SearchDirectionHint SearchDirectionHint SearchDirectionHint SearchDirectionHint Enum

Définition

Fournit un conseil directionnel où rechercher un ListViewItem.Provides a directional hint of where to search for a ListViewItem.

public enum class SearchDirectionHint
public enum SearchDirectionHint
type SearchDirectionHint = 
Public Enum SearchDirectionHint
Héritage
SearchDirectionHintSearchDirectionHintSearchDirectionHintSearchDirectionHint

Champs

Down Down Down Down 40

En dessous de l'élément actuel.Below the current item.

Left Left Left Left 37

À gauche de l'élément actuelTo the left of the current item

Right Right Right Right 39

À droite de l'élément actuelTo the right of the current item.

Up Up Up Up 38

Au-dessus de l'élément actuel.Above the current item.

Exemples

L’exemple de code suivant montre comment utiliser le SearchDirectionHint énumération.The following code example demonstrates how to use the SearchDirectionHint enumeration. Pour exécuter cet exemple, collez le code suivant dans un Windows Form et appelez InitializeLocationSearchListView à partir du constructeur du formulaire ou Load méthode de gestion des événements.To run this example, paste the following code into a Windows Form and call InitializeLocationSearchListView from the form's constructor or Load event-handling method.

    ListView^ iconListView;
    TextBox^ previousItemBox;

private:
    void InitializeLocationSearchListView()
    {
        previousItemBox = gcnew TextBox();
        iconListView = gcnew ListView();
        previousItemBox->Location = Point(150, 20);

        // Create an image list for the icon ListView.
        iconListView->SmallImageList = gcnew ImageList();

        // Add an image to the ListView small icon list.
        iconListView->SmallImageList->Images->Add(
            gcnew Bitmap(Control::typeid, "Edit.bmp"));

        // Set the view to small icon and add some items with the image
        // in the image list.
        iconListView->View = View::SmallIcon;
        iconListView->Items->AddRange(gcnew array<ListViewItem^>{
            gcnew ListViewItem("Amy Alberts", 0),
            gcnew ListViewItem("Amy Recker", 0),
            gcnew ListViewItem("Erin Hagens", 0),
            gcnew ListViewItem("Barry Johnson", 0),
            gcnew ListViewItem("Jay Hamlin", 0),
            gcnew ListViewItem("Brian Valentine", 0),
            gcnew ListViewItem("Brian Welker", 0),
            gcnew ListViewItem("Daniel Weisman", 0) });
         this->Controls->Add(iconListView);
         this->Controls->Add(previousItemBox);

         // Handle the MouseDown event to capture user input.
         iconListView->MouseDown += gcnew MouseEventHandler(
             this, &Form1::iconListView_MouseDown);
    }

    void iconListView_MouseDown(Object^ sender, MouseEventArgs^ e)
    {
        // Find the next item up from where the user clicked.
        ListViewItem^ foundItem = iconListView->FindNearestItem(
            SearchDirectionHint::Up, e->X, e->Y);

        // Display the results in a textbox..
        if (foundItem != nullptr)
        {
            previousItemBox->Text = foundItem->Text;
        }
        else
        {
            previousItemBox->Text = "No item found";
        }
    }
ListView iconListView = new ListView();
TextBox previousItemBox = new TextBox();

private void InitializeLocationSearchListView()
{
    previousItemBox.Location = new Point(150, 20);

    // Create an image list for the icon ListView.
    iconListView.LargeImageList = new ImageList();
    iconListView.Height = 400;
    
    // Add an image to the ListView large icon list.
    iconListView.LargeImageList.Images.Add(
        new Bitmap(typeof(Control), "Edit.bmp"));

    // Set the view to large icon and add some items with the image
    // in the image list.
    iconListView.View = View.LargeIcon;
    iconListView.Items.AddRange(new ListViewItem[]{
        new ListViewItem("Amy Alberts", 0), 
        new ListViewItem("Amy Recker", 0), 
        new ListViewItem("Erin Hagens", 0), 
        new ListViewItem("Barry Johnson", 0), 
        new ListViewItem("Jay Hamlin", 0), 
        new ListViewItem("Brian Valentine", 0), 
        new ListViewItem("Brian Welker", 0), 
        new ListViewItem("Daniel Weisman", 0) });
    this.Controls.Add(iconListView);
    this.Controls.Add(previousItemBox);

    // Handle the MouseDown event to capture user input.
   iconListView.MouseDown +=
       new MouseEventHandler(iconListView_MouseDown);
    //iconListView.MouseWheel += new MouseEventHandler(iconListView_MouseWheel);   
}

void iconListView_MouseDown(object sender, MouseEventArgs e)
{
    
    // Find the an item above where the user clicked.
    ListViewItem foundItem =
        iconListView.FindNearestItem(SearchDirectionHint.Up, e.X, e.Y);

    // Display the results in a textbox..
    if (foundItem != null)
        previousItemBox.Text = foundItem.Text;
    else
        previousItemBox.Text = "No item found";
}
Private WithEvents iconListView As New ListView()
Private previousItemBox As New TextBox()


Private Sub InitializeLocationSearchListView()
    previousItemBox.Location = New Point(150, 20)

    ' Create an image list for the icon ListView.
    iconListView.LargeImageList = New ImageList()

    ' Add an image to the ListView large icon list.
    iconListView.LargeImageList.Images.Add(New Bitmap(GetType(Control), "Edit.bmp"))

    ' Set the view to large icon and add some items with the image
    ' in the image list.
    iconListView.View = View.SmallIcon
    iconListView.Items.AddRange(New ListViewItem() { _
        New ListViewItem("Amy Alberts", 0), _
        New ListViewItem("Amy Recker", 0), _
        New ListViewItem("Erin Hagens", 0), _
        New ListViewItem("Barry Johnson", 0), _
        New ListViewItem("Jay Hamlin", 0), _
        New ListViewItem("Brian Valentine", 0), _
        New ListViewItem("Brian Welker", 0), _
        New ListViewItem("Daniel Weisman", 0)})

    Me.Controls.Add(iconListView)
    Me.Controls.Add(previousItemBox)
End Sub

Sub iconListView_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs) _
    Handles iconListView.MouseDown

    ' Find the next item up from where the user clicked.
    Dim foundItem As ListViewItem = _
    iconListView.FindNearestItem(SearchDirectionHint.Up, e.X, e.Y)

    ' Display the results in a textbox.
    If (foundItem IsNot Nothing) Then
        previousItemBox.Text = foundItem.Text
    Else
        previousItemBox.Text = "No item found"
    End If


End Sub

Remarques

Cette énumération est utilisée par le FindNearestItem méthodes dans le ListView et ListViewItem des classes, ainsi que par la SearchForVirtualItemEventArgs classe.This enumeration is used by the FindNearestItem methods in the ListView and ListViewItem classes, as well as by the SearchForVirtualItemEventArgs class. Identification de l’élément le plus proche dans un ListView contrôle peut varier selon le système d’exploitation que l’application est en cours d’exécution ; par conséquent, le sens de la recherche est une indication et pas une garantie absolue de résultats.Identifying the nearest item in a ListView control can vary depending on the operating system the application is running on; therefore, the search direction is a hint, and not an absolute guarantee of results.

S’applique à