如何提交带有隐藏字段的表单?

Say I have the following form that's in classic asp:

假设我有一个经典的asp:

<form name="impdata" id="impdata" method="POST" action="http://www.bob.com/dologin.asp">
<input type="hidden" value="" id="txtName" name="txtName" />
</form>

I need to simulate the action of submitting the form in asp.net mvc3, but I need to modify the hidden value before submitting. Is it possible to do this from the action or in another way?

我需要在asp.net mvc3中模拟提交表单的动作，但是我需要在提交之前修改隐藏值。是否有可能从行动或其他方式来做?

What I have so far...

到目前为止我拥有的……

View:

观点:

@using (Html.BeginForm("Impersonate", "Index", FormMethod.Post, new { id = "impersonateForm" }))
{                       
    <input id="Impersonate" class="button" type="submit" value="Impersonate" action />
    <input type="hidden" value="" id="txtName" name="txtName" />
}

Controller:

控制器:

[HttpPost]
public ActionResult Impersonate(string txtName)
{
txtName = txtName + "this string needs to be modified and then submitted as a hidden field";  
//Redirect won't work needs the hidden field
//return Redirect("http://www.bob.com/dologin.asp");
}

Solution:

解决方案:

Seems that it isn't easy to do this from the controller so I ended up using jQuery. The action returns a JsonResult. Something like:

似乎从控制器上做这件事并不容易，所以我最终使用了jQuery。该操作返回一个JsonResult。喜欢的东西:

<button id="Impersonate" class="button" onclick="Impersonate()">Impersonate!</button>

<form name="impdata" id="impersonateForm" action="http://www.bob.com/dologin.asp">
  <input type="hidden" value="" id="txtName" name="txtName" /> 
</form>

function Impersonate() {           
    $.ajax({
        type: 'POST',
        asynch: false,
        url: '@Url.Action("Impersonate", "Index")',
        data:
            {
                name: $('#txtName').val()                    
            },
        success: function (data) {                
            $('#txtName').val(data.Name);              
            $('#impersonateForm').submit();               
        }
    });

Seems to work well...

似乎工作得很好…

2 个解决方案

#1

It is rather hard to redirect to a POST from a POST (relies on HTTP status codes without universal support), and it is impossible from a GET.

从POST重定向到POST是相当困难的(依赖HTTP状态码而没有通用的支持)，而且从GET转到POST是不可能的。

The simplest solution is probably a little JavaScript on the result that posts the (new) form.

最简单的解决方案可能是在发布(新)表单的结果上添加一点JavaScript。

Thus you action method returns a view with the necessary data in it (passed via the model from the controller) which will include the JavaScript.

因此，action方法返回一个视图，其中包含必要的数据(通过控制器的模型传递)，其中包含JavaScript。

#2

You can try something like this(using jquery):

您可以尝试以下方法(使用jquery):

<input id="Impersonate" class="button" type="submit" value="Impersonate"    onclick="$('#txtName').val('new value')" />

#1