DataGridView.SortedColumn 屬性
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
取得 DataGridView 內容目前排序所依據的資料行。
public:
property System::Windows::Forms::DataGridViewColumn ^ SortedColumn { System::Windows::Forms::DataGridViewColumn ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.DataGridViewColumn SortedColumn { get; }
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.DataGridViewColumn? SortedColumn { get; }
[<System.ComponentModel.Browsable(false)>]
member this.SortedColumn : System.Windows.Forms.DataGridViewColumn
Public ReadOnly Property SortedColumn As DataGridViewColumn
屬性值
DataGridView 內容目前排序所依據的 DataGridViewColumn。
- 屬性
範例
下列程式碼範例示範如何在程式設計排序中使用 SortedColumn 屬性。
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
備註
DataGridView如果未排序 ,這個屬性會傳回 null
。
當這個屬性所指示的資料行具有 SortMode 的屬性值 DataGridViewColumnSortMode.Automatic 時,它會根據 屬性的值 SortOrder 來顯示排序字元。
當資料行的屬性值 DataGridViewColumnSortMode.Programmatic 為 SortMode 時,您必須透過 DataGridViewColumnHeaderCell.SortGlyphDirection 屬性自行顯示排序字元。
注意
當您使用自訂排序排序排序控制項時,此屬性的值並不有意義。 如需自訂排序的詳細資訊,請參閱 Sort(IComparer) 方法和 SortCompare 事件。