/// <summary> /// 下拉列表选择事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void com_find_type_SelectionChangeCommitted(object sender, EventArgs e) { com_find_type2.DataSource = null; switch (com_find_type.Text) //根据用户的选择变更第二个下拉框的内容 { case "根据仓库号查找": lab_find_type2.Text = "请选择仓库"; com_find_type2.DisplayMember = "Warehouse_name"; com_find_type2.ValueMember = "Id"; find_type = " w.id="; com_find_type2.DataSource = wnb.FindAll(); break; case "根据客户名查找": lab_find_type2.Text = "请选择客户"; com_find_type2.DisplayMember = "Client_name"; com_find_type2.ValueMember = "Id"; find_type = " c.id="; com_find_type2.DataSource = cb.FindAll(); break; case "根据物品名查找": lab_find_type2.Text = "请选择物品"; com_find_type2.DisplayMember = "Goods_name"; com_find_type2.ValueMember = "Id"; find_type = " g.id="; com_find_type2.DataSource = gb.FindAll(); break; } }