RadListView and PostBack

[Fabio Cirillo]

Hi,
i would that when i push the radbutton into radlistview, the postback must not start.

I load a list of generic in radlistview datasource from page_load with this code:

Private Sub Carica_risultati(ByVal _str1 As String, ByVal _str2 As String)
    Dim lista As List(Of PropertyUtente) = Loadsearch.Search(_str1, _str2)
    RadListView1.DataSource = lista
    RadListView1.DataBind()
End Sub

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim _str1, _str2 As String
    _str1 = Request.QueryString("_str1")
    _str2 = Request.QueryString("_str2")
    Carica_risultati(_str1, _str2)
    Me.ClientScript.RegisterStartupScript(Me.GetType, "", "Height_Div();", True)
End Sub

so i would that when start this code:

Protected Sub RadButton1_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim Button As RadButton = CType(sender, RadButton)
    Dim item As RadListViewDataItem = CType(Button.Parent, RadListViewDataItem)
    Response.Redirect("Card.aspx?_id=" & item.GetDataKeyValue("idutente"))
End Sub

I do not want to run the code again in page_load, Is possible?

Under there is asp code too

<telerik:RadListView ID="RadListView1" runat="server"  DataKeyNames="idutente"
                   ItemPlaceholderID="Contenitore" AllowPaging="True" Skin="Simple">
                   <LayoutTemplate>
                       <fieldset id="FieldSet1">
                           <legend>Risultati della ricerca:</legend>
                           <asp:PlaceHolder ID="Contenitore" runat="server"></asp:PlaceHolder>
                           <div style="clear: both">
                           </div>
                           <div>
                               <div style="float: left; margin-left: 30%;">
                               <telerik:RadButton ID="btnFirst" runat="server" Text="Prima" CommandName="Page" CommandArgument="First"
                               Enabled="<%#Container.CurrentPageIndex > 0 %>" Skin="Sunset">
                               </telerik:RadButton>
                               <telerik:RadButton ID="btnPrev" runat="server" Text="Precedente" CommandName="Page" CommandArgument="Prev"
                               Enabled="<%#Container.CurrentPageIndex > 0 %>" Skin="Sunset">
                               </telerik:RadButton>
                                   <span style="vertical-align: top; position: relative; top: 4px">Pagina
                                       <%#Container.CurrentPageIndex + 1 %>
                                       di
                                       <%#Container.PageCount %></span>
                               <telerik:RadButton ID="btnNext" runat="server" Text="Successiva" CommandName="Page" CommandArgument="Next"
                               Enabled="<%#Container.CurrentPageIndex + 1 < Container.PageCount %>" Skin="Sunset">
                               </telerik:RadButton>
                               <telerik:RadButton ID="btnLast" runat="server" Text="Ultima" CommandName="Page" CommandArgument="Last"
                               Enabled="<%#Container.CurrentPageIndex + 1 < Container.PageCount %>" Skin="Sunset">
                               </telerik:RadButton>
                               </div>
                           </div>
                       </fieldset>
                   </LayoutTemplate>
                   <ItemTemplate>
                       <fieldset style="float: left; width: 494px; height: 180px">
                           <legend>Categoria:
                               <%# CType(Container.DataItem, PropertyUtente).Desccategoria%>
                           </legend>
                           <table cellpadding="0" cellspacing="0" width="95%">
                               <tr>
                                   <td style="width: 80%;">
                                       <table cellpadding="5" cellspacing="0">
                                           <tr>
                                               <td style="width: 20%;">
                                                   Nome:
                                               </td>
                                               <td style="width: 80%; text-align:left; color:#D5842B">
                                                   <%# CType(Container.DataItem, PropertyUtente).utente%>
                                               </td>
                                           </tr>
                                           <tr>
                                               <td style="width: 20%;">
                                                   Città:
                                               </td>
                                               <td style="width: 80%; text-align:left">
                                                   <%# CType(Container.DataItem, PropertyUtente).Desccomune%>
                                               </td>
                                           </tr>
                                           <tr>
                                               <td style="width: 20%;">
                                                   Telefono:
                                               </td>
                                               <td style="width: 80%; text-align:left">
                                                   <%# CType(Container.DataItem, PropertyUtente).Telefono%>
                                               </td>
                                           </tr>
                                           <tr>
                                               <td style="width: 20%;">
                                                   Cellulare:
                                               </td>
                                               <td style="width: 80%; text-align:left">
                                                   <%# CType(Container.DataItem, PropertyUtente).Cellulare%>
                                               </td>
                                           </tr>
                                           <tr>
                                               <td style="width: 20%;">
                                                   Email:
                                               </td>
                                               <td style="width: 80%; text-align:left">
                                                   <%# CType(Container.DataItem, PropertyUtente).Email%>
                                               </td>
                                           </tr>
                                           <tr>
                                               <td>
                                               </td>
                                               <td style="width: 100%; text-align:center">
                                                   <telerik:RadButton ID="RadButton1" runat="server" Text="Visualizza biglietto" Skin="Sunset"
                                                    OnClick="RadButton1_Click">
                                                   </telerik:RadButton>
                                               </td>
                                           </tr>
                                       </table>
                                   </td>
                                    <td style="vertical-align: top; text-align: right; width: 100px;">
                                       <asp:Image ID="Image1" runat="server" ImageUrl='<%# CType(Container.DataItem, PropertyUtente).imageprofile%>' Height="125px" Width="110px"/>
                                   </td>
                               </tr>
                           </table>
                       </fieldset>
                   </ItemTemplate>
               </telerik:RadListView>

[Andrey]

Hello,

There are couple of ways to achieve your goal:

• You could either enclose the code from the Page_Load event in if(!PostBack) statement and thus the code will be executed only on initial page load but not on subsequent postbacks.
• Another option is to set some Session variable in the Click event of the button and then check in the Page_Load event for its value. If the value for example is false you will execute the code, if it is true you will.

All the best,
Andrey
the Telerik team