C# 如何datagrateveiw 一列的值和TextBox的值作对比

Question

如题，都datagrateveiw1，和TextBox1，如何取出datagrateveiw1第二列的所有值和TextBox1.text作对比？

Answer 1

foreach (DataGridViewRow r in this.dataGridView1.Rows)
            {
                if (r.Cells[1].Value != null)
                {
                    if (r.Cells[1].Value.ToString() == TextBox1.Text)
                    {
                        ......
                    }
                }
            }

Answer 2

for(int i=0;i<datagridview1.Rows.Count;i++)
{
    if(datagridview1.Rows[i][1].ToString()==textbox1.Text)
    {}
}

Answer 3

foreach (DataRow dt in myDataView.Table.Rows)
            {
                if (dt[0].ToString() == name) return true;
            }