Click or drag to resize

PdfLiteStorageProvider Class

Defines the contract that RAD PDF implements to manage storage for Lite Document instances.
Gets or sets an object that specifies the storage provider used for Lite Documents with RAD PDF applications using this integration provider.
Inheritance Hierarchy

Namespace:  RadPdf.Lite
Assembly:  RadPdf (in RadPdf.dll) Version: 3.48.0.0 (3.48.0.0)
Syntax
Copy
public abstract class PdfLiteStorageProvider

The PdfLiteStorageProvider type exposes the following members.

Constructors
  NameDescription
Public methodPdfLiteStorageProvider
Creates a new instance of the PdfLiteStorageProvider class.
Top
Methods
  NameDescription
Public methodDeleteData
Deletes all data from the PdfLiteStorageProvider for the given session.
Public methodEquals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetData
Gets data from the PdfLiteStorageProvider for the given session and subtype.
Public methodGetDataStream
Gets data, as a Stream from the PdfLiteStorageProvider for the given session.
Public methodGetHashCode
Serves as a hash function for a particular type.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Public methodSetData
Sets data from the PdfLiteStorageProvider for the given session.
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
Top
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#
Copy
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#
Copy
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 web.config file registers the above custom Integration Provider. This example assumes that CustomPdfIntegrationProvider is in the directory App_Code of your ASP.NET web application.
XML
Copy
<?xml version="1.0"?>
<configuration>
  <appSettings>
    <add key="RadPdfLicenseKey" value="DEMO"/>
    <add key="RadPdfIntegrationProvider" value="CustomPdfIntegrationProvider,App_Code"/>
  </appSettings>
  <system.web>
    <httpHandlers>
      <add path="RadPdf.axd" verb="GET,POST" type="RadPdf.Web.HttpHandler.PdfHttpHandler"/>
    </httpHandlers>
  </system.web>
  <!--
    The system.webServer element is for use with IIS 7 (and later) when Managed Pipeline Mode is set to "Integrated".
    It will be ignored in other versions of IIS.
    -->
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <handlers>
      <add path="RadPdf.axd" verb="GET,POST" name="PdfHttpHandler" preCondition="integratedMode" type="RadPdf.Web.HttpHandler.PdfHttpHandler"/>
    </handlers>
  </system.webServer>
</configuration>
See Also