我正在尝试调用方法输入扩展 http://msdn.microsoft.com/en-us/library/system.web.mvc.html.inputextensions.aspx静态类，以便为方法创建重载HtmlHelper class.
所以无论如何，我仍然无法调用InputExtensions班级。这是我用来执行此操作的部分代码：
Type inputExtensions = typeof(InputExtensions);
MethodInfo methodInfo = null;
MethodInfo genericMethod = null;
switch (propertyViewingMode.ViewingLevel)
{
case 1:
methodInfo = inputExtensions.GetMethod(methodName, new Type[] { typeof(HtmlHelper<TModel>), typeof(Expression<Func<TModel, TProperty>>), typeof(Object) });
genericMethod = methodInfo.MakeGenericMethod(typeof(TModel), typeof(TProperty));
result = genericMethod.Invoke(null, new object[] { helper, expression, new { @class = "readOnly", @readonly = "read-only" } }) as MvcHtmlString;
break;
case 2:
methodInfo = inputExtensions.GetMethod(methodName, new Type[] { typeof(HtmlHelper<TModel>), typeof(Expression<Func<TModel, TProperty>>) });
genericMethod = methodInfo.MakeGenericMethod(typeof(TModel), typeof(TProperty));
result = genericMethod.Invoke(null, new object[] { helper, expression }) as MvcHtmlString;
break;
default:
result = new MvcHtmlString(String.Empty);
break;
}
问题是methodInfo始终为空，这意味着Type.GetMethod没有找到我试图调用的方法。
UPDATE:请注意，当我不提供GetMethod方法与Type[]array，它抛出一个异常，告诉我调用不明确。
更新2：这是我试图调用的方法：
TextBoxFor<TModel, TProperty>(HtmlHelper<TModel>, Expression<Func<TModel, TProperty>>, Object)
ANSWER:
Type inputExtensions = typeof(InputExtensions);
IEnumerable<MethodInfo> methods = null;
MethodInfo genericMethod = null;
MethodInfo methodInfo = null;
switch (propertyViewingMode.ViewingLevel)
{
case 1:
methods = inputExtensions.GetMethods().Where(m => m.IsGenericMethod && m.Name.Equals(methodName))
.Where(x => x.GetParameters().Count() == 3);
methodInfo = methods.FirstOrDefault(x => x.GetParameters()[2].ParameterType.FullName == "System.Object");
if (methodInfo != null)
{
genericMethod = methodInfo.MakeGenericMethod(new[] { typeof(TModel), typeof(TProperty) });
result = genericMethod.Invoke(null, new object[] { helper, expression, new { @class = "readOnly", @readonly = "read-only" } }) as MvcHtmlString;
}
break;
case 2:
methods = inputExtensions.GetMethods().Where(m => m.IsGenericMethod && m.Name.Equals(methodName))
.Where(x => x.GetParameters().Count() == 2);
methodInfo = methods.FirstOrDefault();
if (methodInfo != null)
{
genericMethod = methodInfo.MakeGenericMethod(new[] { typeof(TModel), typeof(TProperty) });
result = genericMethod.Invoke(null, new object[] { helper, expression }) as MvcHtmlString;
}
break;
default:
result = new MvcHtmlString(String.Empty);
break;
}
