Question

enter image description here我想在datagridview中创建n个“全部选择”按钮。 datagirdview有复选框列。如果按全选按钮，则可以选择整个选择。如果再次按下全选按钮，我想释放整个选择。我只能全选，不能取消全选。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;
        }
    }

Answer 1

您可以像这样反转值

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

Answer 2

您可以尝试这样的事情：

private void Btn_selectall_Click(object sender, EventArgs e)
{
    if (dataGridView1.Rows.Cast<DataGridViewRow>().All(r => r.Selected))
    {
        // deselect all
        foreach (DataGridViewRow item in dataGridView1.Rows)
        {
            item.Selected = false;
            item.Cells[0].Value = false;
        }
    }
    else
    {
        // select all
        foreach (DataGridViewRow item in dataGridView1.Rows)
        {
            item.Selected = true;
            item.Cells[0].Value = true;
        }
    }
}

全部选择/取消选择按钮

2 个答案: