create xml from sharepoint query?

I am querying a sharepoint list like

<where><Field Ref Name='Title'/><Value type='Text'>A</value></where>

now I am creating a webpart where I want to create xml based on this query.I don't know how to achieve this mainly I want sth开发者_Go百科 like content query webpart like getting xml from querying a list and then apply xsl on it. Can anyone tell me how it can be possible??

Thanks,

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Do you want to have the result set as XML? Then you should read these:

• explains different ways you can read XML from sharepoint http://blogs.msdn.com/kaevans/archive/2009/05/01/getting-xml-data-from-a-sharepoint-list-the-easy-way.aspx
• Lists.asmx web service explanation with examples http://msdn.microsoft.com/en-us/library/lists.lists.getlistitems.aspx
• SPWeb has GetSiteData method that returns DataTable. This can be easily translated into XML http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.getsitedata.aspx

EDIT: to turn your DataTable into XML, you can add it to a DataSet and then call GetXml, something like this:

    Dim o As New DataTable("testTable")
    o.Columns.Add("TestCol")
    o.Rows.Add(New Object() {"Testvalue1"})
    o.Rows.Add(New Object() {"Testvalue2"})

    Dim oSet As New DataSet()
    oSet.Tables.Add(o)

    MessageBox.Show(oSet.GetXml)