我想从PropertyGrid中的可浏览属性中排除Property MiddleName。
当我在Person类的界面ICustomTypeDescriptor上闲逛时,我在启动应用程序时遇到此异常。
我错了什么?
System.ArgumentException: 无法绑定到DataSource上的属性或列TestNamefür。 Parametername:dataMember bei System.Windows.Forms.BindToObject.CheckBinding() bei System.Windows.Forms.Binding.SetListManager(BindingManagerBase bindingManagerBase) bei System.Windows.Forms.ListManagerBindingsCollection.AddCore(Binding dataBinding)
public class Person : ICustomTypeDescriptor
{
public string TestName { get; set; }
public string FirstName { get; set; }
public string MiddleName { get; set; }
public string LastName { get; set; }
AttributeCollection ICustomTypeDescriptor.GetAttributes()
{
return TypeDescriptor.GetAttributes(this, true);
}
string ICustomTypeDescriptor.GetClassName()
{
return TypeDescriptor.GetClassName(this, true);
}
string ICustomTypeDescriptor.GetComponentName()
{
return TypeDescriptor.GetComponentName(this, true);
}
TypeConverter ICustomTypeDescriptor.GetConverter()
{
return TypeDescriptor.GetConverter(this, true);
}
EventDescriptor ICustomTypeDescriptor.GetDefaultEvent()
{
return TypeDescriptor.GetDefaultEvent(this, true);
}
PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty()
{
return TypeDescriptor.GetDefaultProperty(this, true);
}
object ICustomTypeDescriptor.GetEditor(Type editorBaseType)
{
return TypeDescriptor.GetEditor(this, editorBaseType, true);
}
EventDescriptorCollection ICustomTypeDescriptor.GetEvents(Attribute[] attributes)
{
return TypeDescriptor.GetEvents(this, attributes, true);
}
EventDescriptorCollection ICustomTypeDescriptor.GetEvents()
{
return TypeDescriptor.GetEvents(this, true);
}
PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attributes)
{
Debug.Print("GetProperties()");
Print("Attributes is {0}null", attributes == null ? "" : "not ");
PropertyDescriptorCollection origCol = TypeDescriptor.GetProperties(this, attributes, true);
bool wantBrowsable = attributes.Contains<Attribute>(new BrowsableAttribute(true));
Debug.Print("Wants Browsable: {0}", wantBrowsable);
List<PropertyDescriptor> newCol = new List<PropertyDescriptor>();
foreach (PropertyDescriptor pd in origCol)
{
System.Diagnostics.Debug.Print("Property Name: {0}", pd.Name);
if (pd.Name != "MiddleName")
{
System.Diagnostics.Debug.Print("Property {0} is included.", pd.Name);
newCol.Add(pd);
}
}
return new PropertyDescriptorCollection(newCol.ToArray());
}
PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties()
{
return ((ICustomTypeDescriptor)this).GetProperties(null);
}
object ICustomTypeDescriptor.GetPropertyOwner(PropertyDescriptor pd)
{
return this;
}
}
更新+解决方案:
标有Browseable(false)
的属性无法绑定!所以我这样做了:
Why Browsable attribute makes property not bindable?
来自 Marc Gravell 的最后一个解决方案就像呼吸一样!
答案 0 :(得分:0)
我测试过你的代码似乎在我的测试中起作用。也许我们需要更多代码才能理解问题所在。
无论如何,如果您的唯一目的只是隐藏MiddleName
的{{1}}属性,为什么不简单地将Propertygrid
属性放在该属性上,而不是实现[Browsable(false)
}?
它会为你节省很多代码......
修改强>
我的意思是,像这样的代码必须工作:
ICustomTypeDescriptor
并且应该正确隐藏属性网格中的public class Person
{
public string TestName { get; set; }
public string FirstName { get; set; }
[Browsable(false)]
public string MiddleName { get; set; }
public string LastName { get; set; }
}
属性...