ValidationConstraints ValidationConstraints ValidationConstraints ValidationConstraints Enum

Definición

Define constantes que informan al método ValidateChildren(ValidationConstraints) sobre cómo debería validar los controles secundarios de un contenedor.Defines constants that inform ValidateChildren(ValidationConstraints) about how it should validate a container's child controls.

Esta enumeración tiene el atributo FlagsAttribute, que permite una combinación bit a bit de sus valores de miembro.

public enum class ValidationConstraints
[System.Flags]
public enum ValidationConstraints
type ValidationConstraints = 
Public Enum ValidationConstraints
Herencia
ValidationConstraintsValidationConstraintsValidationConstraintsValidationConstraints
Atributos

Campos

Enabled Enabled Enabled Enabled 2

Valida los controles secundarios cuya propiedad Enabled está establecida en true.Validates child controls whose Enabled property is set to true.

ImmediateChildren ImmediateChildren ImmediateChildren ImmediateChildren 16

Valida los controles secundarios que se hospedan directamente en el contenedor.Validates child controls that are directly hosted within the container. No valida ninguno de los elementos secundarios de estos controles secundarios.Does not validate any of the children of these children. Por ejemplo, si tiene un objeto Form que contiene un control UserControl personalizado y este control UserControl contiene a su vez un control Button, al utilizar ImmediateChildren, se desencadenará el evento Validating del control UserControl, pero no el evento Validating del control 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 None None None 0

Valida todos los controles secundarios y todos los elementos secundarios de estos controles secundarios, sin tener en cuenta los valores de sus propiedades.Validates all child controls, and all children of these child controls, regardless of their property settings.

Selectable Selectable Selectable Selectable 1

Valida los controles secundarios que se pueden seleccionar.Validates child controls that can be selected.

TabStop TabStop TabStop TabStop 8

Valida los controles secundarios que tienen un conjunto de valores TabStop, lo que significa que el usuario puede navegar al control utilizando la tecla 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 Visible Visible Visible 4

Valida los controles secundarios cuya propiedad Visible está establecida en true.Validates child controls whose Visible property is set to true.

Ejemplos

Solo hará que el siguiente ejemplo de código la Validating evento se desencadena para elementos secundarios inmediatos del formulario cuya propiedad Enabled propiedad es true.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 'Form1_Load


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


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


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


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


        Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
            Me.ValidateChildren((ValidationConstraints.ImmediateChildren Or ValidationConstraints.Enabled))
        End Sub 'Button1_Click
    End Class 'Form1
End Namespace 'ValidateChildrenWithConstraints

Comentarios

De forma predeterminada, ValidateChildren validará todos los controles habilitados en un contenedor, como un formulario.By default, ValidateChildren will validate all enabled controls in a container, such as a form. Utilice esta enumeración para restringir los tipos de controles cuya Validating provoca el evento.Use this enumeration to restrict the types of controls whose Validating event is raised.

Puede combinar estos valores enumerados junto con una operación OR bit a bit.You can combine these enumerated values together with a bitwise OR operation. Combinación de parámetros con un operador OR bit a bit dará como resultado una operación AND lógica.Combining parameters with a bitwise OR operator will result in a logical AND operation. Por ejemplo, al llamar a ValidateChildren(ValidationConstraints.ImmediateChildren | ValidationConstraints.Enabled) solo generará el Validating eventos de los controles que son elementos secundarios inmediatos del contenedor y están habilitadas.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 no especifica ImmediateChildren al llamar a ValidateChildren, el método requerirá que valide todos los controles secundarios en la jerarquía de controles.If you do not specify ImmediateChildren when you call ValidateChildren, the method will require that you validate all child controls in the control hierarchy.

Se aplica a

Consulte también: