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Editorial Team
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Asked: 2026-05-24T02:46:04+00:00

How to access the ‘HyperlinkID1’ control with the headertemplate? I like to change the

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How to access the ‘HyperlinkID1’ control with the headertemplate?
I like to change the value like below but i can’t access the control because it keep telling that “The name ‘HyperlinkID1’ does not exist in the current context”

if (!IsPostBack)
{
     HyperlinkID1.ImageUrl = "asc.jpg";//change image
}
else
{
     HyperlinkID1.ImageUrl = "asc.jpg";//change image
}

    <%@ Page Language="C#" %>

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <title></title>
    </head>
    <script language="C#" runat="server">
        public class PositionData
        {
            private string name;
            private string ticker;
            public PositionData(string name, string ticker)
            {
                this.name = name;
                this.ticker = ticker;
            }
            public string Name
            {
                get
                {
                    return name;
                }
            }
            public string Ticker
            {
                get
                {
                    return ticker;
                }
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {

            if (!IsPostBack)
            {
                HyperlinkID1.ImageUrl = "asc.jpg";//change image

            }
            else
            {
                HyperlinkID1.ImageUrl = "asc.jpg";//change image
            }


            if (!IsPostBack)
            {
                ArrayList values = new ArrayList();

                values.Add(new PositionData("Microsoft", "Msft"));
                values.Add(new PositionData("Intel", "Intc"));
                values.Add(new PositionData("Dell", "Dell"));

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


            }
        }
    </script>
    <body>
        <form runat="server">
        <b>Repeater1:</b>
        <asp:Repeater ID="Repeater1" runat="server">
            <HeaderTemplate>
                <table border="1">
                    <tr>
                        <td><b>Company</b>
                            <asp:HyperLink ID="HyperlinkID1" runat="server" ImageUrl="desc.jpg" NavigateUrl="nextpage.aspx">HyperLink</asp:HyperLink></td>
                        <td><b>Symbol</b></td>
                    </tr>
            </HeaderTemplate>
            <ItemTemplate>
                <tr>
                    <td><%# DataBinder.Eval(Container.DataItem, "Name") %> </td>
                    <td><%# DataBinder.Eval(Container.DataItem, "Ticker") %> </td>
                </tr>
            </ItemTemplate>
            <FooterTemplate>
                </table>
            </FooterTemplate>
        </asp:Repeater>
        </form>
    </body>
    </html>
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1 Answer

  1. Editorial Team

    The control does not exist. You need to declare an OnItemCreated method linked to your repeater, and in this do a FindControl for the control name, and set the value in this.

    ETA – in response to the comment.

    <asp:Repeater OnItemCreated="rptItemCreated" >

.
.
.

    And in the code you need to define the new method defined:

    protected void rptItemCreated(Object Sender, RepeaterItemEventArgs e)
{

    if(e.Item.ItemType==ListItemType.Header)
    {
        HtmlAnchor HyperLinkID1=(HtmlAnchor)e.Item.FindControl("HyperLinkID1");
        HyperlinkID1.ImageUrl = IsPostBack?"asc.jpg":"asc.jpg;
    }
}

    Note this is typed from memory, and so may need some tweaking. Also I have put the code you had into an abreviated form, which is equivalent but briefer to format.

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