我有一个包含许多外键列的网格。现在只有键显示,但我想要这个例子中的正确数据。
以下代码是我填充网格的内容:
public partial class RuleEntry
{
public RuleEntry()
{
this.RuleEntriesCases = new HashSet<RuleEntriesCas>();
}
[Key]
public int ID { get; set; }
public string Country { get; set; }
public Nullable<int> Family { get; set; }
public Nullable<int> IP { get; set; }
public string RuleKey { get; set; }
public Nullable<int> Status { get; set; }
public string Title { get; set; }
[ForeignKey("Country")]
internal virtual Country Country1 { get; set; }
[ForeignKey("Family")]
internal virtual Family Family1 { get; set; }
[ForeignKey("IP")]
internal virtual IP IP1 { get; set; }
[ForeignKey("Status")]
internal virtual RuleStatus RuleStatus { get; set; }
[ScriptIgnore]
internal virtual ICollection<RuleEntriesCas> RuleEntriesCases { get; set; }
}
模型上下文如下所示:
public partial class entitiesName: DbContext
{
public entitiesName()
: base("name=entitiesName")
{
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
throw new UnintentionalCodeFirstException();
}
public DbSet<Case> Cases { get; set; }
public DbSet<Country> Countries { get; set; }
public DbSet<Family> Families { get; set; }
public DbSet<IP> IPs { get; set; }
public DbSet<RuleEntry> RuleEntries { get; set; }
public DbSet<RuleEntriesCas> RuleEntriesCases { get; set; }
public DbSet<Rule> Rules { get; set; }
public DbSet<RuleStatus> RuleStatuses { get; set; }
}
我的 Country 类如下所示:
public partial class Country
{
public Country()
{
this.RuleEntries = new HashSet<RuleEntry>();
}
[Key]
public string Code { get; set; }
public string Name { get; set; }
public virtual ICollection<RuleEntry> RuleEntries { get; set; }
}
我的cshtml文件看起来像这样
@(Html.Kendo().Grid(Model)
.Name("Grid")
.Columns(columns =>
{
columns.ForeignKey(r => r.Country, (System.Collections.IEnumerable)ViewData["Countries"], "Code", "Name")
.Title("Country").Width(150);
columns.Bound(p => p.Family);
columns.Bound(p => p.IP);
columns.Bound(p => p.RuleKey);
columns.Bound(p => p.Status);
columns.Bound(p => p.Title);
})
.Groupable()
.Editable(editable => editable.Mode(GridEditMode.InCell))
.Sortable()
.Scrollable(s => s.Height("auto"))
.Filterable()
.ColumnMenu()
.DataSource(dataSource => dataSource
.Ajax()
.Batch(true)
.ServerOperation(false)
.Model(model => model.Id(p => p.ID))
))
但是 columns.ForeignKey-line 会产生难以调试的错误
值不能为空。参数名称:items
我不知道如何解决这个问题,谷歌也不会给我任何相关的答案。谢谢!