HTML.Checkboxfor to Toggle button HTML?

问题

Is there anyway to convert the @HTML.Checkboxfor into toggle html button? I have refer the toggle button style from https://www.w3schools.com/howto/howto_css_switch.asp

Currently its working by using :

@Html.CheckBoxFor(model => model.IsEnabled, new { @checked = "checked", @Name = "DelegateChkBox" })

Changed to:

    <td class="slider-td">
         <label class="switch">
            <input name="DelegateChkBox" id="IsEnabled" type="checkbox" value="true" data-val-required="The IsEnabled field is required." data-val="true" data-bind="checked: IsEnabled">
          <div class="slider round"></div>
          </label>
   </td>

The toggle button only works and postback to controller if it's CHECKED:

else it won't postback to controller by default UNCHECKED :

Any help will be appreciated! Thanks!

回答1:

Based from some experiments and findings, I found that you need to include hidden field generated by the helper (Html.CheckBoxFor) as shown by styling below:

<style type="text/css">
.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.switch input {display:none;}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
}

/* include generated hidden field here */
input[type="checkbox"]:checked + input[type="hidden"] + .slider,
input[type="checkbox"]:checked + .slider {
  background-color: #2196F3;
}

/* include generated hidden field here */
input[type="checkbox"]:focus + input[type="hidden"] + .slider,
input[type="checkbox"]:focus + .slider {
  box-shadow: 0 0 1px #2196F3;
}

/* include generated hidden field here */
input[type="checkbox"]:checked + input[type="hidden"] + .slider:before,
input[type="checkbox"]:checked + .slider:before {
  transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}
</style>

View usage example (just change <input type="checkbox" /> to @Html.CheckBoxFor):

<label class="switch">
    @Html.CheckBoxFor(model => model.IsEnabled)
    <div class="slider round">
    </div>
</label>

To ensure the checkbox is being checked in client-side before doing postback, you can use jQuery code below:

// change event may modified to other events
$("#IsEnabled").change(function () {

    // check if checkbox is being checked
    // taken from /a/23007488 by Alexandru Chichinete
    if ($("#IsEnabled").is(":checked"))
    {
        // enable form submit
    }
});

Demo example: .NET Fiddle

References:

Styling checkboxes in MVC 4

How can I apply a CSS style to Html.CheckBoxFor in MVC 5

@Html.checkboxfor - Get checkbox value using id

回答2:

This is very simple, I have implemented in my project. You just need to keep the value of checkbox in a HiddenFor.

@Html.HiddenFor(model => model.IsEnabled, new{@id = "DelegateChkBox"})

Then display your Toggle button in the page. For example,

 <td class="slider-td">
   <label class="switch">
    <input name="DelegateChkBox" id="IsEnabled" type="checkbox" value="true" 
      data-val-required="The IsEnabled field is required." data-val="true" 
      data-bind="checked: IsEnabled">
    <div class="slider round"></div>
   </label>
 </td>

So now when user check/uncheck the checkbox, call a jquery method and assign the value to @Html.HiddenFor(..). That's it.

$('#IsEnabled').change(function(){
  if($(this).val()==true)
   {
    $('#DelegateChkBox').val(true);
   }
  else
   {
    $('#DelegateChkBox').val(false);
   }
})

Please check once this if ($("this").is(":checked")) instead if($(this).val()==true) and assign the value accordingly. Little busy, could not check my code :)

That's it. Now when you post back your page, you already set value to your IsEnabled field.

In Get method you have to do like the same. You just need to check the value of your HiddenFor() and take that value and assign to your HTML Toggle button in pageload event of js.

$(function() {
 if($('#DelegateChkBox').val()== true)
  {
   $('#IsEnabled').prop("disabled", false);
  }
 else
  {
   $('#IsEnabled').prop("disabled", true);
  }
});

That's it. Please change the HTML accordingly.

来源：https://stackoverflow.com/questions/42966789/html-checkboxfor-to-toggle-button-html