/// <summary>
/// Displays the dialog.
/// </summary>
/// <param name="server">The server instance.</param>
/// <param name="itemCollection">The <see cref="System.EventArgs"/> Collection of items to display.</param>
public void Show(Session server, List <NodeId> lstNodeIds)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
// Set server,
m_Session = server;
// Add the items to the listview.
foreach (NodeId node in lstNodeIds)
{
// build WriteValueInfo
WriteValueInfo info = new WriteValueInfo();
info.NodeId = node;
// Create ListViewItem
ListViewItem item = new ListViewItem("");
// add subitems for nodeId and value
item.SubItems.Add(node.ToString());
item.SubItems.Add("");
// Set tag on ListViewItem
item.Tag = info;
// add item to listview
this.listView.Items.Add(item);
}
// Fit the width of the columns to header size.
this.listView.Columns[0].Width = -2;
this.listView.Columns[1].Width = -2;
this.listView.Columns[2].Width = -2;
// Read the attributes
ReadAttributes();
// read values
UpdateCurrentValues();
// Display the control,
Show();
// and bring it to front.
BringToFront();
}
/// <summary>
/// Reads and displays the new values.
/// </summary>
private void ReadAttributes()
{
// Prepare call to ClientAPI.
int i = 0;
foreach (ListViewItem item in this.listView.Items)
{
ReadValueIdCollection nodesToRead = new ReadValueIdCollection();
WriteValueInfo info = item.Tag as WriteValueInfo;
// DataType
nodesToRead.Add(new ReadValueId()
{
NodeId = info.NodeId,
AttributeId = Attributes.DataType
});
// ValueRank
nodesToRead.Add(new ReadValueId()
{
NodeId = info.NodeId,
AttributeId = Attributes.ValueRank
});
// ArrayDimension
nodesToRead.Add(new ReadValueId()
{
NodeId = info.NodeId,
AttributeId = Attributes.ArrayDimensions
});
// Call to ClientAPI.
List <DataValue> readResults = new List <DataValue>();
try
{
readResults = m_Session.Read(
nodesToRead,
0,
TimestampsToReturn.Both,
null);
if (StatusCode.IsGood(readResults[0].StatusCode) && StatusCode.IsGood(readResults[1].StatusCode))
{
// datatype
info.DataType = TypeUtils.GetBuiltInType((NodeId)readResults[0].Value, m_Session.Cache);
// value rank
info.ValueRank = (int)readResults[1].Value;
// array dimension
if (info.ValueRank == ValueRanks.Scalar)
{
info.ArrayDimensions = null;
info.AttributesRead = true;
}
else if (info.ValueRank == ValueRanks.OneDimension)
{
info.ArrayDimensions = readResults[1].Value as List <uint>;
info.AttributesRead = true;
}
// can't handle
else
{
info.Error = true;
}
}
else
{
info.Error = true;
}
// Update status label.
lblStatus.Text = "Reading attributes succeeded.";
}
catch (Exception e)
{
// Update status label.
lblStatus.Text = "An exception occured while reading attributes: "
+ e.Message;
}
i++;
}
}
/// <summary>
/// Writes the values.
/// </summary>
private void WriteValues()
{
try
{
// Prepare call to ClientAPI.
List <WriteValue> nodesToWrite = new List <WriteValue>();
List <StatusCode> results = null;
int index = 0;
List <int> lstUsedIndex = new List <int>();
// fill write values
foreach (ListViewItem item in this.listView.Items)
{
WriteValueInfo writeValInfo = item.Tag as WriteValueInfo;
if (writeValInfo.AttributesRead == true && writeValInfo.Error == false)
{
try
{
// convert string to type
if (writeValInfo.ValueRank == ValueRanks.Scalar)
{
DataValue dataValue = new DataValue();
dataValue.Value = TypeUtils.Cast(this.listView.Items[index].SubItems[0].Text, writeValInfo.DataType);
nodesToWrite.Add(new WriteValue()
{
NodeId = writeValInfo.NodeId,
Value = dataValue,
AttributeId = Attributes.Value
});
lstUsedIndex.Add(index);
}
else if (writeValInfo.ValueRank == ValueRanks.OneDimension)
{
DataValue dataValue = new DataValue();
dataValue.Value = TypeUtils.Cast(this.listView.Items[index].SubItems[0].Text, writeValInfo.DataType);
nodesToWrite.Add(new WriteValue()
{
NodeId = writeValInfo.NodeId,
Value = dataValue,
AttributeId = Attributes.Value
});
lstUsedIndex.Add(index);
}
}
catch (Exception exception)
{
this.listView.Items[index].SubItems[0].Text = exception.Message;
}
}
index++;
}
// Call to ClientAPI.
results = m_Session.Write(
nodesToWrite,
null);
// Update status label.
lblStatus.Text = "Writing values succeeded.";
}
catch (Exception e)
{
// Update status label.
lblStatus.Text = "An exception occured while writing values: " + e.Message;
}
}