Question

我在HelixViewport3D中添加了不同类型的3D对象。我的问题是如何将3D对象/模型保存在文件中并稍后打开，就像典型的CAD应用程序一样。

HelixViewport3D是用户在控件UserControl.xaml中定义的。

UserControl如下所示：

<UserControl x:Class="SubWindows.UserControl1"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:HelixToolkit="clr-namespace:HelixToolkit.Wpf;assembly=HelixToolkit.Wpf"
         Height="350" Width="525" MouseRightButtonDown="OnMouseRightButtonDown" TabIndex="0" MouseMove="UserControl_MouseMove" Opacity="1">
<Grid>
<HelixToolkit:HelixViewport3D x:Name="ViewPort" ZoomExtentsWhenLoaded="True" ItemsSource="{Binding}">
        <HelixToolkit:SunLight Brightness="0.4" Ambient="0.1" />
        <ModelVisual3D Content="{Binding Model}"/>
        <ModelVisual3D x:Name="SolidModels"/>
        <ModelVisual3D x:Name="ScreenLineModels"/>
        <ModelVisual3D x:Name="DimLinesModels"/>
        <ModelVisual3D x:Name="TagsModels"/>
    </HelixToolkit:HelixViewport3D>
    <Canvas Name="TagsOverlay" IsHitTestVisible="False" ClipToBounds="False"/>
    <Canvas Name="DimsOverlay" IsHitTestVisible="False" ClipToBounds="False" />
</Grid>

保存文件事件如下：

    private void saveToolStripMenuItem_Click(object sender, EventArgs e)
    {
        SaveFileDialog saveFileDialog = new SaveFileDialog();
        saveFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
        saveFileDialog.Filter = "pvp Files (*.pvp)|*.pvp|Text Files (*.xaml)|*.xaml|All Files (*.*)|*.*";

        if (saveFileDialog.ShowDialog(this) == DialogResult.OK)
        {
            string FileName = saveFileDialog.FileName;
            string fileNameExtention = System.IO.Path.GetExtension(FileName);
            fileNameExtention = fileNameExtention.ToLower();
            if (fileNameExtention == ".xaml")
            {
                uc.ViewPort.Export(FileName);
            }
        }
    }

＆＃34;我们＆＃34;是UserControl1的一个实例，定义为UserControl1 uc = new UserControl1（）;当我saveToolStripMenuItem_Click保存文件时，下面有一个错误快照。

但ViewPort的一部分以xaml格式保存。

任何解决问题的意见都将受到赞赏。

Answer 1

首先，您需要使用Export（）导出viewport3D [例如Helix Vieport3D的viewport.Export（/sample.xaml）方法，它将为您提供一个XAML文件（如果您将模型导出为.xaml），其中包含键值，稍后将导出的XAML文件添加到项目目录中，并使用下面的代码。

UserConrol.xaml文件代码

   <UserControl.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="<Path towards your exported xaml file>\sample.xaml"/>
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>

</UserControl.Resources>

导入XAML文件的代码

  HelixViewport3D viewport;   //Extra viewport to store the childrens
        viewport= (HelixViewport3D)FindResource("Model");
         // "Model" is the key value of my exported XAML file

        List<Visual3D> items = new List<Visual3D>();    // List is use to store the childrens of ResourceDirectories xaml. 

        //Adds the children inside List
        for (int i=(viewport.Children.Count - 1);i>=0;i--)
        {
            items.Add(viewport.Children[i]);
            viewport.Children.RemoveAt(i);
        }

        //viewport3D.Children.Clear();

        foreach(Visual3D item in items)
        {
            viewport3D.Children.Add(item);
        }

如何将视口中的3D对象保存到文件并稍后打开？

1 个答案: