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解决TreeView的TreeView_SelectedItemChanged事件被多次调用的问题

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This commit is contained in:
David P.G
2025-09-02 13:09:00 +08:00
parent 254ab63837
commit 9b7c91eae9
6 changed files with 208 additions and 251 deletions
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262
DMS.WPF/ViewModels/Dialogs/ImportOpcUaDialogViewModel.cs
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@@ -1,5 +1,8 @@
using AutoMapper;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using DMS.Core.Enums;
using DMS.Core.Helper;
using DMS.Core.Models;
using DMS.Helper;
using DMS.Infrastructure.Interfaces.Services;
@@ -17,10 +20,10 @@ public partial class ImportOpcUaDialogViewModel : DialogViewModelBase<List<Varia
private string _endpointUrl = "opc.tcp://127.0.0.1:4855"; // 默认值
[ObservableProperty]
private OpcUaNode _rootOpcUaNode;
private OpcUaNodeItemViewModel _rootOpcUaNode;
[ObservableProperty]
private ObservableCollection<Variable> _selectedNodeVariables;
private ObservableCollection<VariableItemViewModel> _selectedNodeVariables;
public List<Variable> SelectedVariables { get; set; } = new List<Variable>();
@@ -39,15 +42,15 @@ public partial class ImportOpcUaDialogViewModel : DialogViewModelBase<List<Varia
private Session _session;
private readonly IOpcUaService _opcUaService;
private readonly IMapper _mapper;
private CancellationTokenSource _cancellationTokenSource;
public ImportOpcUaDialogViewModel(IOpcUaService opcUaService)
public ImportOpcUaDialogViewModel(IOpcUaService opcUaService,IMapper mapper)
{
//OpcUaNodes = new ObservableCollection<OpcUaNode>();
SelectedNodeVariables = new ObservableCollection<Variable>();
SelectedNodeVariables = new ObservableCollection<VariableItemViewModel>();
this._opcUaService = opcUaService;
RootOpcUaNode = new OpcUaNode() { DisplayName = "根节点", NodeId = Objects.ObjectsFolder };
this._mapper = mapper;
RootOpcUaNode = new OpcUaNodeItemViewModel() { DisplayName = "根节点", NodeId = Objects.ObjectsFolder, IsExpanded = true };
_cancellationTokenSource = new CancellationTokenSource();
}
@@ -65,6 +68,7 @@ public partial class ImportOpcUaDialogViewModel : DialogViewModelBase<List<Varia
if (_opcUaService.IsConnected)
{
IsConnected=true;
ConnectButtonText = "已连接";
IsConnectButtonEnabled = false;
}
@@ -72,7 +76,8 @@ public partial class ImportOpcUaDialogViewModel : DialogViewModelBase<List<Varia
// 浏览根节点
await _opcUaService.BrowseNode(RootOpcUaNode);
var childrens= await _opcUaService.BrowseNode(_mapper.Map<OpcUaNode>(RootOpcUaNode));
RootOpcUaNode.Children = _mapper.Map<ObservableCollection<OpcUaNodeItemViewModel>>(childrens);
}
@@ -85,6 +90,18 @@ public partial class ImportOpcUaDialogViewModel : DialogViewModelBase<List<Varia
}
}
[RelayCommand]
private async void PrimaryButton()
{
await _opcUaService.DisconnectAsync();
}
[RelayCommand]
private async void CloseButton()
{
await _opcUaService.DisconnectAsync();
}
/// <summary>
/// 处理来自服务器的数据变化通知
/// </summary>
@@ -97,176 +114,69 @@ public partial class ImportOpcUaDialogViewModel : DialogViewModelBase<List<Varia
}
}
//private async Task BrowseNodes(ObservableCollection<OpcUaNode> nodes, NodeId parentNodeId)
//{
// try
// {
// Opc.Ua.ReferenceDescriptionCollection references;
// byte[] continuationPoint = null;
// _session.Browse(
// null, // RequestHeader
// new ViewDescription(),
// parentNodeId,
// 0u,
// BrowseDirection.Forward,
// Opc.Ua.ReferenceTypeIds.HierarchicalReferences,
// true,
// (uint)Opc.Ua.NodeClass.Object | (uint)Opc.Ua.NodeClass.Variable,
// out continuationPoint,
// out references
// );
// foreach (var rd in references)
// {
// NodeType nodeType = NodeType.Folder; // 默认是文件夹
// if ((rd.NodeClass & NodeClass.Variable) != 0)
// {
// nodeType = NodeType.Variable;
// }
// else if ((rd.NodeClass & NodeClass.Object) != 0)
// {
// nodeType = NodeType.Object;
// }
// var opcUaNode = new OpcUaNode(rd.DisplayName.Text, (NodeId)rd.NodeId, nodeType);
// nodes.Add(opcUaNode);
// // 如果是文件夹或对象，添加一个虚拟子节点，用于懒加载
// if (nodeType == NodeType.Folder || nodeType == NodeType.Object)
// {
// opcUaNode.Children.Add(new OpcUaNode("Loading...", NodeId.Null, NodeType.Folder)); // 虚拟节点
// }
// }
// }
// catch (Exception ex)
// {
// NlogHelper.Error($"浏览 OPC UA 节点失败: {parentNodeId} - {ex.Message}", ex);
// NotificationHelper.ShowError($"浏览 OPC UA 节点失败: {parentNodeId} - {ex.Message}", ex);
// }
//}
//public async Task LoadNodeVariables(OpcUaNode node)
//{
//if (node.NodeType == NodeType.Variable)
//{
// // 如果是变量节点，直接显示它
// SelectedNodeVariables.Clear();
// SelectedNodeVariables.Add(new Variable
// {
// Name = node.DisplayName,
// NodeId = node.NodeId.ToString(),
// OpcUaNodeId = node.NodeId.ToString(),
// ProtocolType = ProtocolType.OpcUA,
// IsActive = true // 默认选中
// });
// return;
//}
//if (node.IsLoaded || node.IsLoading)
//{
// return; // 已经加载或正在加载
//}
//node.IsLoading = true;
//node.Children.Clear(); // 清除虚拟节点
//try
//{
// Opc.Ua.ReferenceDescriptionCollection references;
// byte[] continuationPoint = null;
// _session.Browse(
// null, // RequestHeader
// new ViewDescription(),
// node.NodeId,
// 0u,
// BrowseDirection.Forward,
// Opc.Ua.ReferenceTypeIds.HierarchicalReferences,
// true,
// (uint)Opc.Ua.NodeClass.Object | (uint)Opc.Ua.NodeClass.Variable,
// out continuationPoint,
// out references
// );
// foreach (var rd in references)
// {
// NodeType nodeType = NodeType.Folder;
// if ((rd.NodeClass & NodeClass.Variable) != 0)
// {
// nodeType = NodeType.Variable;
// }
// else if ((rd.NodeClass & NodeClass.Object) != 0)
// {
// nodeType = NodeType.Object;
// }
// var opcUaNode = new OpcUaNode(rd.DisplayName.Text, (NodeId)rd.NodeId, nodeType);
// node.Children.Add(opcUaNode);
// if (nodeType == NodeType.Folder || nodeType == NodeType.Object)
// {
// opcUaNode.Children.Add(new OpcUaNode("Loading...", NodeId.Null, NodeType.Folder)); // 虚拟节点
// }
// // 如果是变量，添加到右侧列表
// if (nodeType == NodeType.Variable)
// {
// // Read the DataType attribute
// ReadValueId readValueId = new ReadValueId
// {
// NodeId = opcUaNode.NodeId,
// AttributeId = Attributes.DataType,
// // You might need to specify IndexRange and DataEncoding if dealing with arrays or specific encodings
// };
// DataValueCollection results;
// DiagnosticInfoCollection diagnosticInfos;
// _session.Read(
// null, // RequestHeader
// 0, // MaxAge
// TimestampsToReturn.Source,
// new ReadValueIdCollection { readValueId },
// out results,
// out diagnosticInfos
// );
// string dataType = string.Empty;
// if (results != null && results.Count > 0 && results[0].Value != null)
// {
// // Convert the NodeId of the DataType to a readable string
// NodeId dataTypeNodeId = (NodeId)results[0].Value;
// dataType = _session.NodeCache.GetDisplayText(dataTypeNodeId);
// }
// SelectedNodeVariables.Add(new Variable
// {
// Name = opcUaNode.DisplayName,
// OpcUaNodeId = opcUaNode.NodeId.ToString(),
// ProtocolType = ProtocolType.OpcUA,
// IsActive = true, // Default selected
// DataType = dataType // Assign the read DataType
// });
// }
// }
// node.IsLoaded = true;
//}
//catch (Exception ex)
//{
// NlogHelper.Error($"加载 OPC UA 节点变量失败: {node.NodeId} - {ex.Message}", ex);
// NotificationHelper.ShowError($"加载 OPC UA 节点变量失败: {node.NodeId} - {ex.Message}", ex);
//}
//finally
//{
// node.IsLoading = false;
//}
//}
public ObservableCollection<Variable> GetSelectedVariables()
private bool _isLoadingNodeVariables = false;
public async Task LoadNodeVariables(OpcUaNodeItemViewModel node)
{
return new ObservableCollection<Variable>(SelectedVariables);
// 防止重复加载
if (_isLoadingNodeVariables)
return;
_isLoadingNodeVariables = true;
try
{
SelectedNodeVariables.Clear();
if (node.NodeClass == NodeClass.Variable)
{
// 如果是变量节点，直接显示它
SelectedNodeVariables.Add(new VariableItemViewModel
{
Name = node.DisplayName,
OpcUaNodeId = node.NodeId.ToString(),
Protocol = ProtocolType.OpcUa,
IsActive = true // 默认选中
});
return;
}
// 加载节点的子项
node.IsExpanded = true;
node.IsSelected = true;
var childrens = await _opcUaService.BrowseNode(_mapper.Map<OpcUaNode>(node));
foreach (var children in childrens)
{
var opcNodeItem = _mapper.Map<OpcUaNodeItemViewModel>(children);
if (children.NodeClass == NodeClass.Variable)
{
SelectedNodeVariables.Add(new VariableItemViewModel
{
Name = children.DisplayName, // 修正：使用子节点的显示名称
OpcUaNodeId = children.NodeId.ToString(),
Protocol = ProtocolType.OpcUa,
IsActive = true // 默认选中
});
}
else
{
node.Children.Add(opcNodeItem);
}
}
}
catch (Exception ex)
{
NlogHelper.Error($"加载 OPC UA 节点变量失败: {node.NodeId} - {ex.Message}", ex);
NotificationHelper.ShowError($"加载 OPC UA 节点变量失败: {node.NodeId} - {ex.Message}", ex);
}
finally
{
_isLoadingNodeVariables = false;
}
}
}