公司是做CS产品的, 最近分配给我一个活, 要求:
1. 公司程序启动时, 检测是否有配置文件, 没有的话则按默认值创建一个
2. 配置文件要加密, 不能让客户随便看到里面的参数
3. 配置文件要有配套的GUI配置工具, 因为现场实施人员嫌XML配置麻烦
如果只有一个产品需要这个功能, 把每个配置项的读写功能硬编码写到工具里就完事了, 但公司有好几个产品都需要这个, 不得不写一个通用的工具类
这个工作还解决了两个问题:
a. 以前设置项都配置在 app.config 里, 每次升级都会覆盖原来的设置, 所以现场人员都必须先将 app.config复制出来.
b. app.config 里新增了配置项, 现场实施人员必须仔细对比, 将新增项人工放入原来的app.config
现在的做法是, 配置文件ConfigSetting.xml并不在安装包中, 所以卸载升级都不会影响它; 程序第一次启动时, 会按默认值生成一个ConfigSetting.xml; 以后程序启动的时候, 假如有新增的配置项, 则将其加入ConfigSetting.xml
我把涉及的两个类都放在了一个文件, 这样引入一个文件即可
using System;
using System.Collections.Generic;
using System.Xml.Linq;
using System.Security.Cryptography;
using System.IO;
/// <summary>
/// 设置项的帮助类
/// </summary>
public class ConfigSettingTool
{
/// <summary>
/// 保存读取时, 是否加密解密; 设为false, 可以方便调试
/// 其实也只能防小白, 随便反编译一下就啥都漏出来了
/// </summary>
private static bool isEncrypt = false;
/// <summary>
/// 默认的配置文件名
/// </summary>
public static readonly string DefaultXmlFileName = "ConfigSetting.xml";
/// <summary>
/// 获取XDocument, 解密失败、XML结构不合理, 都会根据模板重新生成一个
/// </summary>
/// <param name="xmlFileName"></param>
/// <param name="msg"></param>
/// <returns>确保返回如下格式
/// <?xml version="1.0" encoding="utf-8" standalone="yes"?>
/// <Setting>
/// <SingleSetting></SingleSetting>
/// </Setting>
/// </returns>
public static XDocument GetXDocument(string xmlFileName, out string msg)
{
msg = null;
if (!System.IO.File.Exists(xmlFileName))
{
msg = "配置文件不存在, 创建默认配置文件";
return new XDocument(new XDeclaration("1.0", "utf-8", "yes"), new XElement("Setting", new XElement("SingleSetting")));
}
try
{
var textContent = System.IO.File.ReadAllText(xmlFileName);
textContent = isEncrypt ? Decrypt(textContent) : textContent;
var xdoc = XDocument.Parse(textContent);
if (xdoc.Root.Name != "Setting")
{
throw new Exception("根节点不是 Setting");
}
if (xdoc.Root.Element("SingleSetting") == null)
{
throw new Exception("没有 SingleSetting 节点");
}
return xdoc;
}
catch
{
msg = "配置文件不是标准格式, 删除后, 创建默认配置文件";
return new XDocument(new XDeclaration("1.0", "utf-8", "yes"), new XElement("Setting", new XElement("SingleSetting")));
}
}
/// <summary>
/// 将xml信息读出到settingArray, 如果缺少某项设定则增加到xdoc
/// </summary>
/// <param name="xdoc"></param>
/// <param name="settingList">通常就是GlobalSetting.DefaultGlobalSettingArray</param>
public static void ReadValueToSettingArray(XDocument xdoc, List<ConfigureItemModel> settingArray)
{
var singleSettingElement = xdoc.Root.Element("SingleSetting");
foreach (var configureItem in settingArray)
{
configureItem.ErrorMsg = null;
var element = singleSettingElement.Element(configureItem.Name);
if (element == null)
{
element = new XElement(configureItem.Name, configureItem.DefaultValue, new XAttribute("Caption", configureItem.Caption), new XAttribute("Description", configureItem.Description), new XAttribute("DefaultValue", configureItem.DefaultValue), new XAttribute("CanBeEmpty", configureItem.CanBeEmpty));
singleSettingElement.Add(element);
}
configureItem.Value = string.IsNullOrWhiteSpace(element.Value) ? "" : element.Value.Trim();
}
}
/// <summary>
/// 将xml信息读出到settingArray
/// </summary>
/// <param name="xdoc"></param>
/// <param name="settingList">通常就是GlobalSetting.DefaultGlobalSettingArray</param>
public static void ReadConfig(XDocument xdoc, out List<ConfigureItemModel> settingList)
{
settingList = new List<ConfigureItemModel>();
var singleSettingElement = xdoc.Root.Element("SingleSetting");
foreach (var element in singleSettingElement.Elements())
{
var captionAttribute = element.Attribute("Caption");
var caption = captionAttribute != null ? captionAttribute.Value : "";
var name = element.Name.ToString();
var value = element.Value.ToString();
var descriptionAttribute = element.Attribute("Description");
var description = descriptionAttribute != null ? descriptionAttribute.Value : "";
var defaultValueAttribute = element.Attribute("DefaultValue");
var defaultValue = defaultValueAttribute != null ? defaultValueAttribute.Value : "";
var canBeEmpty = false;
try
{
canBeEmpty = bool.Parse(element.Attribute("CanBeEmpty").Value);
}
catch { }
var errorMsgAttribute = element.Attribute("ErrorMsg");
var errorMsg = errorMsgAttribute != null ? errorMsgAttribute.Value : "";
var configureItem = new ConfigureItemModel(caption, name, defaultValue, description, canBeEmpty) { Value = value, ErrorMsg = errorMsg };
settingList.Add(configureItem);
}
}
/// <summary>
/// 尝试解析设置内容 到 目标class
/// </summary>
/// <param name="settingList">通常就是GlobalSetting.DefaultGlobalSettingArray, 配置项设置不合理时, 会将错误信息保存到ErrorMsg</param>
/// <param name="targetSettingClass">通常就是GlobalSetting</param>
/// <returns>成功, true; 失败: false</returns>
public static bool TryParseConfig(List<ConfigureItemModel> settingArray, Type targetSettingClass)
{
bool isAllSuccess = true;
foreach (var configureItem in settingArray)
{
configureItem.ErrorMsg = null;
configureItem.Value = string.IsNullOrWhiteSpace(configureItem.Value) ? "" : configureItem.Value.Trim();
if (configureItem.Value == "" && configureItem.CanBeEmpty == false)
{
configureItem.ErrorMsg += "该项值不能为空, 请手动填写该值;";
isAllSuccess = false;
continue;
}
var property = targetSettingClass.GetProperty(configureItem.Name);
//如果 targetSettingClass 没有对应的静态属性, 则跳过
if (property == null)
{
continue;
}
object value = null;
try
{
value = Convert.ChangeType(configureItem.Value, property.PropertyType);
property.SetValue(null, value, null);
}
catch
{
configureItem.ErrorMsg += configureItem.Value + "不能转换为" + property.PropertyType.Name + ", 请重新填写该值;";
isAllSuccess = false;
continue;
}
}
return isAllSuccess;
}
/// <summary>
/// 写入
/// </summary>
/// <param name="xmlFileName"></param>
/// <param name="settingList">通常就是GlobalSetting.DefaultGlobalSettingArray</param>
/// <returns>成功, null</returns>
public static bool TrySaveToXML(string xmlFileName, List<ConfigureItemModel> settingArray, out string msg)
{
msg = null;
var xdoc = GetXDocument(xmlFileName, out msg);//原文件读出错误, 忽略即可, 因为settingArray会自动填充
var singleSettingElement = xdoc.Root.Element("SingleSetting");
foreach (var configureItem in settingArray)
{
var element = singleSettingElement.Element(configureItem.Name);
if (element == null)
{
element = new XElement(configureItem.Name, configureItem.Value);
singleSettingElement.Add(element);
}
else
{
element.Value = configureItem.Value ?? "";
}
element.RemoveAttributes();
element.Add(new XAttribute("Caption", configureItem.Caption));
element.Add(new XAttribute("Description", configureItem.Description));
element.Add(new XAttribute("DefaultValue", configureItem.DefaultValue));
element.Add(new XAttribute("CanBeEmpty", configureItem.CanBeEmpty));
if (!string.IsNullOrWhiteSpace(configureItem.ErrorMsg))
{
element.Add(new XAttribute("ErrorMsg", configureItem.ErrorMsg));
}
}
var textContent = xdoc.ToString();
textContent = isEncrypt ? Encrypt(textContent) : textContent;
try
{
System.IO.File.WriteAllText(xmlFileName, textContent);
return true;
}
catch (Exception ex)
{
msg= "保存失败:" + ex.Message;
return false;
}
}
#region 加密解密部分
private static byte[] DESKey = new byte[] { 11, 69, 93, 102, 172, 41, 18, 12 };
private static byte[] DESIV = new byte[] { 75, 77, 46, 197, 78, 157, 23, 36 };
/// <summary>
/// 加密
/// </summary>
private static string Encrypt(string source)
{
string reValue = "";
DESCryptoServiceProvider objDes = new DESCryptoServiceProvider();
MemoryStream objMemoryStream = new MemoryStream();
CryptoStream objCrytoStream = new CryptoStream(objMemoryStream, objDes.CreateEncryptor(DESKey, DESIV), CryptoStreamMode.Write);
StreamWriter objStreamWriter = new StreamWriter(objCrytoStream);
objStreamWriter.Write(source);
objStreamWriter.Flush();
objCrytoStream.FlushFinalBlock();
objMemoryStream.Flush();
reValue = Convert.ToBase64String(objMemoryStream.GetBuffer(), 0, (int)objMemoryStream.Length);
return reValue;
}
/// <summary>
/// 解密
/// </summary>
private static string Decrypt(string source)
{
string reValue = "";
DESCryptoServiceProvider objDES = new DESCryptoServiceProvider();
byte[] Input = Convert.FromBase64String(source);
MemoryStream objMemoryStream = new MemoryStream(Input);
CryptoStream objCryptoStream = new CryptoStream(objMemoryStream, objDES.CreateDecryptor(DESKey, DESIV), CryptoStreamMode.Read);
StreamReader objStreamReader = new StreamReader(objCryptoStream);
reValue = objStreamReader.ReadToEnd();
return reValue;
}
#endregion
}
/// <summary>
/// 单个设置项
/// </summary>
/// <remarks>由于XML中不能保存null, 所以所有属性都不会被设置为null</remarks>
public class ConfigureItemModel
{
/// <summary>
/// 单个设置项
/// </summary>
/// <param name="captionParam">显示名称</param>
/// <param name="nameParam">参数名称</param>
/// <param name="defaultValueParam">默认值</param>
/// <param name="descriptionParam">描述, 该项不设定时候, 显示默认值</param>
/// <param name="canBeEmptyParam">能否为空字符串</param>
public ConfigureItemModel(string captionParam, string nameParam, string defaultValueParam, string descriptionParam = "", bool canBeEmptyParam = false)
{
Caption = captionParam;
Name = nameParam;
Description = descriptionParam;
DefaultValue = defaultValueParam;
CanBeEmpty = canBeEmptyParam;
}
private string caption = "";
/// <summary>
/// 显示名称
/// </summary>
public string Caption
{
get { return caption; }
set { caption = string.IsNullOrWhiteSpace(value) ? "" : value; }
}
private string name = "";
/// <summary>
/// 参数名称
/// </summary>
public string Name
{
get { return name; }
set { name = string.IsNullOrWhiteSpace(value) ? "" : value; ; }
}
private string description = "";
/// <summary>
/// 说明, 如果该值没有赋值, 则显示DefaultValue
/// </summary>
public string Description
{
get { return string.IsNullOrWhiteSpace(description) ? defaultValue : description; }
set { description = string.IsNullOrWhiteSpace(value) ? "" : value; }
}
private string defaultValue = "";
/// <summary>
/// 默认值
/// </summary>
public string DefaultValue
{
get { return defaultValue; }
set { defaultValue = string.IsNullOrWhiteSpace(value) ? "" : value; }
}
/// <summary>
/// 能否为空字符串
/// </summary>
public bool CanBeEmpty { get; set; }
/// <summary>
/// 能否为空字符串 的字符串形式
/// </summary>
public string CanBeEmptyString { get { return CanBeEmpty ? "是" : "否"; } }
private string innerValue = "";
/// <summary>
/// 值
/// </summary>
public string Value
{
get { return innerValue; }
set { innerValue = string.IsNullOrWhiteSpace(value) ? "" : value; ; }
}
private string errorMsg = "";
/// <summary>
/// 错误信息
/// </summary>
public string ErrorMsg
{
get { return errorMsg; }
set { errorMsg = string.IsNullOrWhiteSpace(value) ? "" : value; ; }
}
}
产品里建一个 GlobalSetting 类, 里面的配置项都必须是 static 属性, 然后加入 public static List<ConfigureItemModel> DefaultGlobalSettingArray 保存默认设置
/// <summary>
/// 全局设定
/// </summary>
/// <remarks>所有属性都必须是 static , 即 类属性</remarks>
public class GlobalSetting
{
public static List<ConfigureItemModel> DefaultGlobalSettingArray = new List<ConfigureItemModel>()
{
new ConfigureItemModel("数据库的主机地址","ConnectionStringHost", "127.0.0.1"),
};
/// <summary>
/// 数据库的主机地址
/// </summary>
public static string ConnectionStringHost { get; set; }
}
具体的示例请参考 ConfigSettingToolTest, 第一次运行时会报错: 升级地址 不能为空, 使用 配置文件编辑工具2.exe 为其赋值后, 就可以正常启动了
ConfigSettingToolTest ConfigEditer
来源：oschina
链接：https://my.oschina.net/u/4352408/blog/4026355