Javascript JQGrid下拉列表

我正在开发使用JQGrid的MVC应用程序。在JQGrid中，我需要显示CountryName，但当数据来自数据库Country属性为null时，我保存了CountryID

public partial class 
{
        public int ID { get; set; }
        public string Name { get; set; }
        public string Code { get; set; }
        public int CountryID { get; set; }
        public Nullable<System.DateTime> CreatedOn { get; set; }
        public Nullable<System.DateTime> UpdatedOn { get; set; }
        public string Description { get; set; }

        public virtual Country Country { get; set; }

    }

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jqgrid不知道如何处理列模型中的Country.Name。我建议在你的部分类中有一个名为CountryName的新属性，如下所示

public partial class 
{
        public int ID { get; set; }
        public string Name { get; set; }
        public string Code { get; set; }
        public int CountryID { get; set; }
        public Nullable<System.DateTime> CreatedOn { get; set; }
        public Nullable<System.DateTime> UpdatedOn { get; set; }
        public string Description { get; set; }

        public virtual Country Country { get; set; }

       public string CountryName { get{return Country.Name ; }

    }

colModel: [
              { key: true, hidden: true, name: 'ID', index: 'ID', sorttype: 'int' },
              { name: 'Name', index: 'Name', editable: true, inlineEditing: { keys: true }, minlength: 6 },
              { name: 'Description', index: 'Description', editable: true, inlineEditing: { keys: true } },
              { name: 'CountryName', index: 'CountryName', editable: true, edittype: "select", editoptions: { value: citySelect() } },
            ],

colModel: [
              { key: true, hidden: true, name: 'ID', index: 'ID', sorttype: 'int' },
              { name: 'Name', index: 'Name', editable: true, inlineEditing: { keys: true }, minlength: 6 },
              { name: 'Description', index: 'Description', editable: true, inlineEditing: { keys: true } },
              { name: 'CountryName', index: 'CountryName', editable: true, edittype: "select", editoptions: { value: citySelect() } },
            ],