How do I set a checkbox in razor view?

问题:

I need to check a checkbox by default:

I tried all of these, nothing is checking my checkbox -

@Html.CheckBoxFor(m => m.AllowRating, new { @value = "true" })

@Html.CheckBoxFor(m => m.AllowRating, new { @checked = "true" })

@Html.CheckBoxFor(m => m.AllowRating, new { @checked = true })

@Html.CheckBoxFor(m => m.AllowRating, new { @checked = "checked"})

回答1:

You should set the AllowRating property to true, preferably in the controller or model.
Like other inputs, the checkbox's state reflects the value of the property.

回答2:

The syntax in your last line is correct.

 @Html.CheckBoxFor(x => x.Test, new { @checked = "checked" })

That should definitely work. It is the correct syntax. If you have an existing model and AllowRating is set to true then MVC will add the checked attribute automatically. If AllowRating is set to false MVC won't add the attribute however if desired you can using the above syntax.

回答3:

This works for me:

<input id="AllowRating" type="checkbox" checked="@Model.AllowRating" 
style="" onchange="" />

If you really wants to use HTML Helpers:

@Html.CheckBoxFor(m => m.AllowRating, new { @checked = Model.AllowRating})

回答4:

you set AllowRating property to true from your controller or model

      @Html.CheckBoxFor(m => m.AllowRating, new { @checked =Model.AllowRating })

回答5:

You can do this with @Html.CheckBoxFor():

@Html.CheckBoxFor(m => m.AllowRating, new{@checked=true });

or you can also do this with a simple @Html.CheckBox():

@Html.CheckBox("AllowRating", true) ;

回答6:

only option is to set the value in the controller, If your view is Create then in the controller action add the empty model, and set the value like,

Public ActionResult Create()
{
UserRating ur = new UserRating();
ur.AllowRating = true;
return View(ur);
} 

回答7:

If we set "true" in model, It'll always true. But we want to set option value for my checkbox we can use this. Important in here is The name of checkbox "AllowRating", It's must name of var in model if not when we post the value not pass in Database. form of it:

@Html.CheckBox("NameOfVarInModel", true) ;

for you!

@Html.CheckBox("AllowRating", true) ;

回答8:

I had the same issue, luckily I found the below code

@Html.CheckBoxFor(model => model.As, htmlAttributes: new { @checked = true} )

Check Box Checked By Default - Razor Solution

回答9:

I did it using Razor , works for me

Razor Code

@Html.CheckBox("CashOnDelivery", CashOnDelivery) (This is a bit or bool value) Razor don't support nullable bool
@Html.CheckBox("OnlinePayment", OnlinePayment)

C# Code

 var CashOnDelivery = Convert.ToBoolean(Collection["CashOnDelivery"].Contains("true")?true:false);
 var OnlinePayment = Convert.ToBoolean(Collection["OnlinePayment"].Contains("true") ? true : false);