我有一个 UITypeEditor 类,所以在 PropertyGrid 属性集合中是 CheckListBox。例如,我在杂货清单中创建了一个产品类别(水果、蔬菜),并列出了我需要选择属于该类别的所有产品。那些。我添加了一个空的杂货清单新类别“水果”,并且该类别是从包含以下产品的全球列表中选择的:“苹果”、“梨”、“香蕉”。接下来我想创建另一个类别,例如“蔬菜”,然后从一些蔬菜的全局列表中进行选择。问题是后一个品类建立后,所有其他品类都收到同一组产品。这是代码:
public class CheckedListBoxUiTypeEditor : UITypeEditor
{
private readonly CheckedListBox _checklisbox1 = new CheckedListBox();
private IWindowsFormsEditorService _es;
public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
{
return UITypeEditorEditStyle.DropDown;
}
public override bool IsDropDownResizable => true;
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
if (provider != null)
{
_es = provider.GetService(typeof (IWindowsFormsEditorService)) as IWindowsFormsEditorService;
}
if (_es != null)
{
LoadValues(value);
_es.DropDownControl(_checklisbox1);
}
_result.Clear();
foreach (string str in _checklisbox1.CheckedItems)
{
_result.Add(str);
}
return _result;
}
private readonly List<string> _defaultList = FormLas.ListAll;
private readonly List<string> _result = new List<string>();
private void LoadValues(object value)
{
Hashtable table = new Hashtable();
foreach (string str in _defaultList)
{
table.Add(str, false);
}
_checklisbox1.Items.Clear();
foreach (DictionaryEntry dic in table)
{
_checklisbox1.Items.Add(dic.Key, (bool) dic.Value);
}
if (((List<string>) value).Count > 0)
{
foreach (string str in (List<string>)value)
{
for (int i = 0; i < _checklisbox1.Items.Count; i++)
{
if (str == _checklisbox1.Items[i])
{
_checklisbox1.SetItemChecked(i, true);
}
}
}
}
}
}