我正在尝试创建一个自定义可折叠面板以用于我的一个项目。我将它设置为显示哪些边应该能够折叠,它需要一个字符串输入 {"None", "Up", "Right", "Down", "Left", "All"};
。
这是我目前所拥有的:
public partial class CollapsiblePanel : UserControl
{
# region Collapse Direction
List<string> DirectionOptions = new List<string> { "None", "Up", "Right", "Down", "Left", "All" };
[Browsable(true), DefaultValue("All"), Description("Direction panel collapses. 0-none, 1-up, 2-right, 3-down, 4-left, 5-all")]
[ListBindable(true), Editor(typeof(ComboBox), typeof(UITypeEditor))]
private string _direction = "All";
public List<string> Direction
{
get { return DirectionOptions; }
set
{
DirectionOptions = value;
callCollapseDirectionChanged();
}
}
public event Action CollapseDirectionChanged;
protected void callCollapseDirectionChanged()
{
Action handler = CollapseDirectionChanged;
DisplayButtons();
if (handler != null)
{
handler();
}
}
# endregion
public CollapsiblePanel()
{
InitializeComponent();
}
private void DisplayButtons()
{
switch (_direction)
{
case "None":
buttonDown.Visible = false;
buttonUp.Visible = false;
buttonRight.Visible = false;
buttonLeft.Visible = false;
break;
case "Up":
buttonDown.Visible = false;
buttonUp.Visible = true;
buttonRight.Visible = false;
buttonLeft.Visible = false;
break;
case "Right":
buttonDown.Visible = false;
buttonUp.Visible = false;
buttonRight.Visible = true;
buttonLeft.Visible = false;
break;
case "Down":
buttonDown.Visible = true;
buttonUp.Visible = false;
buttonRight.Visible = false;
buttonLeft.Visible = false;
break;
case "Left":
buttonDown.Visible = false;
buttonUp.Visible = false;
buttonRight.Visible = false;
buttonLeft.Visible = true;
break;
case "All":
buttonDown.Visible = true;
buttonUp.Visible = true;
buttonRight.Visible = true;
buttonLeft.Visible = true;
break;
}
}
}
有人可以向我解释如何让设计者为用户提供 DirectionOptions
列表作为可能的值吗?他们可以选择任何一个字符串作为值。
最佳答案
用户应该能够选择多个选项还是只能选择一个?
如果只有一个 - 那么该属性应该是枚举而不是列表。
像这样的东西应该可以工作:
public partial class CollapsiblePanel : UserControl
{
public enum CollapseDirection
{
None,
Up,
Right,
Down,
Left,
All
}
# region Collapse Direction
[Browsable(true), DefaultValue("All"), Description("Direction panel collapses. 0-none, 1-up, 2-right, 3-down, 4-left, 5-all")]
[ListBindable(true), Editor(typeof(ComboBox), typeof(UITypeEditor))]
private CollapseDirection _direction = CollapseDirection.All;
public CollapseDirection Direction
{
get { return _direction; }
set
{
_direction = value;
callCollapseDirectionChanged();
}
}
public event Action CollapseDirectionChanged;
protected void callCollapseDirectionChanged()
{
Action handler = CollapseDirectionChanged;
DisplayButtons();
if (handler != null)
{
handler();
}
}
# endregion
public CollapsiblePanel()
{
InitializeComponent();
}
private void DisplayButtons()
{
switch (_direction)
{
case CollapseDirection.None:
buttonDown.Visible = false;
buttonUp.Visible = false;
buttonRight.Visible = false;
buttonLeft.Visible = false;
break;
case CollapseDirection.Up:
buttonDown.Visible = false;
buttonUp.Visible = true;
buttonRight.Visible = false;
buttonLeft.Visible = false;
break;
case CollapseDirection.Right:
buttonDown.Visible = false;
buttonUp.Visible = false;
buttonRight.Visible = true;
buttonLeft.Visible = false;
break;
case CollapseDirection.Down:
buttonDown.Visible = true;
buttonUp.Visible = false;
buttonRight.Visible = false;
buttonLeft.Visible = false;
break;
case CollapseDirection.Left:
buttonDown.Visible = false;
buttonUp.Visible = false;
buttonRight.Visible = false;
buttonLeft.Visible = true;
break;
case CollapseDirection.All:
buttonDown.Visible = true;
buttonUp.Visible = true;
buttonRight.Visible = true;
buttonLeft.Visible = true;
break;
}
}
}
- 注意 - 这是指南 - 我还没有测试代码,但这应该让你了解你想要实现的目标的大体方向。
关于c# usercontrol 设置自定义属性的选项列表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21917711/