在视图中检查 DateTime 类型的值是否为空，如果为空则显示为空 [英] Checking if the value of type DateTime is null in view and showing blank if null

问题描述

从我的控制器中，我已将值模块传递给视图

From my controller I have passed value module to view

    public ActionResult Details(long id, string owner)
    {
        var module = _ownedModuleRepository.GetModuleDetails(id, owner);

        return View(module);
    }

我在视图中显示了它包含的值，如下所示

I've shown the value it contains in view as follows

    <dt>ID</dt>
    <dd>@Model.Id</dd>

    <dt>Module ID</dt>
    <dd>@Model.ModuleId</dd>

     <dt>Owner</dt>
    <dd>@Model.Owner</dd>

    <dt>Module Type</dt>
    <dd>@Model.TypeName</dd>

    <dt>Module Kind</dt>
    <dd>@Model.KindName</dd>

    <dt>Ownership Start Date</dt>
    <dd>@Model.Start</dd>

    <dt>Ownership End Date</dt>
    <dd>@Model.End</dd>

    @foreach (var properties in Model.Properties)
    {
        <dt>Property Name</dt>
        <dd>@properties.Name</dd>
        <dt>Property Value</dt>
        <dd>@properties.Value</dd>
    }

当前 @Model.End 为空，它是 DateTime 类型，我已在视图模型中将其设置为可为空.由于它是空的，这就是我所看到的

Currently @Model.End is null, it is of DateTime type and I had set it to be nullable in viewmodel. Since it is null, this is what i'm getting in view

如您所见，所有权结束日期的值是从下面的属性名称的值中提取的.如果 @Model.End 为空，如何将其设置为空?

As you can see, the value of Ownership End Date is taking the value of Property Name from below. How can I set it to empty if the @Model.End is null?

编辑 1:

我的模型

public class OwnedModuleDetails
{
    public long Id { get; set; }

    public string ModuleId { get; set; }

    public string Owner { get; set; }

    public string KindName { get; set; }
    public string TypeName { get; set; }

    public DateTime Start { get; set; }

    public DateTime? End { get; set; }

    public IEnumerable<Property> Properties { get; set; }
}

存储库中的方法

     public OwnedModuleDetails GetModuleDetails(long id, string owner)
        {
// ReSharper disable ImplicitlyCapturedClosure
            var module = (_dbSis.OwnedModules.Where(t => t.Id == id).Select(m => new OwnedModuleDetails
// ReSharper restore ImplicitlyCapturedClosure
            {
                Id = id,
                ModuleId = m.ModuleId,
                TypeName = m.ModuleType.TypeName,
                KindName = m.ModuleType.ModuleKind.KindName,
                Owner = owner,
                Start = m.Start,
                End = m.End,
                Properties = m.PropertyConfiguration.PropertyInstances.Select(
                    x => new Property { Name = x.Property.Name, Value = x.Value })
            }));

            return (module.FirstOrDefault());
        }

推荐答案

尝试添加空格:

<dt>Ownership End Date</dt>
<dd>
    @if (Model.End != null)
    {
        @Model.End
    }
    else
    {
        @:&nbsp;
    }
</dd>

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