リストボックスの項目をデータベースに保存する簡単な方法はありますか? ユーザーがコンボボックスからアイテムを選択してリストボックスに追加するWindowsフォームにアクセスデータベースを使用しています。
リストボックス内のすべてのアイテムをコンマで区切ってデータベースに追加したいと思います。どうすればこれを実行できますか?
これがクラスのコードです
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);
}
}
}