Re: PropertyGrid dynamic Dropdown List
- From: phcmi <phcmi@xxxxxxxxxxxxx>
- Date: Mon, 05 Feb 2007 09:47:45 -0500
Hi Nicolas and Linda,
Thank you both for your replies. Nicolas, your suggestion worked very well. This is precisely the solution we were searching for.
Linda, thanks for the added extras as well.
Phcmi
Linda Liu [MSFT] wrote:
Hi Phcmi,.
I agree to what Nicolas has suggested.
When we override the methods, such as ConvertTo, ConvertFrom, GetStandardValues and etc, in the derived TypeConverter class, we could get the object that is connected with the type descriptor request through the ITypeDescriptorContext parameter of the methods. So we could add a property for the dynamic drop down list in the myProp class and then request it later in the derived TypeConverter class.
The following is a sample. It requires that you add a PropertyGrid control on the form in advance.
using System.ComponentModel;
using System.Drawing.Design;
public partial class Form1 : Form
{
public class myProp
{
string myStr;
[TypeConverter(typeof(MyConverter))]
public string MyItem
{
get { return myStr; }
set { myStr = value; }
}
List<string> list;
[Browsable(false)]
public List<string> MyList
{
get
{
if (list == null)
{
list = new List<string>();
list.Add("aaa");
list.Add("bbb");
list.Add("ccc");
}
return list;
}
}
}
private void Form1_Load(object sender, EventArgs e)
{
myProp obj = new myProp();
this.propertyGrid1.SelectedObject = obj;
}
}
class MyConverter : TypeConverter
{ public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
{
return true;
}
public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
{
List<string> list = (context.Instance as Form1.myProp).MyList;
StandardValuesCollection cols = new StandardValuesCollection(list);
return cols;
} }
Hope this helps.
If you have any question, please feel free to let me know.
Sincerely,
Linda Liu
Microsoft Online Community Support
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- PropertyGrid dynamic Dropdown List
- From: phcmi
- RE: PropertyGrid dynamic Dropdown List
- From: Linda Liu [MSFT]
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