Istruzioni: Ancorare e agganciare i controlli figlio in un controllo FlowLayoutPanel
Il controllo FlowLayoutPanel supporta le proprietà Anchor e Dock nei controlli figlio.
Per ancorare e adattare i controlli figlio in un controllo FlowLayoutPanel
Crea un controllo FlowLayoutPanel nel modulo.
Impostare il Width del controllo FlowLayoutPanel su 300e impostarne l'FlowDirection su TopDown.
Creare due controlli Button e inserirli nel controllo FlowLayoutPanel.
Imposta la Width del primo pulsante su 200.
Impostare la proprietà Dock del secondo pulsante su Fill.
Nota
Il secondo pulsante presuppone la stessa larghezza del primo pulsante. Non si estende sulla larghezza del controllo FlowLayoutPanel.
Imposta la proprietà Dock del secondo pulsante su
None. In questo modo il pulsante assume la larghezza originale.Impostare la proprietà Anchor del secondo pulsante su
Left, Right.Importante
Il secondo pulsante presuppone la stessa larghezza del primo pulsante. Non copre l'intera larghezza del controllo FlowLayoutPanel. Questa è la regola generale per l'ancoraggio e l'ormeggio nel controllo FlowLayoutPanel: per le direzioni del flusso verticale, il controllo FlowLayoutPanel calcola la larghezza di una colonna implicita a partire dal controllo figlio più ampio della colonna. Tutti gli altri controlli in questa colonna con proprietà Anchor o Dock sono allineati o estesi per adattarsi a tale colonna implicita. Il comportamento funziona in modo simile per le direzioni del flusso orizzontale. Il controllo FlowLayoutPanel calcola l'altezza di una riga implicita in base al controllo figlio più alto della riga, e tutti i controlli figlio ancorati o fissati in questa riga vengono allineati o ridimensionati per adattarsi alla riga implicita.
Esempio
La figura seguente mostra quattro pulsanti ancorati e attraccati rispetto al pulsante blu in un FlowLayoutPanel. Il FlowDirection è LeftToRight.
La figura seguente mostra quattro pulsanti ancorati e agganciati rispetto al pulsante blu in un FlowLayoutPanel. Il FlowDirection è TopDown.
Nell'esempio di codice seguente, sono illustrati i vari valori di proprietà Anchor per un controllo Button all'interno di un controllo FlowLayoutPanel.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
public class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private FlowLayoutPanel flowLayoutPanel3;
private Label label2;
private Button button11;
private Button button12;
private Button button13;
private Button button14;
private Button button15;
private FlowLayoutPanel flowLayoutPanel1;
private Label label1;
private Button button1;
private Button button2;
private Button button3;
private Button button4;
private Button button5;
private System.ComponentModel.IContainer components = null;
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
private void InitializeComponent()
{
this.flowLayoutPanel3 = new System.Windows.Forms.FlowLayoutPanel();
this.label2 = new System.Windows.Forms.Label();
this.button11 = new System.Windows.Forms.Button();
this.button12 = new System.Windows.Forms.Button();
this.button13 = new System.Windows.Forms.Button();
this.button14 = new System.Windows.Forms.Button();
this.button15 = new System.Windows.Forms.Button();
this.flowLayoutPanel1 = new System.Windows.Forms.FlowLayoutPanel();
this.label1 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.button5 = new System.Windows.Forms.Button();
this.flowLayoutPanel3.SuspendLayout();
this.flowLayoutPanel1.SuspendLayout();
this.SuspendLayout();
//
// flowLayoutPanel3
//
this.flowLayoutPanel3.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.flowLayoutPanel3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.flowLayoutPanel3.Controls.Add(this.label2);
this.flowLayoutPanel3.Controls.Add(this.button11);
this.flowLayoutPanel3.Controls.Add(this.button12);
this.flowLayoutPanel3.Controls.Add(this.button13);
this.flowLayoutPanel3.Controls.Add(this.button14);
this.flowLayoutPanel3.Controls.Add(this.button15);
this.flowLayoutPanel3.Location = new System.Drawing.Point(12, 12);
this.flowLayoutPanel3.Name = "flowLayoutPanel3";
this.flowLayoutPanel3.Size = new System.Drawing.Size(631, 100);
this.flowLayoutPanel3.TabIndex = 2;
//
// label2
//
this.label2.Anchor = System.Windows.Forms.AnchorStyles.None;
this.label2.AutoSize = true;
this.label2.Location = new System.Drawing.Point(3, 28);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(138, 14);
this.label2.TabIndex = 10;
this.label2.Text = "FlowDirection=LeftToRight";
//
// button11
//
this.button11.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
this.button11.AutoSize = true;
this.button11.Location = new System.Drawing.Point(147, 44);
this.button11.Name = "button11";
this.button11.Size = new System.Drawing.Size(86, 23);
this.button11.TabIndex = 5;
this.button11.Text = "Anchor=Bottom";
//
// button12
//
this.button12.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)));
this.button12.AutoSize = true;
this.button12.Location = new System.Drawing.Point(239, 3);
this.button12.Name = "button12";
this.button12.Size = new System.Drawing.Size(111, 64);
this.button12.TabIndex = 6;
this.button12.Text = "Anchor=Top, Bottom";
//
// button13
//
this.button13.Anchor = System.Windows.Forms.AnchorStyles.None;
this.button13.BackColor = System.Drawing.SystemColors.GradientActiveCaption;
this.button13.Location = new System.Drawing.Point(356, 3);
this.button13.Name = "button13";
this.button13.Size = new System.Drawing.Size(75, 64);
this.button13.TabIndex = 7;
//
// button14
//
this.button14.Dock = System.Windows.Forms.DockStyle.Bottom;
this.button14.Location = new System.Drawing.Point(437, 44);
this.button14.Name = "button14";
this.button14.TabIndex = 8;
this.button14.Text = "Dock=Bottom";
//
// button15
//
this.button15.Dock = System.Windows.Forms.DockStyle.Fill;
this.button15.Location = new System.Drawing.Point(518, 3);
this.button15.Name = "button15";
this.button15.Size = new System.Drawing.Size(75, 64);
this.button15.TabIndex = 9;
this.button15.Text = "Dock=Fill";
//
// flowLayoutPanel1
//
this.flowLayoutPanel1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.flowLayoutPanel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.flowLayoutPanel1.Controls.Add(this.label1);
this.flowLayoutPanel1.Controls.Add(this.button1);
this.flowLayoutPanel1.Controls.Add(this.button2);
this.flowLayoutPanel1.Controls.Add(this.button3);
this.flowLayoutPanel1.Controls.Add(this.button4);
this.flowLayoutPanel1.Controls.Add(this.button5);
this.flowLayoutPanel1.FlowDirection = System.Windows.Forms.FlowDirection.TopDown;
this.flowLayoutPanel1.Location = new System.Drawing.Point(12, 118);
this.flowLayoutPanel1.Name = "flowLayoutPanel1";
this.flowLayoutPanel1.Size = new System.Drawing.Size(200, 209);
this.flowLayoutPanel1.TabIndex = 3;
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(3, 3);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(128, 14);
this.label1.TabIndex = 11;
this.label1.Text = "FlowDirection=TopDown";
//
// button1
//
this.button1.Anchor = System.Windows.Forms.AnchorStyles.Right;
this.button1.Location = new System.Drawing.Point(74, 23);
this.button1.Name = "button1";
this.button1.TabIndex = 5;
this.button1.Text = "Anchor=Right";
//
// button2
//
this.button2.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
this.button2.Location = new System.Drawing.Point(3, 52);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(146, 23);
this.button2.TabIndex = 6;
this.button2.Text = "Anchor=Left, Right";
//
// button3
//
this.button3.BackColor = System.Drawing.SystemColors.GradientActiveCaption;
this.button3.Location = new System.Drawing.Point(3, 81);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(146, 23);
this.button3.TabIndex = 7;
//
// button4
//
this.button4.Dock = System.Windows.Forms.DockStyle.Right;
this.button4.Location = new System.Drawing.Point(74, 110);
this.button4.Name = "button4";
this.button4.TabIndex = 8;
this.button4.Text = "Dock=Right";
//
// button5
//
this.button5.Dock = System.Windows.Forms.DockStyle.Fill;
this.button5.Location = new System.Drawing.Point(3, 139);
this.button5.Name = "button5";
this.button5.Size = new System.Drawing.Size(146, 23);
this.button5.TabIndex = 9;
this.button5.Text = "Dock=Fill";
//
// Form1
//
this.ClientSize = new System.Drawing.Size(658, 341);
this.Controls.Add(this.flowLayoutPanel1);
this.Controls.Add(this.flowLayoutPanel3);
this.Name = "Form1";
this.Text = "Form1";
this.flowLayoutPanel3.ResumeLayout(false);
this.flowLayoutPanel3.PerformLayout();
this.flowLayoutPanel1.ResumeLayout(false);
this.flowLayoutPanel1.PerformLayout();
this.ResumeLayout(false);
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Drawing
Imports System.Windows.Forms
Public Class Form1
Inherits Form
Public Sub New()
InitializeComponent()
End Sub
Private flowLayoutPanel3 As FlowLayoutPanel
Private label2 As Label
Private button11 As Button
Private button12 As Button
Private button13 As Button
Private button14 As Button
Private button15 As Button
Private flowLayoutPanel1 As FlowLayoutPanel
Private label1 As Label
Private button1 As Button
Private button2 As Button
Private button3 As Button
Private button4 As Button
Private button5 As Button
Private components As System.ComponentModel.IContainer = Nothing
Protected Overrides Sub Dispose(disposing As Boolean)
If disposing AndAlso (components IsNot Nothing) Then
components.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
Private Sub InitializeComponent()
Me.flowLayoutPanel3 = New System.Windows.Forms.FlowLayoutPanel()
Me.label2 = New System.Windows.Forms.Label()
Me.button11 = New System.Windows.Forms.Button()
Me.button12 = New System.Windows.Forms.Button()
Me.button13 = New System.Windows.Forms.Button()
Me.button14 = New System.Windows.Forms.Button()
Me.button15 = New System.Windows.Forms.Button()
Me.flowLayoutPanel1 = New System.Windows.Forms.FlowLayoutPanel()
Me.label1 = New System.Windows.Forms.Label()
Me.button1 = New System.Windows.Forms.Button()
Me.button2 = New System.Windows.Forms.Button()
Me.button3 = New System.Windows.Forms.Button()
Me.button4 = New System.Windows.Forms.Button()
Me.button5 = New System.Windows.Forms.Button()
Me.flowLayoutPanel3.SuspendLayout()
Me.flowLayoutPanel1.SuspendLayout()
Me.SuspendLayout()
'
' flowLayoutPanel3
'
Me.flowLayoutPanel3.Anchor = CType(System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right, System.Windows.Forms.AnchorStyles)
Me.flowLayoutPanel3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
Me.flowLayoutPanel3.Controls.Add(Me.label2)
Me.flowLayoutPanel3.Controls.Add(Me.button11)
Me.flowLayoutPanel3.Controls.Add(Me.button12)
Me.flowLayoutPanel3.Controls.Add(Me.button13)
Me.flowLayoutPanel3.Controls.Add(Me.button14)
Me.flowLayoutPanel3.Controls.Add(Me.button15)
Me.flowLayoutPanel3.Location = New System.Drawing.Point(12, 12)
Me.flowLayoutPanel3.Name = "flowLayoutPanel3"
Me.flowLayoutPanel3.Size = New System.Drawing.Size(631, 100)
Me.flowLayoutPanel3.TabIndex = 2
'
' label2
'
Me.label2.Anchor = System.Windows.Forms.AnchorStyles.None
Me.label2.AutoSize = True
Me.label2.Location = New System.Drawing.Point(3, 28)
Me.label2.Name = "label2"
Me.label2.Size = New System.Drawing.Size(138, 14)
Me.label2.TabIndex = 10
Me.label2.Text = "FlowDirection=LeftToRight"
'
' button11
'
Me.button11.Anchor = System.Windows.Forms.AnchorStyles.Bottom
Me.button11.AutoSize = True
Me.button11.Location = New System.Drawing.Point(147, 44)
Me.button11.Name = "button11"
Me.button11.Size = New System.Drawing.Size(86, 23)
Me.button11.TabIndex = 5
Me.button11.Text = "Anchor=Bottom"
'
' button12
'
Me.button12.Anchor = CType(System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom, System.Windows.Forms.AnchorStyles)
Me.button12.AutoSize = True
Me.button12.Location = New System.Drawing.Point(239, 3)
Me.button12.Name = "button12"
Me.button12.Size = New System.Drawing.Size(111, 64)
Me.button12.TabIndex = 6
Me.button12.Text = "Anchor=Top, Bottom"
'
' button13
'
Me.button13.Anchor = System.Windows.Forms.AnchorStyles.None
Me.button13.BackColor = System.Drawing.SystemColors.GradientActiveCaption
Me.button13.Location = New System.Drawing.Point(356, 3)
Me.button13.Name = "button13"
Me.button13.Size = New System.Drawing.Size(75, 64)
Me.button13.TabIndex = 7
'
' button14
'
Me.button14.Dock = System.Windows.Forms.DockStyle.Bottom
Me.button14.Location = New System.Drawing.Point(437, 44)
Me.button14.Name = "button14"
Me.button14.TabIndex = 8
Me.button14.Text = "Dock=Bottom"
'
' button15
'
Me.button15.Dock = System.Windows.Forms.DockStyle.Fill
Me.button15.Location = New System.Drawing.Point(518, 3)
Me.button15.Name = "button15"
Me.button15.Size = New System.Drawing.Size(75, 64)
Me.button15.TabIndex = 9
Me.button15.Text = "Dock=Fill"
'
' flowLayoutPanel1
'
Me.flowLayoutPanel1.Anchor = CType(System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right, System.Windows.Forms.AnchorStyles)
Me.flowLayoutPanel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
Me.flowLayoutPanel1.Controls.Add(Me.label1)
Me.flowLayoutPanel1.Controls.Add(Me.button1)
Me.flowLayoutPanel1.Controls.Add(Me.button2)
Me.flowLayoutPanel1.Controls.Add(Me.button3)
Me.flowLayoutPanel1.Controls.Add(Me.button4)
Me.flowLayoutPanel1.Controls.Add(Me.button5)
Me.flowLayoutPanel1.FlowDirection = System.Windows.Forms.FlowDirection.TopDown
Me.flowLayoutPanel1.Location = New System.Drawing.Point(12, 118)
Me.flowLayoutPanel1.Name = "flowLayoutPanel1"
Me.flowLayoutPanel1.Size = New System.Drawing.Size(200, 209)
Me.flowLayoutPanel1.TabIndex = 3
'
' label1
'
Me.label1.AutoSize = True
Me.label1.Location = New System.Drawing.Point(3, 3)
Me.label1.Name = "label1"
Me.label1.Size = New System.Drawing.Size(128, 14)
Me.label1.TabIndex = 11
Me.label1.Text = "FlowDirection=TopDown"
'
' button1
'
Me.button1.Anchor = System.Windows.Forms.AnchorStyles.Right
Me.button1.Location = New System.Drawing.Point(74, 23)
Me.button1.Name = "button1"
Me.button1.TabIndex = 5
Me.button1.Text = "Anchor=Right"
'
' button2
'
Me.button2.Anchor = CType(System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right, System.Windows.Forms.AnchorStyles)
Me.button2.Location = New System.Drawing.Point(3, 52)
Me.button2.Name = "button2"
Me.button2.Size = New System.Drawing.Size(146, 23)
Me.button2.TabIndex = 6
Me.button2.Text = "Anchor=Left, Right"
'
' button3
'
Me.button3.BackColor = System.Drawing.SystemColors.GradientActiveCaption
Me.button3.Location = New System.Drawing.Point(3, 81)
Me.button3.Name = "button3"
Me.button3.Size = New System.Drawing.Size(146, 23)
Me.button3.TabIndex = 7
'
' button4
'
Me.button4.Dock = System.Windows.Forms.DockStyle.Right
Me.button4.Location = New System.Drawing.Point(74, 110)
Me.button4.Name = "button4"
Me.button4.TabIndex = 8
Me.button4.Text = "Dock=Right"
'
' button5
'
Me.button5.Dock = System.Windows.Forms.DockStyle.Fill
Me.button5.Location = New System.Drawing.Point(3, 139)
Me.button5.Name = "button5"
Me.button5.Size = New System.Drawing.Size(146, 23)
Me.button5.TabIndex = 9
Me.button5.Text = "Dock=Fill"
'
' Form1
'
Me.ClientSize = New System.Drawing.Size(658, 341)
Me.Controls.Add(flowLayoutPanel1)
Me.Controls.Add(flowLayoutPanel3)
Me.Name = "Form1"
Me.Text = "Form1"
Me.flowLayoutPanel3.ResumeLayout(False)
Me.flowLayoutPanel3.PerformLayout()
Me.flowLayoutPanel1.ResumeLayout(False)
Me.flowLayoutPanel1.PerformLayout()
Me.ResumeLayout(False)
End Sub
<STAThread()> _
Shared Sub Main()
Application.EnableVisualStyles()
Application.Run(New Form1())
End Sub
End Class
Compilazione del codice
Questo esempio richiede:
- Riferimenti agli assembly System, System.Data, System.Drawing e System.Windows.Forms.
Vedere anche
Collabora con noi su GitHub
L'origine di questo contenuto è disponibile in GitHub, in cui è anche possibile creare ed esaminare i problemi e le richieste pull. Per ulteriori informazioni, vedere la guida per i collaboratori.
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