Code sample of using ListViewWebPart

Application Page:

<asp:Content ID="Main" ContentPlaceHolderID="PlaceHolderMain" runat="server">
   <asp:UpdatePanel ID="panelLV" runat="server" UpdateMode="Conditional"></asp:UpdatePanel>
</asp:Content>

Code behind:

protected void Page_Load(object sender, EventArgs e)
{
   if (!IsPostBack)
   { 

      createLVWP();
   }
}

private void createLVWP()
{

   SPWeb web = SPContext.Current.Web;
   SPList list = web.GetList(
         SPUrlUtility.CombineUrl(web.ServerRelativeUrl, myListUrl));

   lvwp = new ListViewWebPart();
   lvwp.ListName = list.ID.ToString("B").ToUpper();
   lvwp.ViewGuid = list.DefaultView.ID.ToString("B").ToUpper();
   lvwp.ChromeType = PartChromeType.None;
   

   filterLVWP();
   this.panelLV.ContentTemplateContainer.Controls.Add(lvwp);
}

private void filterLVWP()
{
   string query = string.Format(
@"<Contains>
<FieldRef Name='myFieldName' /><Value Type='Text'>{0}</Value>
</Contains>", myFieldValue);

   XmlDocument doc = new XmlDocument();
   doc.LoadXml(lvwp.ListViewXml);
   XmlNode queryNode = doc.SelectSingleNode("//Query");
   XmlNode whereNode = queryNode.SelectSingleNode("Where");

   if (whereNode != null)
      queryNode.RemoveChild(whereNode);

   XmlNode newNode = doc.CreateNode(XmlNodeType.Element, "Where", String.Empty);
   newNode.InnerXml = query.ToString();
   queryNode.AppendChild(newNode);
   lvwp.ListViewXml = doc.OuterXml;
}