Microsoft Report Viewer Today

Open the RDLC file. Go to View → Report Data. Right-click DataSets → Add Dataset. Set the DataSource to MyDataSet and the available dataset to SalesData .

Install-Package Microsoft.ReportingServices.ReportViewerControl.WinForms microsoft report viewer

// Using Microsoft.Reporting.NETCore (community) or the official package byte[] RenderReport(string reportPath, DataSet data) Open the RDLC file

// 1. Fetch your data (could be from SQL, JSON, or CSV) DataTable dt = GetSalesDataFromDatabase(); or CSV) DataTable dt = GetSalesDataFromDatabase()

// 6. Refresh the report reportViewer1.RefreshReport(); Since there is no native .NET Core report viewer, you must use the WebForms control inside an ASP.NET Core project with the Microsoft.AspNetCore.SystemWebAdapters . This is an advanced scenario; for simpler web needs, consider rendering reports to PDF on the server and sending the PDF to the client.