Dynamic ExternalStyleSheet from Stream or URI

[henry]

What Im trying to achieve is to load a dynamic externalstylesheet, where in the style rules can be configurable.

Unfortunately, I can not make this to work. Im getting the following error:

An error has occurred while processing Report 'MyReport':
For security reasons DTD is prohibited in this XML document. To enable DTD processing set the DtdProcessing

I also tried to use stream buy the errors says the buffer can not be null even though Im passing the right byte array.

Here are the codes:

public MyReport(Uri stylesheet): this()
{
   this.ExternalStyleSheets.Clear();
   this.ExternalStyleSheets.Add(new ExternalStyleSheet(stylesheet));
}

ReportController

public ActionResult MyReport()
{
   var xml = new Uri("http://mydomain.com" + Url.Action("ReportStyleSheet", "Theme"));
   var report = new MyReport(xml);
   return ReportViewer(report);
}

private ViewResult ReportViewer(Report report)
{
   return View("ReportViewer", report);
}

ThemeController

public ActionResult ReportStyleSheet()
{
   var xml = string.Empty;

   if (this.Request.IsAuthenticated)
   {
    //replaceDictionary replaces the color schemes
    xml = template.BuildTemplate("ReportStyleSheet.xml", replaceDictionary);
   }

   return Content(xml, "application/xml");

}

ReportViewer.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Telerik.Reporting.Report>" %>

<%@ Register assembly="Telerik.Reporting, Version=7.0.13.521, Culture=neutral, PublicKeyToken=a9d7983dfcc261be" namespace="Telerik.Reporting" tagprefix="telerik" %>

<%@ Register assembly="Telerik.ReportViewer.WebForms, Version=7.0.13.521, Culture=neutral, PublicKeyToken=a9d7983dfcc261be" namespace="Telerik.ReportViewer.WebForms" tagprefix="telerik" %>

<telerik:ReportViewer ID="ReportViewer1" style="height: 700px; width: 100%; margin-bottom: 30px;" runat="server"></telerik:ReportViewer>

<script runat="server">

public override void VerifyRenderingInServerForm(Control control)
{
   // to avoid the server form (<form runat="server"> requirement
}

protected override void OnLoad(EventArgs e)
{
   base.OnLoad(e);
   try
   {
      var instanceReportSource = new InstanceReportSource();

      instanceReportSource.ReportDocument = Model;
      ReportViewer1.ReportSource = instanceReportSource;
   }
   catch (Exception ex)
   {
      Response.Write(ex.Message);
   }
}

</script>

[KS]

Hi,

According tho this - http://social.msdn.microsoft.com/Forums/sqlserver/en-US/1be6ab1c-7c89-4dc5-8474-f7d0770431f0/for-security-reasons-dtd-is-prohibited-in-this-xml-document-to-enable-dtd-processing-set-the?forum=sqlreportingservices
a security setting or memory problem. I bet on the first.

-KS

[henry]

Any response from Telerik about this issue?

[Stef]

Hi Henry,

The issue is not reproducible with the described settings.

Please double-check your security settings and the permissions of the user. Also note that the external style sheets can be added to the report in the controller directly, instead of using parameterized constructor for the report.

As of Q3 2013 we introduced a new viewer that may suit better your MVC project. For more details check the following articles:

• HTML5 Report Viewer
• HTML5 Report Viewer ASP.NET MVC Extension
• Telerik Reporting REST Service

I hope this information points you into the right direction.

Regards,
Stef
Telerik