ASP.NET MVC中实现多个按钮提交的几种方法
有时候会遇到这种情况:在一个表单上需要多个按钮来完成不同的功能,比如一个简单的审批功能。
如果是用webform那不需要讨论,但asp.net mvc中一个表单只能提交到一个Action处理,相对比较麻烦点。
方法一:使用客户端脚本
比如我们在View中这样写:
![](https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif)
<inputtype="submit"value="审核通过"onclick='this.form.action="<%=Url.Action("Action1")%>/>
<inputtype="submit"value="审核不通过"onclick='this.form.action="<%=Url.Action("Action2")%> />
<inputtype="submit"value="返回"onclick='this.form.action="<%=Url.Action("Action3")%>" />
<inputtype="submit"value="审核不通过"onclick='this.form.action="<%=Url.Action("Action2")%> />
<inputtype="submit"value="返回"onclick='this.form.action="<%=Url.Action("Action3")%>" />
在点击提交按钮时,先改变Form的action属性,使表单提交到按钮相应的action处理。
但有的时候,可能Action1和2的逻辑非常类似,也许只是将某个字段的值置为1或者0,那么分开到二个action中又显得有点多余了。
方法二:在Action中判断通过哪个按钮提交
在View中,我们不用任何客户端脚本处理,给每个提交按钮加好name属性:
<input type="submit" value="审核通过" name="action" />
<input type="submit" value="审核不通过" name="action"/>
<input type="submit" value="返回" name="action"/>
<input type="submit" value="审核不通过" name="action"/>
<input type="submit" value="返回" name="action"/>
然后在控制器中判断:
![](https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif)
[HttpPost]
public ActionResult Index(string action /* 其它参数*/)
{
if (action=="审核通过")
{
//
}
else if (action=="审核不通过")
{
//
}
else
{
//
}
}
public ActionResult Index(string action /* 其它参数*/)
{
if (action=="审核通过")
{
//
}
else if (action=="审核不通过")
{
//
}
else
{
//
}
}
几年前写asp代码的时候经常用这样的方法…
View变得简单的,Controller复杂了。
太依赖说View,会存在一些问题。假若哪天客户说按钮上的文字改为“通过审核”,或者是做个多语言版的,那就麻烦了。
参考:http://www.ervinter.com/2009/09/25/asp-net-mvc-how-to-have-multiple-submit-button-in-form/
方法三:使用ActionSelector
关于ActionSelector的基本原理可以先看下这个POST使用ActionSelector控制Action的选择。
使用此方法,我们可以将控制器写成这样:
[HttpPost]
[MultiButton("action1")]
public ActionResult Action1()
{
//
return View();
}
[HttpPost]
[MultiButton("action2")]
public ActionResult Action2()
{
//
return View();
}
[MultiButton("action1")]
public ActionResult Action1()
{
//
return View();
}
[HttpPost]
[MultiButton("action2")]
public ActionResult Action2()
{
//
return View();
}
在 View中:
<input type="submit" value="审核通过" name="action1" />
<input type="submit" value="审核不通过" name="action2"/>
<input type="submit" value="返回" name="action3"/>
<input type="submit" value="审核不通过" name="action2"/>
<input type="submit" value="返回" name="action3"/>
此时,Controller已经无须依赖于按钮的Value值。
MultiButtonAttribute的定义如下:
![](https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif)
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);
}
}
{
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);
}
}
方法四、改进
Thomas Eyde就方法三的方案给出了个改进版:
Controller:
[HttpPost]
[MultiButton(Name = "delete", Argument = "id")]
public ActionResult Delete(string id)
{
var response = System.Web.HttpContext.Current.Response;
response.Write("Delete action was invoked with " + id);
return View();
}
[MultiButton(Name = "delete", Argument = "id")]
public ActionResult Delete(string id)
{
var response = System.Web.HttpContext.Current.Response;
response.Write("Delete action was invoked with " + id);
return View();
}
View:
<input type="submit" value="not important" name="delete" />
<input type="submit" value="not important" name="delete:id" />
<input type="submit" value="not important" name="delete:id" />
MultiButtonAttribute定义:
![](https://images.cnblogs.com/OutliningIndicators/ExpandedBlockStart.gif)
[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public class MultiButtonAttribute : ActionNameSelectorAttribute
{
public string Name { get; set; }
public string Argument { get; set; }
public override bool IsValidName(ControllerContext controllerContext, string
actionName, MethodInfo methodInfo)
{
var key = ButtonKeyFrom(controllerContext);
var keyIsValid = IsValid(key);
if (keyIsValid)
{
UpdateValueProviderIn(controllerContext, ValueFrom(key));
}
return keyIsValid;
}
private string ButtonKeyFrom(ControllerContext controllerContext)
{
var keys = controllerContext.HttpContext.Request.Params.AllKeys;
return keys.FirstOrDefault(KeyStartsWithButtonName);
}
private static bool IsValid(string key)
{
return key != null;
}
private static string ValueFrom(string key)
{
var parts = key.Split(":".ToCharArray());
return parts.Length < 2 ? null : parts[1];
}
private void UpdateValueProviderIn(ControllerContext controllerContext,
string value)
{
if (string.IsNullOrEmpty(Argument)) return;
controllerContext.Controller.ValueProvider[Argument] = new ValueProviderResult
(value, value, null);
}
private bool KeyStartsWithButtonName(string key)
{
return key.StartsWith(Name, StringComparison.InvariantCultureIgnoreCase);
}
}
//如果是在MVC 2.0中的话,将UpdateValueProviderIn方法改为:
private void UpdateValueProviderIn(ControllerContext controllerContext, string value)
{
if (string.IsNullOrEmpty(Argument))
return;
controllerContext.RouteData.Values[this.Argument] = value;
}
public class MultiButtonAttribute : ActionNameSelectorAttribute
{
public string Name { get; set; }
public string Argument { get; set; }
public override bool IsValidName(ControllerContext controllerContext, string
actionName, MethodInfo methodInfo)
{
var key = ButtonKeyFrom(controllerContext);
var keyIsValid = IsValid(key);
if (keyIsValid)
{
UpdateValueProviderIn(controllerContext, ValueFrom(key));
}
return keyIsValid;
}
private string ButtonKeyFrom(ControllerContext controllerContext)
{
var keys = controllerContext.HttpContext.Request.Params.AllKeys;
return keys.FirstOrDefault(KeyStartsWithButtonName);
}
private static bool IsValid(string key)
{
return key != null;
}
private static string ValueFrom(string key)
{
var parts = key.Split(":".ToCharArray());
return parts.Length < 2 ? null : parts[1];
}
private void UpdateValueProviderIn(ControllerContext controllerContext,
string value)
{
if (string.IsNullOrEmpty(Argument)) return;
controllerContext.Controller.ValueProvider[Argument] = new ValueProviderResult
(value, value, null);
}
private bool KeyStartsWithButtonName(string key)
{
return key.StartsWith(Name, StringComparison.InvariantCultureIgnoreCase);
}
}
//如果是在MVC 2.0中的话,将UpdateValueProviderIn方法改为:
private void UpdateValueProviderIn(ControllerContext controllerContext, string value)
{
if (string.IsNullOrEmpty(Argument))
return;
controllerContext.RouteData.Values[this.Argument] = value;
}
原文出自:http://kb.cnblogs.com/page/56074/