ColumnHeader-Klasse
Zeigt einen einzelnen Spaltenkopf in einem ListView-Steuerelement an.
Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Syntax
'Declaration
Public Class ColumnHeader
Inherits Component
Implements ICloneable
'Usage
Dim instance As ColumnHeader
public class ColumnHeader : Component, ICloneable
public ref class ColumnHeader : public Component, ICloneable
public class ColumnHeader extends Component implements ICloneable
public class ColumnHeader extends Component implements ICloneable
Hinweise
Ein Spaltenkopf ist ein Element in einem ListView-Steuerelement, das einen Überschriftentext enthält. ColumnHeader-Objekte fügen Sie ListView mithilfe der Add-Methode der ListView.ColumnHeaderCollection-Klasse hinzu. Um einer ListView eine Gruppe von Spalten hinzuzufügen, verwenden Sie die AddRange-Methode der ListView.ColumnHeaderCollection-Klasse. Mithilfe der Index-Eigenschaft der ColumnHeader-Klasse können Sie die Position ermitteln, an der sich der ColumnHeader in der ListView.ColumnHeaderCollection befindet.
ColumnHeader stellt die Text-Eigenschaft und die TextAlign-Eigenschaft bereit, um den im Steuerelement angezeigten Text sowie die Ausrichtung des Texts im Spaltenkopf festzulegen. Um zu bestimmen, ob ColumnHeader einem ListView-Steuerelement zugeordnet ist, können Sie auf die ListView-Eigenschaft verweisen. Wenn Sie einen ColumnHeader für die Verwendung in einem anderen ListView-Steuerelement kopieren möchten, können Sie die Clone-Methode verwenden.
Beispiel
Im folgenden Codebeispiel wird das Initialisieren eines ListView-Steuerelements veranschaulicht. Im Beispiel werden ColumnHeader-Objekte erstellt und die Eigenschaften Text, TextAlign und Width des Spaltenheaders festgelegt. Im Beispiel werden der ListView auch Elemente und Unterelemente hinzugefügt. Zum Ausführen dieses Beispiels fügen Sie folgenden Code in ein Formular ein, und rufen Sie die PopulateListView-Methode im Konstruktor oder im Load-Ereignishandler des Formulars auf.
Private Sub PopulateListView()
ListView1.Width = 270
ListView1.Location = New System.Drawing.Point(10, 10)
' Declare and construct the ColumnHeader objects.
Dim header1, header2 As ColumnHeader
header1 = New ColumnHeader
header2 = New ColumnHeader
' Set the text, alignment and width for each column header.
header1.Text = "File name"
header1.TextAlign = HorizontalAlignment.Left
header1.Width = 70
header2.TextAlign = HorizontalAlignment.Left
header2.Text = "Location"
header2.Width = 200
' Add the headers to the ListView control.
ListView1.Columns.Add(header1)
ListView1.Columns.Add(header2)
' Populate the ListView.Items property.
' Set the directory to the sample picture directory.
Dim dirInfo As New System.IO.DirectoryInfo _
("C:\Documents and Settings\All Users" _
& "\Documents\My Pictures\Sample Pictures")
Dim file As System.IO.FileInfo
' Get the .jpg files from the directory
Dim files() As System.io.FileInfo = dirInfo.GetFiles("*.jpg")
' Add each file name and full name including path
' to the ListView.
If Not (files Is Nothing) Then
For Each file In files
Dim item As New ListViewItem(file.Name)
item.SubItems.Add(file.FullName)
ListView1.Items.Add(item)
Next
End If
End Sub
private void PopulateListView()
{
ListView1.Width = 270;
ListView1.Location = new System.Drawing.Point(10, 10);
// Declare and construct the ColumnHeader objects.
ColumnHeader header1, header2;
header1 = new ColumnHeader();
header2 = new ColumnHeader();
// Set the text, alignment and width for each column header.
header1.Text = "File name";
header1.TextAlign = HorizontalAlignment.Left;
header1.Width = 70;
header2.TextAlign = HorizontalAlignment.Left;
header2.Text = "Location";
header2.Width = 200;
// Add the headers to the ListView control.
ListView1.Columns.Add(header1);
ListView1.Columns.Add(header2);
// Populate the ListView.Items property.
// Set the directory to the sample picture directory.
System.IO.DirectoryInfo dirInfo =
new System.IO.DirectoryInfo(
"C:\\Documents and Settings\\All Users" +
"\\Documents\\My Pictures\\Sample Pictures");
// Get the .jpg files from the directory
System.IO.FileInfo[] files = dirInfo.GetFiles("*.jpg");
// Add each file name and full name including path
// to the ListView.
if (files != null)
{
foreach ( System.IO.FileInfo file in files )
{
ListViewItem item = new ListViewItem(file.Name);
item.SubItems.Add(file.FullName);
ListView1.Items.Add(item);
}
}
}
private:
void PopulateListView()
{
ListView1->Width = 270;
ListView1->Location = System::Drawing::Point( 10, 10 );
// Declare and construct the ColumnHeader objects.
ColumnHeader^ header1;
ColumnHeader^ header2;
header1 = gcnew ColumnHeader;
header2 = gcnew ColumnHeader;
// Set the text, alignment and width for each column header.
header1->Text = "File name";
header1->TextAlign = HorizontalAlignment::Left;
header1->Width = 70;
header2->TextAlign = HorizontalAlignment::Left;
header2->Text = "Location";
header2->Width = 200;
// Add the headers to the ListView control.
ListView1->Columns->Add( header1 );
ListView1->Columns->Add( header2 );
// Populate the ListView.Items property.
// Set the directory to the sample picture directory.
System::IO::DirectoryInfo^ dirInfo = gcnew System::IO::DirectoryInfo( "C:\\Documents and Settings\\All Users"
"\\Documents\\My Pictures\\Sample Pictures" );
// Get the .jpg files from the directory
array<System::IO::FileInfo^>^files = dirInfo->GetFiles( "*.jpg" );
// Add each file name and full name including path
// to the ListView.
if ( files != nullptr )
{
System::Collections::IEnumerator^ myEnum = files->GetEnumerator();
while ( myEnum->MoveNext() )
{
System::IO::FileInfo^ file = safe_cast<System::IO::FileInfo^>(myEnum->Current);
ListViewItem^ item = gcnew ListViewItem( file->Name );
item->SubItems->Add( file->FullName );
ListView1->Items->Add( item );
}
}
}
private void PopulateListView()
{
listView1.set_Width(270);
listView1.set_Location(new System.Drawing.Point(10, 10));
// Declare and construct the ColumnHeader objects.
ColumnHeader header1, header2;
header1 = new ColumnHeader();
header2 = new ColumnHeader();
// Set the text, alignment and width for each column header.
header1.set_Text("File name");
header1.set_TextAlign(HorizontalAlignment.Left);
header1.set_Width(70);
header2.set_TextAlign(HorizontalAlignment.Left);
header2.set_Text("Location");
header2.set_Width(200);
// Add the headers to the ListView control.
listView1.get_Columns().Add(header1);
listView1.get_Columns().Add(header2);
// Populate the ListView.Items property.
// Set the directory to the sample picture directory.
System.IO.DirectoryInfo dirInfo =
new System.IO.DirectoryInfo("C:\\Documents and Settings\\All Users"
+ "\\Documents\\My Pictures\\Sample Pictures");
// Get the.jpg files from the directory
System.IO.FileInfo files[] = dirInfo.GetFiles("*.jpg");
// Add each file name and full name including path
// to the ListView.
if (files != null) {
for (int iCtr = 0; iCtr < files.length; iCtr++) {
System.IO.FileInfo file = files[iCtr];
ListViewItem item = new ListViewItem(file.get_Name());
item.get_SubItems().Add(file.get_FullName());
listView1.get_Items().Add(item);
}
}
} //PopulateListView
Vererbungshierarchie
System.Object
System.MarshalByRefObject
System.ComponentModel.Component
System.Windows.Forms.ColumnHeader
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
ColumnHeader-Member
System.Windows.Forms-Namespace
ListView
ListView.ColumnHeaderCollection