/// <summary>
/// Populates the tree with the event categories supported by the server.
/// </summary>
private void ShowEventCategories(TreeNodeCollection nodes, TsCAeEventType eventType)
{
Technosoftware.DaAeHdaClient.Ae.TsCAeCategory[] categories = null;
// fetch categories.
try
{
categories = mServer_.QueryEventCategories((int)eventType);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
return;
}
// check for trivial case.
if (categories.Length == 0)
{
return;
}
// create event type node.
TreeNode root = new TreeNode(eventType.ToString())
{
ImageIndex = Resources.IMAGE_OPEN_YELLOW_FOLDER,
SelectedImageIndex = Resources.IMAGE_CLOSED_YELLOW_FOLDER,
Tag = eventType
};
nodes.Add(root);
// add categories to tree.
foreach (Technosoftware.DaAeHdaClient.Ae.TsCAeCategory category in categories)
{
// create node.
TreeNode node = new TreeNode(category.Name)
{
ImageIndex = Resources.IMAGE_ENVELOPE,
SelectedImageIndex = Resources.IMAGE_ENVELOPE,
Tag = category
};
// add dummy child to ensure '+' sign is visible.
node.Nodes.Add(new TreeNode());
// add to tree.
root.Nodes.Add(node);
}
}
/// <summary>
/// Populates the list box with the categories.
/// </summary>
private void FetchCategories(TsCAeServer server, TsCAeEventType eventType)
{
OpcClientSdk.Ae.TsCAeCategory[] categories = server.QueryEventCategories((int)eventType);
foreach (OpcClientSdk.Ae.TsCAeCategory category in categories)
{
ListViewItem item = new ListViewItem(category.ID.ToString());
item.SubItems.Add(category.Name);
item.SubItems.Add(eventType.ToString());
item.Tag = category;
CategoriesLV.Items.Add(item);
}
}
/// <summary>
/// Populates the list box with the categories.
/// </summary>
private void FetchCategories(TsCAeServer server, TsCAeEventType eventType)
{
Technosoftware.DaAeHdaClient.Ae.TsCAeCategory[] categories = server.QueryEventCategories((int)eventType);
foreach (Technosoftware.DaAeHdaClient.Ae.TsCAeCategory category in categories)
{
ListViewItem item = new ListViewItem(category.ID.ToString());
item.SubItems.Add(category.Name);
item.SubItems.Add(eventType.ToString());
item.Tag = category;
categoriesLv_.Items.Add(item);
}
}
/// <summary>
/// Populates the tree with the event categories supported by the server.
/// </summary>
private void BrowseEvents(TreeNodeCollection nodes, TsCAeEventType eventType)
{
// fetch categories.
Technosoftware.DaAeHdaClient.Ae.TsCAeCategory[] categories = mServer_.QueryEventCategories((int)eventType);
if (categories.Length == 0)
{
return;
}
// create event type node.
TreeNode root = new TreeNode(eventType.ToString())
{
ImageIndex = Resources.IMAGE_OPEN_YELLOW_FOLDER,
SelectedImageIndex = Resources.IMAGE_CLOSED_YELLOW_FOLDER,
Tag = eventType
};
nodes.Add(root);
// add categories to tree.
foreach (Technosoftware.DaAeHdaClient.Ae.TsCAeCategory category in categories)
{
// create node.
TreeNode node = new TreeNode(category.Name)
{
ImageIndex = Resources.IMAGE_ENVELOPE,
SelectedImageIndex = Resources.IMAGE_ENVELOPE,
Tag = category
};
// add dummy child to ensure '+' sign is visible.
if (eventType == TsCAeEventType.Condition)
{
node.Nodes.Add(new TreeNode());
}
// add to tree.
root.Nodes.Add(node);
}
}
/// <summary>
/// Displays the categories for the specified event type.
/// </summary>
private void ShowAvailableCategories(TsCAeEventType eventType)
{
try
{
Technosoftware.DaAeHdaClient.Ae.TsCAeCategory[] categories = mServer_.QueryEventCategories((int)eventType);
foreach (Technosoftware.DaAeHdaClient.Ae.TsCAeCategory category in categories)
{
ListViewItem item = new ListViewItem(category.Name);
item.SubItems.Add(eventType.ToString());
item.Tag = category;
categoriesLv_.Items.Add(item);
}
}
catch
{
// ignore errors.
}
}
/// <summary>
/// Displays the categories for the specified event type.
/// </summary>
private void ShowAvailableCategories(TsCAeEventType eventType)
{
try
{
OpcClientSdk.Ae.TsCAeCategory[] categories = m_server.QueryEventCategories((int)eventType);
foreach (OpcClientSdk.Ae.TsCAeCategory category in categories)
{
ListViewItem item = new ListViewItem(category.Name);
item.SubItems.Add(eventType.ToString());
item.Tag = category;
CategoriesLV.Items.Add(item);
}
}
catch
{
// ignore errors.
}
}
/// <summary>
/// Find attributes for condition by searching all categories.
/// </summary>
private void FindAttributes()
{
try
{
Technosoftware.DaAeHdaClient.Ae.TsCAeCategory[] categories = mServer_.QueryEventCategories((int)TsCAeEventType.Condition);
for (int ii = 0; ii < categories.Length; ii++)
{
// fetch conditions for category.
string[] conditions = mServer_.QueryConditionNames(categories[ii].ID);
// check if this is the category containing the current condition.
bool found = false;
for (int jj = 0; jj < conditions.Length; jj++)
{
if (conditions[jj] == mCondition_)
{
mCategoryId_ = categories[ii].ID;
found = true;
break;
}
}
// fetch the attributes when found.
if (found)
{
mAttributes_ = mServer_.QueryEventAttributes(categories[ii].ID);
break;
}
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
return;
}
}
/// <summary>
/// Displays the event conditions supported by the server.
/// </summary>
public void ShowDialog(TsCAeServer server)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
// clear tree view.
ConditionsTV.Nodes.Clear();
// fetch and populate conditions and sub-conditions.
try
{
TreeNode root = new TreeNode("Categories");
root.ImageIndex = Resources.IMAGE_CLOSED_YELLOW_FOLDER;
root.SelectedImageIndex = Resources.IMAGE_OPEN_YELLOW_FOLDER;
ConditionsTV.Nodes.Add(root);
root.Expand();
// add categories.
OpcClientSdk.Ae.TsCAeCategory[] categories = server.QueryEventCategories((int)TsCAeEventType.Condition);
foreach (OpcClientSdk.Ae.TsCAeCategory category in categories)
{
TreeNode node = new TreeNode(category.Name);
node.ImageIndex = Resources.IMAGE_LIST_BOX;
node.SelectedImageIndex = Resources.IMAGE_LIST_BOX;
node.Tag = category;
// add conditions.
TreeNode folder = new TreeNode("Conditions");
folder.ImageIndex = Resources.IMAGE_CLOSED_YELLOW_FOLDER;
folder.SelectedImageIndex = Resources.IMAGE_OPEN_YELLOW_FOLDER;
node.Nodes.Add(folder);
FetchConditions(folder, server, category.ID);
// add attributes.
folder = new TreeNode("Attributes");
folder.ImageIndex = Resources.IMAGE_CLOSED_YELLOW_FOLDER;
folder.SelectedImageIndex = Resources.IMAGE_OPEN_YELLOW_FOLDER;
node.Nodes.Add(folder);
FetchAttributes(folder, server, category.ID);
// add category to tree.
root.Nodes.Add(node);
}
}
catch (Exception e)
{
MessageBox.Show(e.Message, this.Text);
}
// show dialog.
ShowDialog();
}
public void Run()
{
try
{
const string serverUrl = "opcae://localhost/Technosoftware.AeSample";
Console.WriteLine();
Console.WriteLine("Simple OPC AE Client based on the OPC AE Client SDK .NET Standard");
Console.WriteLine("-----------------------------------------------------------------");
Console.Write(" Press <Enter> to connect to "); Console.WriteLine(serverUrl);
Console.ReadLine();
Console.WriteLine(" Please wait...");
TsCAeServer myAeServer = new TsCAeServer();
// Connect to the server
myAeServer.Connect(serverUrl);
Console.WriteLine(" Connected, press <Enter> to create an active subscription and press <Enter>");
Console.WriteLine(" again to deactivate the subscription. This stops the reception of new events.");
Console.ReadLine();
TsCAeSubscriptionState state = new TsCAeSubscriptionState {
Active = true, BufferTime = 0, MaxSize = 0, ClientHandle = 100, Name = "Simple Event Subscription"
};
TsCAeCategory[] categories = myAeServer.QueryEventCategories((int)TsCAeEventType.Condition);
TsCAeAttribute[] attributes = null;
attributes = myAeServer.QueryEventAttributes(categories[0].ID);
int[] attributeIDs = new int[2];
attributeIDs[0] = attributes[0].ID;
attributeIDs[1] = attributes[1].ID;
TsCAeSubscription subscription;
subscription = (TsCAeSubscription)myAeServer.CreateSubscription(state);
subscription.DataChangedEvent += OnDataChangedEvent;
subscription.SelectReturnedAttributes(categories[0].ID, attributeIDs);
Console.ReadLine();
subscription.DataChangedEvent -= OnDataChangedEvent;
Console.WriteLine(" Subscription deactivated, press <Enter> to remove the subscription and disconnect from the server.");
subscription.Dispose(); // Remove subscription
myAeServer.Disconnect(); // Disconnect from server
myAeServer.Dispose(); // Dispose server object
Console.ReadLine();
Console.WriteLine(" Disconnected from the server.");
Console.WriteLine();
}
catch (OpcResultException e)
{
Console.WriteLine(String.Format(" {0}", e.Message));
Console.ReadLine();
return;
}
catch (Exception e)
{
Console.WriteLine(String.Format(" {0}", e.Message));
Console.ReadLine();
return;
}
}