修复Log不显示的问题，重构了S7BackgroundService中的读取变量的方法
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@@ -1,5 +1,6 @@
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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@@ -66,6 +67,51 @@ namespace PMSWPF.Services
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_logger.LogInformation("S7 Background Service has stopped.");
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}
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/// <summary>
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/// 初始化或重新连接PLC客户端
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/// </summary>
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/// <param name="device">S7设备</param>
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/// <returns>连接成功的Plc客户端实例，如果连接失败则返回null</returns>
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private async Task<Plc?> InitializePlcClient(Device device)
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{
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// 检查字典中是否已存在该设备的PLC客户端
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if (!_s7PlcClients.TryGetValue(device.Id, out var plcClient))
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{
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// 如果不存在，则创建新的Plc客户端
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try
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{
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plcClient = new Plc(device.CpuType, device.Ip, (short)device.Prot, device.Rack, device.Slot);
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await plcClient.OpenAsync(); // 尝试打开连接
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_s7PlcClients[device.Id] = plcClient; // 将新创建的客户端添加到字典
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_logger.LogInformation($"已连接到S7 PLC: {device.Name} ({device.Ip})");
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, $"连接S7 PLC失败: {device.Name} ({device.Ip})");
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return null; // 连接失败，返回null
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}
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}
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else if (!plcClient.IsConnected)
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{
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// 如果存在但未连接，则尝试重新连接
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try
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{
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await plcClient.OpenAsync(); // 尝试重新打开连接
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_logger.LogInformation($"已重新连接到S7 PLC: {device.Name} ({device.Ip})");
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, $"重新连接S7 PLC失败: {device.Name} ({device.Ip})");
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return null; // 重新连接失败，返回null
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}
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}
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return plcClient; // 返回连接成功的Plc客户端
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}
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/// <summary>
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/// 轮询S7设备数据
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/// </summary>
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/// <param name="stoppingToken">取消令牌</param>
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private async Task PollS7Devices(CancellationToken stoppingToken)
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{
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if (_s7Devices == null || !_s7Devices.Any())
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@@ -78,98 +124,72 @@ namespace PMSWPF.Services
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{
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if (stoppingToken.IsCancellationRequested) return;
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if (!_s7PlcClients.ContainsKey(device.Id))
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// 尝试获取或初始化PLC客户端连接
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var plcClient = await InitializePlcClient(device);
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if (plcClient == null)
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{
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// Initialize Plc client for the device
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continue; // 如果连接失败，则跳过当前设备
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}
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// 读取设备变量
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await ReadDeviceVariables(plcClient, device, stoppingToken);
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}
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}
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/// <summary>
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/// 读取设备的S7变量并更新其值。
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/// </summary>
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/// <param name="plcClient">已连接的Plc客户端实例。</param>
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/// <param name="device">S7设备。</param>
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/// <param name="stoppingToken">取消令牌。</param>
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private async Task ReadDeviceVariables(Plc plcClient, Device device, CancellationToken stoppingToken)
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{
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// 过滤出当前设备和S7协议相关的变量
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var s7Variables = device.VariableTables
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.Where(vt => vt.ProtocolType == ProtocolType.S7 && vt.IsActive)
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.SelectMany(vt => vt.DataVariables)
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.ToList();
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if (!s7Variables.Any())
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{
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_logger.LogDebug($"设备 {device.Name} 没有找到活跃的S7变量。");
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return;
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}
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try
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{
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Stopwatch sw = Stopwatch.StartNew();
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// 遍历并读取每个S7变量
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foreach (var variable in s7Variables)
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{
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if (stoppingToken.IsCancellationRequested) return; // 如果取消令牌被请求，则停止读取
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try
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{
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var plc = new Plc(device.CpuType, device.Ip, (short)device.Prot, device.Rack, device.Slot);
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await plc.OpenAsync();
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_s7PlcClients[device.Id] = plc;
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_logger.LogInformation($"Connected to S7 PLC: {device.Name} ({device.Ip})");
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// 从PLC读取变量值
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var value = await plcClient.ReadAsync(variable.S7Address);
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if (value != null)
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{
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// 更新变量的原始数据值和显示值
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variable.DataValue = value.ToString();
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variable.DisplayValue = SiemensHelper.ConvertS7Value(value, variable.DataType, variable.Converstion);
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// _logger.LogDebug($"已读取变量 {variable.Name}: {variable.DataValue}");
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}
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, $"Failed to connect to S7 PLC: {device.Name} ({device.Ip})");
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continue;
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_logger.LogError(ex, $"从设备 {device.Name} 读取变量 {variable.Name} 失败。");
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}
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}
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var plcClient = _s7PlcClients[device.Id];
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if (!plcClient.IsConnected)
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{
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try
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{
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await plcClient.OpenAsync();
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_logger.LogInformation($"Reconnected to S7 PLC: {device.Name} ({device.Ip})");
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, $"Failed to reconnect to S7 PLC: {device.Name} ({device.Ip})");
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continue;
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}
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}
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// Filter variables for the current device and S7 protocol
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var s7VariablesTemp = device
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.VariableTables.Where(vd => vd.ProtocolType == ProtocolType.S7 && vd.IsActive)
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.ToList();
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var s7Variables = s7VariablesTemp.SelectMany(vt => vt.DataVariables)
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.ToList();
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// ?.SelectMany(vt => vt.DataVariables)
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if (s7Variables == null || !s7Variables.Any())
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{
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_logger.LogDebug($"No active S7 variables found for device: {device.Name}");
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continue;
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}
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// Batch read variables
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var addressesToRead = s7Variables.Select(vd => vd.S7Address)
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.ToList();
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if (!addressesToRead.Any()) continue;
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try
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{
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// S7.Net.Plus library supports ReadMultiple, but it's more complex for different data types.
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// For simplicity, we'll read them one by one for now, or use a more advanced batch read if all are same type.
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// A more robust solution would involve grouping by data block and type.
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// Example of reading multiple items (assuming all are of type DWord for simplicity)
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// This part needs to be refined based on actual variable types and addresses
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// var dataItems = addressesToRead.Select(addr => new DataItem { DataType = DataType.DataBlock, VarType = VarType.DWord, StringLength = 1, DB = 1, StartByteAdr = 0 }).ToList();
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// plcClient.ReadMultiple(dataItems);
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foreach (var variable in s7Variables)
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{
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if (stoppingToken.IsCancellationRequested) return;
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try
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{
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// This is a simplified read. In a real scenario, you'd parse S7Address
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// to get DataType, DB, StartByteAdr, BitAdr, etc.
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// For now, assuming S7Address is directly readable by Read method (e.g., "DB1.DBW0")
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var value = await plcClient.ReadAsync(variable.S7Address);
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if (value != null)
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{
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// Update the variable's DataValue and DisplayValue
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variable.DataValue = value.ToString();
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variable.DisplayValue
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= SiemensHelper.ConvertS7Value(value, variable.DataType, variable.Converstion);
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_logger.LogDebug($"Read {variable.Name}: {variable.DataValue}");
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}
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, $"Failed to read variable {variable.Name} from {device.Name}");
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}
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}
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, $"Error during batch read for device {device.Name}");
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}
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sw.Stop();
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_logger.LogInformation($"从: {device.Name} ({device.Ip})读取变量总耗时：{sw.ElapsedMilliseconds}ms");
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, $"设备 {device.Name} 批量读取过程中发生错误。");
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}
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}
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