Pass boolean value between custom forms - Windows Form

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Pass boolean value between custom forms - Windows Form

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#1 by (3 votes)
#2 by (2 votes)

2

I am developing a Windows Form type solution that contains two forms:

Form frm_open_window :

Fields:

(1) Button "Open": Open the form called frm_nueva_ventana .

When this button is pressed, it must be locked. Example: Abrir.Enabled = false;

Form frm_nueva_ventana :

Fields:

(1) RadioButton: Determines if the form button frm_snap_window is enabled.
(1) Button Finish: Close the current form (frm_nueva_ventana) and you must enable the form button frm_open_window strong>.

I was reviewing this question , but it does not apply to the situation I describe in my question.

The flow of the program is as follows:

Press the button Abrir of the form frm_open_window .

The OnClick event of the Abrir button opens an instance of the frm_new_window form and locks the Abrir button.

In the form frm_new_window , you can choose to select the RadioButton .

In the current frm_new_window form, press the Finalizar button, sending the checked (boolean) of the RadioButton to the first form that is, frm_open_window .

Set the value of the attribute Enabled to the button Abrir of the form frm_open_window .

To summarize, the problem I have at this moment is to send a boolean value between these two forms ; When the second form finishes its functionality, it must close and enable the Abrir button again.

This is my current code:

Form code frm_open_window :

/// Propiedad pública del formulario "para habilitar el botón (Abrir)".
public bool EstadoBoton { get; set; }

/// <summary>
/// Abrir segundo formulario (frm_nueva_ventana).
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnAbrir_Click(object sender, EventArgs e)
{
    frm_nueva_ventana frmNewVnt = new frm_nueva_ventana();
    frmNewVnt.Show();
    btnAbrir.Enabled = false;
}

Code frm_nueva_ventana :

/// <summary>
/// Cerrar actual formulario (frm_nueva_ventana) y enviar
/// el checked del RadioButton al botón del primer formulario.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnFinalizar_Click(object sender, EventArgs e)
{
    // frm_abrir_ventana aún está abierta y debe estarlo.
    // por lo que no sé tampoco cómo detectar este proceso.
    frm_abrir_ventana frmAbrVnt = new frm_abrir_ventana();
    frmAbrVnt.Show();
    frmAbrVtn.EstadoBoton = true;
}

How can I set this functionality correctly?

c# windows-forms

asked by Mauricio Arias Olave 19.08.2016 в 01:03

source

2 answers

2

You do not have to create a new instance of frm_abrir_ventana when you want to return to the parent window, you must use the existing instance

here Communicate Forms

I explain on the subject

but basically you must have the instance of the parent form (in this case frm_abrir_ventana ) from the form that you are opening frm_nueva_ventana to know where you have to send the data from one window to the other

The parent window sends its instance to the other form

public class frm_abrir_ventana
{
    public bool EstadoBoton { get; set; }


    private void btnAbrir_Click(object sender, EventArgs e)
    {
        frm_nueva_ventana frmNewVnt = new frm_nueva_ventana(this);
        frmNewVnt.Show();
        btnAbrir.Enabled = false;
    }

}

The daughter window receives the instance and uses it to send the data

public class frm_nueva_ventana
{
    private frm_abrir_ventana frmAbrVnt;

    public frm_nueva_ventana()
    {
        InitialComponente();
    }

    public frm_nueva_ventana(frm_abrir_ventana frm) : this()
    {
        this.frmAbrVnt = frm;
    }


    private void btnFinalizar_Click(object sender, EventArgs e)
    {
        frmAbrVtn.EstadoBoton = true;
        this.Close();
    }

}

observe how in the form constructor the instance is passed so as not to have to create a new one, thus being able to pass the value from one side to the other

answered by 19.08.2016 в 03:20

AJAX - Load values of .php in a select - Provinces Open new window with action inside li

score 3 · Accepted Answer

This may be a solution:

In the form frm_open_window

using System;
using System.Windows.Forms;

namespace NavigateForms
{
    public partial class frm_abrir_ventana : Form
    {
        public frm_abrir_ventana()
        {
            InitializeComponent();
        }

        private void btnAbrir_Click(object sender, EventArgs e)
        {
            //Instancia de la nueva ventana
            frm_nueva_ventana frmNuevaVentana = new frm_nueva_ventana();
            //Mostramos el formulario
            frmNuevaVentana.Show();
            //Pasamos la instancia actual de este formulario por un metodo publico que
            //contiene el formulario frmNuevaVentana
            frmNuevaVentana.getFrm(this);
            //Inhabilitamos el botón
            btnAbrir.Enabled = false;
        }

        /// <summary>
        /// Obtiene el valor boleano del checkbox del formulario frmNuevaVentana
        /// </summary>
        /// <param name="boleano"></param>
        public void getBoolean(bool boleano)
        {
            btnAbrir.Enabled = boleano;
        }
    }
}

In the form frm_new_window

using System;
using System.Windows.Forms;

namespace NavigateForms
{
    public partial class frm_nueva_ventana : Form
    {
        /// <summary>
        /// Esta variable de tipo frm_abrir_ventana nos servira para almacenar la instancia
        /// de la "pagina principal"
        /// </summary>
        frm_abrir_ventana formInstancia = null;

        public frm_nueva_ventana()
        {
            InitializeComponent();
        }

        private void btnFinalizar_Click(object sender, EventArgs e)
        {       
           //Llamamos al metodo publico que se encuentra en el formulario frm_abrir_ventana y pasamos
           //el valor del checkedbox
           formInstancia.getBoolean(checkB.Checked);

            //cerramos este formulario
           this.Close();         
        }

        /// <summary>
        /// Este metodo publico lo ocupamos en el formulario frm_abrir_ventana para poder pasar la instancia de la
        /// "pagina principal"
        /// </summary>
        /// <param name="form"></param>
        public void getFrm(frm_abrir_ventana form)
        {
            formInstancia = form;
        }
    }
}