//
DataTable table = new DataTable();
table.Columns.Add("序号", Type.GetType("System.String")); //第一列
table.Columns.Add("姓名", Type.GetType("System.String")); //第二列
DataRow row = table.NewRow(); //行
row[0] = "1";
row[1] = "张三";
table.Rows.Add(row);
dataGridView1.DataSource = table;
dataGridView1.Columns[0].Width = 160;
dataGridView1.Columns[1].Width = 340;