添加项目文件。

Szmedi.RevitToolkit.Approval/Assists/PropertyAssists.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Newtonsoft.Json;
+
+namespace Szmedi.RevitToolkit.Approval.Assists
+{
+    internal class PropertyAssists
+    {
+        private static Dictionary<string, Dictionary<string, string>> _defaults;
+        // 默认初始值：程序目录下的 PropertyDefaults.json
+        private static string _filePath = Path.Combine(GlobalAssists.DirAssembly, "PropertyDefaults.json");
+
+        public static void Load(string filePath = null)
+        {
+            if (!string.IsNullOrEmpty(filePath))
+                _filePath = filePath;
+            if (!File.Exists(_filePath))
+            {
+                _defaults = new Dictionary<string, Dictionary<string, string>>();
+                var emptyJson = JsonConvert.SerializeObject(_defaults, Formatting.Indented);
+                File.WriteAllText(_filePath, emptyJson);
+                return;
+            }
+            var json = File.ReadAllText(_filePath);
+            _defaults = JsonConvert.DeserializeObject<Dictionary<string, Dictionary<string, string>>>(json);
+        }
+
+        public static string GetDefaultValue(string definitionName, string propName)
+        {
+            if (_defaults == null) return null;
+            if (_defaults.TryGetValue(definitionName, out var props))
+            {
+                if (props.TryGetValue(propName, out var value))
+                    return value;
+            }
+            return null;
+        }
+
+        // 新增：设置属性默认值
+        public static void SetDefaultValue(string definitionName, string propName, string value)
+        {
+            if (_defaults == null)
+                _defaults = new Dictionary<string, Dictionary<string, string>>();
+
+            if (!_defaults.TryGetValue(definitionName, out var props))
+            {
+                props = new Dictionary<string, string>();
+                _defaults[definitionName] = props;
+            }
+            props[propName] = value;
+        }
+
+        // 新增：保存到文件
+        public static void Save()
+        {
+            if (string.IsNullOrEmpty(_filePath) || _defaults == null) return;
+            var json = JsonConvert.SerializeObject(_defaults, Formatting.Indented);
+            File.WriteAllText(_filePath, json);
+        }
+    }
+}