五、库存查询功能的完善

一、数据库的建立

由于查询功能和之前的入库管理功能所用的数据库都一样，这里仍使用yy_textile表
在fiber_yy数据库下创建yy_textile表在这里插入图片描述

初始数据库信息

二、页面的完善

登录注册页面我就不演示了，前几篇博文也都有介绍

query查询页面
在这里插入图片描述
main_page页面进行功能完善

三、代码实现

query查询页面

using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;namespace fiber_yy
{public partial class query : Form{private DataSet dsall;public string constr = "server=CY-20190824RMES;Initial Catalog=fiber_yy;User ID=sa;pwd=beyond";private SqlDataAdapter mDataAdapter;public query(){InitializeComponent();comboBox1.Items.Add("根据面料名称查询");comboBox1.Items.Add("根据品号查询");}private void button1_Click(object sender, EventArgs e){try{SqlConnection conn = new SqlConnection(constr);conn = new SqlConnection(constr);mDataAdapter = new SqlDataAdapter("SELECT name AS '纺织品名称',number AS '纺织品品号',warp_density AS '经密度' ,weft_density AS '纬密度',warp_linear_density AS '经纱线密度',weft_linear_density AS '纬纱线密度',material AS '原料成分',square_meter_weight AS '平方米重量',width_of_cloth AS '幅宽',horse_length AS '匹长',organization AS '所用组织',stock AS '库存量' FROM yy_textile", conn);dsall = new DataSet();mDataAdapter.Fill(dsall, "hard");dataGridView1.DataSource = dsall.Tables["hard"];}catch {MessageBox.Show("读取失败，请检查是否存在该织物");}}private void button2_Click(object sender, EventArgs e){this.Hide();new main_page().Show();}private void button3_Click(object sender, EventArgs e){try{string model = comboBox1.SelectedItem.ToString();string command = textBox1.Text;byte[] MyData = new byte[0];SqlConnection conn = new SqlConnection(constr);conn.Open();SqlCommand cmd = new SqlCommand();cmd.Connection = conn;//cmd.CommandText = "select * from yy_textile where '" + model + "'='" + command + "'"; //sql语句按指定条件进行if (model == "根据面料名称查询"){cmd.CommandText = "select * from yy_textile where name='" + command + "'";model = "SELECT name AS '纺织品名称',number AS '纺织品品号',warp_density AS '经密度' ,weft_density AS '纬密度',warp_linear_density AS '经纱线密度',weft_linear_density AS '纬纱线密度',material AS '原料成分',square_meter_weight AS '平方米重量',width_of_cloth AS '幅宽',horse_length AS '匹长',organization AS '所用组织',stock AS '库存量' from yy_textile where name='" + command + "'";}if (model == "根据品号查询"){cmd.CommandText = "select * from yy_textile where number='" + command + "'";model = "SELECT name AS '纺织品名称',number AS '纺织品品号',warp_density AS '经密度' ,weft_density AS '纬密度',warp_linear_density AS '经纱线密度',weft_linear_density AS '纬纱线密度',material AS '原料成分',square_meter_weight AS '平方米重量',width_of_cloth AS '幅宽',horse_length AS '匹长',organization AS '所用组织',stock AS '库存量' from yy_textile where number='" + command + "'";}SqlDataReader sdr = cmd.ExecuteReader();sdr.Read();object o = sdr["picture"];MyData = (byte[])sdr["picture"];//读取第一个图片的位流MemoryStream memoryStream = null;memoryStream = new MemoryStream(MyData);pictureBox1.Image = Image.FromStream(memoryStream);//将图片赋给pictureBox1控件MessageBox.Show("读取成功");conn = new SqlConnection(constr);mDataAdapter = new SqlDataAdapter(model, conn);dsall = new DataSet();mDataAdapter.Fill(dsall, "hard");dataGridView1.DataSource = dsall.Tables["hard"];}catch{MessageBox.Show("读取失败，请检查是否存在该织物");}}}
}

main_page页面

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 fiber_yy
{public partial class main_page : Form{public main_page(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){MessageBox.Show("退出成功");this.Close();new Form1().Show();}private void button2_Click(object sender, EventArgs e){this.Close();new warehousing().Show();}private void button3_Click(object sender, EventArgs e){this.Close();new shipment().Show();}private void button4_Click(object sender, EventArgs e){this.Close();new query().Show();}}
}