Question

我是MVC的新手。我的方法中有以下代码：

// Get list of news formats that were ticked  
IEnumerable<int> newsFormatIds = viewModel.ClubNewsFormats
     .Where(c => c.selected == true).
     Select(c => c.NewsFormatId);
// Copy news formats
IEnumerable<ClubNewsFormat> clubNewsFormats = club.ClubNewsFormats.ToList();
// Remove previous formats
foreach (ClubNewsFormat previousClubNewsFormats in clubNewsFormats)
{
    db.ClubNewsFormats.Remove(previousClubNewsFormats);
}
// Add new club news formats
foreach (int NewsFormatId in newsFormatIds)
{
    NewsFormat newsFormat = db.NewsFormats.Find(NewsFormatId);

    var newClubNewsFormat = new ClubNewsFormat {
            ClubId = club.ClubId,
            NewsFormatId = newsFormat.NewsFormatId,
            Discount =  
    };

    db.ClubNewsFormats.Add(newClubNewsFormat);
}

它获取视图中勾选的项目列表，然后将每个项目的记录添加到ClubNewsFormats表中。通过使用IEnumerable生成所有Model.ClubNewsFormats [c] .NewsFormatId的列表，其中Model.ClubNewsFormats [c] .selected为true。除了能够选择ID之外，您还可以为每个Id添加折扣。我希望能够在将每个选定ID保存到ClubNewsFormats表时为其提交此折扣值。

如何将Discount添加到IEnumerable以及Id以便我可以在foreach（newsFormatIds中的int NewsFormatId）循环中提交它？

视图的部分是：

@for (int c = 0; c < Model.ClubNewsFormats.Count(); c++)
{
<div>
@Html.HiddenFor(x => Model.ClubNewsFormats[c].NewsFormatId)
@Html.CheckBoxFor(x => Model.ClubNewsFormats[c].selected)
@Html.LabelFor(x => Model.ClubNewsFormats[c].Format, Model.ClubNewsFormats[c].Format)
@Html.EditorFor(x => Model.ClubNewsFormats[c].Discount)
</div>
}

视图模型是：

    public class ClubNewsFormatsViewModel
{   
    public int NewsFormatId { get; set; }

    public string Format { get; set; }

    public bool selected { get; set; }

    [Display(Name = "Discount")]
    public decimal Discount { get; set; }
}

在主视图模型中引用：

public ClubNewsFormatsViewModel[] ClubNewsFormats { get; set; }

Answer 1

我修改了控制器：

// Remove previous formats
foreach (ClubNewsFormat previousClubNewsFormats in clubNewsFormats)
    {
         db.ClubNewsFormats.Remove(previousClubNewsFormats);
    }
    // Add new club news formats
foreach (ClubNewsFormatsViewModel clubNewsFormat in viewModel.ClubNewsFormats.Where(c => c.selected == true))
    {
         var newClubNewsFormat = new ClubNewsFormat { ClubId = club.ClubId, NewsFormatId = clubNewsFormat.NewsFormatId, Discount = clubNewsFormat.Discount };

         db.ClubNewsFormats.Add(newClubNewsFormat);
     }

然后添加在IEnumerable中引用多个值

1 个答案: