HOW TO：取得 Windows Form DataGridView 控制項中選取的儲存格、資料列和資料行

發行項
08/21/2008

更新：2007 年 11 月

您可以自 DataGridView 控制項取得選取的儲存格、資料列或資料行，方法是使用對應的屬性：SelectedCells、SelectedRows 和 SelectedColumns。在下列程序中，您將會取得選取的儲存格，並將資料列和資料行索引顯示於 MessageBox。

若要取得 DataGridView 控制項中選取的儲存格

使用 SelectedCells 屬性。

注意事項：
使用 AreAllCellsSelected 方法以防止顯示可能的大量儲存格。

Private Sub selectedCellsButton_Click( _
    ByVal sender As Object, ByVal e As System.EventArgs) _
    Handles selectedCellsButton.Click

    Dim selectedCellCount As Integer = _
        dataGridView1.GetCellCount(DataGridViewElementStates.Selected)

    If selectedCellCount > 0 Then

        If dataGridView1.AreAllCellsSelected(True) Then

            MessageBox.Show("All cells are selected", "Selected Cells")

        Else

            Dim sb As New System.Text.StringBuilder()

            Dim i As Integer
            For i = 0 To selectedCellCount - 1

                sb.Append("Row: ")
                sb.Append(dataGridView1.SelectedCells(i).RowIndex _
                    .ToString())
                sb.Append(", Column: ")
                sb.Append(dataGridView1.SelectedCells(i).ColumnIndex _
                    .ToString())
                sb.Append(Environment.NewLine)

            Next i

            sb.Append("Total: " + selectedCellCount.ToString())
            MessageBox.Show(sb.ToString(), "Selected Cells")

        End If

    End If

End Sub

private void selectedCellsButton_Click(object sender, System.EventArgs e)
{
    Int32 selectedCellCount =
        dataGridView1.GetCellCount(DataGridViewElementStates.Selected);
    if (selectedCellCount > 0)
    {
        if (dataGridView1.AreAllCellsSelected(true))
        {
            MessageBox.Show("All cells are selected", "Selected Cells");
        }
        else
        {
            System.Text.StringBuilder sb =
                new System.Text.StringBuilder();

            for (int i = 0;
                i < selectedCellCount; i++)
            {
                sb.Append("Row: ");
                sb.Append(dataGridView1.SelectedCells[i].RowIndex
                    .ToString());
                sb.Append(", Column: ");
                sb.Append(dataGridView1.SelectedCells[i].ColumnIndex
                    .ToString());
                sb.Append(Environment.NewLine);
            }

            sb.Append("Total: " + selectedCellCount.ToString());
            MessageBox.Show(sb.ToString(), "Selected Cells");
        }
    }
}

若要取得 DataGridView 控制項中選取的資料列

使用 SelectedRows 屬性。若要允許使用者選取資料列，您必須將 SelectionMode 屬性設定為 FullRowSelect 或 RowHeaderSelect。

Private Sub selectedRowsButton_Click( _
    ByVal sender As Object, ByVal e As System.EventArgs) _
    Handles selectedRowsButton.Click

    Dim selectedRowCount As Integer = _
        dataGridView1.Rows.GetRowCount(DataGridViewElementStates.Selected)

    If selectedRowCount > 0 Then

        Dim sb As New System.Text.StringBuilder()

        Dim i As Integer
        For i = 0 To selectedRowCount - 1

            sb.Append("Row: ")
            sb.Append(dataGridView1.SelectedRows(i).Index.ToString())
            sb.Append(Environment.NewLine)

        Next i

        sb.Append("Total: " + selectedRowCount.ToString())
        MessageBox.Show(sb.ToString(), "Selected Rows")

    End If

End Sub

private void selectedRowsButton_Click(object sender, System.EventArgs e)
{
    Int32 selectedRowCount =
        dataGridView1.Rows.GetRowCount(DataGridViewElementStates.Selected);
    if (selectedRowCount > 0)
    {
        System.Text.StringBuilder sb = new System.Text.StringBuilder();

        for (int i = 0; i < selectedRowCount; i++)
        {
            sb.Append("Row: ");
            sb.Append(dataGridView1.SelectedRows[i].Index.ToString());
            sb.Append(Environment.NewLine);
        }

        sb.Append("Total: " + selectedRowCount.ToString());
        MessageBox.Show(sb.ToString(), "Selected Rows");
    }
}

若要取得 DataGridView 控制項中選取的資料列

使用 SelectedColumns 屬性。若要允許使用者選取資料行，您必須將 SelectionMode 屬性設定為 FullColumnSelect 或 ColumnHeaderSelect。

Private Sub selectedColumnsButton_Click( _
    ByVal sender As Object, ByVal e As System.EventArgs) _
    Handles selectedColumnsButton.Click

    Dim selectedColumnCount As Integer = dataGridView1.Columns _
        .GetColumnCount(DataGridViewElementStates.Selected)

    If selectedColumnCount > 0 Then

        Dim sb As New System.Text.StringBuilder()

        Dim i As Integer
        For i = 0 To selectedColumnCount - 1

            sb.Append("Column: ")
            sb.Append(dataGridView1.SelectedColumns(i).Index.ToString())
            sb.Append(Environment.NewLine)

        Next i

        sb.Append("Total: " + selectedColumnCount.ToString())
        MessageBox.Show(sb.ToString(), "Selected Columns")

    End If

End Sub

private void selectedColumnsButton_Click(object sender, System.EventArgs e)
{
    Int32 selectedColumnCount = dataGridView1.Columns
        .GetColumnCount(DataGridViewElementStates.Selected);
    if (selectedColumnCount > 0)
    {
        System.Text.StringBuilder sb = new System.Text.StringBuilder();

        for (int i = 0; i < selectedColumnCount; i++)
        {
            sb.Append("Column: ");
            sb.Append(dataGridView1.SelectedColumns[i].Index
                .ToString());
            sb.Append(Environment.NewLine);
        }

        sb.Append("Total: " + selectedColumnCount.ToString());
        MessageBox.Show(sb.ToString(), "Selected Columns");
    }
}

編譯程式碼

這個範例需要：

名為 selectedCellsButton、selectedRowsButton 和 selectedColumnsButton 的 Button 控制項，每個控制項都具有附加 Click 事件的處理常式。
名為 dataGridView1 的 DataGridView 控制項。
System、System.Windows.Forms 和 System.Text 組件的參考。