DataGridView.RowHeadersWidth 属性

定义

获取或设置包含行标题的列的宽度(以像素为单位)。Gets or sets the width, in pixels, of the column that contains the row headers.

public:
 property int RowHeadersWidth { int get(); void set(int value); };
public int RowHeadersWidth { get; set; }
member this.RowHeadersWidth : int with get, set
Public Property RowHeadersWidth As Integer

属性值

包含行标题的列的宽度(以像素为单位)。The width, in pixels, of the column that contains row headers. 默认值为 43。The default is 43.

异常

设置此属性时,指定的值小于 4 像素的最小宽度或大于 32768 像素的最大宽度。The specified value when setting this property is less than the minimum width of 4 pixels or is greater than the maximum width of 32768 pixels.

示例

下面的代码示例演示如何在行绘制方案中使用 RowHeadersWidth 属性。The following code example illustrates how to use the RowHeadersWidth property in a row-painting scenario. 在此示例中,此属性的值用于计算在其中绘制自定义背景的边界。In the example, the value of this property is used to calculate the bounds within which a custom background is drawn.

此代码是 @ no__t-0How 中提供的一个更大示例的一部分:自定义 Windows 窗体 DataGridView 控件 @ no__t 中的行的外观。This code is part of a larger example available inHow to: Customize the Appearance of Rows in the Windows Forms DataGridView Control.

// Paints the custom selection background for selected rows.
void dataGridView1_RowPrePaint(object sender,
        DataGridViewRowPrePaintEventArgs e)
{
    // Do not automatically paint the focus rectangle.
    e.PaintParts &= ~DataGridViewPaintParts.Focus;

    // Determine whether the cell should be painted
    // with the custom selection background.
    if ((e.State & DataGridViewElementStates.Selected) ==
                DataGridViewElementStates.Selected)
    {
        // Calculate the bounds of the row.
        Rectangle rowBounds = new Rectangle(
            this.dataGridView1.RowHeadersWidth, e.RowBounds.Top,
            this.dataGridView1.Columns.GetColumnsWidth(
                DataGridViewElementStates.Visible) -
            this.dataGridView1.HorizontalScrollingOffset + 1,
            e.RowBounds.Height);

        // Paint the custom selection background.
        using (Brush backbrush =
            new System.Drawing.Drawing2D.LinearGradientBrush(rowBounds,
                this.dataGridView1.DefaultCellStyle.SelectionBackColor,
                e.InheritedRowStyle.ForeColor,
                System.Drawing.Drawing2D.LinearGradientMode.Horizontal))
        {
            e.Graphics.FillRectangle(backbrush, rowBounds);
        }
    }
}
' Paints the custom selection background for selected rows.
Sub dataGridView1_RowPrePaint(ByVal sender As Object, _
    ByVal e As DataGridViewRowPrePaintEventArgs) _
    Handles dataGridView1.RowPrePaint

    ' Do not automatically paint the focus rectangle.
    e.PaintParts = e.PaintParts And Not DataGridViewPaintParts.Focus

    ' Determine whether the cell should be painted with the 
    ' custom selection background.
    If (e.State And DataGridViewElementStates.Selected) = _
        DataGridViewElementStates.Selected Then

        ' Calculate the bounds of the row.
        Dim rowBounds As New Rectangle( _
            Me.dataGridView1.RowHeadersWidth, e.RowBounds.Top, _
            Me.dataGridView1.Columns.GetColumnsWidth( _
            DataGridViewElementStates.Visible) - _
            Me.dataGridView1.HorizontalScrollingOffset + 1, _
            e.RowBounds.Height)

        ' Paint the custom selection background.
        Dim backbrush As New _
            System.Drawing.Drawing2D.LinearGradientBrush(rowBounds, _
            Me.dataGridView1.DefaultCellStyle.SelectionBackColor, _
            e.InheritedRowStyle.ForeColor, _
            System.Drawing.Drawing2D.LinearGradientMode.Horizontal)
        Try
            e.Graphics.FillRectangle(backbrush, rowBounds)
        Finally
            backbrush.Dispose()
        End Try
    End If

End Sub

注解

@No__t-0 属性可用于将行标题列的大小调整为指定宽度。The RowHeadersWidth property can be used to resize the row header column to a specified width. 若要调整此列的宽度以适应行标题单元格的内容,请使用 AutoResizeRowHeadersWidth 方法。To adjust the width of this column to fit the contents of the row header cells, use the AutoResizeRowHeadersWidth method.

适用于

另请参阅