UserControl集合未标记为可序列化

Question

我必须遗漏一些非常明显的东西.我是C#的新手,但已经用C/C++编程多年了,很抱歉,如果这是一个非常明显的东西;)

[请参阅编辑以获取新问题]

我正在尝试创建一个包含UserControl的节点.我有控件出现在WinForm设计器中,我可以添加节点.但是,当我尝试运行代码时,我收到以下错误:

属性"节点"的代码生成失败.错误是:程序集'应用程序中的'Type App.Node',版本= 1.0.0.0,Culture = neutral,PublicKeyToken = null'未标记为可序列化.

然后我添加的节点都没有显示出来.

这开始让我发疯,据我所知,它被标记为可序列化.

该节点定义如下:

[Serializable]
public class Node : MarshalByRefObject
{
    public Node()
    {
    }

    public Node( String text )
    {
        this.Text       = text;
        this.Checked    = false;
        this.Complete   = false;
    }

    public String       Text        { get; set; }
    public bool         Checked     { get; set; }
    public bool         Complete    { get; set; }
    public bool         Selected    { get; set; }
};

然后我定义一个"集合"如下:

[Serializable]
public class NodeCollection : List< Node >
{
    public NodeCollection() :
        base()
    {
    }
};

正如您所见,集合和节点本身都具有"Serializable"属性集.

错误中提到的Nodes属性定义如下

    private NodeCollection      mNodes  = new NodeCollection();

    [Category( "Behavior" )]
    [Description( "Nodes" )]
    public NodeCollection Nodes
    { 
        get
        {
            return mNodes;
        }
    }

所以有谁知道我在这里做错了什么？

编辑:回应Archeg的评论,这是我的UserControl:

public partial class Control : UserControl
{
    public Control()
    {
        InitializeComponent();
    }

    protected override void OnPaint( PaintEventArgs pe )
    {
        Graphics graph  = pe.Graphics;

        int rowHeight   = Font.Height + 2;

        if ( Nodes != null )
        {
            int yPos    = 0;
            foreach( Node node in this.Nodes )
            {
                // Calculate my various bounding boxes.
                Rectangle nodeBounds    = new Rectangle( Bounds.Left, yPos, Bounds.Width, rowHeight );
                Rectangle lightBounds   = new Rectangle( Bounds.Right - Font.Height, yPos, rowHeight, rowHeight );
                Rectangle spannerBounds = new Rectangle( lightBounds.Left - Font.Height, yPos, rowHeight, rowHeight );
                Rectangle checkBoxBound = new Rectangle( 32, yPos, rowHeight, rowHeight );
                Rectangle textBounds    = new Rectangle( checkBoxBound.Right, yPos, Bounds.Width - (rowHeight * 2) - checkBoxBound.Right, rowHeight );

                // Draw selection box.
                Brush textColour    = Brushes.Black;
                if ( node.Selected )
                {
                    graph.FillRectangle( Brushes.Blue, nodeBounds );
                    textColour      = Brushes.Yellow;
                }

                // Draw node text.
                graph.DrawString( node.Text, Font, textColour, textBounds );

                // Draw Red/Green light
                Image[] lightImages = new Image[] { CompleteLightImage, InCompleteLightImage };
                Image lightImage    = lightImages[node.Complete ? 1 : 0];
                if ( lightImage != null )
                {
                    graph.DrawImage( lightImage, lightBounds );
                }

                // Draw Spanner Icon
                if ( SettingsImage != null )
                {
                    graph.DrawImage( SettingsImage, spannerBounds );
                }
                // Draw check box.
                VisualStyleRenderer renderer    = null;
                VisualStyleElement  ve          = node.Checked ? VisualStyleElement.Button.CheckBox.CheckedPressed : VisualStyleElement.Button.CheckBox.CheckedNormal;
                if (VisualStyleRenderer.IsElementDefined( ve ))
                {
                    renderer = new VisualStyleRenderer( ve );
                }

                if ( renderer != null )
                {
                    renderer.DrawBackground( graph, checkBoxBound );
                }
                else
                {
                    ControlPaint.DrawCheckBox( graph, checkBoxBound, node.Checked ? ButtonState.Checked : ButtonState.Normal );
                }
                yPos    += Font.Height;
            }
        }
    }

    private NodeCollection      mNodes  = new NodeCollection();

    [Category( "Behavior" )]
    [Description( "Nodes" )]
    [DesignerSerializationVisibility( DesignerSerializationVisibility.Content )]
    [MergableProperty( false )]
    [Bindable( false )]
    public NodeCollection Nodes
    { 
        get
        {
            return mNodes;
        }
    }

    public Image CompleteLightImage         { get; set; }
    public Image InCompleteLightImage       { get; set; }
    public Image SettingsImage              { get; set; }
}

我做了一些修改,因为我最初发布的一般有关"DesignerSerializationVisibility"属性已经帮助但我现在得到以下构建错误:

错误MSB3103:无效的Resx文件.无法加载类型App.Node,App,Version = 1.0.0.0,Culture = neutral,PublicKeyToken = null,它在.RESX文件中使用.确保已将必要的引用添加到项目中.

编辑2:值得注意的是,我的问题只发生在我在设计器中添加一堆节点然后我得到上面的Resx错误.如果我从代码手动添加节点,那么这一切都按照我的预期运行...

Answer 1

我相信您遇到此问题,因为Designer会自动尝试序列化所有公共UserControl属性.如果您的自定义UserControl设计时支持不需要此属性,则可以添加"DesignerSerializationVisibility"属性:

[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] 

或者只是省略属性get{}和set{}方法,并将其用作公共字段.

希望能帮助到你!