Question

我有一个已由MySql表填充的listBox。我想改变listBox的内容无论如何用户按下按钮，我为此做的是用我的代码中的sql类创建者调用从表中过滤数据的新查询，问题是如何在该按钮事件中更改列表框内容处理程序？这是我的代码

private void shirtSelect_Click(object sender, RoutedEventArgs e)
{

    string shirt = "SELECT * FROM viewermenu.grament where type = 'shirt'";
    var shirtTable = new DatabaseTable();
    string id = null;
    shirtTable.GetTable(shirt, id);

    listBox.DataContext = shirtTable;

}

和xaml方：

<ListBox  x:Name="listBox" BorderBrush="Transparent" Background="Transparent" SelectionChanged="listBox_SelectionChanged" SelectionMode="Single" ItemsSource="{Binding Source={StaticResource NamesTable}}" it HorizontalContentAlignment="Center" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled" RenderTransformOrigin="0.5,0.5" Margin="0" Padding="0,0,0,317" >
    <ListBox.ItemsPanel>
        <ItemsPanelTemplate>
            <StackPanel Orientation="Horizontal" />
        </ItemsPanelTemplate>
    </ListBox.ItemsPanel>
    <ListBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal"  Height="200" Width="200" >
                <Image Margin="3" Source="{Binding pic_path}" RenderOptions.BitmapScalingMode="HighQuality" RenderOptions.EdgeMode="Aliased"/>
                <TextBox Margin="3" Text="{Binding name}" Visibility="Visible"/>

            </StackPanel>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

和databbase表类：

        public DataTable GetTable(String query, String sortBy)
    {
        String connString = "server=192.168.*.**;uid=*****;pwd=****;database=viewermenu";
        connection = new MySqlConnection(connString);
        adapter = new MySqlDataAdapter(query, connection);
        DataTable dataTable = new DataTable();
        adapter.Fill(dataTable);
        dataTable.DefaultView.Sort = sortBy;
        return dataTable;      
    }
}

Answer 1

给定代码中的一些错误，纠正它们并试一试。

1.将IsItemsHost添加到ItemsPanelTemplate：

<ListBox.ItemsPanel>
    <ItemsPanelTemplate>
        <StackPanel Orientation="Horizontal" IsItemsHost="True"/>
    </ItemsPanelTemplate>
</ListBox.ItemsPanel>

2.定义ShirtData课程：

public class ShirtData
{
    public string pic_path { get; set; }

    public string name { get; set; }

    public ShirtData(string path, string theName)
    {
        pic_path = path;
        name = theName;
    }
}

3.在代码隐藏（某些伪代码）中设置ItemsSource：

.......

var table = shirtTable.GetTable(shirt, id);
var shirts = new List<ShirtData>();

foreach (DataRow row in table.Rows)
{
    var shirtData = new ShirtData(row["pic_path"].ToString(), row["name"].ToString());
    shirts.Add(shirtData);
}

listBox.ItemsSource = shirts;

Answer 2

您需要修改下面ItemsSource="{Binding Source={StaticResource NamesTable}}"绑定的属性。

list

即，假设该属性为<?php function buildTree(array &$elements, $parentId = 0) { $branch = array(); foreach ($elements as $element) { if ($element['parentid'] == $parentId) { // recursion: $children = buildTree($elements, $element['id']); if ($children) { $element['children'] = $children; } $branch[$element['id']] = $element; unset($elements[$element['id']]); } } return $branch; } $rows = [ ['id' => 1, 'firstname' => 'john1', 'lastname' => 'doe', 'parentid' => 0], ['id' => 2, 'firstname' => 'john2', 'lastname' => 'doe', 'parentid' => 1], ['id' => 3, 'firstname' => 'john3', 'lastname' => 'doe', 'parentid' => 1], ['id' => 4, 'firstname' => 'john4', 'lastname' => 'doe', 'parentid' => 0], ['id' => 5, 'firstname' => 'john5', 'lastname' => 'doe', 'parentid' => 3], ]; print_r(buildTree($rows));，就像通常使用列表一样添加和删除项目。

通过单击更改MySQL中的listBox内容

2 个答案: