private async Task TreeView_LoadRoots()
{
FileTree.Nodes.Clear();
FileTree.BeginUpdate();
var rootNode = new TreeNode(Environment.MachineName, 3, 3)
{
Tag = FactoryConstants.PC,
ToolTipText = Environment.MachineName,
Name = Environment.MachineName
};
FileTree.EndUpdate();
var nodes = await TreeNodeFactory.GetRootNodesAsync();
FileTree.BeginUpdate();
foreach (var node in nodes)
{
rootNode.Nodes.Add(node);
}
FileTree.Nodes.Add(rootNode);
FileTree.EndUpdate();
}
public async Task <ExecuteResult> ExecuteAsync()
{
var type = TargetNode.Tag as string;
switch (type)
{
case FactoryConstants.Driver:
case FactoryConstants.Folder:
case FactoryConstants.PC:
IList <TreeNode> newNodes;
if (type == FactoryConstants.PC)
{
newNodes = await TreeNodeFactory.GetRootNodesAsync();
}
else
{
if (!Directory.Exists(TargetNode.Name))
{
TreeView.BeginUpdate();
var fatherNode = TargetNode.Parent;
fatherNode.Nodes.Remove(TargetNode);
TreeView.EndUpdate();
return(new ExecuteResult(false, $"Directory \"{TargetNode.Name}\" does not exist"));
}
try
{
newNodes = await TreeNodeFactory.GetNodesAsync(TargetNode.Name);
}
catch (UnauthorizedAccessException e)
{
Debug.WriteLine(e);
return(new ExecuteResult(false, e.Message));
}
}
List <KeyValuePair <TreeNode, IList <TreeNode> > > nodesList = new List <KeyValuePair <TreeNode, IList <TreeNode> > >();
foreach (TreeNode node in newNodes)
{
if (node.Tag is string nodeType && nodeType.Equals(FactoryConstants.Folder))
{
node.Nodes.Clear();
if (!Directory.Exists(node.Name))
{
TargetNode.Nodes.Remove(node);
continue;
}
IList <TreeNode> nodes;
try
{
nodes = await TreeNodeFactory.GetNodesAsync(node.Name);
}
catch (UnauthorizedAccessException e)
{
Debug.WriteLine(e);
continue;
}
nodesList.Add(new KeyValuePair <TreeNode, IList <TreeNode> >(node, nodes));
}
}
TreeView.BeginUpdate();
TargetNode.Nodes.Clear();
foreach (var pair in nodesList)
{
var node = pair.Key;
foreach (var n in pair.Value)
{
node.Nodes.Add(n);
}
}
foreach (var n in newNodes)
{
TargetNode.Nodes.Add(n);
}
TreeView.EndUpdate();
break;
default:
return(new ExecuteResult(false, $"Unknown tree node tag:{type}"));;
}
return(new ExecuteResult(true, String.Empty));
}
