add readme

Author: BrianDX

README.md

@@ -1,2 +1,11 @@
-# reporting-asp-net-core-standalone-parameters-panel
-The Standalone Report Parameters Panel component usage and customization example.
+# Reporting for ASP.NET Core - Standalone Report Parameters Panel
+
+This example shows how to use the standalone report options panel in an ASP.NET Core application.
+
+The application includes two pages: one with the standalone report options panel and the other with the document viewer. Both pages load the same sample report.
+The report is a list of invoices from the Northwind database. It includes parameters created in Visual Studio Report Designer that are used to filter the report data.
+The parameter panel layout is created in code in the report class constructor using the [ParameterPanelFluentBuilder] class (https://docs.devexpress.com/XtraReports/DevExpress.XtraReports.Parameters.ParameterPanelFluentBuilder). 
+
+A model for the Standalone Report Parameters Panel component is created in the ParametersPanel controller action on the server. The model contains a report instance with the layout information that the Standalone Report Parameters Panel retrieves. The parameter panel layout information is stored  in the [XtraReport.ParameterPanelLayoutItems](https://docs.devexpress.com/XtraReports/DevExpress.XtraReports.UI.XtraReport.ParameterPanelLayoutItems) collection.
+
+The client-side JavaScript code adds an Export button to the Standalone Report Parameter Panel component. When the user clicks the button, a request to the ExportReport controller action is executed, and the resulting PDF file is sent to the client.