Hello. I am posting a question like this because I keep getting errors while using the report.

This problem only occurs on the project I am currently working on.

"An exception of type 'System.NullReferenceException' occurred in

PresentationFramework.dll but was not handled in user code Additional information

: Object reference not set to an instance of an object."

 

When creating a new project with the same reference, no error appears.

What is the problem? Leave the sauce below.

 

Telerik 2020.3.915.40 Version References(7)

Telerik.Windows.Controls Telerik.Windows.Controls.Chart Telerik.Windows.Controls.Data Telerik.Windows.Controls.GridView

Telerik.Windows.Controls.Input Telerik.Windows.Controls.Navigation Telerik.Windows.Data

 

TelerikReporting 14.2.20.916 Version References(5)

Telerik.Reporting Telerik.Reporting.OpenXmlRendering Telerik.Reporting.OpenXmlRendering Telerik.ReportViewer.Wpf Telerik.ReportViewer.Wpf.Themes

 

 

=Xaml======================================================================================

<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/SKC_QTO;component/Plugin/Themes/Report/System.Windows.xaml" />
<ResourceDictionary Source="pack://application:,,,/SKC_QTO;component/Plugin/Themes/Report/Telerik.Windows.Controls.xaml" />
<ResourceDictionary Source="pack://application:,,,/SKC_QTO;component/Plugin/Themes/Report/Telerik.Windows.Controls.Input.xaml" />
<ResourceDictionary Source="pack://application:,,,/SKC_QTO;component/Plugin/Themes/Report/Telerik.Windows.Controls.Navigation.xaml" />
<ResourceDictionary Source="pack://application:,,,/SKC_QTO;component/Plugin/Themes/Report/Telerik.ReportViewer.Wpf.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>


<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="50" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Button x:Name="ChangeReportButton" Grid.Row="0" Height="30" Width="100" Command="{Binding ThisCommand}" Content="Change Report" Margin="0,0,0,0" VerticalAlignment="Top" HorizontalAlignment="Left" >
</Button>
<tr:ReportViewer Grid.Row="1" x:Name="ReportViewer1" HorizontalAlignment="Stretch" ReportSource="{Binding MyReportSource}">
</tr:ReportViewer>

</Grid>

 

=Xaml.cs======================================================================================

    public partial class ReportingView : Window
    {
        internal const string TelerikVersion = "2020.3.915.40";
        internal const string TelerikPublicKeyToken = "~~~~~~~~~~";
        internal const string Culture = "~~~~~~";
        public ReportingView()
        {

          // This is for testing purposes. Assembly is initially registered at startup. 
            Assembly.Load($"Telerik.Windows.Controls,            Version={TelerikVersion}, Culture={Culture}, PublicKeyToken={TelerikPublicKeyToken}");
            Assembly.Load($"Telerik.Windows.Controls.Chart,      Version={TelerikVersion}, Culture={Culture}, PublicKeyToken={TelerikPublicKeyToken}");
            Assembly.Load($"Telerik.Windows.Controls.Data,       Version={TelerikVersion}, Culture={Culture}, PublicKeyToken={TelerikPublicKeyToken}");
            Assembly.Load($"Telerik.Windows.Controls.GridView,   Version={TelerikVersion}, Culture={Culture}, PublicKeyToken={TelerikPublicKeyToken}");
            Assembly.Load($"Telerik.Windows.Controls.Input,      Version={TelerikVersion}, Culture={Culture}, PublicKeyToken={TelerikPublicKeyToken}");
            Assembly.Load($"Telerik.Windows.Controls.Navigation, Version={TelerikVersion}, Culture={Culture}, PublicKeyToken={TelerikPublicKeyToken}");
            Assembly.Load($"Telerik.Windows.Data,                Version={TelerikVersion}, Culture={Culture}, PublicKeyToken={TelerikPublicKeyToken}");

            InitializeComponent();   <<<<< This Error ★★★★★★★★★★
            this.DataContext = new ViewModel();
            //DataContext = new ReportingViewModel();
        }
    }

=ViewModel.cs======================================================================================

class ViewModel : INotifyPropertyChanged
    {
        private int testCounter = 0;


        public event PropertyChangedEventHandler PropertyChanged;
        Telerik.Reporting.ReportSource _myReportSource;

        public Telerik.Reporting.ReportSource MyReportSource
        {
            get { return this._myReportSource; }
            set
            {
                if (this._myReportSource != value)
                {
                    this._myReportSource = value;
                    if (null != this.PropertyChanged)
                    {
                        this.PropertyChanged(this, new PropertyChangedEventArgs("MyReportSource"));
                    }
                }
            }
        }

        public ViewModel()
        {

            this.MyReportSource = new InstanceReportSource { ReportDocument = null };

            _thisCommand = new Telerik.Windows.Controls.DelegateCommand(x => ChangeReport());

        }

        ICommand _thisCommand;
        public ICommand ThisCommand
        {
            get
            {
                return _thisCommand;
            }
        }

        public void ChangeReport()
        {
            if (testCounter % 2 == 1)
                this.MyReportSource = new InstanceReportSource { ReportDocument = new Report1() };
            else
                this.MyReportSource = new InstanceReportSource { ReportDocument = null };
            testCounter++;
        }

============================================================================================

 

Thanks.

 

 

Currently running version R1 2020 SP1 (14.0.20.219) with the HTML 5 report viewer and the REST service ASP.NET Core 3.1

I am trying to set the database connection string dynamically using the method outlined in the knowledge base article below which passes it as a report parameter.

Change Connection String dynamically through a report parameter

 

This approach should be fine, however the issue is that I cannot find a way to modify the report parameters so that the connection string can be passed in.

 

I have tried to define a custom report resolver like the example below which adds the parameter to the report source.  But I am finding that the parameter value does not get passed into the report.

 

 

 

We are using .trdp files as our report source and I have seen some examples where people have unpacked the file to return an InstanceReportSource. By doing this it might be possible to set the parameters against the report object directly. 

Can anyone suggest a better way to set report parameters within the REST service (ie without passing the parameters from the client)?

 

 

 

 

Thanks

Andrew

 

 

Hello,

I'm currently facing a problem with Telerik Reporting menus in Visual Studio 2019.

Last week I've created some reports, all was working well.

 

Today, I had to modify some of them but report files are not displaying icons of reports but of c# code.

When right clicking on my reports I don't have designer menu anymore (View designer menu).

 

What's really strange is that on other older reports, I still have this menu available and can view the designer.

 

I havent installed VS update

I tried to reinstall Telerik reporting package on my machine

Nothing changes.

 

The fact is that there is a difference between old reports and the one I created last week that make the first ones editable and the last ones not.

Do you know where I could search to find this difference that would make me able to edit them again please ? 

 

Thanks

Regards

Hello, I am getting:

    "Unable to get report parameters.
    An error has occurred.
    Object reference not set to an instance of an object."

when trying to load a report into the HTML5 report viewer.

Code snippets below - resolve nevere gets called, but the payload of the POST looks correct.  Any ideas?

 

 

I am having a text box inside the details section of my report. Value for this text box is passed by the data source during runtime. This report is rendered as a pdf. I don't want the text box to wrap the content, so right now I am using the character count (to determine if it wraps) to show or hide the text box. I would like to know if there is a way to identify if the text inside the box is wrapped after rendered as a pdf?

I have a .net core app in which I have a Telerik report which has two parameters and I have the code like so

I keep getting the error Unable to get report parameters. Report 'Sumared.trdp' cannot be resolved. Do I have to do something with the parameters in the reportSource? I think that when you add parameters via the Telerik Report Designer, do don't add anything in the reportSource besides the report name. The Telerik Designer previews the report just fine, works like it's supposed to but when I run the app it just keeps saying this - 'Unable to get report parameters. Report Sumaren.trdp cannot be resolved'

I'm trying to show the data range selected as parameters in the header of the report. I added a text box and added {Parameters.StartDate.Value}. The problem is it shows the time and I just need the date. I tried this { Format('{0:d}',Parameters.StartDate.Value)} but it does not work. What is the proper way to accomplish my objective. Thanks in advanced. 

Hey guys,

I want to change the Tooltip-Labels (and any other labels) of the ReportViewer in my C# WPF Application.

I don't want to localize anything in my report. ust these default buttons.

Is there any way I can do this? I tried to set the Language property to de-DE but it not affected anything.

 

I would be glad about any help.

 

Greetings

Benedikt

Hi guys,

 

at the moment we are trying to figure out if we can use the Telerik Reporting to generate receipts on a thermo printer with endless paper.
We found the ContinuousPaper setting within the PageSettings but it doesn't seems to be working as expected. We are using the latest Version of Reporting (2018 R3)

When using the ContinuousPaper everything looks fine in the preview but after printing the paper gets cut after one DINA4 page. This happens when printing on the printer and when printing to a PDF file.

The only settings we have made is setting the ContinuousPaper property and adding a lot of textboxes to the report designer.

Any idea what we are doing wrong?

I've been through the docs at least twice and obviously I'm missing quite a bit.

 

Created two simple, identical, reports with the wizard. One with the report designer, Report1, the other in VS2019, Report2.  They are calling a stored procedure in SQL Server 2016, with a parameter.  Both preview in the designers just fine. Both reports have a parameter set...@batchid Int32 6000

Stored procedure:    select * from batches where batchid=@batchid

I've added the NeedDataSource event to the reports

 

The trdp complains it can't find a connection string. IDK why. There is one in the app.config file which the rest of the application happily uses. When the connection string is embedded, it still does NOT use the Uri parameter.

 

 

 

 

 

Here, an exception is thrown in the Report1_NeedDataSource event:.report.Parameters is empty.

Do you have a sample winforms app which uses either the northwind or adventure works databases?

 

TIA