DataGridViewColumnHeaderCell.SortGlyphDirection 属性

定义

获取或设置一个值,该值指示是否显示排序标志符号。Gets or sets a value indicating which sort glyph is displayed.

public:
 property System::Windows::Forms::SortOrder SortGlyphDirection { System::Windows::Forms::SortOrder get(); void set(System::Windows::Forms::SortOrder value); };
public System.Windows.Forms.SortOrder SortGlyphDirection { get; set; }
member this.SortGlyphDirection : System.Windows.Forms.SortOrder with get, set
Public Property SortGlyphDirection As SortOrder

属性值

SortOrder

表示当前标志符号的 SortOrder 值。A SortOrder value representing the current glyph. 默认值为 NoneThe default is None.

例外

当设置此属性时,指定的值不是有效的 SortOrder 值。The specified value when setting this property is not a valid SortOrder value.

当设置此属性时,单元格的 OwningColumn 属性或 DataGridView 属性的值是 nullWhen setting this property, the value of either the OwningColumn property or the DataGridView property of the cell is null.

- 或 --or- 当更改此属性值时,指定的值不是 None,所属列的 SortMode 属性值是 NotSortableWhen changing the value of this property, the specified value is not None and the value of the SortMode property of the owning column is NotSortable.

示例

下面的代码演示如何 SortGlyphDirection 在编程排序中使用属性。The following code demonstrates how to use the SortGlyphDirection property in a programmatic sort.

private void sortButton_Click(object sender, System.EventArgs e)
{
    // Check which column is selected, otherwise set NewColumn to null.
    DataGridViewColumn newColumn =
        dataGridView1.Columns.GetColumnCount(
        DataGridViewElementStates.Selected) == 1 ?
        dataGridView1.SelectedColumns[0] : null;

    DataGridViewColumn oldColumn = dataGridView1.SortedColumn;
    ListSortDirection direction;

    // If oldColumn is null, then the DataGridView is not currently sorted.
    if (oldColumn != null)
    {
        // Sort the same column again, reversing the SortOrder.
        if (oldColumn == newColumn &&
            dataGridView1.SortOrder == SortOrder.Ascending)
        {
            direction = ListSortDirection.Descending;
        }
        else
        {
            // Sort a new column and remove the old SortGlyph.
            direction = ListSortDirection.Ascending;
            oldColumn.HeaderCell.SortGlyphDirection = SortOrder.None;
        }
    }
    else
    {
        direction = ListSortDirection.Ascending;
    }

    // If no column has been selected, display an error dialog  box.
    if (newColumn == null)
    {
        MessageBox.Show("Select a single column and try again.",
            "Error: Invalid Selection", MessageBoxButtons.OK,
            MessageBoxIcon.Error);
    }
    else
    {
        dataGridView1.Sort(newColumn, direction);
        newColumn.HeaderCell.SortGlyphDirection =
            direction == ListSortDirection.Ascending ?
            SortOrder.Ascending : SortOrder.Descending;
    }
}
Private Sub SortButton_Click(ByVal sender As Object, _
    ByVal e As EventArgs) Handles sortButton.Click

    ' Check which column is selected, otherwise set NewColumn to Nothing.
    Dim newColumn As DataGridViewColumn
    If dataGridView1.Columns.GetColumnCount(DataGridViewElementStates _
        .Selected) = 1 Then
        newColumn = dataGridView1.SelectedColumns(0)
    Else
        newColumn = Nothing
    End If

    Dim oldColumn As DataGridViewColumn = dataGridView1.SortedColumn
    Dim direction As ListSortDirection

    ' If oldColumn is null, then the DataGridView is not currently sorted.
    If oldColumn IsNot Nothing Then

        ' Sort the same column again, reversing the SortOrder.
        If oldColumn Is newColumn AndAlso dataGridView1.SortOrder = _
            SortOrder.Ascending Then
            direction = ListSortDirection.Descending
        Else

            ' Sort a new column and remove the old SortGlyph.
            direction = ListSortDirection.Ascending
            oldColumn.HeaderCell.SortGlyphDirection = SortOrder.None
        End If
    Else
        direction = ListSortDirection.Ascending
    End If


    ' If no column has been selected, display an error dialog  box.
    If newColumn Is Nothing Then
        MessageBox.Show("Select a single column and try again.", _
            "Error: Invalid Selection", MessageBoxButtons.OK, _
            MessageBoxIcon.Error)
    Else
        dataGridView1.Sort(newColumn, direction)
        If direction = ListSortDirection.Ascending Then
            newColumn.HeaderCell.SortGlyphDirection = SortOrder.Ascending
        Else
            newColumn.HeaderCell.SortGlyphDirection = SortOrder.Descending
        End If
    End If

End Sub

注解

对于属性设置为的列,将自动设置此属性 SortMode DataGridViewColumnSortMode.AutomaticThis property is set automatically for columns with the SortMode property set to DataGridViewColumnSortMode.Automatic. 如果按属性设置为的列进行排序,则必须自行设置此属性 SortMode DataGridViewColumnSortMode.ProgrammaticYou must set this property yourself when sorting by columns with the SortMode property set to DataGridViewColumnSortMode.Programmatic.

适用于

另请参阅