Question

我有一个WPF xaml模板和相关代码，后面有各种控件。用户可以移动这些控件，以便一个人具有所需的布局。但是，一旦用户重新启动程序，控件将返回其原始位置。如何制作以便用户可以保存布局？

Answer 1

您可以保存，重新加载布局（xaml）：

用户更改布局 [on Window Closing event] 后，您可以使用XamlWriter static class保存基于XAML文件库更改的布局。实际上，您序列化容器控件并将其保存在文件中。
此外，您还需要一些代码 [在InitializeComponent()之后的窗口构造函数中到容器控件[及其控件]的重新加载序列化布局来自档案。

我放了一个样本（由Matt Searles编写），here：

<StackPanel>
    <WrapPanel x:Name="wrapPanel1" Height="200"></WrapPanel>
    <Button Click="AddButton">Add Button</Button>
    <Button Click="SaveButtons">Save Buttons</Button>
    <Button Click="ReloadButtons">Reload Buttons</Button>   
</StackPanel>

代码背后：

/// <summary>
/// Add a button to wrapPanel1
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void AddButton(object sender, RoutedEventArgs e)
{
    // Create the Button.
    Button button = new Button();
    button.Height = 50;
    button.Width = 100;
    button.Background = Brushes.AliceBlue;
    button.Content = "Click Me";

    wrapPanel1.Children.Add(button);
}

/// <summary>
/// Save wrapPanel1 to AA.xaml
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SaveButtons(object sender, RoutedEventArgs e)
{
    StringBuilder outstr = new StringBuilder();

    XmlWriterSettings settings = new XmlWriterSettings();
    settings.Indent = true;
    settings.OmitXmlDeclaration = true;
    settings.NewLineOnAttributes = true;


    XamlDesignerSerializationManager dsm = new XamlDesignerSerializationManager(XmlWriter.Create(outstr, settings));
    dsm.XamlWriterMode = XamlWriterMode.Expression;

    XamlWriter.Save(wrapPanel1, dsm);
    string savedControls = outstr.ToString();

    File.WriteAllText(@"AA.xaml", savedControls);
}

/// <summary>
/// Reload the buttons in AA.xaml
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ReloadButtons(object sender, RoutedEventArgs e)
{
    StreamReader sR = new StreamReader(@"AA.xaml");
    string text = sR.ReadToEnd();
    sR.Close();

    StringReader stringReader = new StringReader(text);
    XmlReader xmlReader = XmlReader.Create(stringReader);

    WrapPanel wp = (WrapPanel)System.Windows.Markup.XamlReader.Load(xmlReader);

    wrapPanel1.Children.Clear(); // clear the existing children

    foreach (FrameworkElement child in wp.Children) // and for each child in the WrapPanel we just loaded (wp)
    {
        wrapPanel1.Children.Add(CloneFrameworkElement(child)); // clone the child and add it to our existing wrap panel
    }           
}

/// <summary>
/// Clone a framework element by serializing and deserializing it
/// </summary>
/// <param name="originalElement"></param>
/// <returns></returns>
FrameworkElement CloneFrameworkElement(FrameworkElement originalElement)
{
    string elementString = XamlWriter.Save(originalElement);

    StringReader stringReader = new StringReader(elementString);
    XmlReader xmlReader = XmlReader.Create(stringReader);
    FrameworkElement clonedElement = (FrameworkElement)XamlReader.Load(xmlReader);

    return clonedElement;
}

用户在WPF中保存可自定义的模板

1 个答案: