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; |
原文：http://www.cnblogs.com/briny/p/3513013.html