在线编辑时将剑道网格中的 ForeignKey 列值发送到控制器

Question

我已经为此苦苦挣扎了一段时间。我有一个剑道网格，网格内有几个下拉列表。我使用外键列将下拉列表放入网格中。内联编辑的网格不会将选定的下拉列表值发送到控制器，它会发送旧值。我不太确定出了什么问题，任何线索都会很有帮助。

代码：

查看

     @(Html.Kendo().Grid(Model.App_Client_Mapping)
    .Name("AppAccountInternalGrid")
    .Events(ev => ev.Edit("OnGridEdit"))
    .Columns(columns =>
    {

        columns.Bound(p => p.AccountMappingID).Title("AccountMappingID").Width(130).Hidden(true);

        columns.ForeignKey(p => p.Level1ID, (System.Collections.IEnumerable)ViewData["level1"], "Level1ID", "Level1").Title("Level 1").Width(150).HtmlAttributes(new { id = "Level1Dropdown", data_value_primitive = true });

        columns.ForeignKey(p => p.Level2ID, (System.Collections.IEnumerable)ViewData["level2"], "Level2ID", "Level2").Title("Level 2").Width(150).HtmlAttributes(new { id = "Level2Dropdown" });

        columns.Bound(p => p.ExternalAccount).Title("ExternalAccount").Width(150);
})

         .Editable(editable => editable.Mode(GridEditMode.InLine))
         .DataSource(dataSource => dataSource
             .Ajax()
             .PageSize(50)
             .Model(model =>
            {
                model.Id(p => p.AccountMappingID);
                model.Field(p => p.AccountMappingID).Editable(false);                
                model.Field(p => p.Level1ID).DefaultValue(1).Editable(true);
                model.Field(p => p.Level1).Editable(true);
                model.Field(p => p.Level2ID).DefaultValue(0).Editable(true);
                model.Field(p => p.Level2).Editable(true);    
            }


            )

          .Update("EditingInline_Update", "AppAccounts")
          .ServerOperation(false) 
     )



                )

控制器：

网格从此操作中获取数据。视图除了网格还有其他元素，所以我绑定了一个视图模型。

 public ActionResult AppInternal(int clientid)
    {
     var result = new AppViewModel();

    result.App_Client_Mapping=_unitofwork.AppInternal.Get(clientid);

        var level1 = level1list.Select(x => new App_Client_Mapping
                {

                    Level1ID = x.LevelID,
                    Level1 = x.Level1
                }).ToList();

     var level2 = level2list.Select(x => new App_Client_Mapping
                {

                    Level2ID = x.Level2ID,
                    Level2 = x.Level2

                }).ToList();

          ViewData["level1"] = level1;

                ViewData["level2"] = level2;

    }
     [AcceptVerbs(HttpVerbs.Post)]
            public ActionResult EditingInline_Update([DataSourceRequest] DataSourceRequest request, App_Client_Mapping mapping)
        {
           //save the mapping in the database tables

                    return Json(new[] { mapping }.ToDataSourceResult(request, ModelState));
    }

视图模型：

AppViewModel：

  public class AppMappingViewModel
{
public IEnumerable<App_Client_Mapping> App_Client_Mapping { get; set; }

//other fields

}

从 EF 自动生成的 app_client_mapping 类：

    public class app_client_mapping
    {
    public int AccountMappingID{get;set;}
    public int Level1ID{get;set;}
    public string Level1{get;set;}
    public int Level2ID{get;set;}
    public string Level2{get;set;}
   public string ExternalAccount{get;set;}
    }

当数据集传递给控制器​​时。仅发送网格中外部本地金额（文本框）的更新值。更新的下拉值不会发送到网格。任何关于为什么会发生这种情况的想法都会有很大帮助。

谢谢！

Answer 1

您的网格似乎缺少.Read 操作？

这是我在网格中的下拉菜单。我试图让它和你的代码一样。

控制器：

public IActionResult AppInternal()
{
  ViewData["level1"] = _context.level1list.Select(x => new App_Client_Mapping {
                Level1ID = x.LevelID,
                Level1 = x.Level1
            }); // Do not return a .List()
  // put more dropdowns as required...
  return View();
}

// return the .Read action from your grid
public IActionResult Read([DataSourceRequest] DataSourceRequest request)
{
  var result = new AppViewModel();
  result.App_Client_Mapping=_unitofwork.AppInternal.Get(clientid);
  return Json(result.ToDataSourceResult(request));
}

// Update
public EditingInline_Update([DataSourceRequest] DataSourceRequest request, App_Client_Mapping mapping)
{
    if (ModelState.IsValid)
    {
        // update db with the Level1ID from your dropdown
    }
    // Return the updated product. Also return any validation errors.
    return Json(new[] { mapping }.ToDataSourceResult(request, ModelState));
}

查看：

columns.ForeignKey(p => p.Level1ID, (System.Collections.IEnumerable)ViewData["level1"], "Level1ID", "Level1").Title("Level 1").Width(150); // Don't need to put HtmlAttributes.

// The .Read Action should be
.Read(read => read.Action("Read", "AppAccounts")

外键编辑器模板：

@model object

@(Html.Kendo().ComboBoxFor(m => m)
    .BindTo((SelectList)ViewData[ViewData.TemplateInfo.GetFullHtmlFieldName("") + "_Data"])
    .ValuePrimitive(true)
)

这里有一些代码示例：MVC Demo