Problem:
find value in repeater

Solution:
write this code in itemdatabound on your repeater:

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            Label title = e.Item.FindControl("Label1") as Label; // depend on what component you r searching for


          Response.Write(title.Text);   // just check          
        }
    }