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Guide pratique pour activer l'affichage en mosaïque dans un contrôle ListView Windows Forms

Avec la fonctionnalité d'affichage en mosaïque du contrôle ListView, vous pouvez fournir un équilibre visuel entre les informations graphiques et textuelles. Les informations textuelles affichées pour un élément dans l'affichage en mosaïque sont identiques aux informations de colonne définies pour le mode Détails. L'affichage en mosaïque fonctionne en association avec les fonctionnalités de regroupement ou de marques d'insertion du contrôle ListView.

L'affichage en mosaïque utilise une icône de 32 x 32 pixels et plusieurs lignes de texte, comme illustré dans les images suivantes.

Tile View in a ListView Control

Pour activer l'affichage en mosaïque, affectez la valeur Tile à la propriété View. Vous pouvez ajuster la taille des mosaïques en définissant la propriété TileSize et le nombre de lignes de texte affichées dans la mosaïque en ajustant la collection Columns.

Pour définir l'affichage en mosaïque par programmation

  1. Utilisez l'énumération View du contrôle ListView.

    ListView1.View = View.Tile  
    
    listView1.View = View.Tile;  
    

Exemple

L'exemple de code complet suivant illustre l'affichage en mosaïque avec des mosaïques modifiées pour afficher trois lignes de texte. La taille des mosaïques a été ajustée pour empêcher le retour à la ligne.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;

public ref class ListViewTilingExample: public Form
{
private:
   ImageList^ myImageList;

public:
   ListViewTilingExample()
   {
      // Initialize myListView.
      ListView^ myListView = gcnew ListView;
      myListView->Dock = DockStyle::Fill;
      myListView->View = View::Tile;
      
      // Initialize the tile size.
      myListView->TileSize = System::Drawing::Size( 400, 45 );
      
      // Initialize the item icons.
      myImageList = gcnew ImageList;
      System::Drawing::Icon^ myIcon = gcnew System::Drawing::Icon( "book.ico" );
      try
      {
         myImageList->Images->Add( myIcon );
      }
      finally
      {
         if ( myIcon )
                  delete safe_cast<IDisposable^>(myIcon);
      }

      myImageList->ImageSize = System::Drawing::Size( 32, 32 );
      myListView->LargeImageList = myImageList;
      
      // Add column headers so the subitems will appear.
      array<ColumnHeader^>^temp0 = {gcnew ColumnHeader,gcnew ColumnHeader,gcnew ColumnHeader};
      myListView->Columns->AddRange( temp0 );
      
      // Create items and add them to myListView.
      array<String^>^temp1 = {"Programming Windows","Petzold, Charles","1998"};
      ListViewItem^ item0 = gcnew ListViewItem( temp1,0 );
      array<String^>^temp2 = {"Code: The Hidden Language of Computer Hardware and Software","Petzold, Charles","2000"};
      ListViewItem^ item1 = gcnew ListViewItem( temp2,0 );
      array<String^>^temp3 = {"Programming Windows with C#","Petzold, Charles","2001"};
      ListViewItem^ item2 = gcnew ListViewItem( temp3,0 );
      array<String^>^temp4 = {"Coding Techniques for Microsoft Visual Basic .NET","Connell, John","2001"};
      ListViewItem^ item3 = gcnew ListViewItem( temp4,0 );
      array<String^>^temp5 = {"C# for Java Developers","Jones, Allen & Freeman, Adam","2002"};
      ListViewItem^ item4 = gcnew ListViewItem( temp5,0 );
      array<String^>^temp6 = {"Microsoft .NET XML Web Services Step by Step","Jones, Allen & Freeman, Adam","2002"};
      ListViewItem^ item5 = gcnew ListViewItem( temp6,0 );
      array<ListViewItem^>^temp7 = {item0,item1,item2,item3,item4,item5};
      myListView->Items->AddRange( temp7 );
      
      // Initialize the form.
      this->Controls->Add( myListView );
      this->Size = System::Drawing::Size( 430, 330 );
      this->Text = "ListView Tiling Example";
   }

protected:

   // Clean up any resources being used.
   ~ListViewTilingExample()
   {
      if ( myImageList != nullptr )
      {
         delete myImageList;
      }
   }
};

[STAThread]
int main()
{
   Application::EnableVisualStyles();
   Application::Run( gcnew ListViewTilingExample );
}
using System;
using System.Drawing;
using System.Windows.Forms;

public class ListViewTilingExample : Form
{
    private ImageList myImageList;

    public ListViewTilingExample()
    {
        // Initialize myListView.
        ListView myListView = new ListView();
        myListView.Dock = DockStyle.Fill;
        myListView.View = View.Tile;

        // Initialize the tile size.
        myListView.TileSize = new Size(400, 45);

        // Initialize the item icons.
        myImageList = new ImageList();
        using (Icon myIcon = new Icon("book.ico"))
        {
            myImageList.Images.Add(myIcon);
        }
        myImageList.ImageSize = new Size(32, 32);
        myListView.LargeImageList = myImageList;

        // Add column headers so the subitems will appear.
        myListView.Columns.AddRange(new ColumnHeader[]
            {new ColumnHeader(), new ColumnHeader(), new ColumnHeader()});

        // Create items and add them to myListView.
        ListViewItem item0 = new ListViewItem( new string[]
            {"Programming Windows",
            "Petzold, Charles",
            "1998"}, 0 );
        ListViewItem item1 = new ListViewItem( new string[]
            {"Code: The Hidden Language of Computer Hardware and Software",
            "Petzold, Charles",
            "2000"}, 0 );
        ListViewItem item2 = new ListViewItem( new string[]
            {"Programming Windows with C#",
            "Petzold, Charles",
            "2001"}, 0 );
        ListViewItem item3 = new ListViewItem( new string[]
            {"Coding Techniques for Microsoft Visual Basic .NET",
            "Connell, John",
            "2001"}, 0 );
        ListViewItem item4 = new ListViewItem( new string[]
            {"C# for Java Developers",
            "Jones, Allen & Freeman, Adam",
            "2002"}, 0 );
        ListViewItem item5 = new ListViewItem( new string[]
            {"Microsoft .NET XML Web Services Step by Step",
            "Jones, Allen & Freeman, Adam",
            "2002"}, 0 );
        myListView.Items.AddRange(
            new ListViewItem[] {item0, item1, item2, item3, item4, item5});

        // Initialize the form.
        this.Controls.Add(myListView);
        this.Size = new System.Drawing.Size(430, 330);
        this.Text = "ListView Tiling Example";
    }

    // Clean up any resources being used.
    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            myImageList.Dispose();
        }
        base.Dispose(disposing);
    }

    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.Run(new ListViewTilingExample());
    }
}
Imports System.Drawing
Imports System.Windows.Forms

Public Class ListViewTilingExample
    Inherits Form
    
    Private myImageList As ImageList

    Public Sub New()
        ' Initialize myListView.
        Dim myListView As New ListView()
        myListView.Dock = DockStyle.Fill
        myListView.View = View.Tile
        
        ' Initialize the tile size.
        myListView.TileSize = new Size(400, 45)
        
        ' Initialize the item icons. 
        myImageList = New ImageList()
        Dim myIcon as Icon = new Icon("book.ico")
        Try
            myImageList.Images.Add(myIcon)
        Finally
            myIcon.Dispose()
        End Try
        myIcon.Dispose()
        myImageList.ImageSize = New Size(32, 32)
        myListView.LargeImageList = myImageList
        
        ' Add column headers so the subitems will appear.
        myListView.Columns.AddRange(New ColumnHeader() _
            {New ColumnHeader(), New ColumnHeader(), New ColumnHeader()})
        
        ' Create items and add them to myListView.
        Dim item0 As New ListViewItem( New String() _
            {"Programming Windows", _
            "Petzold, Charles", _
            "1998"}, 0 )
        Dim item1 As New ListViewItem( New String() _
            {"Code: The Hidden Language of Computer Hardware and Software", _
            "Petzold, Charles", _
            "2000"}, 0 )
        Dim item2 As New ListViewItem( New String() _
            {"Programming Windows with C#", _
            "Petzold, Charles", _
            "2001"}, 0 )
        Dim item3 As New ListViewItem( New String() _
            {"Coding Techniques for Microsoft Visual Basic .NET", _
            "Connell, John", _
            "2001"}, 0 )
        Dim item4 As New ListViewItem( New String() _
            {"C# for Java Developers", _
            "Jones, Allen / Freeman, Adam", _
            "2002"}, 0 )
        Dim item5 As New ListViewItem( New String() _
            {"Microsoft .NET XML Web Services Step by Step", _
            "Jones, Allen / Freeman, Adam", _
            "2002"}, 0 )
        myListView.Items.AddRange( _
            New ListViewItem() {item0, item1, item2, item3, item4, item5})
        
        ' Initialize the form.
        Me.Controls.Add(myListView)
        Me.Size = new System.Drawing.Size(430, 330)
        Me.Text = "ListView Tiling Example"
    End Sub
    
    ' Clean up any resources being used.        
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If (disposing) Then
            myImageList.Dispose()
        End If

        MyBase.Dispose(disposing)
    End Sub

    <STAThread()> _
    Shared Sub Main()
        Application.EnableVisualStyles()
        Application.Run(New ListViewTilingExample())
    End Sub

End Class

Compilation du code

Cet exemple nécessite :

  • des références aux assemblys System et System.Windows.Forms ;

  • un fichier d'icône nommé book.ico dans le même répertoire que le fichier exécutable.

Voir aussi