Microsoft Report Viewer May 2026
// 1. Fetch your data (could be from SQL, JSON, or CSV) DataTable dt = GetSalesDataFromDatabase();
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
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 . or CSV) DataTable dt = GetSalesDataFromDatabase()
// 2. Set the report viewer's processing mode to Local reportViewer1.ProcessingMode = ProcessingMode.Local; LocalReport report = new LocalReport()

