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PdfIntegrationProviderLiteStorageProvider Property

Gets or sets an object that specifies the storage 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 PdfLiteStorageProvider LiteStorageProvider { get; set; }

Property Value

Type: PdfLiteStorageProvider
Remarks

The PdfLiteStorageProvider is responsible for storing information associated with a given Lite Document session.

By default, RAD PDF uses the DefaultPdfLiteStorageProvider which uses the RAD PDF System Service and its storage.

Examples
The following example overrides the default PdfIntegrationProvider to create a custom Integration Provider for the web application. This custom provider stores data simply using the file system.
C#
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using System;
using System.IO;
using System.Web;

using RadPdf.Integration;

public class CustomPdfIntegrationProvider : PdfIntegrationProvider
{
    public CustomPdfIntegrationProvider() : base()
    {
        this.LiteStorageProvider = new CustomPdfLiteStorageProvider(@"C:\RadPdfStorage\");
    }
}
C#
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using System;
using System.IO;
using System.Web;

using RadPdf.Lite;

public class CustomPdfLiteStorageProvider : PdfLiteStorageProvider
{
    private readonly DirectoryInfo _dir;

    public CustomPdfLiteStorageProvider(string path) : base()
    {
        _dir = new DirectoryInfo(path);

        if (!_dir.Exists)
        {
            _dir.Create();
        }
    }

    private string GetPath(PdfLiteSession session, int subtype)
    {
        return Path.Combine(_dir.FullName, session.ID.ToString("N") + "-" + subtype.ToString() + ".dat");
    }

    public override void DeleteData(PdfLiteSession session)
    {
        FileInfo[] files = _dir.GetFiles(session.ID.ToString("N") + "*");

        foreach (FileInfo file in files)
        {
            lock (string.Intern(file.FullName))
            {
                file.Delete();
            }
        }
    }

    public override byte[] GetData(PdfLiteSession session, int subtype)
    {
        string path = GetPath(session, subtype);

        lock (string.Intern(path))
        {
            if (!File.Exists(path))
            {
                return null;
            }

            return File.ReadAllBytes(path);
        }
    }

    public override void SetData(PdfLiteSession session, int subtype, byte[] value)
    {
        string path = GetPath(session, subtype);

        lock (string.Intern(path))
        {
            File.WriteAllBytes(path, value);
        }
    }
}
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