I am getting the following exception when attempting to export a report from WPF Report Viewer to any format in the pull down list:

System.ArgumentNullException was unhandled by user code
  HResult=-2147467261
  Message=Value cannot be null.
Parameter name: format
  Source=mscorlib
  ParamName=format
  StackTrace:
       at System.String.FormatHelper(IFormatProvider provider, String format, ParamsArray args)
       at System.String.Format(String format, Object arg0)
       at Telerik.ReportViewer.Wpf.ReportViewerModel.ExportReport(String format, Hashtable deviceInfo)
       at Telerik.ReportViewer.Wpf.ReportViewerModel.set_SelectedRenderingExtension(RenderingExtension value)
  InnerException:

I'm not sure when this started. Has anyone else seen this problem?

Thanks

I have Web Forms report viewer ASPX and I'm trying to set a parameter "Parameter1" included in the designer like this:

     if (!IsPostBack)
            {
                int AppointmentID = Convert.ToInt16((string)Request.QueryString["AppointmentID"]);
                ReportLibrary.ClientApptInvoice rpt = new ReportLibrary.ClientApptInvoice();
                rpt.ReportParameters["Parameter1"].Value = AppointmentID;
            }

when I run the report viewer page I get "Missing or invalid parameter value" and the parameter field which is set visible appears to allow entry.

What am I missing ? I was trying to follow this - http://docs.telerik.com/reporting/designing-reports-parameters-programmatic-control

Thanks

Hi,

Is it possible to load data from a text file to the telerik report?

Currently we have an external source of data coming from a text file. it is already formatted the way client wants to display on their end.

What we want to do is, we load the entire data to the telerik report without doing much data formatting and layout adjustment.

Is this possible on telerik reporting by setting the datasource to the textfile?

Thanks,

I'm trying to replicate an Invoice using Telerik Reporting. The detail section contains a table that lists each order's item. It holds around 15 items per page but I need it to hold 30.

Basically I want to turn this:

Into this:

I think it can be done using a crosstab by I tried and couldn't do it. Any help is appreciated.

Hello!

I have a Silverlight application that uses Telerik reporting. Also this application uses Microsoft Prims.
After upgrading from current version of Telerik (6.0.12.215, Q1 2012 Visual Studio 2011 Refresh) to newer (11.1.17.614, R2 2017) issues occurred.
After minor changes in source code (correcting to use right namespaces) solution builds fine, even runs fine, but reports shows nothing useful (no values in parameter-binding fields). So, parameters now do not passes to reports.

This is some source code.

protected void NavigateToPermissionReport()
{
   string navigationSource = AppPages.PermissionReportView + "?" +
   string.Join("&", this.Parameters.Select(parameter => string.Format("{0}={1}", parameter.Key, parameter.Value)));
   this.EventAggregator.GetEvent<NavigateToPageEvent>().Publish(true);
   this.RegionManager.RequestNavigate(AppRegions.NavigationRegion, navigationSource);
}

After this piece of code “black magic” happen and execution comes directly to report’s code:

private void OnPermissionItemDataBinding(object sender, EventArgs e)
{   
    this.ItemDataBinding -= this.OnPermissionItemDataBinding;   
    this.BeginGetPermission(this.ReportParameters);
}

private void BeginGetPermission(ReportParameterCollection parameters){
    PermissionViewModel viewModel = new PermissionViewModel();
    viewModel.LoadData(parameters);
    this.DataSource = new ObjectDataSource(viewModel, string.Empty);
}

What happens between these parts of the code I can’t figure out.

So, before upgrading, parameters in ReportParameterCollection had the same values as in navigationSource, but after, parameters became null.

Why this can happen?

Thanks.

Hello, i have a report made with reporting Q3 2013 and VS 2012. When installing it on the client, it gives error 40: a connection with SQL could not be opened. The report in local is ok. that could be happening? other report in the same app are ok, with de same connection.

I'm using SqldAtaSource with connection defined in web.config.

Thank you

Hello,

We are trying to generate the report viewer report in javascript but are having a difficult time trying to figure out what the javascript logic should be.

When we set the report source on the control tag it works flawlessly. 

For example 

When we try to set the report source in javascript nothing happens.

Example

I have an expression like reportProcessor.RenderReport("XLS", ...) which always throws an exception with message "XLS rendering format is not available" when running in Edge.js via an Electron app, but never throws when running "normally" via a WinForms app. Same assembly, same code, but different behavior.

Stack trace for the exception:

   at Telerik.Reporting.Processing.ReportProcessor.GetExtensionInfo(String format)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessAndRender(String format, ReportSource reportSource, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)
   at Telerik.Reporting.Processing.ReportProcessor.ProcessAndRenderStateless(String format, ReportSource reportSource, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)
   at Telerik.Reporting.Processing.ReportProcessor.RenderReport(String format, ReportSource reportSource, Hashtable deviceInfo)
   at [my code]

Other details about the environment:

Telerik.Reporting.dll, version 9.2.15.930

Windows 10

Excel 2016

What kind of conditions would cause XLS rendering to be unavailable?

It's probably important to note that this same body of code has an expression like reportProcessor.RenderReport("PDF", ...) which works totally correctly with both the Edge.js-based Electron app and the WinForms app. This expression executes a few statements before the one for XLS that fails.

I checked that the app domains of both apps are running with full trust because I suspected there might be a lack of unmanaged code permissions, but that's apparently not the problem. Both domains have full trust.

I have failed to setup a project as instructed here:

https://docs.telerik.com/reporting/html5-report-viewer-asp-net-core-2

I have been over the instructions 10 times, the error message I receive is.

Error registering the viewer with the service.

An error has occurred.
The type initializer for 'Lock' threw an exception.

Project found here:

https://www.dropbox.com/s/8rl4hhanj5gbfc9/WebApplication2.zip?dl=0