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在此处输入图像描述有什么简单的方法可以将列表框中的项目保存到数据库中。我正在使用 Windows 窗体的访问数据库,用户从组合框中选择项目并将其添加到列表框中。

现在我想将列表框中的所有项目添加到用逗号分隔的数据库中。我该怎么做?

这是该课程的代码

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;
using System.Data.OleDb;

namespace Purchase_Management
{
    public partial class Form1 : Form
    {

        string connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Users\\Amrit\\Desktop\\Database.accdb ;Persist Security Info=False;";
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            comboBox1.SelectedText = "Mr";
            comboBox1.Items.Add("Mr");
            comboBox1.Items.Add("Mrs");
            comboBox1.Items.Add("Miss");
            DataSet ds = GetAllItems();
            comboBox2.DataSource = ds.Tables[0];
            comboBox2.DisplayMember = "Product Name";


        }

        public DataSet GetAllItems()
        {
            DataSet dataSet = new DataSet();
            // Create connection object
            OleDbConnection oleConn = new OleDbConnection(connString);
            try
            {
                oleConn.Open();
                string sql = "SELECT [Product Name] FROM [Product]";
                OleDbDataAdapter dataAdapter = new OleDbDataAdapter(sql, oleConn);
                dataAdapter.Fill(dataSet, "Product");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            finally
            {
                oleConn.Close();
            }
            if (dataSet.Tables.Count <= 0)
                return null;
            else
                return dataSet;
        }


        public string InsertUser(string custName, string title, string cust, string phoneNumber, string address1, string address2, string city, string postCode, string country, string itemPurchased)
        {

            // Create connection object
            int ix = 0;
            string rTurn = "";
            OleDbConnection oleConn = new OleDbConnection(connString);
            try
            {
                oleConn.Open();
                string sql = "INSERT INTO [Customer]([Customer's Ebayname], [Title],  [Customer's Name], [Phone Number], [Address 1], [Address 2], [City], [Post Code], [Country] , [Item Purchased])" +
                         "VALUES ( @custName, @title, @cust, @phoneNumber, @address1, @address2, @city, @postCode, @country , @itemPurchased)";
                OleDbCommand oleComm = new OleDbCommand(sql, oleConn);

                oleComm.Parameters.Add("@custName", OleDbType.Char).Value = custName;
                oleComm.Parameters.Add("@title", OleDbType.Char).Value = title;
                oleComm.Parameters.Add("@cust", OleDbType.Char).Value = cust;
                oleComm.Parameters.Add("@phoneNumber", OleDbType.Char).Value = phoneNumber;
                oleComm.Parameters.Add("@address1", OleDbType.Char).Value = address1;
                oleComm.Parameters.Add("@address2", OleDbType.Char).Value = address2;
                oleComm.Parameters.Add("@city", OleDbType.Char).Value = city;
                oleComm.Parameters.Add("@postCode", OleDbType.Char).Value = postCode;
                oleComm.Parameters.Add("@country", OleDbType.Char).Value = country;
                oleComm.Parameters.Add("@itemPurchased", OleDbType.Char).Value = itemPurchased;


                ix = oleComm.ExecuteNonQuery();
                if (ix > 0)
                    rTurn = "User Added";
                else
                    rTurn = "Insert Failed";
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                rTurn = ex.ToString();
            }
            finally
            {
                oleConn.Close();
            }
            return rTurn;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            InsertUser(textBox1.Text, comboBox1.Text, textBox2.Text, textBox3.Text, textBox4.Text, textBox5.Text, textBox6.Text, textBox7.Text, textBox8.Text, comboBox2.Text);
            if (MessageBox.Show("Customer Details Saved Successfuly") == DialogResult.OK)
            {
                Form1.ActiveForm.Close();


            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            listBox1.Items.Add(comboBox2.Text);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (this.listBox1.SelectedIndex >= 0)
                this.listBox1.Items.RemoveAt(this.listBox1.SelectedIndex);
        }



    }
}
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1 回答 1

2

步骤1

连接 ListBox 中的所有项目。 String.Join接受一个字符串值数组,并返回一个将它们连接在一起的字符串。考虑使用包含您添加的所有项目的ListBox.Items 属性。

第2步

将字符串插入您想要的任何数据库中。如果您在 Product 表中重用“itemPurchased”列,您将能够使用您从上面的步骤 1 中连接的字符串。

由于没有为您编写完整的代码,我不确定我们还能为您做些什么。

于 2013-02-15T10:41:24.263 回答