关于propertygrid

Question

实例中有一个属性是enum类型，能不能在设计时实现复选功能，结果是枚举值的逻辑“或”关系。

Answer 1

可以不过你要自己实现它的设计类，我举个简单的例子给你。weifenluo.DockPanel [Flags]
[Serializable]
[Editor(typeof(DockAreasEditor), typeof(System.Drawing.Design.UITypeEditor))]
public enum DockAreas
{
Float = 1,
DockLeft = 2,
DockRight = 4,
DockTop = 8,
DockBottom = 16,
Document = 32
}[LocalizedCategory("Category_Docking")]
[LocalizedDescription("DockContent_DockAreas_Description")] [DefaultValue(DockAreas.DockLeft|DockAreas.DockRight|DockAreas.DockTop|DockAreas.DockBottom|DockAreas.Document|DockAreas.Float)]
public DockAreas DockAreas
{
get { return DockHandler.DockAreas; }
set { DockHandler.DockAreas = value; }
}设计器代码
using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms;
using System.Windows.Forms.Design;namespace WeifenLuo.WinFormsUI.Docking
{
internal class DockAreasEditor : UITypeEditor
{
private class DockAreasEditorControl : System.Windows.Forms.UserControl
{
private CheckBox checkBoxFloat;
private CheckBox checkBoxDockLeft;
private CheckBox checkBoxDockRight;
private CheckBox checkBoxDockTop;
private CheckBox checkBoxDockBottom;
private CheckBox checkBoxDockFill;
private DockAreas m_oldDockAreas; public DockAreas DockAreas
{
get
{
DockAreas dockAreas = 0;
if (checkBoxFloat.Checked)
dockAreas |= DockAreas.Float;
if (checkBoxDockLeft.Checked)
dockAreas |= DockAreas.DockLeft;
if (checkBoxDockRight.Checked)
dockAreas |= DockAreas.DockRight;
if (checkBoxDockTop.Checked)
dockAreas |= DockAreas.DockTop;
if (checkBoxDockBottom.Checked)
dockAreas |= DockAreas.DockBottom;
if (checkBoxDockFill.Checked)
dockAreas |= DockAreas.Document; if (dockAreas == 0)
return m_oldDockAreas;
else
return dockAreas;
}
} public DockAreasEditorControl()
{
checkBoxFloat = new CheckBox();
checkBoxDockLeft = new CheckBox();
checkBoxDockRight = new CheckBox();
checkBoxDockTop = new CheckBox();
checkBoxDockBottom = new CheckBox();
checkBoxDockFill = new CheckBox(); SuspendLayout(); checkBoxFloat.Appearance = Appearance.Button;
checkBoxFloat.Dock = DockStyle.Top;
checkBoxFloat.Height = 24;
checkBoxFloat.Text = Strings.DockAreaEditor_FloatCheckBoxText;
checkBoxFloat.TextAlign = ContentAlignment.MiddleCenter;
checkBoxFloat.FlatStyle = FlatStyle.System;

checkBoxDockLeft.Appearance = System.Windows.Forms.Appearance.Button;
checkBoxDockLeft.Dock = System.Windows.Forms.DockStyle.Left;
checkBoxDockLeft.Width = 24;
checkBoxDockLeft.FlatStyle = FlatStyle.System; checkBoxDockRight.Appearance = System.Windows.Forms.Appearance.Button;
checkBoxDockRight.Dock = System.Windows.Forms.DockStyle.Right;
checkBoxDockRight.Width = 24;
checkBoxDockRight.FlatStyle = FlatStyle.System; checkBoxDockTop.Appearance = System.Windows.Forms.Appearance.Button;
checkBoxDockTop.Dock = System.Windows.Forms.DockStyle.Top;
checkBoxDockTop.Height = 24;
checkBoxDockTop.FlatStyle = FlatStyle.System; checkBoxDockBottom.Appearance = System.Windows.Forms.Appearance.Button;
checkBoxDockBottom.Dock = System.Windows.Forms.DockStyle.Bottom;
checkBoxDockBottom.Height = 24;
checkBoxDockBottom.FlatStyle = FlatStyle.System;

checkBoxDockFill.Appearance = System.Windows.Forms.Appearance.Button;
checkBoxDockFill.Dock = System.Windows.Forms.DockStyle.Fill;
checkBoxDockFill.FlatStyle = FlatStyle.System; this.Controls.AddRange(new Control[] {
 checkBoxDockFill,
 checkBoxDockBottom,
 checkBoxDockTop,
 checkBoxDockRight,
 checkBoxDockLeft,
 checkBoxFloat}); Size = new System.Drawing.Size(160, 144);
BackColor = SystemColors.Control;
ResumeLayout();
} public void SetStates(DockAreas dockAreas)
{
m_oldDockAreas = dockAreas;
if ((dockAreas & DockAreas.DockLeft) != 0)
checkBoxDockLeft.Checked = true;
if ((dockAreas & DockAreas.DockRight) != 0)
checkBoxDockRight.Checked = true;
if ((dockAreas & DockAreas.DockTop) != 0)
checkBoxDockTop.Checked = true;
if ((dockAreas & DockAreas.DockTop) != 0)
checkBoxDockTop.Checked = true;
if ((dockAreas & DockAreas.DockBottom) != 0)
checkBoxDockBottom.Checked = true;
if ((dockAreas & DockAreas.Document) != 0)
checkBoxDockFill.Checked = true;
if ((dockAreas & DockAreas.Float) != 0)
checkBoxFloat.Checked = true;
}
} private DockAreasEditor.DockAreasEditorControl m_ui = null; public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
{
return UITypeEditorEditStyle.DropDown;
} public override object EditValue(ITypeDescriptorContext context, IServiceProvider sp, object value)
{
if (m_ui == null)
m_ui = new DockAreasEditor.DockAreasEditorControl(); m_ui.SetStates((DockAreas)value);            IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)sp.GetService(typeof(IWindowsFormsEditorService));
edSvc.DropDownControl(m_ui); return m_ui.DockAreas;
}
}
}