<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

<asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand" >

<HeaderTemplate>   
  <hr/>
</HeaderTemplate>  
     
<ItemTemplate>  
<div class="nk-horizontal-divider-gray"></div>
<div  class="nk-support-faqs-tab nk-support-faqs-tab-white">
	<h2 style="padding-bottom: 12px;"><%# Eval("TitleQ")%><span class="nk-search-document-type"> - Вопросы и ответы Nokia</span>
	</h2>
	<div class="nk-support-faqs-plus"></div>
	<div style="display: block;" class="nk-faq-feedback-average">
		<div class="nk-faq-feedback-text">Средняя оценка - <%# Eval("ViewCount")%></div>
		<div style="background-position: -52px 0px;" id="nk-faq-ratings-control-FA136387_ru_RU" class="nk-faq-stars"></div>
	</div>
</div>

 <div>
     <asp:Button ID="Button1" runat="server" Text="Button" CommandName="AddProduct" CommandArgument='<%# Eval("ID") %>' />
 </div>
          
  
</ItemTemplate>  
  
<FooterTemplate>  
  <hr/>
</FooterTemplate>  
</asp:Repeater>

public void Repeater1_ItemCommand(object source, CommandEventArgs e)
        {

            Label1.Text = "Была нажата кнопка " + e.CommandArgument.ToString();

            BXFilter filter = new BXFilter();
            
            filter.Add(new BXFilterItem(BXIBlockElement.Fields.IBlock.ID, BXSqlFilterOperators.Equal, 3));
            
            filter.Add(new BXFilterItem(BXIBlockElement.Fields.ID, BXSqlFilterOperators.Equal, e.CommandArgument));
            
            BXOrderBy orderBy = new BXOrderBy();

            orderBy.Add(BXIBlockElement.Fields.Sort, BXOrderByDirection.Asc);

            BXIBlockElementCollection elementnew = BXIBlockElement.GetList(filter, orderBy);
            
            elementnew[0].PreviewText = elementnew[0].PreviewText + "11111111";
            
            elementnew[0].CustomPublicValues["VOTERS"] = (Convert.ToInt32(elementnew[0].CustomPublicValues["VOTERS"].ToString()) + 1);

            elementnew[0].Update();
            
        }

void R1_ItemCommand(Object Sender, RepeaterCommandEventArgs e) {        
          Label2.Text = "The " + ((Button)e.CommandSource).Text + " button has just been clicked; 
";
       }