<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")%>" />

<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"/>

[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
  {
   //
  }
 }

[HttpPost]
[MultiButton("action1")]
public ActionResult Action1()
{
 //
 return View();
}
[HttpPost]
[MultiButton("action2")]
public ActionResult Action2()
{
 //
 return View();
}

<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"/>

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);
 }
}

[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(); 
} 

<input type="submit" value="not important" name="delete" />
<input type="submit" value="not important" name="delete:id" />

[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;
}