原来公司的一段代码，现在给朋友写的软件里也用上了，看样用处挺多，所以保存一下。
自定义属性类：
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using
System;
using
System.Collections.Generic;
using
System.Text;
using
System.Drawing.Design;
using
System.Windows.Forms.Design;
using
System.Windows.Forms;
namespace
MaoYoo.ChinaMobile.Core.PropertyGridUI
{ public
class
PropertyGridFileSelector:UITypeEditor
{
public
override
UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
{
return
UITypeEditorEditStyle.Modal;
}
public
override
object
EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object
value)
{
IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
if
(edSvc != null)
{
// 可以打开任何特定的对话框
OpenFileDialog dialog = new
OpenFileDialog
{
AddExtension = false,
Title = "打开文件",
Filter = "*.xls|*.xls|*.xlsx|*.xlsx"
};
if
(dialog.ShowDialog().Equals(DialogResult.OK))
{
return
dialog.FileName;
}
}
return
value;
}
}
} |
文件选择定义：
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[Category("文件")]
[DisplayName("数据文件")]
[Description("用户数据列表文件路径")]
[ReadOnlyAttribute(false), Browsable(true)]
[Editor(typeof(PropertyGridFileSelector), typeof(UITypeEditor))]
public
string
File
{ get;
set;
} |
操作属性的值：
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using
System;
using
System.Collections.Generic;
using
System.Text;
using
System.ComponentModel;
using
System.Reflection;
using
System.Windows.Forms;
namespace
MaoYoo.ChinaMobile.Core
{ public
class
PropertyGridHelper
{
/// <summary>
/// 设置指定PropertyGrid中已设置了SelectObject对象的属性控件中指定某个自定义特性的值
/// </summary>
/// <typeparam name="T">要设置的属性类型</typeparam>
/// <param name="grid">PropertyGrid对象</param>
/// <param name="name">要设置的属性的名称</param>
/// <param name="field">要设置的自定义特性名称</param>
/// <param name="value">要设置的自定义特性的值</param>
public
static
void
SetPropertyValue<T>(PropertyGrid grid, string
name, string
field, object
value)
{
if
(grid.SelectedObject == null)
throw
new
ArgumentException(string.Format("指定的PropertyGrid对象不包含{0}对象", "SelectObject"));
AttributeCollection attrs = TypeDescriptor.GetProperties(grid.SelectedObject)[name].Attributes;
FieldInfo fld = typeof(T).GetField(field, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.CreateInstance);
if
(fld != null) fld.SetValue(attrs[typeof(T)], value);
grid.Refresh();
}
/// <summary>
/// 设置指对象指定自定义特性或其相关特性的值
/// </summary>
/// <typeparam name="T">要设置的属性类型</typeparam>
/// <param name="graph">要设置的对象</param>
/// <param name="name">要设置的属性的名称</param>
/// <param name="field">要设置的自定义特性名称</param>
/// <param name="value">要设置的自定义特性的值</param>
public
static
void
SetPropertyValue<T>(object
graph, string
name, string
field, object
value)
{
if
(graph == null)
throw
new
ArgumentException(string.Format("指定的对象{0}不能为空", graph));
AttributeCollection attrs = TypeDescriptor.GetProperties(graph)[name].Attributes;
FieldInfo fld = typeof(T).GetField(field, BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.CreateInstance);
fld.SetValue(attrs[typeof(T)], value);
}
}
} |
设置某个属性的自定义特性：
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[Category("余额")]
[Description("是否启用余额")]
[DisplayName("余额匹配")]
[ReadOnlyAttribute(false), Browsable(true)]
public
bool
Enabled
{ get
{ return
mEnabledBalance; }
set
{
PropertyGridHelper.SetPropertyValue<ReadOnlyAttribute>(this, "Balance", "isReadOnly", !value);
mEnabledBalance = value;
}
} private
bool
mEnabledBalance = true;
|