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Render subreport

You can display another report inside the body of a main report using the Report Viewer. The following steps helps you to customize the subreport properties such as data source, report path, and parameters.

To learn how to render a Subreport in a React app, you can watch this video:

  • Add the subreport and main reports to your application App_Data folder. In this tutorial, the already created reports are used. Refer to the Create RDL Report section or Create RDLC Report section section.

    Download the Side_By_SideMainReport.rdl and Side_By_SideSubReport.rdl reports from here. You can add the report from the Bold Reports® installation location. For more information, refer to Samples and demos. The reports used from the installed location requires the NorthwindIO_Reports.sdf database to run, so add it to your application.

  • Set the reportPath and reportServiceUrl properties of the Report Viewer as shown in following code snippet.

 function App() {
     return (<div id="viewer" style={viewerStyle}>
     <BoldReportViewerComponent id="reportviewer-container"
     reportServiceUrl = { 'https://demos.boldreports.com/services/api/ReportViewer'}
     reportPath = { 'Side_By_SideMainReport.rdl' }
     >
     </BoldReportViewerComponent>
     </div>);
   }
  • Build and run the application.

Change subreport path

To change the subreport file path, set the ReportPath property of SubReportModel in the OnInitReportOptions method.

        [NonAction]
        public void OnInitReportOptions(ReportViewerOptions reportOption)
        {
            if (reportOption.SubReportModel != null)
            {
                reportOption.SubReportModel.ReportPath = System.Web.Hosting.HostingEnvironment.MapPath(@"~/App_Data/SubReport_Detail.rdl");
            }
        }

Set subreport parameter

You can change the parameter default values of a subreport in the OnReportLoaded method of the Web API Controller as given in the following code snippet.

        [NonAction]
        public void OnReportLoaded(ReportViewerOptions reportOption)
        {
            if (reportOption.SubReportModel != null)
            {
                reportOption.SubReportModel.Parameters = new BoldReports.Web.ReportParameterInfoCollection();
                reportOption.SubReportModel.Parameters.Add(new BoldReports.Web.ReportParameterInfo()
                {
                    Name = "SalesPersonID",
                    Values = new List<string>() { "2" }
                });
            }
        }

Modify subreport data source connection string

You can change the credential and connection information of the data sources used in the subreport using the SubReportModel in the OnInitReportOptions method.

        [NonAction]
        public void OnInitReportOptions(ReportViewerOptions reportOption)
        {
            if (reportOption.SubReportModel != null)
            {
                reportOption.SubReportModel.DataSourceCredentials = new List<BoldReports.Web.DataSourceCredentials>();
                reportOption.SubReportModel.DataSourceCredentials.Add(new BoldReports.Web.DataSourceCredentials("<database>", "Data Source=<instancename>;Initial Catalog=<database>;user id=<username>;password=<password>"));
            }
        }

Set subreport data source

You can bind local business object data source collection only for RDLC reports. To specify data source of a RDLC subreport, set the ReportDataSource property in the OnReportLoaded method.

The RDL report has the connection information in report definition itself, so no need to bind the data source.

  1. Add the RDLC subreport and main reports to your application App_Data folder. You can downloaded it from here.
  2. Set the reportPath and reportServiceUrl properties of the Report Viewer as shown in following code snippet.
 function App() {
     return (<div id="viewer" style={viewerStyle}>
     <BoldReportViewerComponent id="reportviewer-container"
     reportServiceUrl = { 'https://demos.boldreports.com/services/api/ReportViewer'}
     reportPath = { 'Side_By_SideMainReport.rdl' }
     >
     </BoldReportViewerComponent>
     </div>);
   }

  • Create a class and methods that returns business object data collection. Use the following code in your application Web API Service.

    public class ProductList
{
    public string ProductName { get; set; }
    public string OrderId { get; set; }
    public double Price { get; set; }
    public string Category { get; set; }
    public string Ingredients { get; set; }
    public string ProductImage { get; set; }

    public static IList GetData()
    {
        List<ProductList> datas = new List<ProductList>();
        ProductList data = null;
        data = new ProductList()
        {
            ProductName = "Baked Chicken and Cheese",
            OrderId = "323B60",
            Price = 55,
            Category = "Non-Veg",
            Ingredients = "grilled chicken, corn and olives.",
            ProductImage = ""
        };
        datas.Add(data);
        data = new ProductList()
        {
            ProductName = "Chicken Delite",
            OrderId = "323B61",
            Price = 100,
            Category = "Non-Veg",
            Ingredients = "cheese, chicken chunks, onions & pineapple chunks.",
            ProductImage = ""
        };
        datas.Add(data);
        data = new ProductList()
        {
            ProductName = "Chicken Tikka",
            OrderId = "323B62",
            Price = 64,
            Category = "Non-Veg",
            Ingredients = "onions, grilled chicken, chicken salami & tomatoes.",
            ProductImage = ""
        };
        datas.Add(data);

        return datas;
    }
}

  • Bind the business object data values collection to subreport by adding a new item to the DataSources as shown in the following code snippet.

        [NonAction]
    public void OnReportLoaded(ReportViewerOptions reportOption)
    {
        //Assigning the data source for 'Product List.rdlc'
        if (reportOption.SubReportModel != null)
        {
            reportOption.SubReportModel.DataSources = new BoldReports.Web.ReportDataSourceCollection();
            reportOption.SubReportModel.DataSources.Add(new BoldReports.Web.ReportDataSource { Name = "list", Value = ProductList.GetData() });
        }
    }

The data source name is case sensitive, and it should be same as in the report definition.

Load subreport stream

To load subreport as stream, set the Stream property in the OnInitReportOptions method.

        [NonAction]
        public void OnInitReportOptions(ReportViewerOptions reportOption)
        {
            if (reportOption.SubReportModel != null)
            {
                // Opens the report from application App_Data folder using FileStream and loads the sub report stream.
                FileStream reportStream = new FileStream(System.Web.Hosting.HostingEnvironment.MapPath(@"~/App_Data/Product List.rdlc"), FileMode.Open, FileAccess.Read);
                reportOption.SubReportModel.Stream = reportStream;
            }
        }
        [NonAction]
        public void OnReportLoaded(ReportViewerOptions reportOption)
        {
            //Assigning the data source for 'Product List.rdlc'
            if (reportOption.SubReportModel != null)
            {
                reportOption.SubReportModel.DataSources = new BoldReports.Web.ReportDataSourceCollection();
                reportOption.SubReportModel.DataSources.Add(new BoldReports.Web.ReportDataSource { Name = "list", Value = ProductList.GetData() });
            }
        }