WPF - 如何读取列表框项目中和绑定与数据库的复选框项目的值？ [英] WPF - How to read values from checkbox items that are inside listbox item and bindied with database?

问题描述

我建立一个应用程式，将根据在复选框上勾选的项目从数据库返回数据。我已通过绑定数据成功显示数据库中的数据。像这样：

I am building an app that will return data from database based on the items that are checked on check box. I have successfully displayed data from database by binding the data. Like this:

XAML：

<ListBox x:Name="listBox1" ItemsSource="{Binding}" HorizontalAlignment="Left" Height="52" Margin="141,264,0,0" VerticalAlignment="Top" Width="307" SelectionMode="Multiple">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <CheckBox x:Name="checkBox1" IsChecked="{Binding IsSelected}"  Content="{Binding NacinGrejanja}"/>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

C＃：

       private void Window_Loaded_1(object sender, RoutedEventArgs e)
    {
        Dataset1 ds= new Dataset1 ();
        GrejanjeTableAdapter gta = new GrejanjeTableAdapter();
        gta.Fill(ds.Grejanje);
        listbox1.DataContext = ds.Grejanje;
    }

但我无法弄清楚如何从检查值中提取字符串值，然后再次在数据库中搜索这些值。我不能通过代码访问checkBox1的任何属性。

But I am unable to figure out how to extract string values from checked values and then again search for those values in database. I can't access any of the properties for checkBox1 through code.

此外，我想首先检查是否任何复选框项目被选中。 / p>

Also I would want first to check if any of the checkbox items is checked in the first place.

推荐答案

您可以使用以下linq：

You can use following linq:

ds.Grejanje.Where(item => item.IsSelected == true);

它将返回已检查的项目列表。

It will return the list of items which are checked.

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