/// <summary>
/// Adds a set of items to a subscription.
/// </summary>
private void DoAddItems()
{
try
{
// assign globally unique client handle.
TsCDaItem[] items = ItemsCTRL.GetItems();
foreach (TsCDaItem item in items)
{
item.ClientHandle = Guid.NewGuid().ToString();
}
// add items to subscription.
m_items = m_subscription.AddItems(items);
// move to add items panel.
BackBTN.Enabled = true;
NextBTN.Enabled = false;
CancelBTN.Visible = false;
DoneBTN.Visible = true;
OptionsBTN.Visible = false;
SubscriptionCTRL.Visible = true;
BrowseCTRL.Visible = false;
ItemsCTRL.Visible = false;
ResultsCTRL.Visible = true;
// update controls with actual values.
SubscriptionCTRL.Set(m_subscription.State);
ResultsCTRL.Initialize(m_server, null, m_items);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
/// <summary>
/// Adds a set of items to a subscription.
/// </summary>
private void DoAddItems()
{
try
{
// assign globally unique client handle.
TsCDaItem[] items = itemsCtrl_.GetItems();
foreach (TsCDaItem item in items)
{
item.ClientHandle = Guid.NewGuid().ToString();
}
// add items to subscription.
mItems_ = mSubscription_.AddItems(items);
// move to add items panel.
backBtn_.Enabled = true;
nextBtn_.Enabled = false;
cancelBtn_.Visible = false;
doneBtn_.Visible = true;
optionsBtn_.Visible = false;
browseCtrl_.Visible = true;
itemsCtrl_.Visible = false;
resultsCtrl_.Visible = true;
// update controls with actual values.
resultsCtrl_.Initialize(mServer_, null, mItems_);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
/// <summary>
/// Edits items in the specified subscription.
/// </summary>
private void EditItem(TreeNode node, TsCDaSubscription subscription, TsCDaItem item)
{
try
{
// save existing item id.
OpcItem itemId = new OpcItem(item);
TsCDaItem[] items = new ItemListEditDlg().ShowDialog(new TsCDaItem[] { item }, false, false);
if (items == null)
{
return;
}
// modify an existing item.
if (itemId.Key == items[0].Key)
{
subscription.ModifyItems((int)TsCDaStateMask.All, items);
}
// add/remove item because the item id changed.
else
{
items = subscription.AddItems(items);
subscription.RemoveItems(new OpcItem[] { itemId });
}
node.Text = items[0].ItemName;
node.Tag = items[0];
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
/// <summary>
/// Set things in motion so your service can do its work.
/// </summary>
protected override void OnStart(string[] args)
{
const string serverName = "opcda://localhost/Technosoftware.DaSample";
try
{
myDaServer = new TsCDaServer();
myDaServer.Connect(serverName);
OpcServerStatus status = myDaServer.GetServerStatus();
// Add a group with default values Active = true and UpdateRate = 500ms
TsCDaSubscriptionState groupState = new TsCDaSubscriptionState();
groupState.Name = "MyGroup"; // Group Name
group = (TsCDaSubscription)myDaServer.CreateSubscription(groupState);
// Add Items
TsCDaItem[] items = new TsCDaItem[3];
TsCDaItemResult[] itemResults;
items[0] = new TsCDaItem();
items[0].ItemName = "SimulatedData.Ramp"; // Item Name
items[0].ClientHandle = 100; // Client Handle
items[0].MaxAgeSpecified = true;
items[0].MaxAge = Int32.MaxValue;
items[1] = new TsCDaItem();
items[1].ItemName = "SimulatedData.Random"; // Item Name
items[1].ClientHandle = 150; // Client Handle
items[2] = new TsCDaItem();
items[2].ItemName = "InOut_I4"; // Item Name
items[2].ClientHandle = 200; // Client Handle
TsCDaItem[] arAddedItems;
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");
}
}
arAddedItems = itemResults;
group.DataChangedEvent += new TsCDaDataChangedEventHandler(DataChangeHandler);
Console.WriteLine("Wait 5 seconds ...");
//System.Threading.Thread.Sleep(5000);
}
catch (OpcResultException e)
{
Console.WriteLine(" " + e.Message);
return;
}
catch (Exception e)
{
Console.WriteLine(" " + e.Message);
return;
}
}
//----------------------------------------------------------------------------------------------------------------------
// btnAddItem_Click
//--------------------
// This method tries to add the specified item to the preceding added group object.
//----------------------------------------------------------------------------------------------------------------------
private void btnAddItem_Click(object sender, System.EventArgs e)
{
try
{
TsCDaSubscriptionState groupState = new TsCDaSubscriptionState();
groupState.Name = "MyGroup"; // Group Name
m_pOpcGroup = (TsCDaSubscription)m_OpcDaServer.CreateSubscription(groupState);
TsCDaItemResult[] res;
TsCDaItem[] items = new TsCDaItem[1];
items[0] = new TsCDaItem();
items[0].ItemName = txtboxOpcItem.Text; // Item Name
items[0].ClientHandle = 100; // Client Handle
res = m_pOpcGroup.AddItems(items);
if (res[0].Result.IsSuccess())
{
if (!(res[0].Result.IsOk())) // Note: Since this sample adds only one item it's required that AddItems()
{
return; // succeeds for all specified items (in this case only one).
}
else
{
m_arAddedItems = res;
}
}
else
{
MessageBox.Show("AddItems() method failed: " + res[0].Result.Description(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
/// All succeeded, update buttons and text fields
txtboxOpcItem.Enabled = false;
btnAddItem.Enabled = false;
btnRead.Enabled = true;
btnWrite.Enabled = true;
txtboxWrite.Enabled = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
//----------------------------------------------------------------------------------------------------------------------
// btnAddItem_Click
//--------------------
// This method tries to add the specified item to the preceding added group object.
//----------------------------------------------------------------------------------------------------------------------
private void btnAddItem_Click(object sender, System.EventArgs e)
{
try
{
TsCDaSubscriptionState groupState = new TsCDaSubscriptionState();
groupState.Name = "MyGroup"; // Group Name
groupState.ClientHandle = "test";
groupState.Deadband = 0;
groupState.UpdateRate = 1000;
groupState.KeepAlive = 10000;
m_pOpcGroup = (TsCDaSubscription)m_OpcDaServer.CreateSubscription(groupState);
TsCDaItemResult[] itemResults;
TsCDaItem[] items = new TsCDaItem[1];
items[0] = new TsCDaItem();
items[0].ItemName = txtboxOpcItem.Text; // Item Name
items[0].ClientHandle = 100; // Client Handle
itemResults = m_pOpcGroup.AddItems(items);
m_arAddedItems = itemResults;
/// Activate data change subscription
m_pOpcGroup.DataChangedEvent += new TsCDaDataChangedEventHandler(DataChangeHandler);
/// All succeeded, update buttons and text fields
txtboxOpcItem.Enabled = false;
btnAddItem.Enabled = false;
btnRead.Enabled = true;
btnRefresh.Enabled = true;
btnCancel.Enabled = true;
btnWrite.Enabled = true;
txtboxWrite.Enabled = true;
chboxNotifications.Enabled = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
/// <summary>
/// Edits items in the specified subscription.
/// </summary>
private void EditItems(TreeNode node, TsCDaSubscription subscription)
{
try
{
// save item ids to detect item id changes.
OpcItem[] itemIDs = new OpcItem[subscription.Items.Length];
for (int ii = 0; ii < itemIDs.Length; ii++)
{
itemIDs[ii] = new OpcItem(subscription.Items[ii]);
}
// edit the items.
TsCDaItem[] items = new ItemListEditDlg().ShowDialog(subscription.Items, false, false);
if (items == null)
{
return;
}
// separate the items in lists depending on whether item id changed.
ArrayList insertItems = new ArrayList();
ArrayList updateItems = new ArrayList();
ArrayList deleteItems = new ArrayList();
for (int ii = 0; ii < itemIDs.Length; ii++)
{
if (items[ii].Key != itemIDs[ii].Key)
{
insertItems.Add(items[ii]);
deleteItems.Add(itemIDs[ii]);
}
else
{
updateItems.Add(items[ii]);
}
}
// update existing items.
if (updateItems.Count > 0)
{
subscription.ModifyItems((int)TsCDaStateMask.All, (TsCDaItem[])updateItems.ToArray(typeof(TsCDaItem)));
}
// insert new items.
if (insertItems.Count > 0)
{
subscription.AddItems((TsCDaItem[])insertItems.ToArray(typeof(TsCDaItem)));
}
// delete old items.
if (deleteItems.Count > 0)
{
subscription.RemoveItems((OpcItem[])deleteItems.ToArray(typeof(OpcItem)));
}
// update tree.
node.Nodes.Clear();
foreach (TsCDaItem item in subscription.Items)
{
AddItem(node, item);
}
node.Expand();
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
void OnCreateSubscription()
{
// Создаём объект подписки
var subscriptionState = new TsCDaSubscriptionState
{
Name = "MySubscription",
ClientHandle = "MySubscriptionId",
Deadband = 0,
UpdateRate = 1000,
KeepAlive = 10000
};
_activeSubscription = (TsCDaSubscription)_activeOpcServer.CreateSubscription(subscriptionState);
// Добавляем в объект подписки выбранные теги
var x = 0;
List<TsCDaItem> list = new List<TsCDaItem>();
foreach (var item in CheckedTags)
{
var tag = new TsCDaItem
{
ItemName = item.Element.ItemName,
ClientHandle = 100 + x // Уникальный Id определяемый пользователем
};
list.Add(tag);
++x;
}
// Добавляем теги и проверяем результат данной операции
var results = _activeSubscription.AddItems(list.ToArray());
var errors = results.Where(result => result.Result.IsError());
if (errors.Count() > 0)
{
StringBuilder msg = new StringBuilder();
msg.Append("Не удалось добавить теги для подписки. Возникли ошибки в тегах:");
foreach (var error in errors)
{
msg.Append(String.Format("ItemName={0} ClientHandle={1} Description={2}; ",
error.ItemName, error.ClientHandle, error.Result.Description()));
}
throw new InvalidOperationException(msg.ToString());
}
_activeSubscription.DataChangedEvent += _dataChangeEventHandler;
}