Freigeben über

ListView.ColumnHeaderCollection-Klasse

  • Artikel

Stellt die Auflistung von Spaltenköpfen in einem ListView-Steuerelement dar.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

Syntax

'Declaration
Public Class ColumnHeaderCollection
    Implements IList, ICollection, IEnumerable
'Usage
Dim instance As ColumnHeaderCollection

public class ColumnHeaderCollection : IList, ICollection, IEnumerable

public ref class ColumnHeaderCollection : IList, ICollection, IEnumerable

public class ColumnHeaderCollection implements IList, ICollection, 
    IEnumerable

public class ColumnHeaderCollection implements IList, ICollection, 
    IEnumerable

Hinweise

Eine ListView.ColumnHeaderCollection-Klasse speichert Spaltenköpfe, die im ListView-Steuerelement angezeigt werden, wenn die View-Eigenschaft auf Details festgelegt ist. Die ListView.ColumnHeaderCollection speichert ColumnHeader-Objekte, die den für eine Spalte anzuzeigenden Text und die Anzeige des Spaltenkopfes im ListView-Steuerelement definieren. Wenn eine ListView Spalten anzeigt, werden die Elemente und deren Unterelemente in getrennten Spalten angezeigt. Informationen zum Angeben, unter welchen Spalten Daten von Unterelementen angezeigt werden, finden Sie unter ListViewItem.ListViewSubItemCollection-Klasse.

Es gibt mehrere Möglichkeiten, der Auflistung Spalten hinzuzufügen: Mithilfe der Add-Methode wird der Auflistung ein einzelner Spaltenkopf hinzugefügt. Um der Auflistung mehrere Spaltenköpfe hinzuzufügen, wird ein Array von ColumnHeader-Objekten erstellt und an die AddRange-Methode übergeben. Wenn ein Spaltenkopf der Auflistung an einer bestimmten Position hinzugefügt werden soll, kann die Insert-Methode verwendet werden. Zum Entfernen von Spaltenköpfen kann die Remove-Methode oder die RemoveAt-Methode verwendet werden, sofern die Position des entsprechenden Spaltenkopfes bekannt ist. Im Gegensatz zur Remove-Methode, mit der jeweils nur ein Spaltenkopf entfernt werden kann, können mit der Clear-Methode sämtliche Spaltenköpfe gleichzeitig aus der Auflistung entfernt werden.

Neben den Methoden und Eigenschaften zum Hinzufügen und Entfernen von Spaltenköpfen enthält die ListView.ColumnHeaderCollection auch Methoden zum Suchen von Spaltenköpfen in der Auflistung. Mit der Contains-Methode können Sie bestimmen, ob ein Spaltenkopf ein Member der Auflistung ist. Wenn Sie wissen, dass sich der Spaltenkopf in der Auflistung befindet, können Sie die Position des der Spaltenkopfes in der Auflistung mithilfe der IndexOf-Methode ermitteln.

Hinweis

Wenn die kombinierte Breite aller Spalten 32.768 Pixel übersteigt, kann dies zu unerwartetem Verhalten führen.

Beispiel

Im folgenden Codebeispiel wird ein Formular mit einem ListView-Steuerelement erstellt, das Elemente manuell sortiert, wenn auf eine Spalte im ListView-Steuerelement geklickt wird. Das Beispiel definiert die Klasse ListViewItemComparer, die die System.Collections.IComparer-Schnittstelle implementiert, die den ListViewItem-Vergleich durchführt. Im folgenden Beispiel wird eine Instanz von ListViewItemComparer erstellt und zum Festlegen der ListViewItemSorter-Eigenschaft des ListView-Steuerelements verwendet. Der Sort-Methodenaufruf im ColumnClick-Ereignishandler verwendet die in ListViewItemComparer definierten Methoden, um die Elemente nach der Spalte zu sortieren, auf die geklickt wird.

Imports System
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Collections


Namespace ListViewSortFormNamespace

    Public Class ListViewSortForm
        Inherits Form

        Private listView1 As ListView

        Public Sub New()
            ' Create ListView items to add to the control.
            Dim listViewItem1 As New ListViewItem(New String() {"Banana", "a", "b", "c"}, -1, Color.Empty, Color.Yellow, Nothing)
            Dim listViewItem2 As New ListViewItem(New String() {"Cherry", "v", "g", "t"}, -1, Color.Empty, Color.Red, New Font("Microsoft Sans Serif", 8.25F, FontStyle.Regular, GraphicsUnit.Point, CType(0, System.Byte)))
            Dim listViewItem3 As New ListViewItem(New String() {"Apple", "h", "j", "n"}, -1, Color.Empty, Color.Lime, Nothing)
            Dim listViewItem4 As New ListViewItem(New String() {"Pear", "y", "u", "i"}, -1, Color.Empty, Color.FromArgb(CType(192, System.Byte), CType(128, System.Byte), CType(156, System.Byte)), Nothing)

            'Initialize the ListView control and add columns to it.
            Me.listView1 = New ListView

            ' Set the initial sorting type for the ListView.
            Me.listView1.Sorting = SortOrder.None
            ' Disable automatic sorting to enable manual sorting.
            Me.listView1.View = View.Details
            ' Add columns and set their text.
            Me.listView1.Columns.Add(New ColumnHeader)
            Me.listView1.Columns(0).Text = "Column 1"
            Me.listView1.Columns(0).Width = 100
            listView1.Columns.Add(New ColumnHeader)
            listView1.Columns(1).Text = "Column 2"
            listView1.Columns.Add(New ColumnHeader)
            listView1.Columns(2).Text = "Column 3"
            listView1.Columns.Add(New ColumnHeader)
            listView1.Columns(3).Text = "Column 4"
            ' Suspend control logic until form is done configuring form.
            Me.SuspendLayout()
            ' Add Items to the ListView control.
            Me.listView1.Items.AddRange(New ListViewItem() {listViewItem1, listViewItem2, listViewItem3, listViewItem4})
            ' Set the location and size of the ListView control.
            Me.listView1.Location = New Point(10, 10)
            Me.listView1.Name = "listView1"
            Me.listView1.Size = New Size(300, 100)
            Me.listView1.TabIndex = 0
            ' Enable editing of the items in the ListView.
            Me.listView1.LabelEdit = True
            ' Connect the ListView.ColumnClick event to the ColumnClick event handler.
            AddHandler Me.listView1.ColumnClick, AddressOf ColumnClick

            ' Initialize the form.
            Me.ClientSize = New Size(400, 400)
            Me.Controls.AddRange(New Control() {Me.listView1})
            Me.Name = "ListViewSortForm"
            Me.Text = "Sorted ListView Control"
            ' Resume layout of the form.
            Me.ResumeLayout(False)
        End Sub 'New


        ' ColumnClick event handler.
        Private Sub ColumnClick(ByVal o As Object, ByVal e As ColumnClickEventArgs)
            ' Set the ListViewItemSorter property to a new ListViewItemComparer 
            ' object. Setting this property immediately sorts the 
            ' ListView using the ListViewItemComparer object.
            Me.listView1.ListViewItemSorter = New ListViewItemComparer(e.Column)
        End Sub

    End Class

    ' Implements the manual sorting of items by columns.
    Class ListViewItemComparer
        Implements IComparer

        Private col As Integer

        Public Sub New()
            col = 0
        End Sub

        Public Sub New(ByVal column As Integer)
            col = column
        End Sub

        Public Function Compare(ByVal x As Object, ByVal y As Object) As Integer _
           Implements IComparer.Compare
            Return [String].Compare(CType(x, ListViewItem).SubItems(col).Text, CType(y, ListViewItem).SubItems(col).Text)
        End Function
    End Class
End Namespace

using System;
using System.Windows.Forms;
using System.Drawing;
using System.Collections;

namespace ListViewSortFormNamespace
{
    
   
    public class ListViewSortForm : Form
    {
        private ListView listView1;
       
        public ListViewSortForm()
        {
            // Create ListView items to add to the control.
            ListViewItem listViewItem1 = new ListViewItem(new string[] {"Banana","a","b","c"}, -1, Color.Empty, Color.Yellow, null);
            ListViewItem listViewItem2 = new ListViewItem(new string[] {"Cherry","v","g","t"}, -1, Color.Empty, Color.Red, new Font("Microsoft Sans Serif", 8.25F, FontStyle.Regular, GraphicsUnit.Point, ((System.Byte)(0))));
            ListViewItem listViewItem3 = new ListViewItem(new string[] {"Apple","h","j","n"}, -1, Color.Empty, Color.Lime, null);
            ListViewItem listViewItem4 = new ListViewItem(new string[] {"Pear","y","u","i"}, -1, Color.Empty, Color.FromArgb(((System.Byte)(192)), ((System.Byte)(128)), ((System.Byte)(156))), null);
     
            //Initialize the ListView control and add columns to it.
            this.listView1 = new ListView();

            // Set the initial sorting type for the ListView.
            this.listView1.Sorting = SortOrder.None;
            // Disable automatic sorting to enable manual sorting.
            this.listView1.View = View.Details;
            // Add columns and set their text.
            this.listView1.Columns.Add(new ColumnHeader());
            this.listView1.Columns[0].Text = "Column 1";
            this.listView1.Columns[0].Width = 100;
            listView1.Columns.Add(new ColumnHeader());
            listView1.Columns[1].Text = "Column 2";
            listView1.Columns.Add(new ColumnHeader());
            listView1.Columns[2].Text = "Column 3";
            listView1.Columns.Add(new ColumnHeader());
            listView1.Columns[3].Text = "Column 4";
            // Suspend control logic until form is done configuring form.
            this.SuspendLayout();
            // Add Items to the ListView control.
            this.listView1.Items.AddRange(new ListViewItem[] {listViewItem1,
                listViewItem2,
                listViewItem3,
                listViewItem4});
            // Set the location and size of the ListView control.
            this.listView1.Location = new Point(10, 10);
            this.listView1.Name = "listView1";
            this.listView1.Size = new Size(300, 100);
            this.listView1.TabIndex = 0;
            // Enable editing of the items in the ListView.
            this.listView1.LabelEdit = true;
            // Connect the ListView.ColumnClick event to the ColumnClick event handler.
            this.listView1.ColumnClick += new ColumnClickEventHandler(ColumnClick);
            
            // Initialize the form.
            this.ClientSize = new Size(400, 400);
            this.Controls.AddRange(new Control[] {this.listView1});
            this.Name = "ListViewSortForm";
            this.Text = "Sorted ListView Control";
            // Resume layout of the form.
            this.ResumeLayout(false);
        }
        
    
        // ColumnClick event handler.
        private void ColumnClick(object o, ColumnClickEventArgs e)
        {
            // Set the ListViewItemSorter property to a new ListViewItemComparer 
            // object. Setting this property immediately sorts the 
            // ListView using the ListViewItemComparer object.
            this.listView1.ListViewItemSorter = new ListViewItemComparer(e.Column);
        }

        [System.STAThreadAttribute()]
        public static void Main()
        {
            Application.Run(new ListViewSortForm());
        }

    }

    // Implements the manual sorting of items by columns.
    class ListViewItemComparer : IComparer
    {
        private int col;
        public ListViewItemComparer()
        {
            col = 0;
        }
        public ListViewItemComparer(int column)
        {
            col = column;
        }
        public int Compare(object x, object y)
        {
            return String.Compare(((ListViewItem)x).SubItems[col].Text, ((ListViewItem)y).SubItems[col].Text);
        }
    }

}

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

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

// Implements the manual sorting of items by columns.
ref class ListViewItemComparer: public IComparer
{
private:
   int col;

public:
   ListViewItemComparer()
   {
      col = 0;
   }

   ListViewItemComparer( int column )
   {
      col = column;
   }

   virtual int Compare( Object^ x, Object^ y )
   {
      return String::Compare( (dynamic_cast<ListViewItem^>(x))->SubItems[ col ]->Text,
                              (dynamic_cast<ListViewItem^>(y))->SubItems[ col ]->Text );
   }
};

public ref class ListViewSortForm: public Form
{
private:
   ListView^ listView1;

public:
   ListViewSortForm()
   {
      // Create ListView items to add to the control.
      array<String^>^temp0 = {"Banana","a","b","c"};
      ListViewItem^ listViewItem1 = gcnew ListViewItem( temp0,-1,Color::Empty,Color::Yellow,nullptr );
      array<String^>^temp1 = {"Cherry","v","g","t"};
      ListViewItem^ listViewItem2 = gcnew ListViewItem( temp1,-1,Color::Empty,Color::Red,
                 gcnew System::Drawing::Font( "Microsoft Sans Serif",8.25F,FontStyle::Regular,GraphicsUnit::Point,0 ) );
      array<String^>^temp2 = {"Apple","h","j","n"};
      ListViewItem^ listViewItem3 = gcnew ListViewItem( temp2,-1,Color::Empty,Color::Lime,nullptr );
      array<String^>^temp3 = {"Pear","y","u","i"};
      ListViewItem^ listViewItem4 = gcnew ListViewItem( temp3,-1,Color::Empty,Color::FromArgb( 192, 128, 156 ),nullptr );

      //Initialize the ListView control and add columns to it.
      this->listView1 = gcnew ListView;

      // Set the initial sorting type for the ListView.
      this->listView1->Sorting = SortOrder::None;

      // Disable automatic sorting to enable manual sorting.
      this->listView1->View = View::Details;

      // Add columns and set their text.
      this->listView1->Columns->Add( gcnew ColumnHeader );
      this->listView1->Columns[ 0 ]->Text = "Column 1";
      this->listView1->Columns[ 0 ]->Width = 100;
      listView1->Columns->Add( gcnew ColumnHeader );
      listView1->Columns[ 1 ]->Text = "Column 2";
      listView1->Columns->Add( gcnew ColumnHeader );
      listView1->Columns[ 2 ]->Text = "Column 3";
      listView1->Columns->Add( gcnew ColumnHeader );
      listView1->Columns[ 3 ]->Text = "Column 4";

      // Suspend control logic until form is done configuring form.
      this->SuspendLayout();

      // Add Items to the ListView control.
      array<ListViewItem^>^temp4 = {listViewItem1,listViewItem2,listViewItem3,listViewItem4};
      this->listView1->Items->AddRange( temp4 );

      // Set the location and size of the ListView control.
      this->listView1->Location = Point(10,10);
      this->listView1->Name = "listView1";
      this->listView1->Size = System::Drawing::Size( 300, 100 );
      this->listView1->TabIndex = 0;

      // Enable editing of the items in the ListView.
      this->listView1->LabelEdit = true;

      // Connect the ListView::ColumnClick event to the ColumnClick event handler.
      this->listView1->ColumnClick += gcnew ColumnClickEventHandler( this, &ListViewSortForm::ColumnClick );

      // Initialize the form.
      this->ClientSize = System::Drawing::Size( 400, 400 );
      array<Control^>^temp5 = {this->listView1};
      this->Controls->AddRange( temp5 );
      this->Name = "ListViewSortForm";
      this->Text = "Sorted ListView Control";

      // Resume lay[Out] of* the form.
      this->ResumeLayout( false );
   }

private:

   // ColumnClick event handler.
   void ColumnClick( Object^ /*o*/, ColumnClickEventArgs^ e )
   {
      // Set the ListViewItemSorter property to a new ListViewItemComparer 
      // object. Setting this property immediately sorts the 
      // ListView using the ListViewItemComparer object.
      this->listView1->ListViewItemSorter = gcnew ListViewItemComparer( e->Column );
   }
};

[System::STAThreadAttribute]
int main()
{
   Application::Run( gcnew ListViewSortForm );
}

package ListViewSortFormNamespace;

import System.*;
import System.Windows.Forms.*;
import System.Drawing.*;
import System.Collections.*;

public class ListViewSortForm extends Form
{
    private ListView listView1;

    public ListViewSortForm()
    {
        // Create ListView items to add to the control.
        ListViewItem listViewItem1 = new ListViewItem(new String[] { "Banana", 
            "a", "b", "c" }, -1, Color.Empty, Color.get_Yellow(), null);
        ListViewItem listViewItem2 = new ListViewItem(new String[] { "Cherry", 
            "v", "g", "t" }, -1, Color.Empty, Color.get_Red(), 
            new Font("Microsoft Sans Serif", (float)8.25, FontStyle.Regular, 
            GraphicsUnit.Point, (ubyte)0));
        ListViewItem listViewItem3 = new ListViewItem(new String[] { "Apple", 
            "h", "j", "n" }, -1, Color.Empty, Color.get_Lime(), null);
        ListViewItem listViewItem4 = new ListViewItem(new String[] { "Pear", 
            "y", "u", "i" }, -1, Color.Empty, Color.FromArgb(192, 128, 156), 
            null);

        //Initialize the ListView control and add columns to it.
        this.listView1 = new ListView();

        // Set the initial sorting type for the ListView.
        this.listView1.set_Sorting(SortOrder.None);

        // Disable automatic sorting to enable manual sorting.
        this.listView1.set_View(View.Details);

        // Add columns and set their text.
        this.listView1.get_Columns().Add(new ColumnHeader());
        this.listView1.get_Columns().get_Item(0).set_Text("Column 1");
        this.listView1.get_Columns().get_Item(0).set_Width(100);
        listView1.get_Columns().Add(new ColumnHeader());
        listView1.get_Columns().get_Item(1).set_Text("Column 2");
        listView1.get_Columns().Add(new ColumnHeader());
        listView1.get_Columns().get_Item(2).set_Text("Column 3");
        listView1.get_Columns().Add(new ColumnHeader());
        listView1.get_Columns().get_Item(3).set_Text("Column 4");

        // Suspend control logic until form is done configuring form.
        this.SuspendLayout();

        // Add Items to the ListView control.
        this.listView1.get_Items().AddRange(new ListViewItem[] { listViewItem1,
            listViewItem2, listViewItem3, listViewItem4 });

        // Set the location and size of the ListView control.
        this.listView1.set_Location(new Point(10, 10));
        this.listView1.set_Name("listView1");
        this.listView1.set_Size(new Size(300, 100));
        this.listView1.set_TabIndex(0);

        // Enable editing of the items in the ListView.
        this.listView1.set_LabelEdit(true);

        // Connect the ListView.ColumnClick event to the 
        // ColumnClick event handler.
        this.listView1.add_ColumnClick(new ColumnClickEventHandler(ColumnClick));

        // Initialize the form.
        this.set_ClientSize(new Size(400, 400));
        this.get_Controls().AddRange(new Control[] { this.listView1 });
        this.set_Name("ListViewSortForm");
        this.set_Text("Sorted ListView Control");

        // Resume layout of the form.
        this.ResumeLayout(false);
    } //ListViewSortForm

    // ColumnClick event handler.
    private void ColumnClick(Object o, ColumnClickEventArgs e)
    {
        // Set the ListViewItemSorter property to a new ListViewItemComparer 
        // object. Setting this property immediately sorts the 
        // ListView using the ListViewItemComparer object.
        this.listView1.set_ListViewItemSorter(
            new ListViewItemComparer(e.get_Column()));
    } //ColumnClick

    /** @attribute System.STAThreadAttribute()
     */
    public static void main(String[] args)
    {
        Application.Run(new ListViewSortForm());
    } //main
} //ListViewSortForm

// Implements the manual sorting of items by columns.
class ListViewItemComparer implements IComparer
{
    private int col;

    public ListViewItemComparer()
    {
        col = 0;
    } //ListViewItemComparer

    public ListViewItemComparer(int column)
    {
        col = column;
    } //ListViewItemComparer

    public int Compare(Object x, Object y)
    {
        return String.Compare(
            ((ListViewItem)x).get_SubItems().get_Item(col).get_Text(),
            ((ListViewItem)y).get_SubItems().get_Item(col).get_Text());
    } //Compare
} //ListViewItemComparer

Vererbungshierarchie

System.Object
  System.Windows.Forms.ListView.ColumnHeaderCollection

Threadsicherheit

Alle öffentlichen statischen (Shared in Visual Basic) Member dieses Typs sind threadsicher. Bei Instanzmembern ist die Threadsicherheit nicht gewährleistet.

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

.NET Compact Framework

Unterstützt in: 2.0, 1.0

Siehe auch

Referenz

ListView.ColumnHeaderCollection-Member
System.Windows.Forms-Namespace