Export (0) Print
Expand All
1 out of 2 rated this helpful - Rate this topic

ListView.Columns Property

Gets the collection of all column headers that appear in the control.

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

'Declaration
<LocalizableAttribute(True)> _
Public ReadOnly Property Columns As ColumnHeaderCollection
'Usage
Dim instance As ListView
Dim value As ColumnHeaderCollection

value = instance.Columns

/** @property */
public ColumnHeaderCollection get_Columns ()

public function get Columns () : ColumnHeaderCollection

Not applicable.

Property Value

A ListView.ColumnHeaderCollection that represents the column headers that appear when the View property is set to Details.

The Columns property returns a collection containing the ColumnHeader objects that are displayed in the ListView control. ColumnHeader objects define the columns that are displayed in the ListView control when the View property is set to Details. Each column is used to display subitem information for each item in the ListView. For more information on how to manipulate the items in the collection, see ListView.ColumnHeaderCollection.

NoteNote:

If your ListView control does not have any column headers specified and you set the View property to Details, the ListView control will not display any items.

The following code example creates a ListView control with three ListViewItem objects specified and three ListViewItem.ListViewSubItem objects specified for each item. The example also creates ColumnHeader objects to display the subitems in details view. Two ImageList objects are also created in the code example to provide images for the ListViewItem objects. These ImageList objects are added to the LargeImageList and SmallImageList properties. The example uses the following properties in creating the ListView control.

This example requires that you have added the code to a Form and call the method created in the example from the constructor or another method on the form. The example also requires that images named MySmallImage1, MySmallImage2, MyLargeImage1, and MyLargeImage2 are located in the root directory of drive C.

Private Sub CreateMyListView()
    ' Create a new ListView control.
    Dim listView1 As New ListView()
    listView1.Bounds = New Rectangle(New Point(10, 10), New Size(300, 200))

    ' Set the view to show details.
    listView1.View = View.Details
    ' Allow the user to edit item text.
    listView1.LabelEdit = True
    ' Allow the user to rearrange columns.
    listView1.AllowColumnReorder = True
    ' Display check boxes.
    listView1.CheckBoxes = True
    ' Select the item and subitems when selection is made.
    listView1.FullRowSelect = True
    ' Display grid lines.
    listView1.GridLines = True
    ' Sort the items in the list in ascending order.
    listView1.Sorting = SortOrder.Ascending

    ' Create three items and three sets of subitems for each item.
    Dim item1 As New ListViewItem("item1", 0)
    ' Place a check mark next to the item.
    item1.Checked = True
    item1.SubItems.Add("1")
    item1.SubItems.Add("2")
    item1.SubItems.Add("3")
    Dim item2 As New ListViewItem("item2", 1)
    item2.SubItems.Add("4")
    item2.SubItems.Add("5")
    item2.SubItems.Add("6")
    Dim item3 As New ListViewItem("item3", 0)
    ' Place a check mark next to the item.
    item3.Checked = True
    item3.SubItems.Add("7")
    item3.SubItems.Add("8")
    item3.SubItems.Add("9")

    ' Create columns for the items and subitems.
    listView1.Columns.Add("Item Column", -2, HorizontalAlignment.Left)
    listView1.Columns.Add("Column 2", -2, HorizontalAlignment.Left)
    listView1.Columns.Add("Column 3", -2, HorizontalAlignment.Left)
    listView1.Columns.Add("Column 4", -2, HorizontalAlignment.Center)

    'Add the items to the ListView.
    listView1.Items.AddRange(New ListViewItem() {item1, item2, item3})

    ' Create two ImageList objects.
    Dim imageListSmall As New ImageList()
    Dim imageListLarge As New ImageList()

    ' Initialize the ImageList objects with bitmaps.
    imageListSmall.Images.Add(Bitmap.FromFile("C:\MySmallImage1.bmp"))
    imageListSmall.Images.Add(Bitmap.FromFile("C:\MySmallImage2.bmp"))
    imageListLarge.Images.Add(Bitmap.FromFile("C:\MyLargeImage1.bmp"))
    imageListLarge.Images.Add(Bitmap.FromFile("C:\MyLargeImage2.bmp"))

    'Assign the ImageList objects to the ListView.
    listView1.LargeImageList = imageListLarge
    listView1.SmallImageList = imageListSmall

    ' Add the ListView to the control collection.
    Me.Controls.Add(listView1)
End Sub 'CreateMyListView


private void CreateMyListView()
{
    // Create a new ListView control.
    ListView listView1 = new ListView();
    listView1.set_Bounds(new Rectangle(new Point(10, 10), 
        new Size(300, 200)));

    // Set the view to show details.
    listView1.set_View(View.Details);

    // Allow the user to edit item text.
    listView1.set_LabelEdit(true);

    // Allow the user to rearrange columns.
    listView1.set_AllowColumnReorder(true);

    // Display check boxes.
    listView1.set_CheckBoxes(true);

    // Select the item and subitems when selection is made.
    listView1.set_FullRowSelect(true);

    // Display grid lines.
    listView1.set_GridLines(true);

    // Sort the items in the list in ascending order.
    listView1.set_Sorting(SortOrder.Ascending);

    // Create three items and three sets of subitems for each item.
    ListViewItem item1 = new ListViewItem("item1", 0);

    // Place a check mark next to the item.
    item1.set_Checked(true);

    item1.get_SubItems().Add("1");
    item1.get_SubItems().Add("2");
    item1.get_SubItems().Add("3");

    ListViewItem item2 = new ListViewItem("item2", 1);
    item2.get_SubItems().Add("4");
    item2.get_SubItems().Add("5");
    item2.get_SubItems().Add("6");

    ListViewItem item3 = new ListViewItem("item3", 0);

    // Place a check mark next to the item.
    item3.set_Checked(true);

    item3.get_SubItems().Add("7");
    item3.get_SubItems().Add("8");
    item3.get_SubItems().Add("9");

    // Create columns for the items and subitems.
    listView1.get_Columns().Add("Item Column", -2, 
        HorizontalAlignment.Left);
    listView1.get_Columns().Add("Column 2", -2, HorizontalAlignment.Left);
    listView1.get_Columns().Add("Column 3", -2, HorizontalAlignment.Left);
    listView1.get_Columns().Add("Column 4", -2, HorizontalAlignment.Center);

    //Add the items to the ListView.
    listView1.get_Items().AddRange(new ListViewItem[] { item1, item2, 
        item3 });

    // Create two ImageList objects.
    ImageList imageListSmall = new ImageList();
    ImageList imageListLarge = new ImageList();

    // Initialize the ImageList objects with bitmaps.
    imageListSmall.get_Images().Add(Bitmap.FromFile(
        "C:\\MySmallImage1.bmp"));
    imageListSmall.get_Images().Add(Bitmap.FromFile(
        "C:\\MySmallImage2.bmp"));
    imageListLarge.get_Images().Add(Bitmap.FromFile(
        "C:\\MyLargeImage1.bmp"));
    imageListLarge.get_Images().Add(Bitmap.FromFile(
        "C:\\MyLargeImage2.bmp"));

    //Assign the ImageList objects to the ListView.
    listView1.set_LargeImageList(imageListLarge);
    listView1.set_SmallImageList(imageListSmall);

    // Add the ListView to the control collection.
    this.get_Controls().Add(listView1);
} //CreateMyListView

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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft. All rights reserved.