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：
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：
[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：
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：
[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;
