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Answer 1

A:

You'll need to databind on every page load so you need to remove the code from within your !IsPostBack block.

When using a list or array handle the databinding event on the control. For a repeater you'll need to handle the ItemDataBound event.

This example has been modified from http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.repeater.itemdatabound.aspx:

<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;
<html  >
 <head>
    <title>OnItemDataBound Example</title>
<script language="C#" runat="server">
       void Page_Load(Object Sender, EventArgs e) {
             ArrayList values = new ArrayList();

             values.Add(new Evaluation("Razor Wiper Blades", "Good"));
             values.Add(new Evaluation("Shoe-So-Soft Softening Polish", "Poor"));
             values.Add(new Evaluation("DynaSmile Dental Fixative", "Fair"));

             Repeater1.DataSource = values;
             Repeater1.DataBind();
       }

       void R1_ItemDataBound(Object Sender, RepeaterItemEventArgs e) {

          // This event is raised for the header, the footer, separators, and items.

          // Execute the following logic for Items and Alternating Items.
          if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) {

             if (((Evaluation)e.Item.DataItem).Rating == "Good") {
                ((Label)e.Item.FindControl("RatingLabel")).Text= "<b>***Good***</b>";
             }
          }
       }    

       public class Evaluation {

          private string productid;
          private string rating;

          public Evaluation(string productid, string rating) {
             this.productid = productid;
             this.rating = rating;
          }

          public string ProductID {
             get {
                return productid;
             }
          }

          public string Rating {
             get {
                return rating;
             }
          }
       }

    </script>

 </head>
 <body>

    <h3>OnItemDataBound Example</h3>

    <form id="form1" runat="server">

       <br />
       <asp:Repeater id="Repeater1" OnItemDataBound="R1_ItemDataBound" runat="server">
          <HeaderTemplate>
             <table border="1">
                <tr>
                   <td><b>Product</b></td>
                   <td><b>Consumer Rating</b></td>
                </tr>
          </HeaderTemplate>

          <ItemTemplate>
             <tr>
                <td> <asp:Label Text='<%# DataBinder.Eval(Container.DataItem, "ProductID") %>' Runat="server"/> </td>
                <td> <asp:Label id="RatingLabel" Text='<%# DataBinder.Eval(Container.DataItem, "Rating") %>' Runat="server"/> </td>
             </tr>
          </ItemTemplate>

          <FooterTemplate>
             </table>
          </FooterTemplate>

       </asp:Repeater>
       <br />

    </form>
 </body>
 </html>

EDIT: In addition, (and you may already be aware of this) you'll need to persist your list/array somehow. You can go all the way back to the database and reconstitute the list there or you can store it in memory with cache, viewstate, or session as viable options depending on your needs.

ddc0660 2009-06-29 16:25:35

Answer 2

A:

Spring.NET Web will provide you with two-way databinding with nice, easy to maintain code. Give it a try!

Ben 2009-06-29 16:36:50

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ASP.Net and two-way data binding

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