Integrating RDLC reports in Blazor Web apps

Question

Hello,

Is it possible to call RDLC reports in a Blazor web app or use report viewer to load RDLC reports? I'm not seeing the reporting options in the latest framework. Could someone please share examples and resources for integrating RDLC reports with .NET Blazor framework? Thank you.

Best regards, Diwakar

Accepted Answer

Hi @Diwakar Devangam,

Since .rdlc is based on .Net Framework, so you can use RDLC in windows platform. Linux is not support. You can follow my steps to implement this requirement.

Step 1

Create a Blazor Web Application and Windows Froms App.

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Step 2

Create report in Windows Froms App, and copy it to Blazor Web Application.

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Step 3

Click Report1.rdlc file (1) and right click Parameters folder to add a new Parameter(2). Then right click blank area to insert a testbox.

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Then drag ReportParameter1 into the textbox. All configuration items in these steps use the default values, and you can directly click Next to create them.
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Step 4

I am using Controller in Blazor Web App to render data.

Program.cs

using RDLC_BlazorWebApp.Components;

namespace RDLC_BlazorWebApp
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var builder = WebApplication.CreateBuilder(args);


            builder.Services.AddRazorComponents()
                .AddInteractiveServerComponents();
            // add this line
            builder.Services.AddControllers();

            var app = builder.Build();


            if (!app.Environment.IsDevelopment())
            {
                app.UseExceptionHandler("/Error");
               
                app.UseHsts();
            }

            app.UseHttpsRedirection();

            app.UseStaticFiles();
                
            app.UseAntiforgery();
            app.MapRazorComponents()
                .AddInteractiveServerRenderMode();
            // add this line
            app.MapControllers();

            app.Run();
        }
    }
}

HomeController

using AspNetCore.Reporting;
using Microsoft.AspNetCore.Components.RenderTree;
using Microsoft.AspNetCore.Mvc;

namespace RDLC_BlazorWebApp.Controllers
{
    [ApiController]
    [Route("[controller]")]
    public class HomeController : Controller
    {
        private readonly ILogger _logger;
        private readonly IWebHostEnvironment _webHostEnvironment;

        public HomeController(ILogger logger, IWebHostEnvironment webHostEnvironment)
        {
            _logger = logger;
            this._webHostEnvironment = webHostEnvironment;
            System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);

        }
        [HttpGet("print")]
        public IActionResult Print() {
            string mimetype = "";
            int extension = 1;
            var path = $"{this._webHostEnvironment.WebRootPath}\Reports\Report1.rdlc";
            Dictionary parameters = new Dictionary();
            parameters.Add("ReportParameter1", "RDLC in Blazor Web Application.");
            LocalReport localReport = new LocalReport(path);
            var result = localReport.Execute(RenderType.Pdf, extension,parameters,mimetype);
            return File(result.MainStream,"application/pdf");
        }
        
    }
}

**
Step 5 Required**

My Packages



  
    net8.0
    enable
    enable
  

  
    
  

  
    
      Always

Step 6 Others

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        RDLC_BlazorWebApp
    





    
        
            
                 Home
            
        

        
            
                 Counter
            
        

        
            
                 Weather
            
        
        
            
                 RDLC

Step 7 Test Result

Animation

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Best regards,

Jason

Answer

Hi JasonPan - MSFT,

RDLC Error.png

Thank you for your prompt response. I tried your solution shared here, but the getting the below error.

DefinitionInvalidException: The definition of the report 'C:\Learning\RDLC_BlazorWebApp\RDLC_BlazorWebApp\wwwroot\Reports\Report1.rdlc' is invalid.

An unexpected error occurred in Report Processing.

Compiler executable file C:\WINDOWS\Microsoft.NET\Framework64\v8.0.0\vbc.exe cannot be found.

Can you please help me, if anything missing.

Thanks

Diwakar

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Integrating RDLC reports in Blazor Web apps

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