MVC中一个表单实现多个提交按钮(一个action搞定添删改)

默认情况下,一个表单只能有一个提交事件,这不难理解,但有时我们需要有多个实现,早在ASP时代就可以实现这个功能,难道到了MVC时代后,功能削减了?当然不是,这和MVC本身有关,微软在这方面比较提倡一个提交事件对应一个action,这和它自代的实例是相吻合的,而一个action可能会根据请求方式不同分为GET和POST两种,这样的设计确实很清晰,代码可能是这样

public ActionResult Index()
{
    if (current.HasUserInfo)
        Response.Write(current.UserInfo.UserName);
    else
        Response.Write("没?有Dcookies");
    return View();
}
[HttpPost]
public ActionResult Index(FormCollection form)
{
   ClientHelper.StandUserInfo(new ClientUserBase { UserName = "zzl", UserID = "1", Password = "123", Email = "bobo" });
    if (current.HasUserInfo)
        Response.Write(current.UserInfo.UserName);
    else
        Response.Write("没Dcookies");
    return View();
}
而如果我们非要将三个按钮集成到一个action上也不是没有可能,我们可以借助.net的特性(attribute)功能实现
 
public class MultiButtonAttribute : ActionNameSelectorAttribute
   {
       public string Name { get; set; }
       public MultiButtonAttribute(string name)
       {
           this.Name = name;
       }
       public override bool IsValidName(ControllerContext controllerContext,
           string actionName, System.Reflection.MethodInfo methodInfo)
       {
           if (string.IsNullOrEmpty(this.Name))
           {
               return false;
           }
           return controllerContext.HttpContext.Request.Form.AllKeys.Contains(this.Name);
       }
   }

而我们的Index方法会加上一个特性来实现多按钮提交的功能,代码如下

    [HttpPost]
       [MultiButton("write")]
       public ActionResult Index(FormCollection form)
       {
   ClientHelper.StandUserInfo(new ClientUserBase { UserName = "zzl", UserID = "1", Password = "123", Email = "bobo" });
           if (current.HasUserInfo)
               Response.Write(current.UserInfo.UserName);
           else
               Response.Write("没?有Dcookies");
           return View();
       }

       [HttpPost]
       [MultiButton("del")]
       public ActionResult Index(FormCollection form, int? a)
       {
           ClientHelper.UserLogout();
           if (current.HasUserInfo)
               Response.Write(current.UserInfo.UserName);
           else
               Response.Write("没?有Dcookies");
           return View();
       }

其中[MultiButton("del")] 这个特性中的del代表前台按钮的name,而不是ID,这点需要注意一下。

posted @ 2012-02-23 10:23  张占岭  阅读(5385)  评论(3编辑  收藏  举报