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ListBox.MultiColumn Property

  • Reference

Definition

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll

Gets or sets a value indicating whether the ListBox supports multiple columns.

public:
 property bool MultiColumn { bool get(); void set(bool value); };
public bool MultiColumn { get; set; }
member this.MultiColumn : bool with get, set
Public Property MultiColumn As Boolean

Property Value

Boolean

true if the ListBox supports multiple columns; otherwise, false. The default is false.

Exceptions

ArgumentException

A multicolumn ListBox cannot have a variable-sized height.

Examples

The following code example demonstrates a simple two-column ListBox.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

public class Form1 : Form
{
    private ListBox listBox1;

    public Form1()
    {
        InitializeComponent();
    }
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new Form1());
    }

    private void InitializeComponent()
    {
        this.listBox1 = new System.Windows.Forms.ListBox();
        this.SuspendLayout();
        // 
        // listBox1
        // 
        this.listBox1.FormattingEnabled = true;
        this.listBox1.HorizontalScrollbar = true;
        this.listBox1.Items.AddRange(new object[] {
            "Item 1, column 1",
            "Item 2, column 1",
            "Item 3, column 1",
            "Item 4, column 1",
            "Item 5, column 1",
            "Item 1, column 2",
            "Item 2, column 2",
            "Item 3, column 2"});
        this.listBox1.Location = new System.Drawing.Point(0, 0);
        this.listBox1.MultiColumn = true;
        this.listBox1.Name = "listBox1";
        this.listBox1.ScrollAlwaysVisible = true;
        this.listBox1.Size = new System.Drawing.Size(120, 95);
        this.listBox1.TabIndex = 0;
        this.listBox1.ColumnWidth = 85;
        // 
        // Form1
        // 
        this.ClientSize = new System.Drawing.Size(292, 273);
        this.Controls.Add(this.listBox1);
        this.Name = "Form1";
        this.ResumeLayout(false);
    }
}

Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Text
Imports System.Windows.Forms

Public Class Form1
   Inherits Form
   Private listBox1 As ListBox
   
   
   Public Sub New()
      InitializeComponent()
   End Sub
   
   <STAThread()>  _
   Shared Sub Main()
      Application.EnableVisualStyles()
      Application.SetCompatibleTextRenderingDefault(False)
      Application.Run(New Form1())
   End Sub
   
   Private Sub InitializeComponent()
      Me.listBox1 = New System.Windows.Forms.ListBox()
      Me.SuspendLayout()
      ' 
      ' listBox1
      ' 
      Me.listBox1.FormattingEnabled = True
      Me.listBox1.HorizontalScrollbar = True
      Me.listBox1.Items.AddRange(New Object() {"Item 1, column 1", "Item 2, column 1", "Item 3, column 1", "Item 4, column 1", "Item 5, column 1", "Item 1, column 2", "Item 2, column 2", "Item 3, column 2"})
      Me.listBox1.Location = New System.Drawing.Point(0, 0)
      Me.listBox1.MultiColumn = True
      Me.listBox1.Name = "listBox1"
      Me.listBox1.ScrollAlwaysVisible = True
      Me.listBox1.Size = New System.Drawing.Size(120, 95)
      Me.listBox1.TabIndex = 0
      Me.listBox1.ColumnWidth = 85
      ' 
      ' Form1
      ' 
      Me.ClientSize = New System.Drawing.Size(292, 273)
      Me.Controls.Add(listBox1)
      Me.Name = "Form1"
      Me.ResumeLayout(False)
   End Sub
End Class

Remarks

A multicolumn ListBox places items into as many columns as are needed to make vertical scrolling unnecessary. The user can use the keyboard to navigate to columns that are not currently visible. Set the HorizontalScrollbar property to true to display a horizontal scroll bar that enables the user to scroll to columns that are not currently shown in the visible region of the ListBox. The value of the ColumnWidth property determines the width of each column.

Applies to

See also