader = SqlHelper.ExecuteReader("tblItemAttribute_GetAll", null))
{
while (reader.Read())
{
ItemAttribute obj = new ItemAttribute();
obj = GetItemFromReader(reader);
collection.Add(obj);
}
}
return(collection);
}
/// <summary>
/// Called when an asynchronous read attributes request completes.
/// </summary>
public void OnReadAttributeComplete(
int dwTransactionID,
int hrStatus,
int hClient,
int dwNumItems,
OPCHDA_ATTRIBUTE[] pAttributeValues,
int[] phrErrors)
{
try
{
lock (this)
{
// lookup request transaction.
Request request = (Request)m_requests[dwTransactionID];
if (request == null)
{
return;
}
// create item object to collect results.
ItemAttributeCollection item = new ItemAttributeCollection();
item.ServerHandle = hClient;
// unmarshal results.
AttributeValueCollection[] results = new AttributeValueCollection[pAttributeValues.Length];
for (int ii = 0; ii < pAttributeValues.Length; ii++)
{
results[ii] = Interop.GetAttributeValueCollection(pAttributeValues[ii], false);
results[ii].ResultID = OpcCom.Interop.GetResultID(phrErrors[ii]);
item.Add(results[ii]);
}
// invoke callback - remove request if all results arrived.
if (request.InvokeCallback(item))
{
m_requests.Remove(request.RequestID);
}
}
}
catch (Exception exception)
{
HandleException(dwTransactionID, exception);
}
}
private bool InvokeCallback(ReadAttributesEventHandler callback, object results)
{
if (!typeof(ItemAttributeCollection).IsInstanceOfType(results))
{
return(false);
}
ItemAttributeCollection attributes = (ItemAttributeCollection)results;
this.UpdateResults(new ItemAttributeCollection[] { attributes });
try
{
callback(this, attributes);
}
catch
{
}
return(true);
}
