[英]C# Winforms Designer won't open because it cannot find type in same assembly
[英]C# Winforms Visual Studio designer cannot find custom type
我有一个带有通用类型的自定义类型的自定义控件。 此列表是公共定义的:
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content), Editor(typeof(ButtonPanelXEditor), typeof(UITypeEditor))]
public List<CompactButton> CompactButtons
{
get { return _compactButtons; }
set { _compactButtons = value; }
}
当我将此控件添加到表单并构建项目时,出现以下错误:
错误1找不到名称的类型。 类型名称为“ ButtonPanelX.CompactButton,ButtonPanelX,Version = 1.0.0.0,Culture = neutral,PublicKeyToken = null”。 127行,位置5。D:\\ Projecten \\ ButtonPanelX \\ ButtonPanelX \\ Form1.resx 127 5 ButtonPanelX
当我使用字符串而不是自定义对象时,设计器确实会保存我的列表。 CompactButton
具有[Serializable]
属性,并从ISerializable
派生
我该怎么做才能解决此问题?
编辑:
public class ButtonPanelXEditor : UITypeEditor
{
public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
{
if (context != null && context.Instance != null)
// We will use a window for property editing.
return UITypeEditorEditStyle.Modal;
return base.GetEditStyle(context);
}
public override object EditValue(System.ComponentModel.ITypeDescriptorContext context,
IServiceProvider provider, object value)
{
context.OnComponentChanging();
ButtonPanel b = context.Instance as ButtonPanel;
FooBar form = new FooBar();
form.Buttons = b.CompactButtons;
form.ShowDialog();
b.CompactButtons = form.Buttons;
b.DrawButtons();
context.OnComponentChanged();
return form.Buttons;
}
}
编辑2:
[Serializable]
public partial class ButtonPanel : UserControl
{
private ArrayList _compactButtons;
public ButtonPanel()
{
InitializeComponent();
_compactButtons = new ArrayList();
AddButtons();
this.Load += new EventHandler(ButtonPanel_Load);
}
void ButtonPanel_Load(object sender, EventArgs e)
{
DrawButtons();
}
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content), Editor(typeof(ButtonPanelXEditor), typeof(UITypeEditor))]
public ArrayList CompactButtons
{
get { return _compactButtons; }
}
public void DrawButtons()
{
baseButton1.Visible = ((CompactButton)_compactButtons[0]).Visible;
baseButton2.Visible = ((CompactButton)_compactButtons[1]).Visible;
}
private void AddButtons()
{
/* Buttons baseButton1 and baseButton2 are created by the designer */
CompactButton c = new CompactButton();
c.Enabled = baseButton1.Enabled;
c.Visible = baseButton1.Visible;
c.Name = baseButton1.Name;
CompactButton c2 = new CompactButton();
c2.Enabled = baseButton2.Enabled;
c2.Visible = baseButton2.Visible;
c2.Name = baseButton2.Name;
_compactButtons.Add(c);
_compactButtons.Add(c2);
}
}
您可以尝试将按钮序列化为后面的代码,而不是将按钮序列化为资源文件。 为此,您需要为您的CompactButton
类型实现自定义TypeDescriptor
,并在那里处理到InstanceDescriptor
转换。 看一下如何实现TypeConverter 。 例:
[TypeConverter(typeof(CompactButtonTypeConverter))]
public class CompactButton: ... {
...
}
public class CompactButtonTypeConverter: TypeConverter {
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
if (destinationType == typeof(InstanceDescriptor))
return true;
return base.CanConvertTo(context, destinationType);
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
if (destinationType == typeof(InstanceDescriptor) && value is CompactButton) {
// This assumes you have a public default constructor on your type.
ConstructorInfo ctor = typeof(CompactButton).GetConstructor();
if (ctor != null)
return new InstanceDescriptor(ctor, new object[0], false);
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
有关更多信息,请参见InstanceDescriptor类。
更新 :至于您的UITypeEditor
和CompactButtons属性,则不需要设置器。 更改您的CompactButtons属性,如下所示:
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content), Editor(typeof(ButtonPanelXEditor), typeof(UITypeEditor))]
public List<CompactButton> CompactButtons
{
get { return _compactButtons; } // _compactButtons must of course be initialized.
}
然后,您可以像这样实现UITypeEditor
的EditValue方法:
public override object EditValue(System.ComponentModel.ITypeDescriptorContext context,
IServiceProvider provider, object value) {
if (context == null || provider == null)
return null;
var b = context.Instance as ButtonPanel;
if (b == null)
return value;
var editorService = (IWindowsFormsEditorService)
provider.GetService(typeof(IWindowsFormsEditorService));
if (editorService == null)
return null;
// This constructor should copy the buttons in its own list.
using (var form = new FooBar(b.CompactButtons)) {
if (editorService.ShowDialog(form) == DialogResult.OK && context.OnComponentChanging()) {
b.CompactButtons.Clear();
b.CompactButtons.AddRange(form.Buttons);
context.OnComponentChanged();
}
}
return value;
}
如果您的编辑器表单不是很专业,则可以尝试CollectionEditor 。
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