Question

我目前正在开发一个包含ListBox的WPF应用程序，其中ListBoxItem内有StackPanel个Image和Label在StackPanel内。所有ListBoxItem都是通过数据库值生成的，并显示在ListBox控件中。但是，当用户选择一个ListBoxItem时如何从Label获取值？这是我的XAML代码：

<ListBox Name="LIstBProdutos"
         ScrollViewer.HorizontalScrollBarVisibility="Disabled"
         HorizontalAlignment="Left"
         Height="336"
         Margin="39,98,0,0"
         VerticalAlignment="Top"
         Width="358">
    <ListBox.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapPanel IsItemsHost="True"
                       Orientation="Horizontal" />
        </ItemsPanelTemplate>
    </ListBox.ItemsPanel>
</ListBox>

方法背后的代码

private void BTTProduct_Click(object sender, RoutedEventArgs e) 
{ 
    ListProd.Items.Clear();
    SqlDataReader reader;
    string consulta = "";
    if (CCKBOXFilterProdCat.IsChecked == true)
    {
        var idCategoria = Int32.Parse(((DataRowView)CBBFilterCatProd.SelectedItem)["id"].ToString());
        consulta = "and categoria ='" + idCategoria + "'";
    }
    c.ConsultaSql("select * from produto where nome like '%" + TBXNomeProduto.Text + "%'" + "" + consulta + " ");
    c.NonQuery();
    c.DataSet();
    reader = c.cm.ExecuteReader();
    int nome = 0;
    for (int a = 0; a < c.ds.Tables[0].Rows.Count; a++)
    {
        nome = nome+1;
        ListBoxItem lbi = new ListBoxItem();
        lbi.Width = 100;
        lbi.Height = 152;
        Image img = new Image();
        StackPanel stp = new StackPanel();
        Label lbl = new Label();
        Label lbl2 = new Label();
        stp.Name = "Stack"+ nome.ToString();
        reader.Read();
        string IdImagem = reader["id"].ToString();
        lbl.Content = reader["nome"].ToString();
        lbl2.Content = "R$ " + reader["preco"].ToString();              
        var pa = System.IO.Path.Combine(Environment.CurrentDirectory, "produtos/");
        var uri = new Uri(pa + IdImagem + ".jpg");
        BitmapImage bm = new BitmapImage(uri);
        img.Source = bm;
        stp.Children.Add(img);
        stp.Children.Add(lbl);
        stp.Children.Add(lbl2);
        stp.ToolTip = reader["nome"].ToString() + "\n Somente R$ " + reader["preco"].ToString();
        lbi.Content = stp;                
        ListProd.Items.Add(lbi);                
    }
}

如何从ListBoxItem获取价值？

Answer 1

你可以做这样的事情

您可以使用要获取的数据库字段创建一个类

public class DbRecord
{
    public string ImagePath { get; set; }
    public string nome { get; set; }
    public string preco { get; set; }
}

现在在检查ListBox中是否选择了任何记录后，您可以创建我们创建的类的对象，然后获取记录。

if (ListProd.SelectedIndex >= 0)
{
    DbRecord Record = new DbRecord();
    Record = (ListProd.SelectedItem) as DbRecord;
    string nome = Record.nome;
    string preco = Record.preco;
}

您拥有变量中两个标签的值。

WPF如何从ListBoxItem

1 个答案: