Hi Msdn,

I am having one class and their properties Backcolor ,Forecoolor,etc

at runtime depending on one condition i want to make the backcolor property to false and should not be shown to user

THis is code i am having but it is readOnly . How can i make to Browsable atttribute to False.

  Dim property_descriptors As _
        PropertyDescriptorCollection = _
        TypeDescriptor.GetProperties(GetType(cCustomControlProperties))

                            Dim attributes As AttributeCollection = _
          property_descriptors("BackColor").Attributes
                            Dim browsable_attribute As BrowsableAttribute
                            browsable_attribute = _
                                CType(attributes(GetType(BrowsableAttribute)), _
                                    BrowsableAttribute)
----------------------------------------------------------------
   browsable_attribute.Browsable = False
----------------------------------------------------------------

                        End If
                    Next
Regards ,

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VS

Hi SilverPlate,

You can implement a custom type converter for your class to hide or show the BackColor property in the Properties window. The following is a sample:

class MyTypeConverter : TypeConverter
{
public override bool GetPropertiesSupported(ITypeDescriptorContext context)
{
return true;
}
public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes)
{

PropertyDescriptorCollection pdc = TypeDescriptor.GetProperties(typeof(cCustomControlProperties),attributes);
if (pdc["conditionPropertyName"].GetValue(value).Equals(false))
{
PropertyDescriptor[] newpdcArray = new PropertyDescriptor[pdc.Count - 1];
int i = 0;
foreach (PropertyDescriptor pd in pdc)
{
if (!pd.Name.Equals("BackColor"))
{
newpdcArray[i++] = pd;
}
}
PropertyDescriptorCollection newpdc = new PropertyDescriptorCollection(newpdcArray);
return newpdc;
}
else
{
return pdc;
}
}
public override bool GetCreateInstanceSupported(ITypeDescriptorContext context)
{
// always force a new instance
return true;
}
public override object CreateInstance(ITypeDescriptorContext context, System.Collections.IDictionary propertyValues)
{
cCustomControlProperties newobj = new cCustomControlProperties();
newobj.Property1 = propertyValues["Property1"] as string;
newobj.Property2 =(bool)propertyValues["Property2"];
....
return newobj;
}
}

Hope this helps.
If you have anything unclear, please feel free to let me know.

Sincerely,
Linda Liu

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Hi Linda ,

Thanks For Replying .

Actually i am having a list of controls in multiple Controls selections like Picturebox,Textbox ,Label,LinkLabel etc .

Now i got Picturebox in the Multiple selection of control .

In cCustomProperties Class i am having FORECOLOR ,BACKCOLOR ,FONT ,SIZE , LOCATION
Common Properties class all the controls to show for multiple controls if selected in the propertygrid.

Case :: 1
If i get the PICTUREBOX in the List Of Multiple Controls i want to hide the FONT,FORECOLOR,BACKCOLOR Properties and to show only LOCATION,SIZE PROPERTIES .

Case :: 2
For LINKLABEL i am fixing the size of the Linklabel to 7,7 and label text as * .So if i get the linkLabel in the list of Multiple controls i want to hide the SIZE ,FORECOLOR,BACKCOLOR PROPERTIES



Presently i am taking different class for all these conditions and doing Permutations & Combinations . Which is Risky THING TO DO THE THINGS . I want to Stop doing all these non-Sense things .

I want to implement the way in visual studio if Multiple Controls are selected . In the PropertyGrid i get only the properties which are common to all the controls .

Ex :: Consider the label and Picturebox in Multiple Selection. THE FONT PROPETY is hiding . IN THIS WAY DYNAMICALLY .


Regards

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VS