public OpcForm(OutProc anOutProc)
{
InitializeComponent();
try
{
m_outProc = anOutProc;
m_opcClient = m_outProc.OpcClient;
m_session = m_opcClient.GetSession();
m_executionOptions = m_opcClient.GetExecutionOptions();
//create the browse tree root element
TreeNode treeRoot = new TreeNode(m_session.Url, 0, 0);
DaAddressSpaceElement rootDaAddressSpaceElement = new DaAddressSpaceElement(EnumAddressSpaceElementType.BRANCH, String.Empty, string.Empty, string.Empty, 0, null);
rootDaAddressSpaceElement.Session = m_session;
treeRoot.Tag = rootDaAddressSpaceElement;
itemsTreeView.Nodes.Add(treeRoot);
DaAddressSpaceElement[] addressSpaceElements = null;
#region Browse branches
//---------------------
DaAddressSpaceElementBrowseOptions browseOptions = new DaAddressSpaceElementBrowseOptions();
browseOptions.ElementTypeFilter = EnumAddressSpaceElementType.BRANCH;
//get the root's children
if (ResultCode.SUCCEEDED(m_session.Browse(
((DaAddressSpaceElement)treeRoot.Tag).ItemId,
((DaAddressSpaceElement)treeRoot.Tag).ItemPath,
browseOptions,
out addressSpaceElements,
m_executionOptions)))
{
if (addressSpaceElements != null)
{
for (int i = 0; i < addressSpaceElements.Length; i++)
{
TreeNode node = new TreeNode(addressSpaceElements[i].Name, 1, 1);
node.Tag = addressSpaceElements[i];
treeRoot.Nodes.Add(node);
} //end for
}
} //end if
//-
#endregion
addressSpaceElements = null;
#region Browse Leaves
//-------------------
browseOptions.ElementTypeFilter = EnumAddressSpaceElementType.LEAF;
//get the root's children
if (ResultCode.SUCCEEDED(m_session.Browse(
((DaAddressSpaceElement)treeRoot.Tag).ItemId,
((DaAddressSpaceElement)treeRoot.Tag).ItemPath,
browseOptions,
out addressSpaceElements,
m_executionOptions)))
{
if (addressSpaceElements != null)
{
for (int i = 0; i < addressSpaceElements.Length; i++)
{
TreeNode node = new TreeNode(addressSpaceElements[i].Name, 2, 2);
node.Tag = addressSpaceElements[i];
treeRoot.Nodes.Add(node);
} //end for
} // end if
} //end if
//-
#endregion
#region GetDaProperties
//---------------------
DaProperty[] daProperties = null;
m_propertyGetOptions.WhatPropertyData = EnumPropertyData.ALL;
if (ResultCode.SUCCEEDED(rootDaAddressSpaceElement.GetDaProperties(
m_propertyGetOptions,
out daProperties,
m_executionOptions)))
{
if (daProperties != null)
{
for (int i = 0; i < daProperties.Length; i++)
{
TreeNode node = new TreeNode(daProperties[i].Name, 3, 3);
//add all properties except OPC-specific properties
if (daProperties[i].Id >= 100)
{
treeRoot.Nodes.Add(node);
}
} //end for
}
} // end if
//-
#endregion
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString());
} // end try...catch
} // end constructor
} // end Main
private void TreeViewBeforeExpand(object sender, System.Windows.Forms.TreeViewCancelEventArgs e)
{
try
{
itemsTreeView.Cursor = System.Windows.Forms.Cursors.WaitCursor;
foreach (TreeNode node in e.Node.Nodes)
{
m_propertyGetOptions.WhatPropertyData = EnumPropertyData.ALL;
DaAddressSpaceElement[] addressSpaceElements = null;
node.Nodes.Clear();
if (node.Tag is DaAddressSpaceElement)
{
DaAddressSpaceElement element = node.Tag as DaAddressSpaceElement;
DaAddressSpaceElementBrowseOptions browseOptions = new DaAddressSpaceElementBrowseOptions();
#region Branches
//-----------
if (m_session.isConnected())
{
browseOptions.ElementTypeFilter = EnumAddressSpaceElementType.BRANCH;
if (ResultCode.SUCCEEDED(m_session.Browse(
element.ItemId,
element.ItemPath,
browseOptions,
out addressSpaceElements,
m_executionOptions)))
{
if (addressSpaceElements != null)
{
for (int i = 0; i < addressSpaceElements.Length; i++)
{
TreeNode newNode = new TreeNode(addressSpaceElements[i].Name, 1, 1);
newNode.Tag = addressSpaceElements[i];
node.Nodes.Add(newNode);
} //end for
}
} //end if
} //end if
//-
#endregion
addressSpaceElements = null;
#region Leaves
//-----------
if (m_session.isConnected())
{
browseOptions.ElementTypeFilter = EnumAddressSpaceElementType.LEAF;
if (ResultCode.SUCCEEDED(m_session.Browse(
element.ItemId,
element.ItemPath,
browseOptions,
out addressSpaceElements,
m_executionOptions)))
{
if (addressSpaceElements != null)
{
for (int i = 0; i < addressSpaceElements.Length; i++)
{
TreeNode newNode = new TreeNode(addressSpaceElements[i].Name, 2, 2);
newNode.Tag = addressSpaceElements[i];
node.Nodes.Add(newNode);
} //end for
}
} //end if
} //end if
//-
#endregion
DaProperty[] daProperties = null;
#region Properties
//----------------
if (m_session.isConnected())
{
if (ResultCode.SUCCEEDED(element.GetDaProperties(
m_propertyGetOptions,
out daProperties,
m_executionOptions)))
{
if (daProperties != null)
{
for (int i = 0; i < daProperties.Length; i++)
{
//add all properties except OPC-specific properties
if (daProperties[i].Id >= 100)
{
TreeNode newNode = new TreeNode(daProperties[i].Description, 3, 3);
node.Nodes.Add(newNode);
}
} //end for
}
} // end if
} //end if
//-
#endregion
} // end if
node.Collapse();
} // end if
itemsTreeView.Cursor = System.Windows.Forms.Cursors.Default;
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString());
}
} // end treeview_beforeexpand