生成xml
<items>
    <item   Text= "News "   NavigateUrl= "WebForm1.aspx "   DefaultSubItemLookId= "Level2Tab "   DefaultSubItemSelectedLookId= "SelectedLevel2Tab "   >
        <item   Text= "Top   Stories "   NavigateUrl= "WebForm1.aspx?page=top_stories "   />
        <item   Text= "Breaking   News "   NavigateUrl= "WebForm1.aspx?page=breaking_news "   />
        <item   Text= "World   News "   NavigateUrl= "WebForm1.aspx?page=world_news "   />
    </item>    
</items>

请问怎么生成呢??其中News,Markets,Travel,Travel2006从数据库读出,又由News读出下面的     <item   Text= "News "   NavigateUrl= "WebForm1.aspx "   DefaultSubItemLookId= "Level2Tab "   DefaultSubItemSelectedLookId= "SelectedLevel2Tab "   >
        <item   Text= "Top   Stories "   NavigateUrl= "WebForm1.aspx?page=top_stories "   />
        <item   Text= "Breaking   News "   NavigateUrl= "WebForm1.aspx?page=breaking_news "   />
        <item   Text= "World   News "   NavigateUrl= "WebForm1.aspx?page=world_news "   />
    </item>

------解决方案--------------------

DataTable dt=查询的数据;

//根据News,Markets,Travel,Travel2006条件判断循环的拼字符串

string s= " ";

for(int i=0;i <dt.Rows.Count;i++ )
{
if(dt.Rows[i][ "new "].ToString()== "new ")
{
s+= " <item> + ";
s+= " <item Text= "+News+ " ... > + ";
s+= "...+ ";
s+= "...+ ";
s+= " </item> ";
}
if(dt.Rows[i][ "Markets "]== "Markets ")
{
s+= " <item> + ";
s+= " <item Text= "+Markets+ " ... > + ";
s+= "...+ ";
s+= "...+ ";
s+= " </item> ";
}
...
...

}

//用io写xml

StreamWriter sw=new StreamWriter( Server.MapPath( " ")+ "/ "+filename+ ".xml ",false,System.Text.Encoding.GetEncoding( "GB2312 "));

sw.Write(s);

sw.Close();
------解决方案--------------------
参照select ... for xml语法。