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PdfIntegrationProviderLiteSessionProvider Property

Gets or sets an object that specifies the session provider used for Lite Documents with RAD PDF applications using this integration provider.

Namespace:  RadPdf.Integration
Assembly:  RadPdfStandard (in RadPdfStandard.dll) Version: 4.1.0.0 (4.1.0.0)
Syntax
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public PdfLiteSessionProvider LiteSessionProvider { get; set; }

Property Value

Type: PdfLiteSessionProvider
Remarks

The PdfLiteSessionProvider is responsible for associating a PdfLiteSession with a document key (string).

By default, RAD PDF uses the DefaultPdfLiteSessionProvider which uses the ASP.NET session state.

Examples
The following example overrides the default PdfIntegrationProvider to create a custom Integration Provider for the web application. This custom provider assigns a custom LiteSessionProvider which uses a simple dictionary.
C#
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using System;
using System.Web;

using RadPdf.Integration;

public class CustomPdfIntegrationProvider : PdfIntegrationProvider
{
    public CustomPdfIntegrationProvider() : base()
    {
        this.LiteSessionProvider = new CustomPdfLiteSessionProvider();
    }
}
C#
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using System;
using System.Collections.Concurrent;
using System.Web;

using RadPdf.Lite;

public class CustomPdfLiteSessionProvider : PdfLiteSessionProvider
{
    // This example uses an in memory dictionary, which won't have 
    // persistent storage, but a database or other key /value store
    // can easily be substituted.
    private readonly ConcurrentDictionary<string, byte[]> _dict;

    public CustomPdfLiteSessionProvider() : base()
    {
        _dict = new ConcurrentDictionary<string, byte[]>();
    }

    public override string AddSession(PdfLiteSession session)
    {
        string key = GenerateKey();

        _dict[key] = session.Serialize();

        return key;
    }

    public override PdfLiteSession GetSession(string key)
    {
        byte[] data = _dict[key];
        if (null == data)
        {
            return null;
        }

        return PdfLiteSession.Deserialize(data);
    }
}
The following Program.cs file registers the above custom Integration Provider. This example assumes that CustomPdfIntegrationProvider is in namespace referenced by your ASP.NET web application.
C#
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using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

using RadPdf;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorPages();
builder.Services.AddSession();

var app = builder.Build();

app.UseStaticFiles();

app.UseRouting();

app.UseSession();

app.UseAuthorization();

// Or however you normally process page requests
app.MapRazorPages();

// Create middleware settings
RadPdfCoreMiddlewareSettings settings = new RadPdfCoreMiddlewareSettings()
{
    // Add SQL Server Connection String, if not using Lite Documents
    // Sample connection string below connects to a SQL Server Express instance on localhost
    // TrustServerCertificate=True is set to avoid a trust exception (e.g. "The certificate chain was issued by an authority that is not trusted.")
    // ConnectionString = @"Server=.\SQLExpress;Database=RadPdf;Trusted_Connection=Yes;TrustServerCertificate=True;",

    // Add License Key
    LicenseKey = "DEMO",

    // Attach the Integration Provider
    IntegrationProvider = new CustomPdfIntegrationProvider()

    // To run RAD PDF without the System Service, add UseService = false
    // If using Lite Documents without the System Service, a LiteStorageProvider must also be implemented
    //UseService = false
};

// Add RAD PDF's middleware to app
app.UseRadPdf(settings);

app.Run();
See Also