Hi,

I'm using Kendo professional for Asp.net Core.

I got the error in "Session.GetObjectFromJson<IList< " and "Session.SetObjectAsJson( "

SeverityCodeDescriptionProjectFileLineSuppression State
ErrorCS1061'ISession' does not contain a definition for 'GetObjectFromJson' and no accessible extension method 'GetObjectFromJson' accepting a first argument of type 'ISession' could be found (are you missing a using directive or an assembly reference?)

I tried to fix by install Session from Nuget. but I can't find any package called Session in Nuget.  Thank you if you can help.

ProductService.cs file:

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Http;
using Kendo.Mvc.Examples.Extensions;

namespace Kendo.Mvc.Examples.Models
{
public class ProductService : BaseService, IProductService
    {
        private static bool UpdateDatabase = false;
        private ISession _session;

        public ISession Session { get { return _session; } }

        public ProductService(IHttpContextAccessor httpContextAccessor)
        {
            _session = httpContextAccessor.HttpContext.Session;
        }

        public IEnumerable<ProductViewModel> Read()
        {
            return GetAll();
        }

        public IList<ProductViewModel> GetAll()
        {
            using (var db = GetContext())
            {
                var result = Session.GetObjectFromJson<IList<ProductViewModel>>("Products");

                if (result == null || UpdateDatabase)
                {
                    var categories = db.Categories.ToList();

                    result = db.Products.ToList().Select(product =>
                    {
                        var category = categories.First(c => product.CategoryID == c.CategoryID);

                        return new ProductViewModel
                        {
                            ProductID = product.ProductID,
                            ProductName = product.ProductName,
                            UnitPrice = product.UnitPrice.HasValue ? product.UnitPrice.Value : default(decimal),
                            UnitsInStock = product.UnitsInStock.HasValue ? product.UnitsInStock.Value : default(int),
                            QuantityPerUnit = product.QuantityPerUnit,
                            Discontinued = product.Discontinued,
                            UnitsOnOrder = product.UnitsOnOrder.HasValue ? product.UnitsOnOrder.Value : default(int),
                            CategoryID = product.CategoryID,
                            Category = new CategoryViewModel()
                            {
                                CategoryID = category.CategoryID,
                                CategoryName = category.CategoryName
                            },
                            LastSupply = DateTime.Today
                        };
                    }).ToList();

                    Session.SetObjectAsJson("Products", result);
                }

                return result;
            } 
        }

        public void Create(ProductViewModel product)
        {
            if (!UpdateDatabase)
            {
                var products = GetAll();
                var first = products.OrderByDescending(e => e.ProductID).FirstOrDefault();
                var id = (first != null) ? first.ProductID : 0;

                product.ProductID = id + 1;

                products.Insert(0, product);

                Session.SetObjectAsJson("Products", products);
            }
            else
            {
                using (var db = GetContext())
                {
                    var entity = new Product();

                    entity.ProductName = product.ProductName;
                    entity.UnitPrice = product.UnitPrice;
                    entity.UnitsInStock = (short)product.UnitsInStock;
                    entity.Discontinued = product.Discontinued;
                    entity.CategoryID = product.CategoryID;

                    if (entity.CategoryID == null)
                    {
                        entity.CategoryID = 1;
                    }

                    if (product.Category != null)
                    {
                        entity.CategoryID = product.Category.CategoryID;
                    }

                    db.Products.Add(entity);
                    db.SaveChanges();

                    product.ProductID = (int)entity.ProductID;
                }
            }
        }

        public void Update(ProductViewModel product)
        {
            if (!UpdateDatabase)
            {
                var products = GetAll();
                var target = products.FirstOrDefault(e => e.ProductID == product.ProductID);

                if (target != null)
                {
                    target.ProductName = product.ProductName;
                    target.UnitPrice = product.UnitPrice;
                    target.UnitsInStock = product.UnitsInStock;
                    target.Discontinued = product.Discontinued;
                    target.CategoryID = product.CategoryID;
                    target.Category = product.Category;
                }

                Session.SetObjectAsJson("Products", products);
            }
            else
            {
                using (var db = GetContext())
                {
                    var entity = new Product();

                    entity.ProductID = product.ProductID;
                    entity.ProductName = product.ProductName;
                    entity.UnitPrice = product.UnitPrice;
                    entity.UnitsInStock = (short)product.UnitsInStock;
                    entity.Discontinued = product.Discontinued;
                    entity.CategoryID = product.CategoryID;

                    if (product.Category != null)
                    {
                        entity.CategoryID = product.Category.CategoryID;
                    }

                    db.Products.Attach(entity);
                    db.Entry(entity).State = EntityState.Modified;
                    db.SaveChanges();
                }
            }
        }

        public void Destroy(ProductViewModel product)
        {
            if (!UpdateDatabase)
            {
                var products = GetAll();
                var target = products.FirstOrDefault(e => e.ProductID == product.ProductID);

                if (target != null)
                {
                    products.Remove(target);
                }

                Session.SetObjectAsJson("Products", products);
            }
            else
            {
                using (var db = GetContext())
                {
                    var entity = new Product();

                    entity.ProductID = product.ProductID;

                    db.Products.Attach(entity);

                    db.Products.Remove(entity);

                    var orderDetails = db.OrderDetails.Where(pd => pd.ProductID == entity.ProductID);

                    foreach (var orderDetail in orderDetails)
                    {
                        db.OrderDetails.Remove(orderDetail);
                    }

                    db.SaveChanges();
                }
            }
        }
    }
}

Hello,

How to reload a timeline (with Kendo grid I can use grid.dataSource.read();)

robert

Hi,

We've just bought the UI for ASP.NET Core components and have started using the Grid component in our ASP.NET Core 2.1 project. From what I understand, unlike the ASP.NET MVC grid, the ASP.NET Core grid is not a true server-side component and the Html and TagHelpers are basically just wrappers for the Kendo UI for jQuery client-side javascript based component, right?

If that's the case then what is the best way to implement server-side formatting/rendering of certain data in the columns of the grid? Until now we've used normal html tables and put our custom TagHelpers and text formatting functions calls directly in the cells of those tables (in the .cshtml files). For example we have a custom class that wraps an integer and converts that value to minutes and various other things.

I've noticed there is the ClientTemplate of the columns in the grid but you can't put TagHelpers or .ToString() methods in those templates since they are just evaluated in javascript on the client.

Is there a way to use the MVC grid in Core projects?

/Marcus

Hallo zusammen,

ich habe in meinem Grid zwei Knöpfe, die das edit event auslösen. Ich rufe damit das gleiche Popup auf, aber abhängig davon welcher Edit button geklickt wurde, müssen im Popup verschiedene Elemente ein- oder ausgeblendet werden. Ich habe noch keine Möglichkeit gefunden wie ich herausbekomme welcher Knopf geklickt wurde.

Beide Button befinden sich in der Toolbar
        .ToolBar(t =>
        {
            t.Create().Text("Add User");
            t.Create().Text("Add Host");
        }
 und das Event folgendermaße deklariert:
        .Events(events => events
            .Edit("insertPopupCaption")
        )

Kann mir hier bitte jemand weiterhelfen?

Kind regards
Markus

Hi

please help me how to use Kendo Editor Template

this is my code:

Product Model:

RichText EditorTemplate

usage in View:

but I get Error below:

Hi,

I'm using Telerik for ASP .NET Core and I have a model with a column that is a list.

The client template, which is generated correctly:

Then when I click a button in the column, I want to display a form, with 2 buttons, one that makes a POST, one that cancels/closes the form:

The template:

The problem is that in showDetails() function, I get an error on line 8:

 this.dataItem is not a function.

Also, e.currentTarget is undefined, but $(e).closest("tr") is the containing tr element.

 How can I achieve this functionality?

I have a Grid with an editable DateTime field. What happens is when I type in a date, if it doesn't adhere to the Format statement, it clears the field when I hit tab. What I want is if I enter something like 01012020, I want to try and parse it in javascript and get a valid date to use. I have tried using OnBlur, but that never gets called. The onDateChange function has null for the value of that field. I think it's already cleared it out.

The grid defines the field and the editor template as,

I am able to get a client-side reference to the combobox by using:

.HtmlAttributes(new { id = "myDropDown" })

and

$("#myDropDown").data("kendoComboBox")

However, I can't seem to figure out how to bind to the focus event. There is no server-side event method (such as Select(), Change(), etc) for it that I can see and it doesn't appear in the API documents.I am essentially trying to do something like this:

$("#myDropDown").on('focus', function () {
                $("#myDropDown").data("kendoComboBox").open();
            });

Thank you

Hello,

I try to change the background color regarding ON or OFF without success (note that .k-switch and .k-switch-handle works perfectly) :

Thank you for your precious help.