Question

是否有一种方法可以使用Model属性将参数（不是字段名）从Controller类发送到Remote。

例如，我有这个Model课：

public class SubCategory
{
    [Key]
    public int ID { get; set; }
    public string ClassName
    {
        get { return "SubCategory"; }
    }
    [StringLength(450)]
    [Remote("IsSubCategoryExist", "Products", AdditionalFields = "ID, ClassName",
            ErrorMessage = "Product name already exists")]
    public virtual string Name { get; set; }
    public virtual string ParentName { get; set; }
}

我需要在触发SubCategory时将此类名IsSubCategoryExist作为参数发送给Products控制器中的Remote方法。可以实现吗？

更新：

控制器代码：

public async Task<JsonResult> IsSubCategoryExist(string Name, int? ID, string ClassName)
{
      var type = Assembly.GetExecutingAssembly()
                .GetTypes()
                .FirstOrDefault(t => t.Name == ClassName);

      if (type != null)
      {
         DbSet dbSet = _dbContext.Set(type);

         List<object> subCategories;
         if(ID == null)
         {
             subCategories = await dbSet.Where("Name == @0", Name) 
                                        .Take(1).ToListAsync();
         }
         else
         {
             subCategories = await dbSet.Where("Name == @0 and Id != @1", Name,ID)
                                        .Take(1).ToListAsync();
         }

         if(subCategories.Count > 0)
         {
            return Json(false,JsonRequestBehavior.AllowGet);
         }
         return Json(true,JsonRequestBehavior.AllowGet);
     }
     else
     {
        throw new Exception("Table name does not exist with the provided name");
     }
}

Answer 1

我想您可以将一个具有静态值的字段添加到模型中，然后将其添加到AdditionalFields：

public string ClassName { get {return "SubCategory";} }

[Remote("IsSubCategoryExist", "Products", AdditionalFields = "ID, ClassName",
        ErrorMessage = "Product name already exists")]
public virtual string Name { get; set; }

Answer 2

执行以下操作：

public string ClassName { get {return "SubCategory";} }

[Remote("IsSubCategoryExist", "Products", AdditionalFields = "ID, ClassName",
        ErrorMessage = "Product name already exists")]
public string Name { get; set; }

您必须按如下所示的形式放置一个隐藏字段，否则将出现ClassName is undefined错误：

Html.HiddenFor(x => x.ClassName)

在MVC中的“远程”属性上发送参数

2 个答案: