如何从 FormCollection 获取复选框值? [英] How to get checkbox value from FormCollection?

问题描述

我有一个复选框和按钮:

@using(Html.BeginForm()){<div id="搜索块"><input type="checkbox" name="showAll" id="showAll">包含完成<input type="submit" value="Apply"/>

}

和控制器中的第二件事:

[HttpPost]公共 ActionResult 索引(FormCollection 集合){var showAll = collection["showAll"];TempData["showAll"] = showAll;...某物...}

它确实有效，但是:

如果未选中复选框，我将收到 null(我不会太在意).

如果复选框被选中，我会收到来自 FormCollection 的on"，这不是我需要的.我想收到真假.

我该怎么做?

解决方案

Include completed

将发布 "on" 或 "off" 的值.

这个不会绑定到一个布尔值，

要接收布尔值，您可以使用 HTML Helper Checkbox喜欢

@Html.CheckBox("showAll")<label for="showAll" style="display:inline">包括已完成</label>

更新:

<块引用>

如果选中，html helper 将回发 "true,false" 并且如果未选中为 "false"

您可以将此解决方法作为

bool MyBoolValue= Convert.ToBoolean(collection["showAll"].Split(',')[0]);

这是因为Html helpers 类添加了一个额外的hidden 字段来保存复选框的状态

I have a checkbox and button:

@using(Html.BeginForm())
{
    <div id="search-block">
        <input type="checkbox" name="showAll" id="showAll">Include completed
        <input type="submit" value="Apply"/>
    </div>
}

and second thing in controller:

[HttpPost]
public ActionResult Index(FormCollection collection)
{
    var showAll = collection["showAll"];
    TempData["showAll"] = showAll;

    ... 
    something
    ...
}

It's actually working, BUT:

If checkboxes are not checked, I am receiving null (doesn't bother me much).

If checkboxes are checked, I am receiving "on" from FormCollection, and this is not what I need. I want to receive true or false.

How can I do this?

解决方案

<input type="checkbox" name="showAll" id="showAll">Include completed

Will Post a value of "on" or "off".

This WONT bind to a boolean,

To receive a boolean value you can use HTML Helper Checkbox Like

@Html.CheckBox("showAll")
<label for="showAll" style="display:inline">Include completed</label>

Update:

If checked the html helper will post back "true,false" and if unchecked as "false"

You can have this workaround as

bool MyBoolValue= Convert.ToBoolean(collection["showAll"].Split(',')[0]);

This is because the Html helpers class adds an extra hidden field to save the state of the checkbox

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