How to Split Single PST File into Multiple PSTs & Merge Multiple PSTs using .NET

This technical tip explains how to .NET developers can split and Merge PST files using Aspose.Email.  Aspose.Email API provides the capability to split a single PST file into multiple PST files of desired file size. It can also merge multiple PST files into a single PST file. Both the splitting and merging of PSTs operations can be tracked by adding events to these operations.  Aspose.Email for .NET is a set of components allowing developers to easily implement email functionality within their ASP.NET web applications, web services & Windows applications. It Supports Outlook PST, EML, MSG & MHT formats.

//Code sample for Splitting a Single PST into multiple PSTs

 [C#]

using (PersonalStorage pst = PersonalStorage.FromFile(@"D:\test\source.pst"))
{
    // The events subscription is an optional step for the tracking process only.
    pst.StorageProcessed += PstSplit_OnStorageProcessed;
    pst.ItemMoved += PstSplit_OnItemMoved;

    // Splits into pst chunks with the size of 5mb
    pst.SplitInto(5000000, @"D:\test\chunks\");
}

 
[VB.NET]

Using pst As PersonalStorage = PersonalStorage.FromFile("D:\test\source.pst")
	' The events subscription is an optional step for the tracking process only.
	pst.StorageProcessed += PstSplit_OnStorageProcessed
	pst.ItemMoved += PstSplit_OnItemMoved

	' Splits into pst chunks with the size of 5mb
	pst.SplitInto(5000000, "D:\test\chunks\")


//Code sample for Merging of Multiple PSTs into a single PST
 
[C#]

totalAdded = 0;

using (PersonalStorage pst = PersonalStorage.FromFile(@"D:\test\destination.pst"))
{
    // The events subscription is an optional step for the tracking process only.
    pst.StorageProcessed += PstMerge_OnStorageProcessed;
    pst.ItemMoved += PstMerge_OnItemMoved;

    // Merges with the pst files that are located in separate folder.
    pst.MergeWith(Directory.GetFiles(@"D:\test\sources\"));
    Console.WriteLine("Total messages added: {0}", totalAdded);
}

[VB.NET]

totalAdded = 0

Using pst As PersonalStorage = PersonalStorage.FromFile("D:\test\destination.pst")
	' The events subscription is an optional step for the tracking process only.
	pst.StorageProcessed += PstMerge_OnStorageProcessed
	pst.ItemMoved += PstMerge_OnItemMoved

	' Merges with the pst files that are located in separate folder.
	pst.MergeWith(Directory.GetFiles("D:\test\sources\"))
	Console.WriteLine("Total messages added: {0}", totalAdded)
End Using

//Code sample Merging Folders from another PST

[C#]

totalAdded = 0;

using (PersonalStorage destinationPst = PersonalStorage.FromFile(@"D:\test\destination.pst"))
using (PersonalStorage sourcePst = PersonalStorage.FromFile(@"D:\test\source.pst"))
{
    FolderInfo destinationFolder = destinationPst.RootFolder.AddSubFolder("FolderFromAnotherPst");
    FolderInfo sourceFolder = sourcePst.GetPredefinedFolder(StandardIpmFolder.DeletedItems);

    // The events subscription is an optional step for the tracking process only.
    destinationFolder.ItemMoved += destinationFolder_ItemMoved;

    // Merges with the folder from another pst.
    destinationFolder.MergeWith(sourceFolder);

    Console.WriteLine("Total messages added: {0}", totalAdded);
}

[VB.NET]

totalAdded = 0

Using destinationPst As PersonalStorage = PersonalStorage.FromFile("D:\test\destination.pst")
	Using sourcePst As PersonalStorage = PersonalStorage.FromFile("D:\test\source.pst")
		Dim destinationFolder As FolderInfo = destinationPst.RootFolder.AddSubFolder("FolderFromAnotherPst")t
		Dim sourceFolder As FolderInfo = sourcePst.GetPredefinedFolder(StandardIpmFolder.DeletedItems)

		' The events subscription is an optional step for the tracking process only.
		destinationFolder.ItemMoved += destinationFolder_ItemMoved

		' Merges with the folder from another pst.
		destinationFolder.MergeWith(sourceFolder)

		Console.WriteLine("Total messages added: {0}", totalAdded)
	End Using
End Using
//Helping Methods
void destinationFolder_ItemMoved(object sender, ItemMovedEventArgs e)
    {
        totalAdded++;
    }

    void PstMerge_OnStorageProcessed(object sender, StorageProcessedEventArgs e)
    {
        Console.WriteLine("*** The storage is merging: {0}", e.FileName);
    }

    void PstMerge_OnItemMoved(object sender, ItemMovedEventArgs e)
    {
        if (currentFolder == null)
        {
            currentFolder = e.DestinationFolder.RetrieveFullPath();
        }

        string folderPath = e.DestinationFolder.RetrieveFullPath();

        if (currentFolder != folderPath)
        {
            Console.WriteLine("    Added {0} messages to \"{1}\"", messageCount, currentFolder);
            messageCount = 0;
            currentFolder = folderPath;
        }

        messageCount++;
        totalAdded++;
    }

    void PstSplit_OnStorageProcessed(object sender, StorageProcessedEventArgs e)
    {
        if (currentFolder != null)
        {
            Console.WriteLine("    Added {0} messages to \"{1}\"", messageCount, currentFolder);
        }

        messageCount = 0;
        currentFolder = null;
        Console.WriteLine("*** The chunk is processed: {0}", e.FileName);
    }

    void PstSplit_OnItemMoved(object sender, ItemMovedEventArgs e)
    {
        if (currentFolder == null)
        {
            currentFolder = e.DestinationFolder.RetrieveFullPath();
        }

        string folderPath = e.DestinationFolder.RetrieveFullPath();

        if (currentFolder != folderPath)
        {
            Console.WriteLine("    Added {0} messages to \"{1}\"", messageCount, currentFolder);
            messageCount = 0;
            currentFolder = folderPath;
        }

        messageCount++;
    }