How to modify PropertyGrid at runtime (add/remove property and dynamic types/enums)
- by salle55
How do you modify a propertygrid at runtime in every way? I want to be able to add and remove properties and add "dynamic types", what I mean with that is a type that result in a runtime generated dropdown in the propertygrid using a TypeConverter.
I have actually been able to do both those things (add/remove properties and add dynamic type) but only separately not at the same time.
To implement the support to add and remove properties at runtime I used this codeproject article and modified the code a bit to support different types (not just strings).
private System.Windows.Forms.PropertyGrid propertyGrid1;
private CustomClass myProperties = new CustomClass();
public Form1()
{
InitializeComponent();
myProperties.Add(new CustomProperty("Name", "Sven", typeof(string), false, true));
myProperties.Add(new CustomProperty("MyBool", "True", typeof(bool), false, true));
myProperties.Add(new CustomProperty("CaptionPosition", "Top", typeof(CaptionPosition), false, true));
myProperties.Add(new CustomProperty("Custom", "", typeof(StatesList), false, true)); //<-- doesn't work
}
/// <summary>
/// CustomClass (Which is binding to property grid)
/// </summary>
public class CustomClass: CollectionBase,ICustomTypeDescriptor
{
/// <summary>
/// Add CustomProperty to Collectionbase List
/// </summary>
/// <param name="Value"></param>
public void Add(CustomProperty Value)
{
base.List.Add(Value);
}
/// <summary>
/// Remove item from List
/// </summary>
/// <param name="Name"></param>
public void Remove(string Name)
{
foreach(CustomProperty prop in base.List)
{
if(prop.Name == Name)
{
base.List.Remove(prop);
return;
}
}
}
etc...
public enum CaptionPosition
{
Top,
Left
}
My complete solution can be downloaded here.
It works fine when I add strings, bools or enums, but when I try to add a "dynamic type" like StatesList it doesn't work. Does anyone know why and can help me to solve it?
public class StatesList : System.ComponentModel.StringConverter
{
private string[] _States = { "Alabama", "Alaska", "Arizona", "Arkansas" };
public override System.ComponentModel.TypeConverter.StandardValuesCollection
GetStandardValues(ITypeDescriptorContext context)
{
return new StandardValuesCollection(_States);
}
public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
{
return true;
}
public override bool GetStandardValuesExclusive(ITypeDescriptorContext context)
{
return true;
}
}
The method of using a TypeConverter works fine when you don't try to add the property at runtime, for example this code works without any problem, but I want to be able to do both.
Please take a look at my project.
Thanks!
