public void BuildTree()
{
ClearNodes();
if (IsFieldActive() && (Source.DataView.State != DAE.Client.DataSetState.Insert))
{
// Open a dynamic navigable browse cursor on the root expression
PrepareRootPlan();
IServerCursor cursor = _rootPlan.Open(_rootParams);
try
{
DAE.Runtime.Data.IRow key;
int columnIndex;
string text;
while (cursor.Next())
{
key = new DAE.Runtime.Data.Row(_process.ValueManager, new DAE.Schema.RowType(Source.DataView.Order.Columns));
try
{
using (DAE.Runtime.Data.IRow row = cursor.Select())
{
row.CopyTo(key);
columnIndex = row.DataType.Columns.IndexOf(ColumnName);
if (row.HasValue(columnIndex))
{
text = ((DAE.Runtime.Data.Scalar)row.GetValue(columnIndex)).AsDisplayString;
}
else
{
text = Strings.Get("NoValue");
}
}
Nodes.Add(new TreeNode(this, text, key, 0, null));
}
catch
{
key.Dispose();
throw;
}
}
}
finally
{
_rootPlan.Close(cursor);
}
foreach (TreeNode node in Nodes)
{
node.BuildChildren();
}
SelectNode(Source.DataView.GetKey());
}
}
/// <summary> Creates this nodes immediate children. Avoids duplication. </summary>
public void BuildChildren()
{
// Open a dynamic navigable browse cursor on the child expression
IServerCursor cursor = Tree.OpenChildCursor(_key);
try
{
DAE.Runtime.Data.Row key;
string text;
int index = 0;
int columnIndex;
while (cursor.Next())
{
key = new DAE.Runtime.Data.Row(Tree.Process.ValueManager, new RowType(Tree.Source.DataView.Order.Columns));
try
{
using (DAE.Runtime.Data.IRow row = cursor.Select())
{
row.CopyTo(key);
columnIndex = row.DataType.Columns.IndexOf(Tree.ColumnName);
if (row.HasValue(columnIndex))
{
text = ((DAE.Runtime.Data.Scalar)row.GetValue(columnIndex)).AsDisplayString;
}
else
{
text = Strings.Get("NoValue");
}
}
if (FindChild(key) == null)
{
Nodes.Insert(index, new TreeNode(Tree, text, key, _depth + 1, this));
}
index++;
}
catch
{
key.Dispose();
throw;
}
}
}
finally
{
Tree.CloseChildCursor(cursor);
}
}
protected void BuildParentPath(DAE.Runtime.Data.IRow key, ArrayList path)
{
foreach (DAE.Runtime.Data.Row localKey in path)
{
if (KeysEqual(key, localKey))
{
throw new WebClientException(WebClientException.Codes.TreeViewInfiniteLoop);
}
}
path.Add(key);
IServerCursor cursor = OpenParentCursor(key);
try
{
if (cursor.Next())
{
key = new DAE.Runtime.Data.Row(_process.ValueManager, new RowType(Source.DataView.Order.Columns));
using (DAE.Runtime.Data.IRow selected = cursor.Select())
selected.CopyTo(key);
}
else
{
key = null;
}
}
finally
{
CloseParentCursor(cursor);
}
if (key != null)
{
if (FindChild(key) == null)
{
BuildParentPath(key, path);
}
else
{
path.Add(key);
}
}
}