做一个交互式绘制文字的工具，希望这次设置的Symbol，下次打开ArcMap时自动调用这个Symbol，并支持对其进行修改。

解决方法是将这个Symbol写入注册表中，每次自动读取上一次设置的Symbol，如果修改了Symbol，则自动写入注册表中。

相关文章:

注册表读写

http://blog.csdn.net/p424671075/article/details/6176219

ESRI COM对象序列化

http://blog.csdn.net/xgyb12458/article/details/4125911

Object与二进制的转换

http://www.cnblogs.com/jesszhu/archive/2013/08/22/3276556.html

阅读上述帖子后，开始着手写。首先想的是将ISymbol装箱为Object，再序列号为二进制，就可以写入注册表了。调试时显示这个Object不支持序列化

后来查阅到COM对象的序列化，需要用到IXMLSerializer，将COM对象序列化为字符，使用方式如下：

public string esriSerializer(object obj)        {            IXMLSerializer xmlSerializer = new XMLSerializerClass();            string xmlstring = xmlSerializer.SaveToString(obj, null, null);            return xmlstring;        }        public object esriDeserializer(string str)        {            IXMLSerializer xmlSerializer = new XMLSerializerClass();            return xmlSerializer.LoadFromString(str, null, null);        }

　　　　public string esriSerializer(object obj)        {            IXMLSerializer xmlSerializer = new XMLSerializerClass();            string xmlstring = xmlSerializer.SaveToString(obj, null, null);            return xmlstring;        }        public object esriDeserializer(string str)        {            IXMLSerializer xmlSerializer = new XMLSerializerClass();            return xmlSerializer.LoadFromString(str, null, null);        }

之后，在将字符串对象序列化为二进制，写入注册表即可。

序列化为与反序列化二进制的代码如下：

public byte[] BinarySerializer(object obj)        {            try            {                using (var ms = new MemoryStream())                {                    var formatter = new BinaryFormatter();                    formatter.Serialize(ms, obj);                    var data = ms.ToArray();                    return data;                }            }            catch (InvalidOperationException)            {                throw;            }        }        public object BinaryDeserializer(byte[] bt)        {            object obj=null;            try            {                using (var ms = new MemoryStream(bt))                {                    var formatter = new BinaryFormatter();                    obj=formatter.Deserialize(ms);                }            }            catch (InvalidOperationException)            {                            }            return obj;        }

读取与写入注册表代码如下：

/// 
        /// 从注册表获取值        /// 
        /// 工具名称        /// 值名称        /// 
             public object getValueFromReg(string toolname,string key)        {            object obj=null;            try            {                RegistryKey rkey = Registry.LocalMachine;                RegistryKey rootkey = Registry.LocalMachine;                RegistryKey sftkey = rootkey.OpenSubKey("software", true);                RegistryKey llcsft = sftkey.OpenSubKey("llcSft");                RegistryKey AddinCfg = llcsft.OpenSubKey("AddInConfig");                RegistryKey AddInName = AddinCfg.OpenSubKey(toolname);                byte[] tmp = (byte[])AddInName.GetValue(key);                obj = esriDeserializer(BinaryDeserializer(tmp).ToString());            }            catch (System.Exception ex)            {                return null;            }            return obj;        }        /// 
        /// 写入注册表        /// 
        /// 工具名称        /// 键值        /// 
             public bool setValueToReg(string toolName,KeyValuePair
     
       pm)        {            try            {                RegistryKey rootkey = Registry.LocalMachine;                RegistryKey sftkey = rootkey.OpenSubKey("software",true);                RegistryKey llcsft = sftkey.CreateSubKey("llcSft");                RegistryKey AddinCfg = llcsft.CreateSubKey("AddInConfig");                RegistryKey AddInName = AddinCfg.CreateSubKey(toolName);                AddInName.SetValue(pm.Key, BinarySerializer(esriSerializer(pm.Value)), RegistryValueKind.Binary);            }            catch (System.Exception ex)            {                            }            return true;        }
     

使用中，直接调用setValueToReg，getValueFromReg两个函数即可。