Question

我DataTable table DataGridView dataGridView1有几个文本和整数列。它们添加了：

DataTable table = new DataTable();

table.Columns.Add("Guest name", typeof(string));
table.Columns.Add("Guest_id", typeof(int));
table.Columns.Add("Room_id", typeof(int));
table.Columns.Add("Room", typeof(string));
table.Columns.Add("Reservation_id", typeof(int));
table.Columns.Add("Reservation date", typeof(DateTime));
table.Columns.Add("Start date", typeof(DateTime));
table.Columns.Add("End date", typeof(DateTime));

dataGridView1.DataSource = table;

然后将dataGridView1的按钮添加到特定列：

DataGridViewButtonColumn editGuest = new DataGridViewButtonColumn();
DataGridViewButtonColumn editRoom = new DataGridViewButtonColumn();
DataGridViewButtonColumn editReservation = new DataGridViewButtonColumn();
DataGridViewButtonColumn deleteReservation = new DataGridViewButtonColumn();

editGuest.Name = "Edit guest";
editGuest.Text = "Edit";
editGuest.UseColumnTextForButtonValue = true;
editRoom.Name = "Edit room";
editRoom.Text = "Edit";
editRoom.UseColumnTextForButtonValue = true;
editReservation.Name = "Edit reservation";
editReservation.Text = "Edit";
editReservation.UseColumnTextForButtonValue = true;
deleteReservation.Name = "Delete reservation";
deleteReservation.Text = "Delete";
deleteReservation.UseColumnTextForButtonValue = true;

dataGridView1.Columns.Insert(2, editGuest);
dataGridView1.Columns.Insert(5, editRoom);
dataGridView1.Columns.Insert(10, editReservation);
dataGridView1.Columns.Insert(11, deleteReservation);

所有数据都从数据库插入table，看起来不错。现在我尝试点击（任意）按钮并从（任何）单元格中获取文本。 Tryed：

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
    var senderGrid = (DataGridView)sender;

    if (senderGrid.Columns[e.ColumnIndex] is DataGridViewButtonColumn && e.RowIndex >= 0)
    {
        if (e.ColumnIndex == 0)
        {
            string text = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
            MessageBox.Show(text);
        }
    }
}

始终获得＆＃34;编辑＆＃34;或＆＃34;删除＆＃34;消息无论Cell []中有哪个号码。似乎dataGridView1只有里面的按钮，而不是表格。如何从table单元格而不是dataGridView获取价值？

Answer 1

我的快速测试显示单元格中有值，可能需要选择不同的索引。

仅获取数据项（不包括未绑定列），请尝试使用DataGridViewRow的DataBoundItem属性。当使用绑定到DataTable时，实际类型将是DataRowView。

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
    var senderGrid = (DataGridView)sender;

    if (e.RowIndex >= 0 && senderGrid.Columns[e.ColumnIndex] is DataGridViewButtonColumn)
    {
        var cellValues = Enumerable.Range(0, senderGrid.Columns.Count)
                                   .Select(i => senderGrid[i, e.RowIndex].Value);
        string text = String.Join("; ", cellValues);
        MessageBox.Show(text);

        var rw = senderGrid.Rows[e.RowIndex].DataBoundItem as DataRowView;
        text = String.Join("; ", rw.Row.ItemArray);
        MessageBox.Show(text);
    }
}

当dataGridView.Columns.Insert在代码中时，从dataGridView获取单元格值

1 个答案: