drielnox's questions

I'm having a problem when inserting a UserControl in a form. I drag my UserControl onto the form, save, and get the following screen:

I searched for SO and there is someone who had the same problem as me but I can't understand the answer or what to say with it.

I briefly show you the code and some indications so that you can guide me on the matter.

This is the UserControl and how it is bound:

The class that is bound to bsControl is the following:

namespace SmartInventorySystem.ViewModel.Controls
{
    public class DispenseCartControlViewModel : FormViewModel
    {
        public DispenseCartControlViewModel()
        {
            ItemsToCheckout = new List<ItemToCheckoutRowViewModel>();
        }

        public List<ItemToCheckoutRowViewModel> ItemsToCheckout { get; set; }

        public decimal SubTotal
        {
            get; //=> ItemsToCheckout.Sum(x => x.Quantity * x.UnitPrice);
            set;
        }

        public decimal Discount { get; set; }
        public decimal Vat { get; set; }
        public decimal Total
        {
            get; //=> SubTotal - Discount + Vat > 0 ? (Vat / 100 * (SubTotal - Discount)) : 0;
            set;
        }
    }
}

And finally, the code that has the control:

public partial class DispenseCartControl : UserControl, IDispenseCartView
    {
        private readonly DispenseCartPresenter _presenter;

        public DispenseCartControl()
        {
            InitializeComponent();

            _presenter = new DispenseCartPresenter(this);

            State = new DispenseCartControlViewModel();
        }

        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        public DispenseCartControlViewModel State { get; set; }

        public void ShowError(Exception ex)
        {
            MessageBox.Show(this, ex.Message, "Dispense Cart", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }

        public void ShowInfo(string msg)
        {
            MessageBox.Show(this, msg, "Dispense Cart", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        public void UpdateFormBindingSource()
        {
            bsControl.ResetBindings(false);
        }

        private void DispenseCartControl_Load(object sender, EventArgs e)
        {
            bsControl.DataSource = State;
        }
    }

Update 1 : I add the call-stack where the designer throws me an error.

at System.Windows.Forms.BindToObject.CheckBinding() at System.Windows.Forms.BindToObject.SetBindingManagerBase(BindingManagerBase lManager) at System.Windows.Forms.Binding.SetListManager(BindingManagerBase bindingManagerBase) at System.Windows.Forms.ListManagerBindingsCollection.AddCore (Binding dataBinding) at System.Windows.Forms.BindingsCollection.Add(Binding binding) at System.Windows.Forms.BindingContext.UpdateBinding(BindingContext newBindingContext, Binding binding) at System.Windows.Forms.Control.UpdateBindings() at System. Windows.Forms.Control.OnBindingContextChanged(EventArgs e) at System.Windows.Forms.Control.OnParentBindingContextChanged(EventArgs e) at System.Windows.Forms.Control.OnBindingContextChanged(EventArgs e) at System.Windows.Forms.Control.OnParentBindingContextChanged EventArgs e) at System.Windows.Forms.Control.OnBindingContextChanged(EventArgs e) at System.Windows.Forms.Control.OnParentBindingContextChanged(EventArgs e) at System.Windows.Forms.Control.OnBindingContextChanged(EventArgs e) at System.Windows.Forms.Control.OnParentBindingContextChanged(EventArgs e) at System.Windows.Forms.Control.OnBindingContextChanged(EventArgs e) at System.Windows.Forms.Control.set_BindingContextInternal(BindingContext value) at System.Windows.Forms.ContainerControl.set_BindingContext(BindingContext value) at System.Windows.Forms.ContainerControl. get_BindingContext() at System.Windows.Forms.Control.get_BindingContextInternal() at System.Windows.Forms.SplitContainer.get_BindingContext() at System.Windows.Forms.Control.get_BindingContextInternal() at System.Windows.Forms.Control.get_BindingContext( ) at System.Windows.Forms.Control.get_BindingContextInternal() at System.Windows.Forms.ContainerControl.get_BindingContext() at System.Windows.Forms.Control.get_BindingContextInternal() at System.Windows.Forms.ContainerControl.get_BindingContext() at System.Windows.Forms.Control.UpdateBindings( ) at System.Windows.Forms.Control.OnBindingContextChanged(EventArgs e) at System.Windows.Forms.ContainerControl.OnCreateControl() at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control. CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl() at System.Windows. Forms.Control.ControlCollection.Add(Control value) at System.Windows.Forms.Form.ControlCollection.Add(Control value) at System.Windows.Forms.Design.ControlDesigner.DesignerControlCollection.Add(Control c)

After installing and uninstalling EF 6.1.3 in several projects of my solution, when I wanted to use it I had the following problem:

No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'. Make sure the provider is registered in the 'entityFramework' section of the application config file. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.

I have EF wrapped , to avoid referencing EF assemblies in other projects, with the Unit of Work pattern.

I've been researching SOen on the following questions and they couldn't solve my problem:

• No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'
• No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'.
• Entity Framework Provider type could not be loaded?
• Error: No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'

I chose not to apply the following solutions because, in my opinion, they raise doubts about their implementation and are walk-arounds :

• Load the assembly to Java; by calling the provider instance.
• Reference the EF in the initial project, along with its provider.
• Make a post-compile copy of the fileEntityFramework.SqlServer.dll

I would like to know how I can do this as I could implement a caching mechanism for a sample application written in C# . This implementation is intended to end up as a library.

I know that EntityFramework has a somewhat similar mechanism to Auto Refresh and that NHibernate has cache levels. But I have a vague idea of ​​the concept and no idea how they work internally.

From the little research I know it has something to do with SQL Server Broker Service , where the service sends messages to MSMQ and from my application I pool against MSMQ but I never saw an implementation example.

Update

Well, to contextualize where this applies to, it is an industry-wide Warehouse Management System . The system has about 15 services running at the same time and asking the database all the time about the movement of the products and containers that are in the respective storage areas.

For what reason are there 15 services running?

The warehouse that uses this management system has several lines with barcode scanners reading about 10 labels per minute at peak times, and each of these lines has a particular service because the logic varies in each line and in each logic makes a verification to different services and the existence of said barcode in the database.

In addition, it has 10 AGVs (Automated Guided Vehicles) that have services such as: Task issuer for AGV , Task Scheduler , etc. and these are constantly pooling against the database looking for new tasks to perform. The same happens with the terminals of forklift operators who constantly pool the database in search of new container movement orders.

It remains to add that reception, dispatch and storage are also automated and each of these has its own service(s).

Why doesn't the system have middleware ?

I must clarify that this system, of such magnitude, does not have middleware (which would be a glory because it would solve many architectural problems) since it is a system adapted to an old system from around 1995. and other systems where production was limited for those dates. Today, it had to be upgraded and we are having scalability issues to increase production.

To understand this, the BL and the DAL are on the same server and, therefore, it does not give me the possibility to distribute the data query load.

I clarify that the application has the client made in WinForms where they connect to the services (console application).

I'm doing a personnel absence registration application and the problem arose that I need to indicate to a form, where a certain entity is listed, the next form that should be opened after having been chosen.

My question is, more than anything, about implementation and design since I have an idea of ​​how to apply it but I have my doubts about whether it is maintainable. I have the ability to use an enum to indicate the next form or pass the form type or form instance per constructor. There may be another, more elegant way to do it, but I don't know of it.

I didn't choose to instantiate the forms serially for performance, maintainability, and extensibility issues.

To guide you a little more, workflow would be as follows:

frmMain.cs :

It's the main screen to boot up and you have these 2 options.

private void tsmiDatosPersonal_Click(object sender, EventArgs e)
{
    frmPersonalListado frm = new frmPersonalListado();
    frm.ShowDialog(this);
}

private void tsmiInasistenciasPersonal_Click(object sender, EventArgs e)
{
    frmPersonalListado frm = new frmPersonalListado();
    frm.ShowDialog(this);
}

frmPersonalListing.cs :

It is where the staff of the establishment is listed and then I select one from the list and open the following form.

public frmPersonalListado()
{
    InitializeComponent();
    _personalNegocio = new PersonalNegocio();
    _inasistenciaNegocio = new Lazy<InasistenciaNegocio>();
}

public frmPersonalListado(Form formularioObjetivo) 
    : this()
{
    _formularioObjetivo = formularioObjetivo;
}

private void tsbVerPersonal_Click(object sender, EventArgs e)
{
    Aplicacion.Entidades.Personal personalSeleccionado = lvPersonal.SelectedItems[0].Tag as Aplicacion.Entidades.Personal;
    frmPersonalCRUD frm = new frmPersonalCRUD(ModoFormulario.Ver, personalSeleccionado); // <<< Aca deberia instanciar el formulario correcto elegido desde el menú.
    frm.ShowDialog(this);
}

The flow is similar to that of a workflow with which there is a behavior that is defined at the beginning: If X or Y final form is opened.

Edit 1:

As it is difficult to interpret the idea, I leave you with an image that shows the workflow that the forms I work with follow.

The real problem is what is the correct design and implementation to make the initial form tell the next form what behavior it should have so that it opens one of the last forms.

Edit 2:

The following code commit demonstrates the code smell I mentioned earlier.

My idea is that, every time I instantiate frmPersonalListado, I pass through the constructor the behavior that it has to have when I select a staff from the list. This behavior is to instantiate the following form, passing the staff chosen from the list as a parameter to the constructor.

private void tsbPersonalInasistencias(object sender, EventArgs event)
{
    var frm = new frmPersonalListado(x => {
        var frm2 = new frmCrudPersonal(); // <<< Como inyecto el personal aca?
        frm2.ShowDialog(this) // <<< Ese this podria ser frm?
    });
    frm.ShowDialog(this);
}

public frmPersonalListado(Func<Personal, void> nextForm)
{
    _func = nextForm;
}

private void btnSeleccionar_Click(object sender, EventArgs event)
{
    var personal = ObtenerPersonalSeleccionado();
    _func(personal); // Magicamente, deberia instanciar el form con el personal seleccionado.
}

But the code above is an idea that doesn't compile.