Question

我编写了一个代码，用于创建从VB.NET 2005中的Crystal Reports导出的pdf文件。所有代码都运行正常，PDF文件也可以正常创建，但我想以编程方式为该PDF文件设置密码。有没有解决方案？

以下是从Crystal Reports导出时创建PDF文件的代码

Dim CrExportOptions As ExportOptions
Dim CrDiskFileDestinationOptions As New DiskFileDestinationOptions()
Dim CrFormatTypeOptions As New PdfRtfWordFormatOptions()

CrDiskFileDestinationOptions.DiskFileName = "D:\PDFFiles\" & fileName

CrFormatTypeOptions.FirstPageNumber = 1 ' Start Page in the Report

CrFormatTypeOptions.LastPageNumber = 10 ' End Page in the Report

CrFormatTypeOptions.UsePageRange = True


CrExportOptions = CrReport.ExportOptions

With CrExportOptions

    .ExportDestinationType = ExportDestinationType.DiskFile
    .ExportFormatType = ExportFormatType.PortableDocFormat

    .DestinationOptions = CrDiskFileDestinationOptions

    .FormatOptions = CrFormatTypeOptions

End With
CrReport.Export()

Answer 1

据我所知，Crystal Reports可以导出为PDF格式，但不能对生成的文件进行任何密码保护（请参阅许多类似帖子here之一）。您可以使用第三方工具来保护生成的PDF，但在导出期间无法执行此操作。有一篇文章我发现提到密码保护成功导出，但在尝试浏览上述网站失败后，我放弃了。亲自检查here，也许你有更多的运气。

克里斯

Answer 2

对于仍在寻找解决方案的人，我在PdfSharp的帮助下找到了一种方法。您可以使用 Nuget Package Manager 将pdfsharp添加到项目中。然后只需添加以下代码 -

System.IO.Stream st = CrReport.ExportToStream(ExportFormatType.PortableDocFormat);
PdfDocument document = PdfReader.Open(st);

PdfSecuritySettings securitySettings = document.SecuritySettings;

// Setting one of the passwords automatically sets the security level to 
// PdfDocumentSecurityLevel.Encrypted128Bit.
securitySettings.UserPassword = "user";
securitySettings.OwnerPassword = "owner";

// Don´t use 40 bit encryption unless needed for compatibility reasons
//securitySettings.DocumentSecurityLevel = PdfDocumentSecurityLevel.Encrypted40Bit;

// Restrict some rights.            
securitySettings.PermitAccessibilityExtractContent = false;
securitySettings.PermitAnnotations = false;
securitySettings.PermitAssembleDocument = false;
securitySettings.PermitExtractContent = false;
securitySettings.PermitFormsFill = true;
securitySettings.PermitFullQualityPrint = false;
securitySettings.PermitModifyDocument = true;
securitySettings.PermitPrint = false;

// Save the document...
document.Save(filename);

以编程方式从vb.net中的水晶报表导出时如何设置密码为pdf文件？

2 个答案: