fragment.ascx

东软内部材料（四）asp等相关的教学案例

<%@ Language="C#" %>
<%@ OutputCache Duration="10" VaryByControl="Category"%>

<Script runat=server>
  public void Button_Click(Object sender, EventArgs e){
    if (Category.Value == ""){
      Response.Cache.SetNoServerCaching();
      CategoryItem.InnerHtml = "Not cached...";
    }
    else
      CategoryItem.InnerHtml = "You selected: <font color=red>" + Category.Value + "</font>";
  }

  public void Page_Load(){
    // Get the Date and Time, once again this should not change after the first run       
    DateTime NowTime = DateTime.Now;
    DateTime Expires = NowTime.AddSeconds(10);

    CreatedStamp.InnerHtml = NowTime.ToString("r");
    ExpiresStamp.InnerHtml = Expires.ToString("r");
  }
</Script>

<form method="post" runat=server>
      Category:  <select id="Category" size=1 runat=server>
                  <option value=""><!--Select Category--></option>
                  <option>psychology</option>
                  <option>business</option>
                  <option value="Popular Computer">popular_comp</option>
                 </select>
            <input type=submit value="Lookup" OnServerClick="Button_Click" runat=server>
</form>

<Font size=6>
<B id=CategoryItem runat=server></B> 
<P>
Fragment Cache created: <Font color=red><B id=CreatedStamp runat=server></B></Font>
<BR>
Fragment Cache expires: <Font color=red><B id=ExpiresStamp runat=server></B></Font>
</Font>