public DataView Dv;
protected void Page_Load(object sender, EventArgs e)
{
Dv = new Caicai.DBHelper().ExecuteDataSet("select * from News").Tables[0].DefaultView;
Dv.RowFilter = "id=2";
}

<form id="form1" runat="server">
<div>
<% = Dv[0][0].ToString() %> \ <% = Dv[0]["Title"].ToString() %> \ <% = Dv[0].Row["Content"].ToString() %> <br />
</div>
</form>

Caicai.DBHelper MyHelper = new Caicai.DBHelper();
DataSet Ds = MyHelper.ExecuteDataSet("select * from News");
DataView Dv1 = Ds.Tables[0].DefaultView;
Dv1.RowFilter = "id=1";
this.GridView1.DataSource = Dv1;
this.GridView1.DataBind();
DataView Dv2 = Ds.Tables[0].DefaultView;
Dv2.RowFilter = "id=2";
this.GridView2.DataSource = Dv2;
this.GridView2.DataBind();

DataSet Ds = new DataSet();
Ds.ReadXml(Server.MapPath(@"App_Data/XMLFile.xml"));
DataView Dv = Ds.Tables[0].DefaultView;
Dv.RowFilter = "id='11'";
Response.Write(Dv[0]["title"].ToString());

<Root>
<Catalog title="菜菜灰" id="2"/>
<Catalog title="caicaihui" id="11"/>
</Root>