使用运行时生成的控件保存控件窗口并重新加载为以前的状态

Posted 2023-05-07

【中文标题】使用运行时生成的控件保存控件窗口并重新加载为以前的状态

【英文标题】：Save window of controls with runtime geneated controls and reload with as previous state

【发布时间】：2012-10-17 07:10:42

【问题描述】：

我用你的控制按钮创建了项目。 AddButton 创建运行时按钮控件并将其添加到 canvas1 中。当我右键单击运行时生成的控件时，会弹出新窗口。我想保存这个窗口并以与我离开时相同的状态重新加载它。我使用 xml 序列化，它会加载但单击该按钮不起作用。

这是我的代码：

private void AddButton_Click(object sender, RoutedEventArgs e)


                Button b = new Button();
                b.MinHeight = 23;
                b.MinWidth = 73;             
                b.SetValue(Canvas.LeftProperty, e.GetPosition(this).X);
                b.SetValue(Canvas.TopProperty, e.GetPosition(this).Y);
                b.Content = i.ToString();          
                canvas1.Children.Add(b);      
                b.MouseRightButtonUp += new MouseButtonEventHandler(NewButton_Click);



 private void NewButton_Click(object sender, EventArgs e)
        
            Button btn = (Button)sender;

            ContextMenu pMenu = new ContextMenu();
            MenuItem item1 = new MenuItem();
            item1.Header = "Properties";           
            pMenu.Items.Add(item1);
            btn.ContextMenu = pMenu;
            item1.Click += new RoutedEventHandler(item1_Click);
        


 private void item1_Click(object sender, EventArgs e)
        
            MenuItem btn = (MenuItem)sender;
         ControlProp c = new ControlProp();
         c.ShowDialog();  

             

  private void Save_Click(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(this.canvas1, dsm);
            string savedControls = outstr.ToString();

            //Show Dialog Box
            Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();
            dlg.FileName = "Document"; // Default file name
            dlg.DefaultExt = ".xaml"; // Default file extension
            dlg.Filter = "Xaml documents (.xaml)|*.xaml"; // Filter files by extension

            // Show save file dialog box
            Nullable<bool> result = dlg.ShowDialog();

            // Process save file dialog box results
            if (result == true)
            
                // Save document
                string filename = dlg.FileName;
                File.WriteAllText(filename, savedControls);
            

        

        private void OpenFile_Click(object sender, RoutedEventArgs e)
        
            //Open FileDialog
            string filename;
            Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
            dlg.FileName = "Document"; // Default file name
            dlg.DefaultExt = ".xaml"; // Default file extension
            dlg.Filter = "Xaml documents (.xaml)|*.xaml"; // Filter files by extension

            // Show save file dialog box
            Nullable<bool> result = dlg.ShowDialog();

            // Process save file dialog box results
            if (result == true)
            
                // Save document
                 filename = dlg.FileName;

                //Open Xaml
                 StreamReader sR = new StreamReader(filename);
                 string text = sR.ReadToEnd();
                 sR.Close();

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

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

                 canvas1.Children.Clear(); // clear the existing children

                 foreach (FrameworkElement child in wp.Children) // and for each child in the WrapPanel we just loaded (wp)
                 
                     canvas1.Children.Add(CloneFrameworkElement(child)); // clone the child and add it to our existing wrap panel
                       
            


        

        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;
        

简而言之，我想保存用户在运行时创建的项目，然后像 mspaint 一样使用保存项目和打开项目工具重新打开它。

【参考方案1】：

您可以使用 XamlWriter (MSDN)