problems with ObjectDataSourc e and filtering

[ber.janssens]

Hi,

I am trying the new ObjectDataSourc e from ASP.NET 2.0. I connected a
Gridview with ObjectDataSourc e which is connected to a webservice which
returns a DataSet. In the Webmethod I return only the rows for the
current page because paging is enabled, I use the parameters
maximumRows and startRowIndex for doing this. I also got sorting to
work using the parameter sortExpression.

The method of the webservice looks like this:

[WebMethod(Descr iption = "")]
public DataSet GetDataSet(int maximumRows, int startRowIndex, string
sortExpression)
{
....

return dsPagedPortCode s;
}

[WebMethod(Descr iption = "")]
public int GetNumberOfRows ()
{
....

return ds.Tables[0].Rows.Count;
}

The description of the ObjectDataSourc e looks like this:

<asp:ObjectData Source
ID="ods" runat="server" MaximumRowsPara meterName="maxi mumRows"
StartRowIndexPa rameterName="st artRowIndex"
SortParameterNa me="sortExpress ion"
EnablePaging="T rue" SelectMethod="G etDataSet"
SelectCountMeth od="GetNumberOf Rows"
TypeName="WSSer vice.wsWebservi ce"
</asp:ObjectDataS ource>

Paging and sorting works but now I want to be able to get filtering
works, the returned DataSet contains one table with 4 columns and I
want to be able to filter on each column.

What do I have to change to the webmethod and the ObjectDataSourc e to
get filtering to work?

Thanks a lot,
kind regards,
Bert Janssens