工具表定模块 使用科学计数法

SCADA/Core/WeightCalibrationHelper.cs

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+using DynamicExpresso;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+
+namespace MesWork
+{
+    /// <summary>
+    /// 重量标定公式计算工具。
+    /// </summary>
+    public static class WeightCalibrationHelper
+    {
+        private class CalibrationCache
+        {
+            public string ToolName;
+            public string CalibrationValue;
+            public string Formula;
+            public string Description;
+            public DateTime LoadedAt;
+        }
+
+        private static readonly object CacheLock = new object();
+        private static readonly Dictionary<string, CalibrationCache> Cache = new Dictionary<string, CalibrationCache>(StringComparer.OrdinalIgnoreCase);
+        private static readonly TimeSpan CacheLife = TimeSpan.FromSeconds(3);
+
+        public static bool Apply(string opName, decimal rawWeight, out decimal calibratedWeight, out string formula, out string message)
+        {
+            calibratedWeight = rawWeight;
+            formula = "x";
+            message = "";
+
+            if (!TryGetConfig(opName, out CalibrationCache config, out string queryMsg))
+            {
+                message = string.IsNullOrWhiteSpace(queryMsg) ? "未找到工具标定配置" : queryMsg;
+                return false;
+            }
+
+            formula = NormalizeFormula(config.Formula);
+            return TryEvaluateFormula(formula, rawWeight, out calibratedWeight, out message);
+        }
+
+        public static void ClearCache()
+        {
+            lock (CacheLock)
+            {
+                Cache.Clear();
+            }
+        }
+
+        public static bool ValidateFormula(string formula, out string message)
+        {
+            decimal _;
+            return TryEvaluateFormula(NormalizeFormula(formula), 1M, out _, out message);
+        }
+
+        private static string NormalizeFormula(string formula)
+        {
+            return string.IsNullOrWhiteSpace(formula) ? "" : formula.Trim();
+        }
+
+        private static bool TryEvaluateFormula(string formula, decimal xValue, out decimal result, out string message)
+        {
+            result = xValue;
+            message = "";
+
+            if (string.IsNullOrWhiteSpace(formula))
+            {
+                message = "计算公式不能为空，至少填写 x";
+                return false;
+            }
+
+            try
+            {
+                var interpreter = new Interpreter();
+                interpreter.Reference(typeof(Math));
+                interpreter.SetVariable("x", xValue);
+                interpreter.SetVariable("X", xValue);
+
+                object value = interpreter.Eval(formula);
+                if (value == null)
+                {
+                    message = "计算公式未返回数值";
+                    return false;
+                }
+
+                result = Convert.ToDecimal(value, CultureInfo.InvariantCulture);
+                return true;
+            }
+            catch (Exception err)
+            {
+                message = $"计算公式错误：{err.Message}";
+                return false;
+            }
+        }
+
+        private static bool TryGetConfig(string opName, out CalibrationCache config, out string message)
+        {
+            config = null;
+            message = "";
+            string key = string.IsNullOrWhiteSpace(opName) ? "" : opName.Trim();
+
+            lock (CacheLock)
+            {
+                if (Cache.TryGetValue(key, out config) && DateTime.Now - config.LoadedAt < CacheLife)
+                {
+                    return true;
+                }
+            }
+
+            if (!B_DB_Opera.QueryToolCalibration(key, out string toolName, out string calibrationValue, out string formula, out string description, out message))
+            {
+                return false;
+            }
+
+            config = new CalibrationCache
+            {
+                ToolName = toolName,
+                CalibrationValue = calibrationValue,
+                Formula = formula,
+                Description = description,
+                LoadedAt = DateTime.Now
+            };
+
+            lock (CacheLock)
+            {
+                Cache[key] = config;
+            }
+            return true;
+        }
+    }
+}