ValidationConstraints Énumération

Définition

Définit des constantes qui informent ValidateChildren(ValidationConstraints) sur la validation des contrôles enfants d'un conteneur.Defines constants that inform ValidateChildren(ValidationConstraints) about how it should validate a container's child controls.

Cette énumération a un attribut FlagsAttribute qui permet une combinaison au niveau du bit de ses valeurs membres.

public enum class ValidationConstraints
[System.Flags]
public enum ValidationConstraints
type ValidationConstraints = 
Public Enum ValidationConstraints
Héritage
ValidationConstraints
Attributs

Champs

Enabled 2

Valide des contrôles enfants dont la propriété Enabled a la valeur true.Validates child controls whose Enabled property is set to true.

ImmediateChildren 16

Valide des contrôles enfants qui sont hébergés directement dans le conteneur.Validates child controls that are directly hosted within the container. Ne valide aucun des enfants de ces enfants.Does not validate any of the children of these children. Par exemple, si un Form qui contient un UserControl personnalisé et si UserControl contient un Button, l'utilisation de ImmediateChildren provoquera le déclenchement de l'événement Validating du UserControl mais pas de l'événement Validating du Button.For example, if you have a Form that contains a custom UserControl, and the UserControl contains a Button, using ImmediateChildren will cause the Validating event of the UserControl to occur, but not the Validating event of the Button.

None 0

Valide tous les contrôles enfants et tous les enfants de ces contrôles enfants, indépendamment des paramètres de leur propriété.Validates all child controls, and all children of these child controls, regardless of their property settings.

Selectable 1

Valide des contrôles enfants qui peuvent être sélectionnés.Validates child controls that can be selected.

TabStop 8

Valide des contrôles enfants ayant une valeur TabStop définie, ce qui signifie que l'utilisateur peut accéder au contrôle à l'aide de la touche TAB.Validates child controls that have a TabStop value set, which means that the user can navigate to the control using the TAB key.

Visible 4

Valide des contrôles enfants dont la propriété Visible a la valeur true.Validates child controls whose Visible property is set to true.

Exemples

L’exemple de code suivant provoquera uniquement Validating le déclenchement de l’événement pour les enfants immédiats Enabled du formulaire truedont la propriété a la valeur.The following code example will only cause the Validating event to be raised for immediate children of the form whose Enabled property is true.

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Windows.Forms;

namespace ValidateChildrenWithConstraints
{
    class Form1 : Form
    {
        public static void Main(string[] args)
        {
            Application.EnableVisualStyles();
            Application.Run(new Form1());
        }

        private Form1()
        {
            this.Load += new EventHandler(Form1_Load);
        }

        void Form1_Load(object sender, EventArgs e)
        {
            // Create controls on form.
            TextBox textBox1, textBox2, textBox3;
            FlowLayoutPanel flowPanel1;
            TextBox subTextBox1;
            Button button1;

            this.Size = new Size(500, 300);
            this.AutoValidate = AutoValidate.Disable;

            textBox1 = new TextBox();
            textBox1.Location = new Point(20, 20);
            textBox1.Size = new Size(75, textBox1.Size.Height);
            textBox1.CausesValidation = true;
            textBox1.Validating += new System.ComponentModel.CancelEventHandler(textBox1_Validating);
            this.Controls.Add(textBox1);

            textBox2 = new TextBox();
            textBox2.Location = new Point(105, 20);
            textBox2.Size = new Size(75, textBox2.Size.Height);
            textBox2.CausesValidation = true;
            textBox2.Validating += new System.ComponentModel.CancelEventHandler(textBox2_Validating);
            this.Controls.Add(textBox2);

            textBox3 = new TextBox();
            textBox3.Location = new Point(190, 20);
            textBox3.Size = new Size(75, textBox3.Size.Height);
            textBox3.Enabled = false;
            textBox3.CausesValidation = true;
            textBox3.Validating += new System.ComponentModel.CancelEventHandler(textBox3_Validating);
            this.Controls.Add(textBox3);

            button1 = new Button();
            button1.Text = "Click";
            button1.Location = new Point(270, 20);
            button1.Click += new EventHandler(button1_Click);
            this.Controls.Add(button1);

            flowPanel1 = new FlowLayoutPanel();
            flowPanel1.Size = new Size(400, 100);
            flowPanel1.Dock = DockStyle.Bottom;
            subTextBox1 = new TextBox();
            subTextBox1.CausesValidation = true;
            subTextBox1.Validating += new System.ComponentModel.CancelEventHandler(subTextBox1_Validating);
            flowPanel1.Controls.Add(subTextBox1);
            this.Controls.Add(flowPanel1);
        }

        void subTextBox1_Validating(object sender, System.ComponentModel.CancelEventArgs e)
        {
            MessageBox.Show("subTextBox1 Validating!");
        }

        void textBox1_Validating(object sender, System.ComponentModel.CancelEventArgs e)
        {
            MessageBox.Show("textBox1 Validating!");
        }

        void textBox2_Validating(object sender, System.ComponentModel.CancelEventArgs e)
        {
            MessageBox.Show("textBox2 Validating!");
        }

        void textBox3_Validating(object sender, System.ComponentModel.CancelEventArgs e)
        {
            MessageBox.Show("textBox3 Validating!");
        }

        void button1_Click(object sender, EventArgs e)
        {
            this.ValidateChildren(ValidationConstraints.ImmediateChildren | ValidationConstraints.Enabled);
        }
    }
}
Imports System.Drawing
Imports System.Windows.Forms

Namespace ValidateChildrenWithConstraints
    _
    Class Form1
        Inherits Form

        Public Overloads Shared Sub Main(ByVal args() As String)
            Application.EnableVisualStyles()
            Application.Run(New Form1())
        End Sub

        Private Sub New()
            AddHandler Me.Load, AddressOf Form1_Load
        End Sub

        Dim WithEvents TextBox1, TextBox2, TextBox3 As TextBox
        Dim FlowPanel1 As FlowLayoutPanel
        Dim WithEvents SubTextBox1 As TextBox
        Dim WithEvents Button1 As Button

        Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
            ' Create controls on form.

            Me.Size = New Size(500, 300)
            Me.AutoValidate = AutoValidate.Disable

            TextBox1 = New TextBox()
            TextBox1.Location = New Point(20, 20)
            TextBox1.Size = New Size(75, TextBox1.Size.Height)
            TextBox1.CausesValidation = True
            Me.Controls.Add(TextBox1)

            TextBox2 = New TextBox()
            TextBox2.Location = New Point(105, 20)
            TextBox2.Size = New Size(75, TextBox2.Size.Height)
            TextBox2.CausesValidation = True
            Me.Controls.Add(TextBox2)

            TextBox3 = New TextBox()
            TextBox3.Location = New Point(190, 20)
            TextBox3.Size = New Size(75, TextBox3.Size.Height)
            TextBox3.Enabled = False
            TextBox3.CausesValidation = True
            Me.Controls.Add(TextBox3)

            Button1 = New Button()
            Button1.Text = "Click"
            Button1.Location = New Point(270, 20)
            Me.Controls.Add(Button1)

            FlowPanel1 = New FlowLayoutPanel()
            FlowPanel1.Size = New Size(400, 100)
            FlowPanel1.Dock = DockStyle.Bottom
            SubTextBox1 = New TextBox()
            SubTextBox1.CausesValidation = True
            FlowPanel1.Controls.Add(SubTextBox1)
            Me.Controls.Add(FlowPanel1)
        End Sub


        Sub SubTextBox1_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles SubTextBox1.Validating
            MessageBox.Show("SubTextBox1 Validating!")
        End Sub


        Sub TextBox1_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles TextBox1.Validating
            MessageBox.Show("TextBox1 Validating!")
        End Sub


        Sub TextBox2_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles TextBox2.Validating
            MessageBox.Show("TextBox2 Validating!")
        End Sub


        Sub TextBox3_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles TextBox3.Validating
            MessageBox.Show("TextBox3 Validating!")
        End Sub


        Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
            Me.ValidateChildren((ValidationConstraints.ImmediateChildren Or ValidationConstraints.Enabled))
        End Sub
    End Class
End Namespace 'ValidateChildrenWithConstraints

Remarques

Par défaut, ValidateChildren valide tous les contrôles activés dans un conteneur, tel qu’un formulaire.By default, ValidateChildren will validate all enabled controls in a container, such as a form. Utilisez cette énumération pour restreindre les types de contrôles Validating dont l’événement est déclenché.Use this enumeration to restrict the types of controls whose Validating event is raised.

Vous pouvez combiner ces valeurs énumérées avec une opération or au niveau du bit.You can combine these enumerated values together with a bitwise OR operation. La combinaison de paramètres avec un opérateur de bits or entraîne une opération AND logique.Combining parameters with a bitwise OR operator will result in a logical AND operation. Par exemple, l' ValidateChildren(ValidationConstraints.ImmediateChildren | ValidationConstraints.Enabled) appel de déclenchera Validating uniquement l’événement sur les contrôles qui sont des enfants immédiats du conteneur et sont activés.For example, calling ValidateChildren(ValidationConstraints.ImmediateChildren | ValidationConstraints.Enabled) will only raise the Validating event on controls that are both immediate children of the container AND are enabled.

Si vous ne spécifiez pas ImmediateChildren lorsque vous ValidateChildrenappelez, la méthode exige que vous validiez tous les contrôles enfants dans la hiérarchie des contrôles.If you do not specify ImmediateChildren when you call ValidateChildren, the method will require that you validate all child controls in the control hierarchy.

S’applique à

Voir aussi