c# - 全部选择/取消选择按钮(All select /deselect button)

Question

enter image description here I want to make n 'all select' button in datagridview.

(在此处输入图像描述，我想在datagridview中使n个“全部选择”按钮。)

datagirdview has checkbox column.

(datagirdview有复选框列。)

If I press the Select All button, I can select the entire selection.

(如果按全选按钮，则可以选择整个选择。)

If I press the Select All button again, I want to release the entire selection.

(如果再次按下全选按钮，我想释放整个选择。)

I can only Select All, no DeSelct All Please help me :(

(我只能选择全部，而不能全部删除请帮助我:()

private void Btn_selectall_Click(object sender, EventArgs e)
    {           

        foreach (DataGridViewRow item in dataGridView1.Rows)
        {
            item.Selected = true;
            item.Cells[0].Value = true;
        }
    }

  ask by ??? translate from so

Answer 1

You can invert the values like so

(您可以像这样反转值)

item.Selected = !item.Selected;
item.Cells[0].Value = !item.Cells[0].Value;