Drop down menu 填充DropDownListFor，默认值为guid参数

我已经用所有正确的值填充了DropDownList for。我正在传递Guid参数，但不知道如何将默认值设置为该Guid

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<div class="form-group">
  @Html.LabelFor(model => model.Parent)
  @Html.DropDownListFor(model => model.Parent, new SelectList(Model.AllParents, "Id", "Name"), string.Empty, new { @class = "form-control" })
  @Html.ValidationMessageFor(model => model.Parent)
</div>

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您需要将string.Empty替换为“您想要的默认值”

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您需要将

string.Empty

替换为“Default value do you want”

@Html.DropDownListFor（model=>model.Parent，new SelectList（model.AllParents，“Id”，“Name”），“Default value is here”，new{@class=“form control”}）

gez…完全忽略了这一点。复制并粘贴答案，这样我就可以给你评分了。谢谢

public class ParentViewModel
{
     public List<Parent> AllParents { get; set; }

     [DisplayName("Parent")]
     public Guid? ParentId { get; set; }

}

[HttpGet]
public ActionResult Create(Guid? id)
{

            var parentViewModel = new ParentViewModel
            {
                AllParents = _Service.GetAll().ToList()
            };
            return View(parentViewModel);
        }
    }

@Html.DropDownListFor(model => model.Parent, new SelectList(Model.AllParents, "Id", "Name"), "Default value is here here", new { @class = "form-control" })