"Steven Cheng[MSFT]" wrote:

> Hi Dave,
>
> Thank you for posting.
>
> As for ASP.NET control, if we want to reference and manipulate them in
> client-side script code, we should know its client-side ID in the html
> document. To get this client-side , we can use the WebControl's ClientID
> property. However, we must read it after the certain control has been added
> into its parent NamingContainer, otherwise, the ClientID doesn't represent
> the actual id that'll be writeout to client html document.  Here is a
> simple test page which demonstrate on how to use client-side script to
> reference sub controls in repeater and use script code to manipulate them:
>
> ========aspx==========
> <div>
>         <asp:Repeater ID="Repeater1" runat="server"
> OnItemDataBound="Repeater1_ItemDataBound" >
>         <ItemTemplate>
>         <br /><hr />
>         <br />
>        
>             <asp:DropDownList ID="list1" runat="server">
>             <asp:ListItem Text="Enable" Value="Enable"></asp:ListItem>
>              <asp:ListItem Text="Disable" Value="Disable"></asp:ListItem>
>             </asp:DropDownList>
>            
>            
>             <asp:DropDownList ID="list2" runat="server">
>             <asp:ListItem Text="Item1" Value="Item1"></asp:ListItem>
>             <asp:ListItem Text="Item2" Value="Item2"></asp:ListItem>
>             <asp:ListItem Text="Item3" Value="Item3"></asp:ListItem>
>             <asp:ListItem Text="Item4" Value="Item4"></asp:ListItem>
>             </asp:DropDownList>
>       
>         </ItemTemplate>
>         </asp:Repeater>
>        
>         </div>
> ============code behind===========
>
>
> public partial class Repeater_FileList : System.Web.UI.Page
> {
>     protected void Page_Load(object sender, EventArgs e)
>     {
>         if (!IsPostBack)
>         {
>             DirectoryInfo di = new
> DirectoryInfo(Server.MapPath("~/Common/"));
>             FileInfo[] pages = di.GetFiles("*.aspx");
>           
>             Repeater1.DataSource = pages;
>             Repeater1.DataBind();
>
>           
>         }
>
>         string script = @"
>         function change_list_status(list1id, list2id)
>         {
>             var list1 = document.getElementById(list1id);
>             var list2 = document.getElementById(list2id);
>            
>            
>             if(list1.selectedIndex == 0)
>             {
>                 list2.disabled = false;
>             }else
>             {
>                 list2.disabled = true;
>             }
>            
>         }
>         ";
>
>         Page.ClientScript.RegisterClientScriptBlock(this.GetType(),
> "list_function", script,true);
>
>
>     }
>
>
>    
>
>
> 
>     protected void Repeater1_ItemDataBound(object sender,
> RepeaterItemEventArgs e)
>     {
>         if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType ==
> ListItemType.AlternatingItem)
>         {
>             DropDownList list1 = e.Item.FindControl("list1") as
> DropDownList;
>             DropDownList list2 = e.Item.FindControl("list2") as
> DropDownList;
>
>
>             list1.Attributes["onchange"] = "change_list_status('" +
> list1.ClientID + "','" + list2.ClientID + "');";
>
>
>         }
>     }
> }
> ==============================
>
> Hope this helps.
>
> Regards,
>
> Steven Cheng
> Microsoft Online Community Support
>
>
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