cccc整合版/窗体界面/shangpingliulan/商品退货界面.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace shangpingliulan
{
    public partial class 商品退货界面 : Form
    {
        public 商品退货界面()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            BindGrid();
        }
        //绑定销售明细列表
        private void BindGrid()
        {
            string ReceiptsCode = this.textBox1.Text;
            if (ReceiptsCode == "")
            {
                MessageBox.Show("请输入购物小票流水号!");
                return;
            }
            //多表联合查询(Sales,SalesDetail,Goods,Salesman)
            string sqlStr = "select * from Sales,SalesDetail,Goods,Salesman where Sales.SalesID=SalesDetail.SalesID and SalesDetail.GoodsID=Goods.GoodsID and Sales.SalesmanID=Salesman.SalesmanID and Sales.ReceiptsCode='" + ReceiptsCode + "'";
            this.dataGridView1.AutoGenerateColumns = false;
            DataTable dt = DBHelper.GetDataTable(sqlStr);
            this.dataGridView1.DataSource = dt;
            //显示交易金额
            if (dt.Rows.Count > 0)
                this.label4.Text = dt.Rows[0]["Amount"].ToString();
        }
        private void dataGridView1_SelectionChanged(object sender, EventArgs e)
        {
            float returnMoney = 0;
            foreach (DataGridViewRow row in this.dataGridView1.SelectedRows)
            {
                returnMoney += Convert.ToSingle(row.Cells[2].Value) * Convert.ToInt32(row.Cells[3].Value);
            }

            this.label5.Text = returnMoney.ToString("f2");
        }
       

        private void button2_Click(object sender, EventArgs e)
        {
            //退货金额
            float returnMoney = float.Parse(this.label5.Text);
            //订单交易金额
            float totalMoney = float.Parse(this.label4.Text);
            if (returnMoney == 0)