asp.net-mvc 将动作方法参数传递给 asp.net mvc 中的 ActionFilterAttribute

passing action method parameter to ActionFilterAttribute in asp.net mvc

提问by cs0815

I know that I can use the filterContext to get to it. However, this is not very flexible if the action method parameter is named differently. This should work:

我知道我可以使用 filterContext 来获得它。但是，如果操作方法参数的名称不同，这不是很灵活。这应该有效：

[HttpGet]
[NewAuthoriseAttribute(SomeId = id)]
public ActionResult Index(int id)
{
    ...

public class NewActionFilterAttribute : ActionFilterAttribute
{   
    public int SomeId { get; set; }
    ...

but it does not (it does not even compile). Any ideas?

但它没有（它甚至不编译）。有任何想法吗？

回答by Jasen

Building on the answer from @Pankaj and comments from @csetzkorn:

基于@Pankaj 的回答和@csetzkorn 的评论：

You pass the name of the parameter as a string then check the filterContext

您将参数的名称作为字符串传递，然后检查 filterContext

public class NewAuthoriseAttribute : ActionFilterAttribute
{
    public string IdParamName { get; set; }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (filterContext.ActionParameters.ContainsKey(IdParamName))
        {
            var id = filterContext.ActionParameters[IdParamName] as Int32?;
        }
    }
}

[NewAuthorizeAttribute(IdParamName = "fooId")]
public ActionResult Index(int fooId)
{ ... }

回答by cs0815

Edit

编辑

I am assuming that you are looking to make the Alias of Parameter name. This is giving you the flexibility to have multiple Alias of your paramater Name.

我假设您正在寻找参数名称的别名。这使您可以灵活地使用参数名称的多个别名。

ActionParameterAlias.ParameterAlias Overloads

ActionParameterAlias.ParameterAlias 重载

If so, you can give alias like below.

如果是这样，您可以提供如下别名。

[ParameterAlias("Original_Parameter_Name", 
                 "New_Parameter_Name")]
[ParameterAlias("Original_Parameter_Name", 
                 "New_Parameter_Name1")]
[ParameterAlias("Original_Parameter_Name", 
                 "New_Parameter_Name2")]
[ParameterAlias("Original_Parameter_Name", 
                 "New_Parameter_Name3")]

public ActionResult ActionMethod(Model ParameterValue) { return View(ParameterValue); }

公共动作结果动作方法（模型参数值）{ 返回视图（参数值）；}

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Original Post

原帖

Try this one.

试试这个。

Attribute

属性

public class NewAuthoriseAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (filterContext.ActionParameters.ContainsKey("id"))
        {
            var id = filterContext.ActionParameters["id"] as Int32?;
        }
    }
}

Action Method

动作方法

Make sure to set the Parameter type nullable to avoid RunTime Crash.

确保将参数类型设置为可为空以避免运行时崩溃。

[NewAuthoriseAttribute]
public ActionResult Index(Int32? id)
{
}