是否有一些简单的方法来处理来自同一个表单的多个提交按钮?例如:
<% Html.BeginForm("MyAction", "MyController", FormMethod.Post); %>
<input type="submit" value="Send" />
<input type="submit" value="Cancel" />
<% Html.EndForm(); %>
知道如何在ASP中做到这一点吗?NET框架测试版?我在谷歌上搜索的所有例子中都有单个按钮。
是否有一些简单的方法来处理来自同一个表单的多个提交按钮?例如:
<% Html.BeginForm("MyAction", "MyController", FormMethod.Post); %>
<input type="submit" value="Send" />
<input type="submit" value="Cancel" />
<% Html.EndForm(); %>
知道如何在ASP中做到这一点吗?NET框架测试版?我在谷歌上搜索的所有例子中都有单个按钮。
当前回答
我已经为HtmlHelper创建了一个ActionButton方法。它将在OnClick事件中生成带有javascript的普通输入按钮,将表单提交给指定的控制器/动作。
像这样使用辅助器
@Html.ActionButton("MyControllerName", "MyActionName", "button text")
这将生成以下HTML
<input type="button" value="button text" onclick="this.form.action = '/MyWebsiteFolder/MyControllerName/MyActionName'; this.form.submit();">
下面是扩展方法代码:
VB。网
<System.Runtime.CompilerServices.Extension()>
Function ActionButton(pHtml As HtmlHelper, pAction As String, pController As String, pRouteValues As Object, pBtnValue As String, pBtnName As String, pBtnID As String) As MvcHtmlString
Dim urlHelperForActionLink As UrlHelper
Dim btnTagBuilder As TagBuilder
Dim actionLink As String
Dim onClickEventJavascript As String
urlHelperForActionLink = New UrlHelper(pHtml.ViewContext.RequestContext)
If pController <> "" Then
actionLink = urlHelperForActionLink.Action(pAction, pController, pRouteValues)
Else
actionLink = urlHelperForActionLink.Action(pAction, pRouteValues)
End If
onClickEventJavascript = "this.form.action = '" & actionLink & "'; this.form.submit();"
btnTagBuilder = New TagBuilder("input")
btnTagBuilder.MergeAttribute("type", "button")
btnTagBuilder.MergeAttribute("onClick", onClickEventJavascript)
If pBtnValue <> "" Then btnTagBuilder.MergeAttribute("value", pBtnValue)
If pBtnName <> "" Then btnTagBuilder.MergeAttribute("name", pBtnName)
If pBtnID <> "" Then btnTagBuilder.MergeAttribute("id", pBtnID)
Return MvcHtmlString.Create(btnTagBuilder.ToString(TagRenderMode.Normal))
End Function
c# (c#代码只是从VB DLL中反编译的,所以它可以得到一些美化…但是时间太短了:-)
public static MvcHtmlString ActionButton(this HtmlHelper pHtml, string pAction, string pController, object pRouteValues, string pBtnValue, string pBtnName, string pBtnID)
{
UrlHelper urlHelperForActionLink = new UrlHelper(pHtml.ViewContext.RequestContext);
bool flag = Operators.CompareString(pController, "", true) != 0;
string actionLink;
if (flag)
{
actionLink = urlHelperForActionLink.Action(pAction, pController, System.Runtime.CompilerServices.RuntimeHelpers.GetObjectValue(pRouteValues));
}
else
{
actionLink = urlHelperForActionLink.Action(pAction, System.Runtime.CompilerServices.RuntimeHelpers.GetObjectValue(pRouteValues));
}
string onClickEventJavascript = "this.form.action = '" + actionLink + "'; this.form.submit();";
TagBuilder btnTagBuilder = new TagBuilder("input");
btnTagBuilder.MergeAttribute("type", "button");
btnTagBuilder.MergeAttribute("onClick", onClickEventJavascript);
flag = (Operators.CompareString(pBtnValue, "", true) != 0);
if (flag)
{
btnTagBuilder.MergeAttribute("value", pBtnValue);
}
flag = (Operators.CompareString(pBtnName, "", true) != 0);
if (flag)
{
btnTagBuilder.MergeAttribute("name", pBtnName);
}
flag = (Operators.CompareString(pBtnID, "", true) != 0);
if (flag)
{
btnTagBuilder.MergeAttribute("id", pBtnID);
}
return MvcHtmlString.Create(btnTagBuilder.ToString(TagRenderMode.Normal));
}
这些方法具有各种参数,但是为了便于使用,您可以创建一些重载,只使用所需的参数。
其他回答
下面是我写的一个扩展方法来处理多个图像和/或文本按钮。
下面是一个图片按钮的HTML:
<input id="btnJoin" name="Join" src="/content/images/buttons/btnJoin.png"
type="image">
或者对于文本提交按钮:
<input type="submit" class="ui-button green" name="Submit_Join" value="Add to cart" />
<input type="submit" class="ui-button red" name="Submit_Skip" value="Not today" />
下面是使用form.GetSubmitButtonName()从控制器调用的扩展方法。对于图像按钮,它查找带有.x的表单参数(表示单击了图像按钮)并提取名称。对于常规输入按钮,它查找以Submit_开头的名称并从中提取命令。因为我抽象了确定“命令”的逻辑,所以你可以在客户端上切换图像+文本按钮,而无需更改服务器端代码。
public static class FormCollectionExtensions
{
public static string GetSubmitButtonName(this FormCollection formCollection)
{
return GetSubmitButtonName(formCollection, true);
}
public static string GetSubmitButtonName(this FormCollection formCollection, bool throwOnError)
{
var imageButton = formCollection.Keys.OfType<string>().Where(x => x.EndsWith(".x")).SingleOrDefault();
var textButton = formCollection.Keys.OfType<string>().Where(x => x.StartsWith("Submit_")).SingleOrDefault();
if (textButton != null)
{
return textButton.Substring("Submit_".Length);
}
// we got something like AddToCart.x
if (imageButton != null)
{
return imageButton.Substring(0, imageButton.Length - 2);
}
if (throwOnError)
{
throw new ApplicationException("No button found");
}
else
{
return null;
}
}
}
注意:对于文本按钮,必须在名称前加上Submit_。我更喜欢这种方式,因为这意味着您可以更改文本(显示)值,而不必更改代码。与SELECT元素不同,INPUT按钮只有一个“value”,没有单独的“text”属性。我的按钮在不同的上下文中表示不同的内容-但映射到相同的“命令”。我更喜欢以这种方式提取名称,而不是必须为==“Add to cart”编码。
你可以这样写:
<% Html.BeginForm("MyAction", "MyController", FormMethod.Post); %>
<input type="submit" name="button" value="Send" />
<input type="submit" name="button" value="Cancel" />
<% Html.EndForm(); %>
然后在页面中检查name == "Send"或者name == "Cancel"…
我的JQuery方法使用扩展方法:
public static MvcHtmlString SubmitButtonFor<TController>(this HtmlHelper helper, Expression<Action<TController>> action, string value) where TController : Controller
{
RouteValueDictionary routingValues = Microsoft.Web.Mvc.Internal.ExpressionHelper.GetRouteValuesFromExpression(action);
var onclick = string.Format("$('form').first().attr('action', '/{0}')", string.Join("/", routingValues.Values.ToArray().Where(x => x != null).Select(x => x.ToString()).ToArray()));
var html = "<input type=\"submit\" value=\"" + value + "\" onclick=\"" + onclick + "\" />";
return MvcHtmlString.Create(html);
}
你可以这样使用它:
@(Html.SubmitButtonFor<FooController>(c => c.Save(null), "Save"))
它是这样渲染的:
<input type="submit" value="Save" onclick="$('form').first().attr('action', '/Foo/Save')" >
下面是基于Maarten Balliauw的帖子和评论,针对多个提交按钮问题的一个非常干净的基于属性的解决方案。
[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;
}
}
剃须刀:
<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页面提供相同的功能开箱即用。对于新的开发来说,它可能更可取。
我不喜欢ActionSelectName的地方是IsValidName被控制器中的每个动作方法调用;我不知道为什么会这样。我喜欢一种解决方案,每个按钮都有一个不同的名称,基于它的功能,但我不喜欢这样的事实,你必须有许多参数在动作方法中的按钮在表单。我已经为所有按钮类型创建了一个枚举:
public enum ButtonType
{
Submit,
Cancel,
Delete
}
而不是ActionSelectName,我使用ActionFilter:
public class MultipleButtonsEnumAttribute : ActionFilterAttribute
{
public Type EnumType { get; set; }
public MultipleButtonsEnumAttribute(Type enumType)
{
EnumType = enumType;
}
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
foreach (var key in filterContext.HttpContext.Request.Form.AllKeys)
{
if (Enum.IsDefined(EnumType, key))
{
var pDesc = filterContext.ActionDescriptor.GetParameters()
.FirstOrDefault(x => x.ParameterType == EnumType);
filterContext.ActionParameters[pDesc.ParameterName] = Enum.Parse(EnumType, key);
break;
}
}
}
}
过滤器将在表单数据中找到按钮名称,如果按钮名称与枚举中定义的任何按钮类型匹配,它将在动作参数中找到ButtonType参数:
[MultipleButtonsEnumAttribute(typeof(ButtonType))]
public ActionResult Manage(ButtonType buttonPressed, ManageViewModel model)
{
if (button == ButtonType.Cancel)
{
return RedirectToAction("Index", "Home");
}
//and so on
return View(model)
}
然后在视图中,我可以使用:
<input type="submit" value="Button Cancel" name="@ButtonType.Cancel" />
<input type="submit" value="Button Submit" name="@ButtonType.Submit" />