/// <summary>
/// 从配置文件中读取数据
/// </summary>
/// <param name="doc">配置文件</param>
/// <returns>配置数据</returns>
private static InjectionModel GetDataFromXml(XmlDocument doc)
{
var model = new InjectionModel();
foreach (XmlNode node in doc.DocumentElement.SelectSingleNode("modules").ChildNodes)
{
if (!(node is XmlComment))
{
var module = new InjectionModuleModel
{
Name = node.Attributes["name"]?.Value,
Assembly = node.Attributes["assembly"]?.Value,
Class = node.Attributes["class"]?.Value
};
if (string.IsNullOrWhiteSpace(module.Name))
{
//如果名称为空, 随便起一个名
module.Name = Guid.NewGuid().ToString();
}
foreach (XmlNode p_node in node.ChildNodes)
{
if (!(p_node is XmlComment))
{
var parameter = new InjectionParameterModel
{
Name = p_node.Attributes["name"]?.Value,
Ref = p_node.Attributes["ref"]?.Value,
Value = p_node.Attributes["value"]?.Value,
};
switch (p_node.Name)
{
case "constructor":
//构造参数
module.ConstructorList.Add(parameter);
break;
case "property":
//待注入属性
module.PropertyList.Add(parameter);
break;
default: break;
}
}
}
model.Modules.Add(module);
}
}
return(model);
}
/// <summary>
/// 实例化模块
/// </summary>
/// <param name="module">待注入模块信息</param>
/// <param name="parameters">模块实例化参数集合</param>
/// <returns>实例化模块对象</returns>
private static object InstantiationModule(InjectionModuleModel module, Dictionary <string, object> parameters)
{
var assembly = Assembly.Load(module.Assembly);
if (assembly == null)
{
throw new EntryPointNotFoundException($"{module.Name}模块加载异常",
new System.Exception("未找到指定的程序集"));
}
var type = assembly.GetType(module.Class);
if (type == null)
{
throw new EntryPointNotFoundException($"{module.Name}模块加载异常",
new System.Exception("未找到指定的模块"));
}
foreach (var constructor in
type.GetConstructors().Where(
constructor => constructor.GetParameters().Count() <= parameters.Count).OrderByDescending(
constructor => constructor.GetParameters().Count()))
{
var paramsList = new List <object>();
foreach (var parameter in constructor.GetParameters())
{
if (parameters.ContainsKey(parameter.Name))
{
if (parameter.ParameterType.IsInterface)
{
//接口直接注入
paramsList.Add(parameters[parameter.Name]);
}
else
{
//非接口参数要进行格式转换
paramsList.Add(parameters[parameter.Name].ToType(parameter.ParameterType));
}
}
else
{
//如果没有匹配成功, 查找下一个实例化方法
continue;
}
}
return(constructor.Invoke(paramsList.ToArray()));
}
throw new EntryPointNotFoundException($"{module.Name}模块加载异常",
new System.Exception("未找到匹配的构造函数"));
}
