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Components / Data Management / Grid / Editing / Batch
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Batch Editing

The Telerik UI Grid component 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 batch editing of the Grid.

Defining a Schema.Model.Id is mandatory for the proper execution of the Update, Create and Destroy of the Grid.

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

    C#
    public class ProductViewModel
{
    public int ProductID { get; set; }
    // The ProductName property is required.
    [Required]
    public string ProductName { get; set; }
    // Use the Integer editor template for the UnitsInStock property.
    [UIHint("Integer")]
    public short? UnitsInStock { get; set; }
}

  2. Open HomeController.cs and add a new action method which will return the Products as JSON. The Grid will make Ajax requests to this action.

    C#
    public ActionResult Products_Read([DataSourceRequest]DataSourceRequest request)
{
    // ToDataSourceResult works with IEnumerable and IQueryable.
    using (var northwind = new NorthwindEntities())
    {
        IQueryable<Product> products = northwind.Products;
        DataSourceResult result = products.ToDataSourceResult(request);
        return Json(result);
    }
}

  3. Add a new action method to HomeController.cs. It will be responsible for saving the new data items. Name the method Products_Create.

    C#
    public ActionResult Products_Create([DataSourceRequest]DataSourceRequest request, [Bind(Prefix="models")]IEnumerable<ProductViewModel> products)
{
    // Will keep the inserted entities here. Used to return the result later.
    var entities = new List<Product>();
    if (ModelState.IsValid)
    {
        using (var northwind = new NorthwindEntities())
        {
            foreach (var product in products)
            {
                // Create a new Product entity and set its properties from the posted ProductViewModel.
                var entity = new Product
                {
                    ProductName = product.ProductName,
                    UnitsInStock = product.UnitsInStock
                };
                // Add the entity.
                northwind.Products.Add(entity);
                // Store the entity for later use.
                entities.Add(entity);
            }
            // Insert the entities in the database.
            northwind.SaveChanges();
        }
    }
    // Return the inserted entities. The Grid needs the generated ProductID. Also return any validation errors.
    return Json(entities.ToDataSourceResult(request, ModelState, product => new ProductViewModel
    {
        ProductID = product.ProductID,
        ProductName = product.ProductName,
        UnitsInStock = product.UnitsInStock
    }));
}

  4. Add a new action method to HomeController.cs. It will be responsible for saving the updated data items. Name the method Products_Update.

    C#
    public ActionResult Products_Update([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<ProductViewModel> products)
{
    // Will keep the updated entities here. Used to return the result later.
    var entities = new List<Product>();
    if (ModelState.IsValid)
    {
        using (var northwind = new NorthwindEntities())
        {
            foreach (var product in products)
            {
                // Create a new Product entity and set its properties from the posted ProductViewModel.
                var entity = new Product
                {
                    ProductID = product.ProductID,
                    ProductName = product.ProductName,
                    UnitsInStock = product.UnitsInStock
                };
                // Store the entity for later use.
                entities.Add(entity);
                // Attach the entity.
                northwind.Products.Attach(entity);
                // Change its state to Modified so Entity Framework can update the existing product instead of creating a new one.
                northwind.Entry(entity).State = EntityState.Modified;
                // Or use ObjectStateManager if using a previous version of Entity Framework.
                // northwind.ObjectStateManager.ChangeObjectState(entity, EntityState.Modified);
            }
            // Update the entities in the database.
            northwind.SaveChanges();
        }
    }
    // Return the updated entities. Also return any validation errors.
    return Json(entities.ToDataSourceResult(request, ModelState, product => new ProductViewModel
    {
        ProductID = product.ProductID,
        ProductName = product.ProductName,
        UnitsInStock = product.UnitsInStock
    }));
}

  5. Add a new action method to HomeController.cs. It will be responsible for saving the deleted data items. Name the method Products_Destroy.

    C#
    public ActionResult Products_Destroy([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<ProductViewModel> products)
{
    // Will keep the destroyed entities here. Used to return the result later.
    var entities = new List<Product>();
    if (ModelState.IsValid)
    {
        using (var northwind = new NorthwindEntities())
        {
            foreach (var product in products)
            {
                // Create a new Product entity and set its properties from the posted ProductViewModel.
                var entity = new Product
                {
                    ProductID = product.ProductID,
                    ProductName = product.ProductName,
                    UnitsInStock = product.UnitsInStock
                };
                // Store the entity for later use.
                entities.Add(entity);
                // Attach the entity.
                northwind.Products.Attach(entity);
                // Delete the entity.
                northwind.Products.Remove(entity);
                // Or use DeleteObject if using a previous version of Entity Framework.
                // northwind.Products.DeleteObject(entity);
            }
            // Delete the entity in the database.
            northwind.SaveChanges();
        }
    }
    // Return the destroyed entities. Also return any validation errors.
    return Json(entities.ToDataSourceResult(request, ModelState, product => new ProductViewModel
    {
        ProductID = product.ProductID,
        ProductName = product.ProductName,
        UnitsInStock = product.UnitsInStock
    }));
}

  6. In the view, configure the Grid 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.

    Razor
        @(Html.Kendo().Grid<KendoGridBatchEditing.Models.ProductViewModel>()
            .Name("grid")
            .Columns(columns =>
            {
                columns.Bound(product => product.ProductID).Width(100);
                columns.Bound(product => product.ProductName);
                columns.Bound(product => product.UnitsInStock).Width(250);
                columns.Command(commands =>
                {
                    commands.Destroy(); // The "destroy" command removes data items.
                }).Title("Commands").Width(200);
            })
            .ToolBar(toolbar =>
            {
                toolbar.Create(); // The "create" command adds new data items.
                toolbar.Save(); // The "save" command saves the changed data items.
            })
            .Editable(editable => editable.Mode(GridEditMode.InCell)) // Use in-cell editing mode.
            .DataSource(dataSource =>
                dataSource.Ajax()
                .Batch(true) // Enable batch updates.
                .Model(model =>
                {
                    model.Id(product => product.ProductID); // Specify the property which is the unique identifier of the model.
                    model.Field(product => product.ProductID).Editable(false); // Make the ProductID property not editable.
                })
                .Create(create => create.Action("Products_Create", "Home")) // Action method invoked when the user saves a new data item.
                .Read(read => read.Action("Products_Read", "Home"))  // Action method invoked when the Grid needs data.
                .Update(update => update.Action("Products_Update", "Home"))  // Action method invoked when the user saves an updated data item.
                .Destroy(destroy => destroy.Action("Products_Destroy", "Home")) // Action method invoked when the user removes a data item.
            )
            .Pageable()
    )

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