How can I obtain a reference to a control created inside a repeater?

Question

I have one control named thumbviewer inside repeater. I want to set its imageurl in code. Currently it's done in aspx itself as

<asp:Repeater ID="Repeater1" runat="server" >
                    <ItemTemplate>
                        <span style="padding:2px 10px 2px 10px">

                            <bri:ThumbViewer Id="Th1"  runat="server" ImageUrl='<%# Eval("Name", "images/{0}") %>' Height="100px" Width="100px"/>
                        </span>
                    </ItemTemplate>
                </asp:Repeater>

How can i set ImageUrl in code?

Answer 1

You need to find the repeater and then look through the controls:

I do a similar thing here and load a control into a placeholder inside of a repeater..

        if (ResultRepeater != null && ResultRepeater.HasControls())
        {
            foreach (Control oControl in ResultRepeater.Controls)
            {
                if (oControl != null && oControl is RepeaterItem)
                {
                    PlaceHolder oSuggestMorePlaceholder = (PlaceHolder) oControl.FindControl("SuggestMorePlaceholder");

                    if (oSuggestMorePlaceholder != null)
                    {
                        SuggestMoreTabbedControl oTabbedControl = (SuggestMoreTabbedControl) Page.LoadControl("controls/SuggestMoreControl.ascx");
                        if (oTabbedControl != null)
                        {
                            oSuggestMorePlaceholder.Controls.Add(oTabbedControl);
                        }
                    }
                }
            }
        }

Answer 2

I would recommend you to use repeater ItemDataBound event here. Here an example of how to use it.

Answer 3

Your repeater has a onitemdatabound event.

<asp:Repeater ID="Repeater1" runat="server" onitemdatabound="Repeater1_ItemDataBound"></asp:Repeater>

In your code behind you can have an Event handler called

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    // ensure that we only look in the item template for our control
    if(  e.Item.ItemType == ListItemType.Item)
    {
         ThumbViewer tv = (ThumbViewer)e.Item.FindControl("Th1");
         tv.ImageUrl = "images/"+((<The object type you are binding>)e.Item.DataItem).Name;
    }
}

This is the most orthodox way to access data being bound to a repeater. IMHO

HTH

Answer 4

protected void rpter_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        ThumbViewControl control = e.Item.FindControl("Th1") as ThumbViewControl;
        if (control != null)
        {
           control.ImageUrl = "";
        }
    }
}

and on the aspx

<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="rpter_ItemDataBound" >
                    <ItemTemplate>
                        <span style="padding:2px 10px 2px 10px">

                            <bri:ThumbViewer Id="Th1"  runat="server" Height="100px" Width="100px"/>
                        </span>
                    </ItemTemplate>
</asp:Repeater>

Is how I would personally do it.

If you wish to get the data for it, at that point, I believe e.Item.DataItem (or something similar) get its.

Cheers,

T