Render subreport

To render a subreport in the Bold Reports^® ASP.NET Web Forms Report Viewer, add the main report and subreport to your application and load them through the Web API controller. A subreport displays another report inside the body of the main report. The following steps help you customize the subreport properties such as data source, report path, and parameters.

1. Add the sub report and main reports to the application Resources folder. In this tutorial, the already created reports are used. Refer to the Create RDL Report or Create RDLC Report section.

   Download the side-by-side-main-report.rdl, side-by-side-sub-report.rdl reports from the Subreports download. You can add a report from the Syncfusion^® installation location. For more information, refer to Samples and demos.

• Set the ReportPath and ReportServiceUrl properties of the Report Viewer as in the following code snippet:

  The following code example demonstrates how to load a subreport in the Report Viewer at client side.

  <div style="height: 650px;width: 950px;min-height:404px;">
      <Bold:ReportViewer runat="server" ID="viewer"
          ReportServiceUrl="/api/ReportViewer">
          ReportPath="~/Resources/side-by-side-main-report.rdl"
      </Bold:ReportViewer>
  </div>

How do I change the subreport path?

To change the subreport file path in the Report Viewer, set the Stream property of SubReportModel in the OnInitReportOptions method.

[NonAction]
public void OnInitReportOptions(ReportViewerOptions reportOption)
{
    if (reportOption.SubReportModel != null)
    {
        FileStream SubStream = new FileStream(System.Web.Hosting.HostingEnvironment.MapPath(@"~/Resources/" + reportOption.SubReportModel.ReportPath), FileMode.Open, FileAccess.Read);
        reportOption.SubReportModel.Stream = SubStream;
    }
}

How do I set a subreport parameter?

To change the parameter default values of a subreport in the Report Viewer, set them in the OnReportLoaded method of the Web API Controller, as 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" }
        });
    }
}

How do I modify the subreport data source connection string?

To change the credential and connection information of the data sources used in a subreport, use the SubReportModel in the Report Viewer 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>"));
    }
}

How do I set a subreport data source?

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

An RDL report has the connection information in the report definition itself, so you do not need to bind a data source.

1. Add the RDLC sub report and main reports to your application Resources folder. You can download the Product List reports.

2. Set the ReportPath and ReportServiceUrl properties of the Report Viewer as in the following code snippet:

   <div style="height: 650px;width: 950px;min-height:404px;">
       <Bold:ReportViewer runat="server" ID="viewer"
           ReportServiceUrl="/api/ReportViewer">
           ReportPath="~/Resources/product-list-main.rdlc"
           ProcessingMode="Local"
       </Bold:ReportViewer>
   </div>

3. Create a class and methods that returns business object data collection. Use the following code in the 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;
       }
   }

4. Bind the business object data values collection to the subreport by adding a new item to the DataSources as 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 must be the same as in the report definition.

How do I load a subreport as a stream?

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

[NonAction]
public void OnInitReportOptions(ReportViewerOptions reportOption)
{
    if (reportOption.SubReportModel != null)
    {
        FileStream reportStream = new FileStream(System.Web.Hosting.HostingEnvironment.MapPath(@"~/Resources/" + reportOption.SubReportModel.ReportPath), 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() });
    }
}