多个提交按钮在MVC3 - 的FormCollection有输入型提交任何键/值 - 远程验证问题？ [英] Multiple Submit Buttons in MVC3 - FormCollection has no Key/Value for Input Type Submit - Remote Validation Issue?

问题描述

我在MVC3应用程序中的两个按钮。

 ＆LT;输入类型=提交名称=命令值=交易/＆GT; ＆安培; NBSP;
   ＆LT;输入类型=提交名称=命令值=所有交易/＆GT;
 

当我点击一个按钮，这回发正确，但的FormCollection没有命令键。我在模型中还加了属性命令，当窗体发布其值为null。

 公众的ActionResult指数（的FormCollection的FormCollection，SearchReportsModel searchReportsModel）。 {
            如果（searchReportsModel.command ==所有交易）
              ...
            其他
              ....
        }
 

我使用IE8。我如何使用MVC3多个按钮？是否有针对此问题的解决方法吗？我做了很多研究，但没有找到一个解决方案。结果
更新：

戴夫：我想你的解决方案，它抛出HTTP 404错误资源无法找到

下面是我的code：

  [HttpPost]
[AcceptSubmitType（NAME =命令，类型=​​交易）]
公众的ActionResult指数（SearchReportsModel searchReportsModel）
{
    返回RedirectToAction（交易，报告，新{...}）;
}[HttpPost]
[ActionName（指数）]
[AcceptSubmitType（NAME =命令，类型=​​所有交易）]
公众的ActionResult Index_All（SearchReportsModel searchReportsModel）
{
   返回RedirectToAction（AllTransactions，报告，新{...}）;
}公共类AcceptSubmitTypeAttribute：ActionMethodSelectorAttribute
    {
        公共字符串名称{;组; }
        公共字符串类型{搞定;组; }        公众覆盖布尔IsValidForRequest（ControllerContext controllerContext，MethodInfo的MethodInfo的）
        {
            返回controllerContext.RequestContext.HttpContext
                .Request.Form [this.Name] == this.Type;
        }
    }
 

问题是在视图模型（SearchReportsModel）评论下面远程验证属性之后解决。它看起来像它在MVC3了一个错误：

  // [远程（CheckStudentNumber，SearchReports的ErrorMessage =没有记录该学生数存在）]
  公众诠释？ StudentNumber {搞定;组; }
 

解决方案

您也许可以用 ActionMethodSelectorAttribute 的属性并覆盖IsValidForRequest方法。你可以看到下面这个方法只是确定特定参数（名称）是否符合它的一个特性（类型）。它应该看起来像这样的视图模型绑定：

 公共类TestViewModel
{
    公共字符串命令{搞定;组; }
    公共字符串moreProperties {搞定;组; }
}
 

属性看起来是这样的：

 公共类AcceptSubmitTypeAttribute：ActionMethodSelectorAttribute
{
    公共字符串名称{;组; }
    公共字符串类型{搞定;组; }    公众覆盖布尔IsValidForRequest（ControllerContext controllerContext，MethodInfo的MethodInfo的）
    {
        返回controllerContext.RequestContext.HttpContext
            .Request.Form [this.Name] == this.Type;
    }
}
 

然后，您可以标记像这样的 AcceptSubmitType 属性，你的行动：

  [AcceptSubmitType（NAME =命令，类型=​​交易）]
公众的ActionResult指数（TestViewModel VM）
{
    //使用视图模型做什么
}//为伪重写指数行动
[ActionName（指数）]
[AcceptSubmitType（NAME =命令，类型=​​所有交易）]
公众的ActionResult Index_All（TestViewModel VM）
{
    //使用视图模型做什么
}
 

这也消除了单个控制器的动作需要逻辑，因为它似乎是你真正需要行动的两个独立的课程。

I have the two buttons in MVC3 application.

   <input type="submit" name="command" value="Transactions" />  &nbsp;
   <input type="submit" name="command" value="All Transactions" />

When I click on a button, it posts back correctly but the FormCollection has no "command" keys. I also added a property "command" in the model and its value is null when the form is posted.

public ActionResult Index(FormCollection formCollection, SearchReportsModel searchReportsModel).         {
            if (searchReportsModel.command == "All Transactions")
              ...
            else
              ....
        }

I am using IE8. How can I use multiple buttons in MVC3? Is there a workaround for this issue? I did lot of research and could not find a solution.
Update:

Dave: I tried your solution and it is throwing Http 404 error "The resource cannot be found".

Here is my code:

[HttpPost]
[AcceptSubmitType(Name = "Command", Type = "Transactions")]
public ActionResult Index(SearchReportsModel searchReportsModel)
{
    return RedirectToAction("Transactions", "Reports", new { ...});
}

[HttpPost]
[ActionName("Index")]
[AcceptSubmitType(Name = "Command", Type = "All Transactions")]
public ActionResult Index_All(SearchReportsModel searchReportsModel)
{
   return RedirectToAction("AllTransactions", "Reports", new { ... });
}

public class AcceptSubmitTypeAttribute : ActionMethodSelectorAttribute
    {
        public string Name { get; set; }
        public string Type { get; set; }

        public override bool IsValidForRequest(ControllerContext controllerContext, MethodInfo methodInfo)
        {
            return controllerContext.RequestContext.HttpContext
                .Request.Form[this.Name] == this.Type;
        }
    }

The issue was resolved after commenting the following Remote validation attribute in the ViewModel (SearchReportsModel). It looks like it is a bug in MVC3:

  //[Remote("CheckStudentNumber", "SearchReports", ErrorMessage = "No records exist for this Student Number")]
  public int? StudentNumber { get; set; }

解决方案

You might be able to get away with an ActionMethodSelectorAttribute attribute and override the IsValidForRequest method. You can see below this method just determines whether a particular parameter (Name) matches one of it's properties (Type). It should bind with a view model that looks like this:

public class TestViewModel
{
    public string command { get; set; }
    public string moreProperties { get; set; }
}

The attribute could look like this:

public class AcceptSubmitTypeAttribute : ActionMethodSelectorAttribute
{
    public string Name { get; set; }
    public string Type { get; set; }

    public override bool IsValidForRequest(ControllerContext controllerContext, MethodInfo methodInfo)
    {
        return controllerContext.RequestContext.HttpContext
            .Request.Form[this.Name] == this.Type;
    }
}

Then, you could tag your actions with the AcceptSubmitType attribute like this:

[AcceptSubmitType(Name="command", Type="Transactions")]
public ActionResult Index(TestViewModel vm) 
{
    // use view model to do whatever
}

// to pseudo-override the "Index" action
[ActionName("Index")]
[AcceptSubmitType(Name="command", Type="All Transactions")]
public ActionResult Index_All(TestViewModel vm) 
{
    // use view model to do whatever
}

This also eliminates the need for logic in a single controller action since it seems you genuinely need two separate courses of action.

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