lux/TestDevExpress/Services/MyReportProvider.cs

using DevExpress.Blazor.Reporting;
using DevExpress.DataAccess;
using DevExpress.DataAccess.Json;
using DevExpress.Drawing.Internal.Fonts.Interop;
using DevExpress.Security;
using DevExpress.XtraPrinting.Native.Properties;
using DevExpress.XtraReports;
using DevExpress.XtraReports.Services;
using DevExpress.XtraReports.UI;
using DevExpress.XtraReports.Web.ReportDesigner.Native;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.WebUtilities;
using System;
using System.Web;
using TestDevExpress.Components.Reports;

public class MyReportProvider : IReportProvider
{
    public XtraReport GetReport(string id, ReportProviderContext context)
    {
        // Parse the string with the report name and parameter values.
        string[] parts = id.Split('?');
        string reportName = parts[0];
        string parametersQueryString = parts.Length > 1 ? parts[2] : String.Empty;
        var par = parametersQueryString.Split('&');
        List<string> valueParList = new();
        for (int i = 0; i < par.Length; i++)
        {
            valueParList.Add(par[i].Split('=')[1]);
        }
        //var parameters = HttpUtility.ParseQueryString(parametersQueryString);
        string urlImg = valueParList[1];
        string url = parts[1].Split('=')[1] + "/" + valueParList[0];
        // Create a report instance.
        XtraReport report = null;
        if (reportName == "TestReport1")
            report = new OfferReport(urlImg, int.Parse(valueParList[0]));
        else
        {
            throw new DevExpress.XtraReports.Web.ClientControls.FaultException(
                string.Format("Could not find report '{0}'.", reportName)
            );
        }
        string reportFolder = "Reports";
        if (Directory.EnumerateFiles(reportFolder).
            Select(Path.GetFileNameWithoutExtension).Contains(reportName))
        {
            byte[] reportBytes = File.ReadAllBytes(Path.Combine(reportFolder, reportName + ".repx"));
            using (MemoryStream ms = new MemoryStream(reportBytes))
                report = XtraReport.FromXmlStream(ms);
        }
        report.Parameters["pOfferId"].Value = valueParList[0];
        report.Parameters["pImgPath"].Value = valueParList[1];
        var jsonDataSource = report.DataSource as JsonDataSource;
        if (jsonDataSource != null)
        {
            jsonDataSource.JsonSource = new UriJsonSource(new Uri(url));
            jsonDataSource.ConnectionName = null;
            //RequestParameters = false;
        }
        return report;
    }
}