Comment : manipuler des colonnes et des lignes à l'aide de ColumnDefinitionsCollections et RowDefinitionsCollections
Mise à jour : novembre 2007
Cet exemple montre comment utiliser les méthodes dans les classes ColumnDefinitionCollection et RowDefinitionCollection pour exécuter des actions, par exemple ajouter, effacer ou compter le contenu de lignes ou de colonnes. Par exemple, vous pouvez Add, Clear ou Count les éléments qui sont inclus dans ColumnDefinition ou RowDefinition. Pour afficher l'exemple complet, consultez Collections de lignes et de colonnes, exemple.
Exemple
L'exemple suivant crée un élément Grid avec le Namegrid1. La Grid contient un StackPanel qui maintient les éléments Button, chacun étant contrôlé par une méthode de collection différente. Lorsque vous cliquez sur un Button, il active un appel de méthode dans le fichier code-behind.
<Grid DockPanel.Dock="Top" HorizontalAlignment="Left" Name="grid1" ShowGridLines="true" Width="625" Height="400" Background="#b0e0e6">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
</Grid>
<StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Width="625" DockPanel.Dock="Top">
<Button Width="125" Click="addCol">Add Column</Button>
<Button Width="125" Click="addRow">Add Row</Button>
<Button Width="125" Click="clearCol">Clear All Columns</Button>
<Button Width="125" Click="clearRow">Clear All Rows</Button>
<Button Width="125" Click="removeCol">Remove One Column</Button>
</StackPanel>
<StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Width="625" DockPanel.Dock="Top">
<Button Width="125" Click="removeRow">Remove One Row</Button>
<Button Width="125" Click="colCount">How Many Columns?</Button>
<Button Width="125" Click="rowCount">How Many Rows?</Button>
<Button Width="125" Click="rem5Col">Remove 5 Columns</Button>
<Button Width="125" Click="rem5Row">Remove 5 Rows</Button>
</StackPanel>
<StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Width="625" DockPanel.Dock="Top">
<Button Width="125" Click="containsRow">Contains Row?</Button>
<Button Width="125" Click="containsCol">Contains Column?</Button>
<Button Width="125" Click="insertRowAt">Insert Row</Button>
<Button Width="125" Click="insertColAt">Insert Column</Button>
<Button Width="125" Click="colReadOnly">IsReadOnly?</Button>
</StackPanel>
Cet exemple définit une série de méthodes personnalisées, correspondant chacune à un événement Click dans le fichier XAML (Extensible Application Markup Language). Vous pouvez modifier le nombre de colonnes et de lignes de plusieurs façons dans la Grid, ce qui inclut l'ajout ou la suppression de lignes et de colonnes et le comptage du nombre total de lignes et de colonnes. Pour éviter les exceptions ArgumentOutOfRangeException et ArgumentException, vous pouvez utiliser la fonctionnalité de vérification des erreurs fournie par la méthode RemoveRange.
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Documents
Namespace SDKSample
'@ <summary>
'@ Interaction logic for Window1.xaml
'@ </summary>
Partial Public Class Window1
Inherits Window
Dim rowDef1 As New RowDefinition
Dim colDef1 As New ColumnDefinition
Private Sub addCol(ByVal sender As Object, ByVal e As RoutedEventArgs)
Dim colDef1 As New ColumnDefinition
grid1.ColumnDefinitions.Add(colDef1)
End Sub
Private Sub addRow(ByVal sender As Object, ByVal e As RoutedEventArgs)
Dim rowDef1 As New RowDefinition()
grid1.RowDefinitions.Add(rowDef1)
End Sub
Private Sub clearCol(ByVal sender As Object, ByVal e As RoutedEventArgs)
grid1.ColumnDefinitions.Clear()
End Sub
Private Sub clearRow(ByVal sender As Object, ByVal e As RoutedEventArgs)
grid1.RowDefinitions.Clear()
End Sub
Private Sub removeCol(ByVal sender As Object, ByVal e As RoutedEventArgs)
If (grid1.ColumnDefinitions.Count <= 0) Then
tp1.Text = "No More Columns to Remove!"
Else
grid1.ColumnDefinitions.RemoveAt(0)
End If
End Sub
Private Sub removeRow(ByVal sender As Object, ByVal e As RoutedEventArgs)
If (grid1.RowDefinitions.Count <= 0) Then
tp1.Text = "No More Rows to Remove!"
Else
grid1.RowDefinitions.RemoveAt(0)
End If
End Sub
Private Sub colCount(ByVal sender As Object, ByVal e As RoutedEventArgs)
tp2.Text = "The current number of Columns is: " + grid1.ColumnDefinitions.Count.ToString()
End Sub
Private Sub rowCount(ByVal sender As Object, ByVal e As RoutedEventArgs)
tp2.Text = "The current number of Rows is: " + grid1.RowDefinitions.Count.ToString()
End Sub
Private Sub rem5Col(ByVal sender As Object, ByVal e As RoutedEventArgs)
If (grid1.ColumnDefinitions.Count < 5) Then
tp1.Text = "There aren't five Columns to Remove!"
Else
grid1.ColumnDefinitions.RemoveRange(0, 5)
End If
End Sub
Private Sub rem5Row(ByVal sender As Object, ByVal e As RoutedEventArgs)
If (grid1.RowDefinitions.Count < 5) Then
tp1.Text = "There aren't five Rows to Remove!"
Else
grid1.RowDefinitions.RemoveRange(0, 5)
End If
End Sub
Private Sub containsRow(ByVal sender As Object, ByVal e As RoutedEventArgs)
If (grid1.RowDefinitions.Contains(rowDef1)) Then
tp2.Text = "Grid Contains RowDefinition rowDef1"
Else
tp2.Text = "Grid Does Not Contain RowDefinition rowDef1"
End If
End Sub
Private Sub containsCol(ByVal sender As Object, ByVal e As RoutedEventArgs)
If (grid1.ColumnDefinitions.Contains(colDef1)) Then
tp3.Text = "Grid Contains ColumnDefinition colDef1"
Else
tp3.Text = "Grid Does Not Contain ColumnDefinition colDef1"
End If
End Sub
Private Sub colReadOnly(ByVal sender As Object, ByVal e As RoutedEventArgs)
tp4.Text = "RowDefinitionsCollection IsReadOnly?: " + grid1.RowDefinitions.IsReadOnly.ToString()
tp5.Text = "ColumnDefinitionsCollection IsReadOnly?: " + grid1.ColumnDefinitions.IsReadOnly.ToString()
End Sub
Private Sub insertRowAt(ByVal sender As Object, ByVal e As RoutedEventArgs)
Dim rowDef1 As New RowDefinition
grid1.RowDefinitions.Insert(grid1.RowDefinitions.Count, rowDef1)
tp1.Text = "RowDefinition added at index position " + grid1.RowDefinitions.IndexOf(rowDef1).ToString()
End Sub
Private Sub insertColAt(ByVal sender As Object, ByVal e As RoutedEventArgs)
Dim colDef1 As New ColumnDefinition()
grid1.ColumnDefinitions.Insert(grid1.ColumnDefinitions.Count, colDef1)
tp2.Text = "ColumnDefinition added at index position " + grid1.ColumnDefinitions.IndexOf(colDef1).ToString()
End Sub
End Class
End Namespace
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
namespace columndefinitions_grid
{
public partial class Window1 : Window
{
RowDefinition rowDef1;
ColumnDefinition colDef1;
private void addCol(object sender, RoutedEventArgs e)
{
colDef1 = new ColumnDefinition();
grid1.ColumnDefinitions.Add(colDef1);
}
private void addRow(object sender, RoutedEventArgs e)
{
rowDef1 = new RowDefinition();
grid1.RowDefinitions.Add(rowDef1);
}
private void clearCol(object sender, RoutedEventArgs e)
{
grid1.ColumnDefinitions.Clear();
}
private void clearRow(object sender, RoutedEventArgs e)
{
grid1.RowDefinitions.Clear();
}
private void removeCol(object sender, RoutedEventArgs e)
{
if (grid1.ColumnDefinitions.Count <= 0)
{
tp1.Text = "No More Columns to Remove!";
}
else
{
grid1.ColumnDefinitions.RemoveAt(0);
}
}
private void removeRow(object sender, RoutedEventArgs e)
{
if (grid1.RowDefinitions.Count <= 0)
{
tp1.Text = "No More Rows to Remove!";
}
else
{
grid1.RowDefinitions.RemoveAt(0);
}
}
private void colCount(object sender, RoutedEventArgs e)
{
tp2.Text = "The current number of Columns is: " + grid1.ColumnDefinitions.Count;
}
private void rowCount(object sender, RoutedEventArgs e)
{
tp2.Text = "The current number of Rows is: " + grid1.RowDefinitions.Count;
}
private void rem5Col(object sender, RoutedEventArgs e)
{
if (grid1.ColumnDefinitions.Count < 5)
{
tp1.Text = "There aren't five Columns to Remove!";
}
else
{
grid1.ColumnDefinitions.RemoveRange(0,5);
}
}
private void rem5Row(object sender, RoutedEventArgs e)
{
if (grid1.RowDefinitions.Count < 5)
{
tp1.Text = "There aren't five Rows to Remove!";
}
else
{
grid1.RowDefinitions.RemoveRange(0, 5);
}
}
private void containsRow(object sender, RoutedEventArgs e)
{
if (grid1.RowDefinitions.Contains(rowDef1))
{
tp2.Text = "Grid Contains RowDefinition rowDef1";
}
else
{
tp2.Text = "Grid Does Not Contain RowDefinition rowDef1";
}
}
private void containsCol(object sender, RoutedEventArgs e)
{
if (grid1.ColumnDefinitions.Contains(colDef1))
{
tp3.Text = "Grid Contains ColumnDefinition colDef1";
}
else
{
tp3.Text = "Grid Does Not Contain ColumnDefinition colDef1";
}
}
private void colReadOnly(object sender, RoutedEventArgs e)
{
tp4.Text = "RowDefinitionsCollection IsReadOnly?: " + grid1.RowDefinitions.IsReadOnly.ToString();
tp5.Text = "ColumnDefinitionsCollection IsReadOnly?: " + grid1.ColumnDefinitions.IsReadOnly.ToString();
}
private void insertRowAt(object sender, RoutedEventArgs e)
{
rowDef1 = new RowDefinition();
grid1.RowDefinitions.Insert(grid1.RowDefinitions.Count, rowDef1);
tp1.Text = "RowDefinition added at index position " + grid1.RowDefinitions.IndexOf(rowDef1).ToString();
}
private void insertColAt(object sender, RoutedEventArgs e)
{
colDef1 = new ColumnDefinition();
grid1.ColumnDefinitions.Insert(grid1.ColumnDefinitions.Count, colDef1);
tp2.Text = "ColumnDefinition added at index position " + grid1.ColumnDefinitions.IndexOf(colDef1).ToString();
}
}
}