C#

using System.Windows.Forms;

public partial class Form1 : Form
{
    ListBox listBox1;
    public Form1()
    {
        InitializeComponent();
        listBox1 = new ListBox();
        Controls.Add(listBox1);
        FillList();
        MyClass secondItem = (MyClass)listBox1.Items[1];
        MessageBox.Show(secondItem.MyStringProperty);
    }
    void FillList()
    {
        listBox1.Items.AddRange(new object[]{
                new MyClass("A"),
                new MyClass("B"),
                new MyClass("C"),
            });
    }
}
public class MyClass
{
    public MyClass(string myStringProperty)
    {
        MyStringProperty = myStringProperty;
    }
    public string MyStringProperty
    {
        get;
        set;
    }
    public override string ToString()
    {
        return MyStringProperty;
    }
}

System.Row.DataRowView item = (System.Row.DataRowView)Listbox.items[i];

hdv212 wrote:

i don't want to TransactionScope clas, because it has a low speed.

namespace TransactionScopeInsertSample.TestDataSetTableAdapters
{
    public partial class t5TableAdapter : System.ComponentModel.Component
    {
        public SqlConnection OpenConnection()
        {
            if (this._connection == null) this.InitConnection();
            if (this._connection.State != System.Data.ConnectionState.Open)
                this._connection.Open();
            return this._connection;
        }

        public void CloseConnection()
        {
            this._connection.Close();
        }        
    }
}

// Using TransactionScope class with TableAdapter (Extending TableAdapter class)
using (TransactionScope ts = new TransactionScope())
{
	try
	{
		TestDataSetTableAdapters.t5TableAdapter adapterT5 = new TransactionScopeInsertSample.TestDataSetTableAdapters.t5TableAdapter();
		TestDataSetTableAdapters.t6TableAdapter adapterT6 = new TransactionScopeInsertSample.TestDataSetTableAdapters.t6TableAdapter();

		adapterT6.Connection = adapterT5.Connection;
		adapterT5.OpenConnection();

		adapterT5.Insert(int.Parse(this.textBox1.Text));
		adapterT6.Insert(int.Parse(this.textBox2.Text));

		adapterT5.CloseConnection();

		ts.Complete();
		MessageBox.Show("Values inserted!");
	}
	catch (Exception ex)
	{
		MessageBox.Show(ex.Message);
	}
}