/// <summary>
/// 要执行的方法，根据方法名、参数数量
/// </summary>
/// <param name="type">要调用的对象的类型</param>
/// <param name="p"></param>
/// <returns></returns>
private static MethodInfo getMethod(Type type, Letter p)
{
//1、先判断方法是否存在
List <MethodInfo> methods = new List <MethodInfo>();
foreach (MethodInfo mi in type.GetMethods())
{
if (p.MethodName.Equals(mi.Name, StringComparison.CurrentCultureIgnoreCase))
{
methods.Add(mi);
}
}
if (methods.Count < 1)
{
throw new Exception(string.Format("调用方法'{0}.{1}'不存在", p.ClassName, p.MethodName));
}
//2、判断方法的参数名称，是否与传递来的参数名称匹配，参数数量必须匹配
//只有一个参数，且类型是Letter
MethodInfo mbLetter = null;
for (int i = 0; i < methods.Count; i++)
{
ParameterInfo[] pis = methods[i].GetParameters();
if (pis.Length == 1 && p.GetType().FullName.Equals(pis[0].ParameterType.FullName))
{
mbLetter = methods[i];
methods.Remove(methods[i]);
break;
}
}
MethodInfo method = null;
foreach (MethodInfo mi in methods)
{
//2-1、判断参数个数是否相同
int paraCount = 0;
foreach (ParameterInfo pi in mi.GetParameters())
{
if (!pi.IsOut)
{
paraCount++;
}
}
//方法的参数个数，和传参的参数个数，必须相等
if (paraCount == p.Params.Count)
{
method = mi;
break;
}
}
//2-2、判断参数名称与传递来的参数名称是否一致
if (method != null)
{
bool ismatch = true; //是否匹配
foreach (ParameterInfo pi in method.GetParameters())
{
//如果参数是Parameter类型，则跳过匹配
if (p.GetType().FullName.Equals(pi.ParameterType.FullName))
{
continue;
}
//只要有一个参数不匹配，即中断
if (!p.ExistParameter(pi.Name))
{
ismatch = false;
break;
}
}
if (!ismatch)
{
method = null;
}
}
if (method == null)
{
method = mbLetter;
}
if (method == null)
{
throw new Exception(
string.Format("所调用方法'{0}.{1}'的参数名称与实际传参不匹配；实际传参：{2}",
type.FullName, p.MethodName,
p.ToString() == string.Empty ? "null" : p.ToString()));
}
return(method);
}
