only those properties with a certain attribute.
The code below my signature shows a simple demo of property filtering
according to the Category attribute. In this case it only shows those
proerties in the appearance category.
Well Formed this month has a more in-depth article on customizing properties
for use in the Property Grid including a dynamic filtering system. Check out
the current issue page
--
Bob Powell [MVP]
C#, System.Drawing
The October edition of Well Formed is now available.
Find out how to use DirectX in a Windows Forms control
http://www.bobpowell.net/currentissue.htm
Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/gdiplus_faq.htm
Blog
http://bobpowelldotnet.blogspot.com
--------------------------------------------------------- ---------
using System;
using System.Drawing;
using System.Drawing.Design;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Reflection;
namespace PropertyFilter
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.PropertyGrid propertyGrid1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
Filterable f=new Filterable();
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.propertyGrid1 = new System.Windows.Forms.PropertyGrid();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(8, 32);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "With";
this.button1.Click += new System.EventHandler (this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(8, 72);
this.button2.Name = "button2";
this.button2.TabIndex = 0;
this.button2.Text = "Without";
this.button2.Click += new System.EventHandler (this.button2_Click);
//
// propertyGrid1
//
this.propertyGrid1.Anchor =
((System.Windows.Forms.AnchorStyles) ((((System.Windows.Forms.AnchorStyles.To
p | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.propertyGrid1.CommandsVisibleIfAvailable = true;
this.propertyGrid1.LargeButtons = false;
this.propertyGrid1.LineColor = System.Drawing.SystemColors.ScrollBar;
this.propertyGrid1.Location = new System.Drawing.Point (160, 16);
this.propertyGrid1.Name = "propertyGrid1";
this.propertyGrid1.Size = new System.Drawing.Size(272, 240);
this.propertyGrid1.TabIndex = 1;
this.propertyGrid1.Text = "propertyGrid1";
this.propertyGrid1.ViewBackColor = System.Drawing.SystemColors.Window;
this.propertyGrid1.ViewForeColor = System.Drawing.SystemColors.WindowText;
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(440, 266);
this.Controls.Add(this.propertyGrid1);
this.Controls.Add(this.button1);
this.Controls.Add(this.button2);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
this.f.Filtered=true;
this.propertyGrid1.SelectedObject=f;
this.propertyGrid1.Refresh();
}
private void button2_Click(object sender, System.EventArgs e)
{
this.f.Filtered=false;
this.propertyGrid1.SelectedObject=f;
this.propertyGrid1.Refresh();
}
}
class Filterable : ICustomTypeDescriptor
{
bool _filtered;
public bool Filtered
{
get{return _filtered;}
set{_filtered=value;}
}
string _stringOne;
[Category("Other")]
public string StringOne
{
get{return _stringOne;}
set{_stringOne=value;}
}
string _stringTwo;
[Category("Appearance")]
public string StringTwo
{
get{return _stringTwo;}
set{_stringTwo=value;}
}
#region ICustomTypeDescriptor Members
public TypeConverter GetConverter()
{
// TODO: Add Filterable.GetConverter implementation
return TypeDescriptor.GetConverter(this,true);
}
public EventDescriptorCollection GetEvents(Attribute[] attributes)
{
// TODO: Add Filterable.GetEvents implementation
return TypeDescriptor.GetEvents(this,attributes,true);
}
EventDescriptorCollection
System.ComponentModel.ICustomTypeDescriptor.GetEvents()
{
// TODO: Add
Filterable.System.ComponentModel.ICustomTypeDescriptor.Ge tEvents
implementation
return TypeDescriptor.GetEvents(this,true);
}
public string GetComponentName()
{
// TODO: Add Filterable.GetComponentName implementation
return TypeDescriptor.GetComponentName(this,true);
}
public object GetPropertyOwner(PropertyDescriptor pd)
{
// TODO: Add Filterable.GetPropertyOwner implementation
return this;
}
public AttributeCollection GetAttributes()
{
// TODO: Add Filterable.GetAttributes implementation
return TypeDescriptor.GetAttributes(this,true);
}
public PropertyDescriptorCollection GetProperties (Attribute[] attributes)
{
// TODO: Add Filterable.GetProperties implementation
PropertyDescriptorCollection
pdc=TypeDescriptor.GetProperties(this,attributes,true);
if(_filtered)
{
PropertyDescriptorCollection pds=new PropertyDescriptorCollection(new
PropertyDescriptor[0]);
foreach(PropertyDescriptor pd in pdc)
{
Attribute a=pd.Attributes[typeof(CategoryAttribute)];
if(a!=null && ((CategoryAttribute) a).Category=="Appearance")
{
pds.Add(pd);
}
}
return pds;
}
else
return TypeDescriptor.GetProperties (this,attributes,true);
}
PropertyDescriptorCollection
System.ComponentModel.ICustomTypeDescriptor.GetProperties
()
{
// TODO: Add
Filterable.System.ComponentModel.ICustomTypeDescriptor.Ge tProperties
implementation
PropertyDescriptorCollection
pdc=TypeDescriptor.GetProperties(this,true);
if(_filtered)
{
PropertyDescriptorCollection pds=new PropertyDescriptorCollection(new
PropertyDescriptor[0]);
foreach(PropertyDescriptor pd in pdc)
{
Attribute a=pd.Attributes[typeof(CategoryAttribute)];
if(a!=null && ((CategoryAttribute) a).Category=="Appearance")
{
pds.Add(pd);
}
}
return pds;
}
else
return pdc;
}
public object GetEditor(Type editorBaseType)
{
// TODO: Add Filterable.GetEditor implementation
return TypeDescriptor.GetEditor(this, typeof (UITypeEditor), true);
}
public PropertyDescriptor GetDefaultProperty()
{
// TODO: Add Filterable.GetDefaultProperty implementation
return TypeDescriptor.GetDefaultProperty(this, true);
}
public EventDescriptor GetDefaultEvent()
{
// TODO: Add Filterable.GetDefaultEvent implementation
return TypeDescriptor.GetDefaultEvent(this,true);
}
public string GetClassName()
{
// TODO: Add Filterable.GetClassName implementation
return TypeDescriptor.GetClassName(this,true);
}
#endregion
}
}
--------------------------------------------------------- ---------
Mevar81 said:
Hi to everybody.I have a problem with the PropertyGrid
control.I want to display not all the properties of a
generic Control(Button,TextBox,ComboBox,ecc.).In general
I don't want to display only one category(Appearance,
Behavior,ecc.) but I want to chose directly which
properties to show.I've read that I can use the
SelectedObjects to put an array of object with some
properties in common with the SelectedObject,and only
properties in common for all the object will be
displayed.I've tryed to build an object with only some
properties and I've tryed to use like I've explain but it
doesn't work(it displays all the properties of the
control).Anyone has some idea to solve my problem? Thank's
to everybody
.
.
