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DataGridViewRowHeadersWidthSizeMode Enumeration

Defines values for specifying how the row header width is adjusted.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

'Declaration
Public Enumeration DataGridViewRowHeadersWidthSizeMode

Member nameDescription
AutoSizeToAllHeadersThe row header width adjusts to fit the contents of all the row header cells.
AutoSizeToDisplayedHeadersThe row header width adjusts to fit the contents of all the row headers in the currently displayed rows.
AutoSizeToFirstHeaderThe row header width adjusts to fit the contents of the first row header.
DisableResizingUsers cannot adjust the column header width with the mouse.
EnableResizingUsers can adjust the column header width with the mouse.

By default, users can resize the width of the row headers. You can disable this ability to set a fixed width, or you can use a content-based automatic sizing mode, which also disables user resizing.

The DataGridView control can adjust the width of its row headers to fit all their contents, only the contents of the first header, or only the contents of currently displayed headers. Calculating the new width using a subset of headers is useful to avoid a performance penalty when working with many rows of data.

This enumeration is used by the DataGridView control RowHeadersWidthSizeMode property and AutoResizeRowHeadersWidth method.

For more information about sizing modes, see Sizing Options in the Windows Forms DataGridView Control.

The following code example illustrates the use of this enumeration in a display-only, non-interactive DataGridView control.

' Configures the appearance and behavior of a DataGridView control. 
Private Sub InitializeDataGridView()

    ' Initialize basic DataGridView properties.
    dataGridView1.Dock = DockStyle.Fill
    dataGridView1.BackgroundColor = Color.LightGray
    dataGridView1.BorderStyle = BorderStyle.Fixed3D

    ' Set property values appropriate for read-only display and  
    ' limited interactivity. 
    dataGridView1.AllowUserToAddRows = False
    dataGridView1.AllowUserToDeleteRows = False
    dataGridView1.AllowUserToOrderColumns = True
    dataGridView1.ReadOnly = True
    dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect
    dataGridView1.MultiSelect = False
    dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None
    dataGridView1.AllowUserToResizeColumns = False
    dataGridView1.ColumnHeadersHeightSizeMode = _
        DataGridViewColumnHeadersHeightSizeMode.DisableResizing
    dataGridView1.AllowUserToResizeRows = False
    dataGridView1.RowHeadersWidthSizeMode = _
        DataGridViewRowHeadersWidthSizeMode.DisableResizing

    ' Set the selection background color for all the cells.
    dataGridView1.DefaultCellStyle.SelectionBackColor = Color.White
    dataGridView1.DefaultCellStyle.SelectionForeColor = Color.Black

    ' Set RowHeadersDefaultCellStyle.SelectionBackColor so that its default 
    ' value won't override DataGridView.DefaultCellStyle.SelectionBackColor.
    dataGridView1.RowHeadersDefaultCellStyle.SelectionBackColor = Color.Empty

    ' Set the background color for all rows and for alternating rows.  
    ' The value for alternating rows overrides the value for all rows. 
    dataGridView1.RowsDefaultCellStyle.BackColor = Color.LightGray
    dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.DarkGray

    ' Set the row and column header styles.
    dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor = Color.White
    dataGridView1.ColumnHeadersDefaultCellStyle.BackColor = Color.Black
    dataGridView1.RowHeadersDefaultCellStyle.BackColor = Color.Black

    ' Set the Format property on the "Last Prepared" column to cause 
    ' the DateTime to be formatted as "Month, Year".
    dataGridView1.Columns("Last Prepared").DefaultCellStyle.Format = "y" 

    ' Specify a larger font for the "Ratings" column.  
    Dim font As New Font( _
        dataGridView1.DefaultCellStyle.Font.FontFamily, 25, FontStyle.Bold)
    Try
        dataGridView1.Columns("Rating").DefaultCellStyle.Font = font
    Finally
        font.Dispose()
    End Try 

End Sub

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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