C# 无法在mvc中对空引用执行运行时绑定 @if（（ViewBag.DynamicFields.Length==0）| |（（ViewBag.DynamicFields作为ICollection）。其中（o=>o.Active==false）。Count（）==（ViewBag.DynamicFields作为ICollection）。Count（）） { @Label（“未将动态字段分配给此表”） }

当视图中不存在ViewBag属性时，会发生此错误

看看是否有打字错误

或者只需添加null检查

@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>
}

@if（（ViewBag.DynamicFields==null）| |（ViewBag.DynamicFields.Length==0）| |（（ViewBag.DynamicFields作为ICollection）。其中（o=>o.Active==false）。Count（）=（ViewBag.DynamicFields作为ICollection.Count（））

什么是打字错误？@KiruthigaSankar拼写错误。您是否在控制器中添加了值？

 @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()))