Error to display a detail view with a CompoundKeyStruct and TypeConverter.

Hi Rossano.
17.1.4+
You can use the StructTypeConverter<T>  for struct key properties to enable some built-in DevExpress.Web.ASPxGridView functions(e.g., inplace editing and the selection column).
Older versions
The following type converter seems to solve the issue:

C#
public class CKDomainObject1Converter : TypeConverter {  
    public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {  
        if (sourceType == typeof(string)) return true;  
        if (sourceType == typeof(DevExpress.Xpo.Helpers.IdList)) return true;  
        return base.CanConvertFrom(context, sourceType);  
    }  
    public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {  
        if (value is string) {  
            string[] v = ((string)value).Split(new char[] { ',' });  
            return new DomainObject1.CompoundKey1Struct { Key1 = Convert.ToInt32(v[0]), Key2 = Convert.ToInt32(v[1]), Key3 = Convert.ToInt32(v[2]) };  
        }  
        if (value is DevExpress.Xpo.Helpers.IdList) {  
            DevExpress.Xpo.Helpers.IdList v = (DevExpress.Xpo.Helpers.IdList)value;  
            return new DomainObject1.CompoundKey1Struct { Key1 = Convert.ToInt32(v[0]), Key2 = Convert.ToInt32(v[1]), Key3 = Convert.ToInt32(v[2]) };  
        }  
        return base.ConvertFrom(context, culture, value);  
    }  
    public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {  
        if (destinationType == typeof(string))  
            return ((DomainObject1.CompoundKey1Struct)value).Key1 + "," + ((DomainObject1.CompoundKey1Struct)value).Key2 + "," + ((DomainObject1.CompoundKey1Struct)value).Key3;  
        return base.ConvertTo(context, culture, value, destinationType);  
    }  
}