Check UnCheck Input type CheckBox using ViewBag in ASP.Net MVC

ruben000...

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User: ruben00000
Posted: on Mar 16, 2024 12:20 AM
Forum: ASP.Net MVC
Answer: 1
Views: 1128
Sample Code: Download

HI,

I have a simple ViewBag with boolean result, which this value contain nullable boolean.

My Problem is, when ViewBag result (when true, false or null bool) send to input type CheckBox.

my input type always show false value

ViewBag.IsWarranty = true ;
ViewBag.IsWarranty = false;
ViewBag.IsWarranty = null;

{
    Layout = null;
    var _iswarranty = ((bool)(ViewBag.IsWarranty ?? false : ViewBag.IsWarranty ));
}

<input type="checkbox" name="IsWarranty" value="_iswarranty" />

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dharmend...

1 1

Reply
ANSWER
User: dharmendr
Replied: on Mar 16, 2024 12:31 AM
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Hi ruben00000,

First check the ViewBag is null or not. If null then set the variable to false else set with ViewBag value.

Then set using the checked property.

Refer below sample.

Controller

public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        ViewBag.IsWarranty = true;
        //ViewBag.IsWarranty = false;
        //ViewBag.IsWarranty = null;
        return View();
    }
}

View

@{
    Layout = null;
    var _iswarranty = (bool)(ViewBag.IsWarranty == null ? false : ViewBag.IsWarranty);
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    Do you have Passport: 
    <input type="checkbox" name="IsWarranty" checked="@(_iswarranty)" />
</body>
</html>

Screehshot

I agree, here is the link: https://www.e-iceblue.com/Introduce/spire-office-for-net-free.html

Check UnCheck Input type CheckBox using ViewBag in ASP.Net MVC

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