Asp.net mvc MVC@html.textbox用于使用Guid默认值预填充

我的控制器：

 [HttpGet]
 public ActionResult AddEstablishment()
 {     
    return View("AddEstablishment",new EstablishmentModel());
 }

public class EstablishmentModel
{
    [Display(Name = "Establishment ID")]
    public Guid EstablishmentId { get; set; }
    .............

 @Html.TextBoxFor(x => x.EstablishmentId, new { @id = "inputEstGuid", @class = "input input-xlarge", @placeholder = "5C3B1CBC-2574-4E2A-A9FA-A8CA0041AB86" })

我的型号：

 [HttpGet]
 public ActionResult AddEstablishment()
 {     
    return View("AddEstablishment",new EstablishmentModel());
 }

public class EstablishmentModel
{
    [Display(Name = "Establishment ID")]
    public Guid EstablishmentId { get; set; }
    .............

 @Html.TextBoxFor(x => x.EstablishmentId, new { @id = "inputEstGuid", @class = "input input-xlarge", @placeholder = "5C3B1CBC-2574-4E2A-A9FA-A8CA0041AB86" })

我的建立视图：

 [HttpGet]
 public ActionResult AddEstablishment()
 {     
    return View("AddEstablishment",new EstablishmentModel());
 }

public class EstablishmentModel
{
    [Display(Name = "Establishment ID")]
    public Guid EstablishmentId { get; set; }
    .............

 @Html.TextBoxFor(x => x.EstablishmentId, new { @id = "inputEstGuid", @class = "input input-xlarge", @placeholder = "5C3B1CBC-2574-4E2A-A9FA-A8CA0041AB86" })

结果：

 [HttpGet]
 public ActionResult AddEstablishment()
 {     
    return View("AddEstablishment",new EstablishmentModel());
 }

public class EstablishmentModel
{
    [Display(Name = "Establishment ID")]
    public Guid EstablishmentId { get; set; }
    .............

 @Html.TextBoxFor(x => x.EstablishmentId, new { @id = "inputEstGuid", @class = "input input-xlarge", @placeholder = "5C3B1CBC-2574-4E2A-A9FA-A8CA0041AB86" })

我的文本框正在预填充Guid默认值

00000000-0000-0000-0000-00000000

我如何避免它？

请注意，我向视图传递模型实例的原因很明显。

这不应该起作用吗

 public Guid? EstablishmentId { get; set; }

---

当您最初显示视图时，只需确保该值为null。

您不需要将模型传递到视图中，如果不传递它，它将起作用

如果您确实必须这样做，请执行以下操作：

private string _establishmentIdAsString = string.Empty;
[Display(Name = "Establishment ID")]
public string EstablishmentIdAsString
{
    get
    {
        return _establishmentIdAsString;
    }
    set
    {
        _establishmentIdAsString = value;
        EstablishmentId = new Guid(value);
    }
}

---

让我试试看，出于某些原因，我必须将模型传递给视图。如果它是一个空模型，您不必这样做，它只是在呈现视图时实例化一个新模型。不需要额外的检查来确保值是否为null。只需更改为可为null的Guid就可以了。是的，我并没有建议添加其他代码。我只是想让你，作为一个程序员，当你把它绑定到你的文本框时，知道这个值是空的。