Hello ,

I have tried to do example "http://demos.devexpress.com/ASPxperienceDemos/NewsControl/DataBinding.aspx".

There are few problems that I cannot overcome.

1 ) In function OnTailClick : method for ASPxCallBack -PerformCallback did not run. I used SendCallback.

2) In function  OnTailClick : news ID is empty - I think it is because of XML file: NewsControlRSS.xml. That's why the rest of callback method does not work , so  e.Parameter is empty and ASPxCallback1_Callback does not work properly. Can I see the full code for this example?? OR is it a bug??

Hi Karol,

Since version 8.2 the SendCallback method of the ASPxClientCallback class has become
obsolete. The new PerformCallback method with the same signature is now in use.

> In function OnTailClick : news ID is empty...

Works fine for me.

Thanks for reply. I am using 8.1 version. Please look into sample code which I have done. Please point where I am doing something wrong.

Because I have empty Popup when clicking on News details .

////////////////////////////Firstly ".cs" file////////////////////////////////////////////////////////////////////

public partial class _Default : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {  
  Page.ClientScript.RegisterClientScriptInclude("MyScript", "JScript.js");

  if (IsCallback)
  System.Threading.Thread.Sleep(50); // Intentionally pauses server-side processing, to demonstrate the Loading Panel functionality.
   
  }
  protected void ASPxCallback1_Callback(object source, DevExpress.Web.ASPxCallback.CallbackEventArgs e)
  {
  string s= e.Parameter;
  int newsID = int.Parse(e.Parameter);
  IHierarchicalDataSource dataSource = XmlDataSource1 as IHierarchicalDataSource;
  HierarchicalDataSourceView view = dataSource.GetHierarchicalView("");
  IHierarchicalEnumerable enumerable = view.Select();
  int index = 1;
  string text = "";
 
  foreach(object obj in enumerable) {
  if(newsID == index) {
  IHierarchyData data = enumerable.GetHierarchyData(obj);
  PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(data);
  PropertyDescriptor descriptor = properties.Find("description", true);
  text = descriptor.GetValue(obj).ToString();
  }
  index++;
  }

  e.Result = text;
  }
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

/////////////////////////////////////////////////part of "aspx"  file//////////////////////////////////////////////////////////////////////

  <table class="style1">
  <tr>
  <td>
  <dxnc:ASPxNewsControl ID="ASPxNewsControl1" runat="server" NavigateUrlFormatString="BLOCKED SCRIPTvoid('{0}');"
  DataSourceID="XmlDataSource1" Width="400px"
  CssFilePath="~/App_Themes/Youthful/{0}/styles.css" CssPostfix="Youthful"
  ImageFolder="~/App_Themes/Youthful/{0}/" LoadingPanelImagePosition="Bottom">
  <LoadingPanelStyle ImageSpacing="3px">
  </LoadingPanelStyle>
  <LoadingPanelImage Url="~/App_Themes/Youthful/Web/tcLoading.gif" />
  <ItemDateStyle Spacing="10px">
  </ItemDateStyle>
  <Items>
  <dxnc:NewsItem Date="11/13/2008 15:36:12" HeaderText="asdfasd asdfa asd "
  Text="asdfasdf asdf asdf asdf adsf asdf asdf asdf ">
  </dxnc:NewsItem>
  <dxnc:NewsItem Date="2008-11-14" HeaderText="asdf asdf"
  Text="asdfa asdf asdf asdf ">
  </dxnc:NewsItem>
  </Items>
  <ItemSettings DateHorizontalPosition="OutsideLeft"
  TailPosition="KeepWithLastWord" MaxLength="120" ShowImageAsLink="True">
  <TailImage Align="Bottom" Height="11px"
  Url="~/App_Themes/Youthful/Web/hlTailImage.png" Width="16px" />
  </ItemSettings>
  <ItemRightPanelStyle Spacing="7px">
  </ItemRightPanelStyle>
  <ItemLeftPanelStyle Spacing="7px">
  </ItemLeftPanelStyle>
  <ItemHeaderStyle Spacing="2px">
  </ItemHeaderStyle>
  <ClientSideEvents TailClick="function(s, e) {
OnTailClick(e.name, e.htmlElement);
}" BeginCallback="function(s, e) {
 OnNewsControlBeginCallback();
}" />
  <PagerSettings>
  <AllButton>
  <Image Height="15px" Width="21px" />
  </AllButton>
  <FirstPageButton Text="">
  <Image Height="15px" Width="21px" />
  </FirstPageButton>
  <LastPageButton ImagePosition="Left" Text="">
  <Image Height="15px" Width="21px" />
  </LastPageButton>
  <NextPageButton Text="">
  <Image Height="15px" Width="16px" />
  </NextPageButton>
  <PrevPageButton Text="">
  <Image Height="15px" Width="16px" />
  </PrevPageButton>
  <Summary AllPagesText="" Text="" />
  </PagerSettings>
  </dxnc:ASPxNewsControl>
  <asp:XmlDataSource ID="XmlDataSource1" runat="server"
  DataFile="~/App_Data/NewsControlRSS.xml"
  TransformFile="~/App_Data/NewsControlRSS.xslt"></asp:XmlDataSource>
  <dxcb:ASPxCallback ID="ASPxCallback1" runat="server" ClientInstanceName="NewsCallback1"
  oncallback="ASPxCallback1_Callback" style="margin-bottom: 0px">
  <ClientSideEvents CallbackComplete="function(s, e) {
 OnCallbackComplete(e.result);
}" />
  </dxcb:ASPxCallback>
  </td>
  <td>
  <dxpc:ASPxPopupControl PopupAction="None" ClientInstanceName="ASPxPopupClientControl1" PopupHorizontalAlign="OutsideRight" EnableViewState="False" ID="ASPxPopupControl1" runat="server" PopupHorizontalOffset="5" AllowDragging="True" EnableAnimation="False" PopupVerticalAlign="TopSides" CloseAction="CloseButton" HeaderText="Details">
  <ContentCollection>
<dxpc:PopupControlContentControl runat="server"></dxpc:PopupControlContentControl>
</ContentCollection>
  </dxpc:ASPxPopupControl>
  </td>
  </tr>
  </table>
 

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Javascript file is the same as in the example.

I have seen into the code in the example .

Above there is code copied from tutorial.  Everything is the same , but I do not have answer form server. Callback is done but I cannot see the reply. I debugged the code , but it does not work properly - newsID is empty!!!

I cannot also use Demos?? I cannot run or compile  ASP demos . WHY??

Hello ,

I have tried to do example "http://demos.devexpress.com/ASPxperienceDemos/NewsControl/DataBinding.aspx".

I have two problems.

First: I have copied code into my sample web site. When I am clicking 'details' . Popup shows with 'Loading ...',but I have no callback reply. When I looked into the code newsID is empty, so how can server identify the part of database to read??

Second: I cannot run ASP demos. When I am clicking on them in Demo Center I have in 'HTTP 500.19 — Internal Server Error'.   When I was tring to run see them in visual studio it is written 'Unable to open the web [...] Internal Server Error'. I am using Vista Business