datagridview 代码添加列

    　　 int column_key = 0;
        private DataGridViewTextBoxColumn column_add(string name)
        {
            DataGridViewTextBoxColumn txtClum = new DataGridViewTextBoxColumn();
            txtClum.DataPropertyName = "txt" + column_key++.ToString();
            txtClum.Name = "txt" + column_key++.ToString() ;
            txtClum.HeaderText = name;
            return txtClum;
        }    

　　　　　　  dgvCostSum.Columns.Add(column_add("日期"));
            dgvCostSum.Columns.Add(column_add("姓名/单位"));
            dgvCostSum.Columns.Add(column_add("流水号"));
            dgvCostSum.Columns.Add(column_add("体检金额"));
            dgvCostSum.Columns.Add(column_add("收费员"));
            dgvCostSum.Columns.Add(column_add("支付方式"));