Cannot perform runtime binding on a null reference in mvc

Question

@if ((ViewBag.DynamicFields.Length == 0 )||((ViewBag.DynamicFields as ICollection<ChampModel.DynamicFields>).Where(o => o.Active == false).Count() == (ViewBag.DynamicFields as ICollection<ChampModel.DynamicFields>).Count()))
{
    <div class="info">
    @Html.Label("Dynamic fields were not assigned to this table")</div>
}

Answer 1

This error happens when you have a ViewBag property being nonexistent in your view.

See if there is a typo?

or just add check for null

 @if (((ViewBag.DynamicFields == null) ||(ViewBag.DynamicFields.Length == 0 )||((ViewBag.DynamicFields as ICollection<ChampModel.DynamicFields>).Where(o => o.Active == false).Count() == (ViewBag.DynamicFields as ICollection<ChampModel.DynamicFields>).Count()))