Incell Editing

The Telerik UI TreeList HtmlHelper for ASP.NET Core enables you to implement cell editing and make and save batch updates.

For a runnable example, refer to the demo on incell (batch) editing of the TreeList.

To set the incell edit mode of the TreeList:

  1. Add a new class to the ~/Models folder. The following example uses the EmployeeDirectoryModel name.

    public class EmployeeDirectoryModel
    {
        public int EmployeeId { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public int? ReportsTo { get; set; }
    }
    
  2. Open TreeListController.cs and add a new action method which will return the Directories as JSON. The TreeList will make Ajax requests to this action.

    public JsonResult All_InCell([DataSourceRequest] DataSourceRequest request)
    {
        var result = GetDirectory().ToTreeDataSourceResult(request,
            e => e.EmployeeId,
            e => e.ReportsTo,
            e => e
        );
    
        return Json(result);
    }
    
  3. Add a new action method to TreeListController.cs. It will be responsible for saving the new data items. Name the method Create_InCell.

    public JsonResult Create_InCell([DataSourceRequest] DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<EmployeeDirectoryModel> employees)
    {
        if (ModelState.IsValid)
        {
            foreach (var employee in employees)
            {
                employeeDirectory.Insert(employee, ModelState);
            }
        }
    
        return Json(employees.ToTreeDataSourceResult(request, ModelState));
    }
    
  4. Add a new action method to TreeListController.cs. It will be responsible for saving the updated data items. Name the method Update_InCell.

    public JsonResult Update_InCell([DataSourceRequest] DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<EmployeeDirectoryModel> employees)
    {
        if (ModelState.IsValid)
        {
            foreach (var employee in employees)
            {
                employeeDirectory.Update(employee, ModelState);
            }
        }
    
        return Json(employees.ToTreeDataSourceResult(request, ModelState));
    }
    
  5. Add a new action method to TreeListController.cs. It will be responsible for saving the deleted data items. Name the method Destroy_InCell.

    public JsonResult Destroy_InCell([DataSourceRequest] DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<EmployeeDirectoryModel> employees)
    {
        if (ModelState.IsValid)
        {
            foreach (var employee in employees)
            {
                employeeDirectory.Delete(employee, ModelState);
            }
        }
    
        return Json(employees.ToTreeDataSourceResult(request, ModelState));
    }
    
  6. In the view, configure the TreeList to use the action methods that were created in the previous steps. The Create, Update, and Destroy action methods have to return a collection with the modified or deleted records which will enable the DataSource to apply the changes accordingly. The Create method has to return a collection of the created records with the assigned ID field.

    @(Html.Kendo().TreeList<Kendo.Mvc.Examples.Models.TreeList.EmployeeDirectoryModel>()
        .Name("treelist")
        .Toolbar(toolbar =>
        {
            toolbar.Create();
            toolbar.Save();
            toolbar.Cancel();
        })
        .Columns(columns =>
        {
            columns.Add().Field(e => e.FirstName).Title("First Name").Width(220);
            columns.Add().Field(e => e.LastName).Title("Last Name").Width(100);
            columns.Add().Command(c =>
                {
                    c.CreateChild().Text("Add child");
                    c.Destroy();
                }
            ).Width(240);
        })
        .Editable(e => e.Mode(TreeListEditMode.InCell).Move(false))
        .DataSource(dataSource => dataSource
            .Batch(true)
            .Read(read => read.Action("All_InCell", "TreeList"))
            .Create(create => create.Action("Create_InCell", "TreeList").Type(HttpVerbs.Post))
            .Update(update => update.Action("Update_InCell", "TreeList").Type(HttpVerbs.Post))
            .Destroy(delete => delete.Action("Destroy_InCell", "TreeList").Type(HttpVerbs.Post))
            .Model(m =>
            {
                m.Id(f => f.EmployeeId);
                m.ParentId(f => f.ReportsTo);
            })
        )
    )
    

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