PST文件用于存儲與Outlook和Exchange程序中保存的電子郵件文件夾、地址、聯系信息、電子郵件消息和其他數據相關的信息。 Spire.Email支持讀取PST文件并獲取文件夾信息，如文件夾名稱，消息計數和未讀消息計數。

Step 1:將PST文件從磁盤加載到OutlookFile類的實例中。

OutlookFile olf = new OutlookFile(@"C:\Users\jack\Documents\Outlook Files\Sample.pst");

Step 2:獲取文件夾集合。

OutlookFolderCollection folderCollection = olf.RootOutlookFolder.GetSubFolders();

Step 3:遍歷集合并獲取集合中每個元素的文件夾信息。

foreach (OutlookFolder folder in folderCollection)
{
    Console.WriteLine("Folder: " + folder.Name);
    Console.WriteLine("Total items: " + folder.ItemCount);
    Console.WriteLine("Total unread items: " + folder.UnreadItemCount);
    Console.WriteLine("Whether this folder has subfolders: {0}", (folder.HasSubFolders)?"Yes":"No");
    Console.WriteLine("------------------Next Folder--------------------");
}

輸出：

完整代碼：

[C#]

OutlookFile olf = new OutlookFile(@"C:\Users\jack\Documents\Outlook Files\Sample.pst");
OutlookFolderCollection folderCollection = olf.RootOutlookFolder.GetSubFolders();
foreach (OutlookFolder folder in folderCollection)
{
    Console.WriteLine("Folder: " + folder.Name);
    Console.WriteLine("Total items: " + folder.ItemCount);
    Console.WriteLine("Total unread items: " + folder.UnreadItemCount);
    Console.WriteLine("Whether this folder has subfolders: {0}", (folder.HasSubFolders)?"Yes":"No");
    Console.WriteLine("------------------Next Folder--------------------");
}
Console.WriteLine("Completed");

[VB.NET]

Dim olf As New OutlookFile("C:\Users\jack\Documents\Outlook Files\Sample.pst")
Dim folderCollection As OutlookFolderCollection = olf.RootOutlookFolder.GetSubFolders()
For Each folder As OutlookFolder In folderCollection
    Console.WriteLine("Folder: " + folder.Name)
    Console.WriteLine("Total items: " + folder.ItemCount)
    Console.WriteLine("Total unread items: " + folder.UnreadItemCount)
    Console.WriteLine("Whether this folder has subfolders: {0}", If((folder.HasSubFolders), "Yes", "No"))
    Console.WriteLine("------------------Next Folder--------------------")
Next
Console.WriteLine("Completed")

慧都控件網