C# 我得到的是“System.Collections.Generic.List”而不是数据

我尝试在WPF应用程序中使用C制作一个自动完成的文本框，如Google Search，基本上我想做的是创建一个自动完成的文本框，它绑定到SQL数据库表。表中有2个字段的代号和名称，我的代码如下：

在XAML中： 代码隐藏：

    List<string> nameList;
    List<Product> prodList;

    public List<string> SelProd4Sale(string str )
    {
        string constr = "Data Source=.;Initial Catalog=AgamistaStore;User ID=emad2012;Password=emad_2012";
        SqlConnection SqlCon = new SqlConnection(constr);
        SqlCommand SqlCmdProds = new SqlCommand();
        SqlCmdProds.Connection = SqlCon;
        SqlCmdProds.CommandType = CommandType.Text;
        SqlCmdProds.CommandText = "SELECT dbo.ProductsTbl.ProductID,ProductsTbl.ProductBarcode," + 
            "dbo.ProductsTbl.ProductName, dbo.ProductsTbl.SalePrice FROM dbo.ProductsTbl ";
        SqlCon.Open();
        SqlDataAdapter dapProds = new SqlDataAdapter();
        dapProds.SelectCommand = SqlCmdProds;
        DataSet dsProds = new DataSet();
        dapProds.Fill(dsProds);
        SqlCon.Close();
        prodList = new List<Product>();
        for (int i = 0; i < dsProds.Tables[0].Rows.Count; i++)
        {
            prodList.Add(new Product
                            (dsProds.Tables[0].Rows[i]["ProductBarcode"].ToString(),
                            dsProds.Tables[0].Rows[i]["ProductName"].ToString());
        }
        dsProds = null;

        nameList = new List<string>() 
        {
           prodList.ToString()
        };

        return nameList;
    }

    public Window2()
    {
        InitializeComponent();
        SelProd4Sale(txtCAuto.Text);
        txtCAuto.TextChanged += new TextChangedEventHandler(txtAuto_TextChanged);
    }

    #region TextBox-TextChanged-txtAuto
    private void txtAuto_TextChanged(object sender, TextChangedEventArgs e)
    {
        string typedString = txtCAuto.Text.ToUpper();
        List<string> autoList = new List<string>();
        autoList.Clear();

        foreach (string item in nameList)
        {
            if (!string.IsNullOrEmpty(txtCAuto.Text))
            {
                if (item.StartsWith(typedString))
                {
                    autoList.Add(item);
                }
            }
        }

        if (autoList.Count > 0)
        {
            lbSuggestion.ItemsSource = autoList;
            lbSuggestion.Visibility = Visibility.Visible;
        }
        else if (txtCAuto.Text.Equals(""))
        {
            lbSuggestion.Visibility = Visibility.Collapsed;
            lbSuggestion.ItemsSource = null;
        }
        else
        {
            lbSuggestion.Visibility = Visibility.Collapsed;
            lbSuggestion.ItemsSource = null;
        }
    }
    #endregion

    #region ListBox-SelectionChanged-lbSuggestion
    private void lbSuggestion_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (lbSuggestion.ItemsSource != null)
        {
            lbSuggestion.Visibility = Visibility.Collapsed;
            txtCAuto.TextChanged -= new TextChangedEventHandler(txtAuto_TextChanged);
            if (lbSuggestion.SelectedIndex != -1)
            {
                txtCAuto.Text = lbSuggestion.SelectedItem.ToString();
            }
            txtCAuto.TextChanged += new TextChangedEventHandler(txtAuto_TextChanged);
        }
    }
    #endregion
}

class Product
{
    private string _ProductBarcode = "";
    private string _ProductName = "";

    public Product(string prodName,string prodBarcode)
    {
        this._ProductBarcode = prodBarcode;
        this._ProductName = prodName;
    }

    public string ProductBarcode
    {
        get { return _ProductBarcode; }
        set { _ProductBarcode = value; }
    }

    public string ProductName
    {
        get { return _ProductName; }
        set { _ProductName = value; }
    }

}

运行此操作时，我得到的结果是System.Collections.Generic.List，而不是数据

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有人能帮我一下吗？告诉我怎么了？

问题出在以下代码中：

nameList = new List<string>() 
        {
           prodList.ToString()
        };

---

此代码中存在问题：

nameList = new List<string>() 
        {
           prodList.ToString()
        };

---

@爱埃及，就是这样：使用System.Linq；2Kay:我使用了它，调试这个应用程序时，我看到名称列表中有数据，但它没有出现在列表框中，&仍然不知道为什么。@Love\u Egypt，就是这样：使用System.Linq；2Kay：我使用了它，调试这个应用程序时，我看到名称列表中有数据，但它没有出现在列表框中，我仍然不知道为什么。