Great!!! The interested part was:
> public class BaseDataConverter : IJavaScriptConverter
> {
> public BaseDataConverter() : base()
> {
> m_AllowInheritance = true;
Michael
On 10/5/06, dimkaspb <[EMAIL PROTECTED]> wrote:
>
> Everything appears to be working now (!!!) so I just wanted to share my
> experience in case others come across a similar issue.
>
> I have many custom objects MyDataClass1, MyDataClass2, MyDataClass3,
> etc, all of which are derived from BaseData class which adds lots of DB
> related functionality.
>
> So to be able to load my objects from DB and return them back from a
> server side Ajax method I had to do the following:
>
> 1. Create a custom converter BaseDataConverter (see code below) that
> only serializes public properties based on a certain attribute.
> 2. Update web.config jsonConverters section as follows:
> <add type="MyNamespace.BaseDataConverter,MyAssemblyName"/>
> 3. Use my data object in Ajax method:
>
> [AjaxPro.AjaxMethod()]
> public MyDataClass1 AjaxLoadMyObject(int pk)
> {
> MyDataClass1 myObj = null;
> try
> {
> myObj = new MyDataClass1();
> myObj.Load(pk);
> }
> catch (Exception ex)
> {
> // log error
> }
> return myObj;
> }
>
> It is that simple!
> Hope this helps anyone else looking at how to return your custom
> objects from ajax methods.
>
> /*** BaseDataConverter sample code **********.
>
> public class BaseDataConverter : IJavaScriptConverter
> {
> public BaseDataConverter() : base()
> {
> m_AllowInheritance = true;
>
> // list all data types that can be serialized
> m_serializableTypes = new Type[] {
> typeof(MyDataClass1),
> typeof(MyDataClass2)
> // etc...
> // or you can only leave typeof(BaseData) and
> make sure
> // that m_AllowInheritance is set to true
> // doing that will obviously be slower though
> !!!
> };
> }
>
> public override string Serialize(object o)
> {
> StringBuilder sb = new StringBuilder();
> Serialize(o, sb);
> return sb.ToString();
> }
>
> public override void Serialize(object o, StringBuilder sb)
> {
> bool b = true;
> Type type = o.GetType();
>
> sb.Append('{');
> sb.Append("\"__type\":");
> JavaScriptUtil.QuoteString(type.AssemblyQualifiedName, sb);
> b = false;
>
> // find members
> MemberFilter memberFilter = new
> MemberFilter(BaseDataConverter.FilterFindMembers);
> MemberInfo[] members = type.FindMembers(MemberTypes.Property,
> BindingFlags.Instance | BindingFlags.Public, memberFilter, null);
> string[] mappedMembers = new string[members.Length];
> for (int i = 0; i < mappedMembers.Length; i++)
> {
> mappedMembers[i] = members[i].Name;
> }
>
> // get values
> foreach (string mappedMember in mappedMembers)
> {
> if(!b) sb.Append(",");
> JavaScriptUtil.QuoteString(mappedMember, sb);
> sb.Append(':');
>
> JavaScriptSerializer.Serialize(type.GetProperty(mappedMember).GetValue(o,
> null), sb);
> }
>
> sb.Append('}');
> }
>
> private static bool FilterFindMembers(MemberInfo mi, Object search)
> {
> object[] attribs =
> mi.GetCustomAttributes(typeof(ControlTypeAttribute), true);
>
> if (attribs != null)
> if (attribs.Length > 0)
> return true;
>
> return false;
> }
>
> }
>
> -- Dima.
>
>
> >
>
--
Best regards | Schöne Grüße
Michael
Microsoft MVP - Most Valuable Professional
Microsoft MCAD - Certified Application Developer
http://weblogs.asp.net/mschwarz/
http://www.schwarz-interactive.de/
Skype: callto:schwarz-interactive
MSN IM: [EMAIL PROTECTED]
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