Question

我试图在标题中描述的ListBox.DataTemplate中获取Label.Content，我的问题是，我尝试过的所有方式都给出了错误，下面是我的代码。

XAML：

<ListBox x:Name="UsersList" Margin="644,50,50,31.999" ItemsSource="{Binding}" Background="White">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Grid Height="50" Width="654" MouseEnter="SetHashUser">
                        <Grid.RowDefinitions>
                            <RowDefinition/>
                            <RowDefinition/>
                            <RowDefinition/>
                        </Grid.RowDefinitions>
                        <Label x:Name="HashUser" Content="{Binding Path=USER_HASH}" Visibility="Collapsed"/>
                        <TextBlock x:Uid="RealAcessoUserDisplay" Text="{Binding Path=NOME}" Grid.RowSpan="1" Grid.Row="0" Background="#FFF0F0F0"/>
                        <TextBlock x:Uid="RealAcessoUserDisplay" Text="{Binding Path=NIVEL_ACESSO}" Grid.RowSpan="1" Grid.Row="1" Background="#FFF0F0F0"/>
                        <Menu Grid.RowSpan="1" Grid.Row="2">
                            <MenuItem Header="Ativar"/>
                            <MenuItem Header="Desativar"/>
                            <MenuItem Header="Detalhes" Click="ShowUser"/>
                            <MenuItem Header="Editar"/>
                        </Menu>
                    </Grid>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

数据库连接C＃

        private void Listtks()
    {
        SqlConnection con = new SqlConnection();
        con.ConnectionString = ConfigurationManager.ConnectionStrings["BellaContext"].ConnectionString;
        con.Open();
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "SELECT USER_HASH,NOME,NIVEL_ACESSO FROM USUARIOS";
        cmd.Connection = con;
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataTable dt = new DataTable();
        da.Fill(dt);

        UsersList.ItemsSource = dt.DefaultView;
    }

我的目标是点击列表中的某个项目，SelectedRow获取User_Hash.Content。

事件：

    private void SetHashUser(object sender, MouseEventArgs e)
    {
        display.Content = UsersList.SelectedItem(HashUser.Content);
    }

错误：

Error:

error CS0103: The name "HashUser" does not exist in the current context
error CS1955: The non-callable member "Selector.SelectedItem" can not be used as 
a method.

Answer 1

ListBox SelectedItem不是方法。它是给出列表框的选择项的属性。在这种情况下，选择项将是DataRow，因为您将DataTable绑定到ListBox。

假设USER_HASH为字符串。请尝试以下代码。

private void SetHashUser(object sender, MouseEventArgs e)
    {
        var dataRow = UsersList.SelectedItem;
        display.Content = dataRow.Field<string>("USER_HASH ");
    }

从ListBox.DataTemplate中的Label获取内容

1 个答案: