ASP.NET MVC CheckBoxFor "Cannot Convert from bool to system.linq."

Question

I'm simply trying to get a checkbox to display checked if a property (bool) is set to true.

This is a list of items, so I'm doing a for each in the list, then grabbing the property I'm checking HasImage. If that is true, I want a checked box for each item.

I'm getting the error

Argument type 'bool' is not assignable to parameter type system.linq.expressions.expression-system.func rma-vm,bool

What exactly is going on?

My code:

@foreach (var item in model.rmalist)
    <td>@Html.CheckBoxFor(item.HasImage)<td>

Try this `@Html.CheckBoxFor(m => m.HasImage, new { @checked = "checked" });`, https://stackoverflow.com/questions/12674572/proper-usage-of-net-mvc-html-checkboxfor — Selim Yildiz, Jun 15 '20 at 18:27

score 0 · Answer 1 · answered Jun 15 '20 at 16:54

0

Html.CheckBoxFor get Func from inputs . You should try this :

@Html.CheckBoxFor(m=> m.HasImage)

answered Jun 15 '20 at 16:54

Arsalan Valoojerdi

961
6
16

This doesn't work because "HasImage" is inside a list of RmaObjects, M => m.RmaObjects is all that shows up, because the hasimage property is inside of it. I thought doing the foreach loop would clear it up but I guess not. – st0rch1991 Jun 15 '20 at 17:00

score 0 · Answer 2 · answered Jun 16 '20 at 02:45

You can use below syntax to select/un-select check box based on the value

if HasImage is nullable then below format

@Html.CheckBox("HasImage", (item.HasImage?? false) ? item.HasImage: false)

if HasImage is not nullable then simply keep the value

@Html.CheckBox("HasImage", item.HasImage)

ASP.NET MVC CheckBoxFor "Cannot Convert from bool to system.linq."

2 Answers2