一起谈.NET技术，ASP.NET MVC中实现多个按钮提交的几种方法

[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;
}