改变 PropertyGrid 控件的编辑风格（3）——打开对话框
张昱e-zhangyu@vip.sina.com
效果：
适用场合：
1、 打开文件、打印设置等通用对话框
2、 打开特定的对话框
步骤一：定义从UITypeEditor 派生的类，以 OpenFileDialog 对话框为例，示例代码如下：
using System;
using System.Windows.Forms;
using System.Drawing.Design;
using System.Windows.Forms.Design;
namespace blog.csdn.net.zhangyuk
{
/// <summary>
/// IMSOpenFileInPropertyGrid 的摘要说明。
/// </summary>
public class PropertyGridFileItem : UITypeEditor
{
public override UITypeEditorEditStyle GetEditStyle(
System.ComponentModel.ITypeDescriptorContext context)
{
return UITypeEditorEditStyle.Modal;
}
public override object EditValue(
System.ComponentModel.ITypeDescriptorContext context,
System.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();
dialog.AddExtension = false;
if( dialog.ShowDialog().Equals(DialogResult.OK) )
{
return dialog.FileName;
}
}
return value;
}
}
}
步骤二：编辑属性类，指定编辑属性。示例如下：
namespace blog.csdn.net.zhangyuk
{
public class SomeProperties
{
private string _finished_time = "";
……
// 文件
string _fileName = "";
[
Description("文件打开对话框"),
Category("属性"),
EditorAttribute(typeof(PropertyGridFileItem),
typeof(System.Drawing.Design.UITypeEditor))
]
public String 文件
{
get { return _fileName; }
set { _fileName = value;}
}
……
}
}
步骤三：设置PropertyGrid的属性对象。示例如下：
private void Form1_Load(object sender, System.EventArgs e)
{
this.propertyGrid1.SelectedObject = new SomeProperties();
}
