解决歧义 [英] Resolving ambiguity

问题描述

我有3重载控制器的创建方法：

I have a controller with 3 overloads for a create method:

public ActionResult Create() {}
public ActionResult Create(string Skill, int ProductId) {}
public ActionResult Create(Skill Skill, Component Comp) {}

在我的意见就是我想要创建这个事情，所以我把它称为是这样的：

in one of my views I want to create this thing so I call it like this:

<div id="X">
@Html.Action("Create")
</div>

但我得到的错误：

but I get the error:

{行动创建当前请求的控制器类型
'XController'不明确下面的操作方法之间：
System.Web.Mvc.ActionResult的Create（）上类型
X.Web.Controllers.XController System.Web.Mvc.ActionResult
型上X.Web.Controllers.XController
System.Web.Mvc创建（System.String，的Int32）。的ActionResult创建（X.Web.Models.Skill，
X.Web.Models.Component）的类型X.Web.Controllers.XController}

{"The current request for action 'Create' on controller type 'XController' is ambiguous between the following action methods: System.Web.Mvc.ActionResult Create() on type X.Web.Controllers.XController System.Web.Mvc.ActionResult Create(System.String, Int32) on type X.Web.Controllers.XController System.Web.Mvc.ActionResult Create(X.Web.Models.Skill, X.Web.Models.Component) on type X.Web.Controllers.XController"}

但由于 @ html.Action（）被传递任何参数，应使用第一个重载。它似乎并不含糊，我（这只是意味着我不认为像C＃编译器）。

but since the @html.Action() is passing no parameters, the first overload should be used. It doesn't seem ambiguous to me (which only means I don't think like a c# compiler).

任何人都可以指出我的方式错误？

can anyone point out the error of my ways?

推荐答案

默认情况下，重载方法在ASP.NET MVC中不被支持。你必须使用不同的行动或可选参数。例如：

By default, overloading methods is not supported in ASP.NET MVC. You have to use difference actions or optional parameters. For example:

public ActionResult Create() {}
public ActionResult Create(string Skill, int ProductId) {}
public ActionResult Create(Skill Skill, Component Comp) {}

将变为：

// [HttpGet] by default
public ActionResult Create() {}

[HttpPost]
public ActionResult Create(Skill skill, Component comp, string strSkill, int? productId) {
    if(skill == null && comp == null 
        && !string.IsNullOrWhiteSpace(strSkill) && productId.HasValue)
        // do something...
    else if(skill != null && comp != null
        && string.IsNullOrWhiteSpace(strSkill) && !productId.HasValue)
        // do something else
    else
        // do the default action
}

或

// [HttpGet] by default
public ActionResult Create() {}

[HttpPost]
public ActionResult Create(string Skill, int ProductId) {}

[HttpPost]
public ActionResult CreateAnother(Skill Skill, Component Comp) {}

或

public ActionResult Create() {}
[ActionName("CreateById")]
public ActionResult Create(string Skill, int ProductId) {}
[ActionName("CreateByObj")]
public ActionResult Create(Skill Skill, Component Comp) {}

的又见这个Q&安培; A

这篇关于解决歧义的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！