// Using Microsoft.Reporting.NETCore (community) or the official package byte[] RenderReport(string reportPath, DataSet data)
using Microsoft.Reporting.WinForms; private void Form1_Load(object sender, EventArgs e)
LocalReport report = new LocalReport(); report.ReportPath = reportPath; report.DataSources.Add(new ReportDataSource("DataSet1", data.Tables[0])); string mimeType, encoding, fileNameExtension; Warning[] warnings; string[] streams; microsoft report viewer
// 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.
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 . // Using Microsoft
The strategic direction is (which uses the same RDL schema as SSRS 2016) and the Power BI Embedded platform. The modern Microsoft.ReportingServices.ReportViewerControl NuGet packages exist primarily to support the "lift and shift" of legacy applications to newer .NET runtimes, not to foster new development. Conclusion The Microsoft Report Viewer is a powerful, battle-tested tool that will continue to run corporate reporting for the foreseeable future. By understanding its versioning quirks, mastering the difference between Local and Remote modes, and learning how to render reports to PDF for modern web applications, you can maximize its utility while planning a gradual migration to cloud-native solutions.
// 1. Fetch your data (could be from SQL, JSON, or CSV) DataTable dt = GetSalesDataFromDatabase(); Open the RDLC file
// 5. (Optional) Set parameters var param = new ReportParameter("ReportTitle", "Q2 Sales"); reportViewer1.LocalReport.SetParameters(param);