是否有一些简单的方法可以处理来自同一表单的多个提交按钮?例:
<% Html.BeginForm("MyAction", "MyController", FormMethod.Post); %>
<input type="submit" value="Send" />
<input type="submit" value="Cancel" />
<% Html.EndForm(); %>
任何想法如何在 ASP.NET Framework Beta 中做到这一点?我搜索过的所有示例中都包含一个按钮。
在很大程度上基于Maarten Balliauw的帖子和评论,这是一个针对多个提交按钮问题的,基于属性的,最干净的解决方案。
[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public class MultipleButtonAttribute : ActionNameSelectorAttribute
{
public string Name { get; set; }
public string Argument { get; set; }
public override bool IsValidName(ControllerContext controllerContext, string actionName, MethodInfo methodInfo)
{
var isValidName = false;
var keyValue = string.Format("{0}:{1}", Name, Argument);
var value = controllerContext.Controller.ValueProvider.GetValue(keyValue);
if (value != null)
{
controllerContext.Controller.ControllerContext.RouteData.Values[Name] = Argument;
isValidName = true;
}
return isValidName;
}
}
剃刀:
<form action="" method="post">
<input type="submit" value="Save" name="action:Save" />
<input type="submit" value="Cancel" name="action:Cancel" />
</form>
和控制器:
[HttpPost]
[MultipleButton(Name = "action", Argument = "Save")]
public ActionResult Save(MessageModel mm) { ... }
[HttpPost]
[MultipleButton(Name = "action", Argument = "Cancel")]
public ActionResult Cancel(MessageModel mm) { ... }
更新: Razor 页面看起来可以提供相同的功能。对于新开发,它可能是更可取的。
给您的提交按钮命名,然后在控制器方法中检查提交的值:
<% Html.BeginForm("MyAction", "MyController", FormMethod.Post); %>
<input type="submit" name="submitButton" value="Send" />
<input type="submit" name="submitButton" value="Cancel" />
<% Html.EndForm(); %>
发布到
public class MyController : Controller {
public ActionResult MyAction(string submitButton) {
switch(submitButton) {
case "Send":
// delegate sending to another controller action
return(Send());
case "Cancel":
// call another action to perform the cancellation
return(Cancel());
default:
// If they've submitted the form without a submitButton,
// just return the view again.
return(View());
}
}
private ActionResult Cancel() {
// process the cancellation request here.
return(View("Cancelled"));
}
private ActionResult Send() {
// perform the actual send operation here.
return(View("SendConfirmed"));
}
}
编辑:
为了将这种方法扩展到本地化站点,请在其他地方隔离您的消息(例如,将资源文件编译为强类型的资源类)
然后修改代码,使其工作如下:
<% Html.BeginForm("MyAction", "MyController", FormMethod.Post); %>
<input type="submit" name="submitButton" value="<%= Html.Encode(Resources.Messages.Send)%>" />
<input type="submit" name="submitButton" value="<%=Html.Encode(Resources.Messages.Cancel)%>" />
<% Html.EndForm(); %>
并且您的控制器应如下所示:
// Note that the localized resources aren't constants, so
// we can't use a switch statement.
if (submitButton == Resources.Messages.Send) {
// delegate sending to another controller action
return(Send());
} else if (submitButton == Resources.Messages.Cancel) {
// call another action to perform the cancellation
return(Cancel());
}
您可以如上所述在操作中检查名称,但是您可能会考虑这是否是好的设计。最好考虑一下操作的责任,并且不要将此设计与按钮名称之类的 UI 方面过多耦合。因此,请考虑使用 2 种形式和 2 种动作:
<% Html.BeginForm("Send", "MyController", FormMethod.Post); %>
<input type="submit" name="button" value="Send" />
<% Html.EndForm(); %>
<% Html.BeginForm("Cancel", "MyController", FormMethod.Post); %>
<input type="submit" name="button" value="Cancel" />
<% Html.EndForm(); %>
同样,在 “取消” 的情况下,您通常只是不处理表单,而是转到新的 URL。在这种情况下,您根本不需要提交表单,只需一个链接:
<%=Html.ActionLink("Cancel", "List", "MyController") %>