382 lines
13 KiB
C#
382 lines
13 KiB
C#
using Logger;
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using OxyPlot;
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using OxyPlot.Axes;
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using OxyPlot.Legends;
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using OxyPlot.Series;
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using Prism.Commands;
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Windows.Input;
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using UIShare.ViewModelBase;
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namespace MonitorModule.ViewModels
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{
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/// <summary>
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/// 曲线回读：加载 RecordView 导出的 CSV 文件，按 (MonitorName, Scope) 分组绘制曲线。
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/// </summary>
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public class CurveRecallViewModel : NavigateViewModelBase, IRegionMemberLifetime, IDisposable
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{
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#region 属性
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public bool KeepAlive => true;
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public PlotModel Plot { get; }
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/// <summary>已加载的曲线通道列表</summary>
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public ObservableCollection<CurveRecallChannelVM> Channels { get; } = new();
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private CurveRecallChannelVM? _selectedChannel;
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public CurveRecallChannelVM? SelectedChannel
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{
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get => _selectedChannel;
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set => SetProperty(ref _selectedChannel, value);
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}
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private string _statusMessage = "请加载 CSV 文件以回读曲线";
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public string StatusMessage
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{
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get => _statusMessage;
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set => SetProperty(ref _statusMessage, value);
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}
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#endregion
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#region 命令
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public ICommand LoadCsvCommand { get; }
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public ICommand ResetViewCommand { get; }
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public ICommand ClearCommand { get; }
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#endregion
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#region 私有字段
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// 颜色调色盘（与 MonitorView 一致）
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private static readonly OxyColor[] _palette =
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{
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OxyColors.SteelBlue, OxyColors.IndianRed, OxyColors.SeaGreen,
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OxyColors.DarkOrange, OxyColors.MediumPurple, OxyColors.Goldenrod,
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OxyColors.Teal, OxyColors.Crimson, OxyColors.OliveDrab
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};
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private int _colorIndex;
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#endregion
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public CurveRecallViewModel(IContainerProvider containerProvider) : base(containerProvider)
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{
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Plot = BuildEmptyPlot();
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LoadCsvCommand = new DelegateCommand(OnLoadCsv);
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ResetViewCommand = new DelegateCommand(OnResetView);
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ClearCommand = new DelegateCommand(OnClear);
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}
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#region 命令处理
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/// <summary>
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/// 打开 CSV 文件对话框，解析数据并按 (MonitorName, Scope) 分组绘制曲线。
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/// </summary>
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private void OnLoadCsv()
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{
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try
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{
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var dlg = new Microsoft.Win32.OpenFileDialog
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{
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Filter = "CSV 文件 (*.csv)|*.csv|所有文件|*.*",
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Title = "选择要加载的监测数据 CSV 文件"
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};
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if (dlg.ShowDialog() != true) return;
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var records = ParseCsv(dlg.FileName);
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if (records.Count == 0)
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{
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StatusMessage = "CSV 文件为空或格式不正确";
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return;
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}
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// 按 (MonitorName, Scope) 分组
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var groups = records.GroupBy(r => (r.MonitorName, r.Scope))
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.OrderBy(g => g.Key.MonitorName)
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.ThenBy(g => g.Key.Scope);
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// 清空旧数据
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ClearPlotAndChannels();
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foreach (var group in groups)
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{
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var color = _palette[_colorIndex % _palette.Length];
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_colorIndex++;
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string displayName = string.IsNullOrEmpty(group.Key.Scope)
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? group.Key.MonitorName
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: $"{group.Key.MonitorName} [{group.Key.Scope}]";
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var channel = new CurveRecallChannelVM
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{
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MonitorName = group.Key.MonitorName,
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Scope = group.Key.Scope,
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DisplayName = displayName,
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Color = color,
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IsDisplayed = true
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};
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// 创建 LineSeries 并填充数据点
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channel.Series = new LineSeries
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{
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Title = displayName,
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Color = color,
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StrokeThickness = 1.5
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};
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// 按时间排序
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var sortedPoints = group.OrderBy(r => r.CreateTime);
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foreach (var point in sortedPoints)
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{
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channel.Series.Points.Add(new DataPoint(point.CreateTime.ToOADate(), point.MonitorValue));
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}
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channel.PropertyChanged += OnChannelPropertyChanged;
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Plot.Series.Add(channel.Series);
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Channels.Add(channel);
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}
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Plot.InvalidatePlot(true);
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StatusMessage = $"已加载 {Path.GetFileName(dlg.FileName)}，共 {Channels.Count} 条曲线，{records.Count} 个数据点";
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LoggerHelper.Info($"曲线回读：加载 {dlg.FileName}，{Channels.Count} 条曲线，{records.Count} 个数据点");
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}
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catch (Exception ex)
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{
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LoggerHelper.Error($"加载 CSV 失败：{ex.Message}");
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StatusMessage = $"加载失败：{ex.Message}";
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}
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}
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private void OnResetView()
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{
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Plot.ResetAllAxes();
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Plot.InvalidatePlot(false);
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StatusMessage = "视图已复原";
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}
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private void OnClear()
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{
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ClearPlotAndChannels();
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Plot.InvalidatePlot(true);
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StatusMessage = "已清空，请重新加载 CSV 文件";
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}
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#endregion
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#region CSV 解析
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/// <summary>
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/// 解析 RecordView 导出的 CSV 文件，返回监测记录列表。
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/// </summary>
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private static List<MonitorRecord> ParseCsv(string path)
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{
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var results = new List<MonitorRecord>();
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using var sr = new StreamReader(path, Encoding.UTF8);
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// 读取表头
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string? headerLine = sr.ReadLine();
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if (headerLine == null) return results;
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var headers = ParseCsvLine(headerLine);
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int monitorNameIdx = headers.FindIndex(h => h.Trim() == "MonitorName");
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int monitorValueIdx = headers.FindIndex(h => h.Trim() == "MonitorValue");
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int scopeIdx = headers.FindIndex(h => h.Trim() == "Scope");
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int createTimeIdx = headers.FindIndex(h => h.Trim() == "CreateTime");
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if (monitorNameIdx < 0 || monitorValueIdx < 0 || scopeIdx < 0 || createTimeIdx < 0)
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return results;
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int maxIdx = Math.Max(monitorNameIdx, Math.Max(monitorValueIdx, Math.Max(scopeIdx, createTimeIdx)));
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string? line;
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while ((line = sr.ReadLine()) != null)
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{
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if (string.IsNullOrWhiteSpace(line)) continue;
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var fields = ParseCsvLine(line);
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if (fields.Count <= maxIdx) continue;
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if (!double.TryParse(fields[monitorValueIdx].Trim(), out double value)) continue;
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if (!DateTime.TryParse(fields[createTimeIdx].Trim(), out DateTime createTime)) continue;
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results.Add(new MonitorRecord
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{
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MonitorName = fields[monitorNameIdx].Trim(),
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MonitorValue = value,
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Scope = fields[scopeIdx].Trim(),
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CreateTime = createTime
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});
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}
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return results;
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}
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/// <summary>
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/// 解析单行 CSV，正确处理引号转义。
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/// </summary>
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private static List<string> ParseCsvLine(string line)
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{
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var fields = new List<string>();
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bool inQuotes = false;
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var sb = new StringBuilder();
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for (int i = 0; i < line.Length; i++)
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{
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char c = line[i];
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if (inQuotes)
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{
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if (c == '"')
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{
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if (i + 1 < line.Length && line[i + 1] == '"')
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{
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sb.Append('"');
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i++;
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}
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else
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{
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inQuotes = false;
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}
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}
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else
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{
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sb.Append(c);
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}
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}
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else
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{
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if (c == '"')
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{
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inQuotes = true;
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}
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else if (c == ',')
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{
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fields.Add(sb.ToString());
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sb.Clear();
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}
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else
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{
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sb.Append(c);
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}
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}
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}
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fields.Add(sb.ToString());
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return fields;
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}
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#endregion
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#region OxyPlot 构建
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/// <summary>
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/// 构建空的 OxyPlot 模型（与 MonitorView 完全一致的配置）。
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/// </summary>
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private static PlotModel BuildEmptyPlot()
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{
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var pm = new PlotModel
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{
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Title = "曲线回读",
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PlotAreaBorderColor = OxyColors.LightGray,
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Background = OxyColors.White
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};
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pm.Axes.Add(new DateTimeAxis
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{
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Position = AxisPosition.Bottom,
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Title = "时间",
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StringFormat = "HH:mm:ss",
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MajorGridlineStyle = LineStyle.Dot,
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MinorGridlineStyle = LineStyle.None
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});
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pm.Axes.Add(new LinearAxis
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{
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Position = AxisPosition.Left,
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Title = "值",
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MajorGridlineStyle = LineStyle.Dot,
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MinorGridlineStyle = LineStyle.None
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});
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pm.Legends.Add(new Legend
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{
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LegendPosition = LegendPosition.RightTop,
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LegendBackground = OxyColor.FromAColor(200, OxyColors.White),
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LegendBorder = OxyColors.LightGray
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});
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return pm;
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}
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#endregion
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#region 辅助方法
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private void OnChannelPropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
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{
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if (e.PropertyName != nameof(CurveRecallChannelVM.IsDisplayed)) return;
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if (sender is not CurveRecallChannelVM channel) return;
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if (channel.IsDisplayed)
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{
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if (channel.Series != null && !Plot.Series.Contains(channel.Series))
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{
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Plot.Series.Add(channel.Series);
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}
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}
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else
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{
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if (channel.Series != null)
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{
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Plot.Series.Remove(channel.Series);
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}
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}
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Plot.InvalidatePlot(true);
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}
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private void ClearPlotAndChannels()
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{
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foreach (var ch in Channels)
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{
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ch.PropertyChanged -= OnChannelPropertyChanged;
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}
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Plot.Series.Clear();
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Channels.Clear();
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_colorIndex = 0;
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}
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#endregion
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#region 生命周期
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public override void OnNavigatedTo(NavigationContext navigationContext)
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{
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}
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public void Dispose()
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{
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ClearPlotAndChannels();
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}
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#endregion
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}
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/// <summary>
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/// CSV 监测记录（单行数据）。
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/// </summary>
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internal class MonitorRecord
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{
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public string MonitorName { get; set; } = string.Empty;
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public double MonitorValue { get; set; }
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public string Scope { get; set; } = string.Empty;
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public DateTime CreateTime { get; set; }
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}
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/// <summary>
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/// 曲线回读通道：MonitorName + Scope 唯一标识一条曲线。
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/// </summary>
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public class CurveRecallChannelVM : Prism.Mvvm.BindableBase
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{
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public string MonitorName { get; set; } = string.Empty;
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public string Scope { get; set; } = string.Empty;
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public string DisplayName { get; set; } = string.Empty;
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public OxyColor Color { get; set; } = OxyColors.SteelBlue;
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private bool _isDisplayed = true;
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public bool IsDisplayed
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{
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get => _isDisplayed;
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set => SetProperty(ref _isDisplayed, value);
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}
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public LineSeries? Series { get; set; }
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}
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}
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