我一定是遗漏了一些非常明显的东西。我是 C# 的新手,但多年来一直使用 C/C++ 进行编程,如果有明显的问题,我深表歉意;)
[请参阅编辑以了解较新的问题]
我正在尝试创建一个包含 UserControl 的节点。我让 Control 出现在 WinForm 设计器中,我可以向它添加节点。但是,当我尝试运行代码时,出现以下错误:
Code generation for property 'Nodes' failed. Error was: 'Type App.Node' in Assembly 'App, version=1.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable.
然后我添加的节点都没有出现。
这开始让我发疯了,据我所知,它被标记为可序列化。
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()
{
}
};
如您所见,集合和节点本身都设置了“Serializable”属性。
报错中提到的Nodes属性定义如下
private NodeCollection mNodes = new NodeCollection();
[Category( "Behavior" )]
[Description( "Nodes" )]
public NodeCollection Nodes
{
get
{
return mNodes;
}
}
所以有人知道我在这里做错了什么吗?
编辑:作为对 Archeg 评论的回应,这是我的用户控件:
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; }
}
自从我最初发布一般与“DesignerSerializationVisibility”属性相关的内容以来,我进行了一些修改,这对我有所帮助,但我现在遇到以下构建错误:
error MSB3103: Invalid Resx file. Could not load type App.Node, App, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null which is used in the .RESX file. Ensure that the necessary references have been added to your project.
编辑 2:值得注意的是,我的问题仅在我在设计器中添加一堆节点时出现,然后出现上述 Resx 错误。如果我从代码中手动添加节点,那么一切都会像我期望的那样工作......
最佳答案
我相信您遇到此问题是因为 Designer 会自动尝试序列化所有公共(public) UserControl 属性。如果自定义 UserControl 设计时支持不需要此属性,则可以添加“DesignerSerializationVisibility”属性:
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
或者简单地省略属性的 get{}
和 set{}
方法并将其用作公共(public)字段。
希望对您有所帮助!
关于c# - UserControl 集合未标记为可序列化,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9789066/