https://github.com/episerver/Quicksilver/blob/master/Sources/EPiServer.Reference.Commerce.Site/Features/Cart/Services/CartService.cs

You can follow the examples here. In short we don't work with the concrete Shipment and LineItem class, but use cart.CreateLineItem and cart.CreateShipment extension methods to create the instances of ILineItem and IShipment we need.

Hi,

Thanks for reply.

I tried to create line item and shipment using cart.CreateLineItem and cart.CreateShipment.But still same issue occured.

The most common reason for an lineitem to be removed during a validation is that it does not have a valid price, or it does not have a valid inventory. Make sure your "1477707" lineitem has both those information. 

Hi,

Thanks for the reply.Order Total is not null.I found that Shipping method's base price is reflected in order total.I just get shipping methods using ShippingMethodDto and assign Base price value and save the changes.But it does not reflect in Commerce Manager.My code is like

//Get the list of all shipping methods to be filtered 
            ShippingMethodDto methods = ShippingManager.GetShippingMethods(SiteContext.Current.LanguageName);

//Assigning Base price value
for(int i = 0; i < 4; i++)
            {
                methods.ShippingMethod[i].BasePrice = 500;
                methods.AcceptChanges();
}
methods = ShippingManager.GetShippingMethods(SiteContext.Current.LanguageName);  //-->its returns old Base price value

Help me to override the base price value.

Thanks in advance.

For future ref!

Updates or add a shippingmethod (COM 13):

var method = ShippingManager.GetShippingMethod(model.ShippingMethodId);
                if (method?.ShippingMethod?.Count > 0)//update
                {
                    method.ShippingMethod[0].DisplayName = model.DisplayName;
                    method.ShippingMethod[0].Currency = model.Currency;
                    method.ShippingMethod[0].IsActive = model.IsActive;
                    method.ShippingMethod[0].IsDefault = model.IsDefault;
                    method.ShippingMethod[0].Name = model.Name;
                    method.ShippingMethod[0].Description = model.Description;
                    method.ShippingMethod[0].Ordering = model.Ordering;
                    method.ShippingMethod[0].LanguageId = model.LanguageId;
                    method.ShippingMethod[0].BasePrice = model.BasePrice;
                    ShippingManager.SaveShipping(method);
                }
                else
                {
                    //add
                    var methods = ShippingManager.GetShippingMethods("");
                    var row = methods.ShippingMethod.NewShippingMethodRow();
                    row.ShippingMethodId = model.ShippingMethodId;
                    row.ShippingOptionId = model.ShippingOptionId;
                    row.Created = row.Modified = DateTime.UtcNow;
                    row.DisplayName = model.DisplayName;
                    row.Currency = model.Currency;
                    row.IsActive = model.IsActive;
                    row.IsDefault = model.IsDefault;
                    row.Name = model.Name;
                    row.Description = model.Description;
                    row.Ordering = model.Ordering;
                    row.LanguageId = model.LanguageId;
                    row.BasePrice = model.BasePrice;
                    methods.ShippingMethod.Rows.Add(row);
                    ShippingManager.SaveShipping(methods);
                }