/// <summary>
/// Executes a read request for the current set if items.
/// </summary>
public void DoRead()
{
try
{
// read from server.
TsCDaItem[] items = ItemsCTRL.GetItems();
TsCDaItemValueResult[] results = null;
if (m_subscription != null)
{
if (m_synchronous)
{
results = m_subscription.Read(items);
}
else
{
results = new AsyncRequestDlg().ShowDialog(m_subscription, items);
if (results == null)
{
return;
}
}
}
else
{
// add dummy client handles to test that they get returned properly.
foreach (TsCDaItem item in items)
{
item.ClientHandle = item.ItemName;
}
results = m_server.Read(items);
}
// save results.
m_values = results;
BackBTN.Enabled = true;
NextBTN.Enabled = false;
CancelBTN.Visible = false;
DoneBTN.Visible = true;
OptionsBTN.Visible = false;
ItemsCTRL.Visible = false;
ResultsCTRL.Visible = true;
// display results.
ResultsCTRL.Initialize(m_server, (m_subscription != null)?m_subscription.Locale:m_server.Locale, results);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
/// <summary>
/// Executes a read request for the current set if items.
/// </summary>
public void DoRead()
{
try
{
// read from server.
TsCDaItem[] items = itemsCtrl_.GetItems();
TsCDaItemValueResult[] results = null;
if (mSubscription_ != null)
{
if (mSynchronous_)
{
results = mSubscription_.Read(items);
}
else
{
results = new AsyncRequestDlg().ShowDialog(mSubscription_, items);
if (results == null)
{
return;
}
}
}
else
{
// add dummy client handles to test that they get returned properly.
foreach (TsCDaItem item in items)
{
item.ClientHandle = item.ItemName;
}
results = mServer_.Read(items);
}
// save results.
mValues_ = results;
backBtn_.Enabled = true;
nextBtn_.Enabled = false;
cancelBtn_.Visible = false;
doneBtn_.Visible = true;
optionsBtn_.Visible = false;
itemsCtrl_.Visible = false;
resultsCtrl_.Visible = true;
// display results.
resultsCtrl_.Initialize(mServer_, (mSubscription_ != null)?mSubscription_.Locale:mServer_.Locale, results);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
public void Run()
{
try
{
const string serverUrl = "opcda://localhost/Technosoftware.DaSample";
Console.WriteLine();
Console.WriteLine("Simple OPC DA Client based on the OPC DA/AE/HDA Client SDK .NET Standard");
Console.WriteLine("------------------------------------------------------------------------");
Console.Write(" Press <Enter> to connect to "); Console.WriteLine(serverUrl);
Console.ReadLine();
Console.WriteLine(" Please wait...");
TsCDaServer myDaServer = new TsCDaServer();
// Connect to the server
myDaServer.Connect(serverUrl);
// Get the status from the server
OpcServerStatus status = myDaServer.GetServerStatus();
Console.WriteLine($" Status of Server is {status.ServerState}");
Console.WriteLine(" Connected, press <Enter> to create an active group object and add several items.");
Console.ReadLine();
// Add a group with default values Active = true and UpdateRate = 500ms
TsCDaSubscriptionState groupState = new TsCDaSubscriptionState {
Name = "MyGroup" /* Group Name*/
};
var group = (TsCDaSubscription)myDaServer.CreateSubscription(groupState);
// Add Items
TsCDaItem[] items = new TsCDaItem[4];
items[0] = new TsCDaItem
{
ItemName = "SimulatedData.Ramp",
ClientHandle = 100,
MaxAgeSpecified = true,
MaxAge = 0,
Active = true,
ActiveSpecified = true
};
// Item Name
// Client Handle
// Read from Cache
items[1] = new TsCDaItem
{
ItemName = "CTT.SimpleTypes.InOut.Integer",
ClientHandle = 150,
Active = true,
ActiveSpecified = true
};
// Item Name
// Client Handle
items[2] = new TsCDaItem
{
ItemName = "CTT.SimpleTypes.InOut.Short",
ClientHandle = 200,
Active = false,
ActiveSpecified = true
};
// Item Name
// Client Handle
items[3] = new TsCDaItem
{
ItemName = "CTT.Arrays.InOut.Word[]", ClientHandle = 250, Active = false, ActiveSpecified = true
};
// Item Name
// Client Handle
// Synchronous Read with server read function (DA 3.0) without a group
TsCDaItemValueResult[] itemValues = myDaServer.Read(items);
for (int i = 0; i < itemValues.GetLength(0); i++)
{
if (itemValues[i].Result.IsError())
{
Console.WriteLine($" Item {itemValues[i].ItemName} could not be read");
}
}
var itemResults = group.AddItems(items);
for (int i = 0; i < itemResults.GetLength(0); i++)
{
if (itemResults[i].Result.IsError())
{
Console.WriteLine($" Item {itemResults[i].ItemName} could not be added to the group");
}
}
Console.WriteLine("");
Console.WriteLine(" Group and items added, press <Enter> to create a data change subscription");
Console.WriteLine(" and press <Enter> again to deactivate the data change subscription.");
Console.WriteLine(" This stops the reception of data change notifications.");
Console.ReadLine();
group.DataChangedEvent += OnDataChangeEvent;
Console.ReadLine();
// Set group inactive
groupState.Active = false;
group.ModifyState((int)TsCDaStateMask.Active, groupState);
Console.WriteLine(" Data change subscription deactivated, press <Enter> to remove all");
Console.WriteLine(" and disconnect from the server.");
group.Dispose();
myDaServer.Disconnect();
myDaServer.Dispose();
Console.ReadLine();
Console.WriteLine(" Disconnected from the server.");
Console.WriteLine();
}
catch (OpcResultException e)
{
Console.WriteLine(" " + e.Message);
Console.ReadLine();
}
catch (Exception e)
{
Console.WriteLine(" " + e.Message);
Console.ReadLine();
}
}