管理 PDF 中的元資料可見性

Curtis Chau

更新:2025年6月9日

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元資料類別中會顯示哪些內容？

任何能夠開啟 PDF 檔案的人士皆可查看元資料。這些細節包含以下項目：

// Assign metadata properties to a PDF document
Pdf.MetaData.Author = "John Doe";  // The author of the document
Pdf.MetaData.Keywords = "Key, Word";  // Keywords associated with the document
Pdf.MetaData.CreationDate = DateTime.Today;  // The date the document was created
Pdf.MetaData.ModifiedDate = DateTime.Now;  // The date and time the document was last modified
Pdf.MetaData.CustomProperties.Add("Test", "val");  // Custom properties for additional metadata
Pdf.MetaData.Producer = "test";  // The software used to produce the document
Pdf.MetaData.Subject = "test metadata";  // The subject of the document
Pdf.MetaData.Title = "test";  // The title of the document
Pdf.MetaData.Creator = "test";  // The original creator of the document

// Security settings for the PDF
Pdf.SecuritySettings.UserPassword = "ironuser";  // Password to open and view the PDF
Pdf.SecuritySettings.OwnerPassword = "ironowner";  // Password providing full permissions, including editing

// Assign metadata properties to a PDF document
Pdf.MetaData.Author = "John Doe";  // The author of the document
Pdf.MetaData.Keywords = "Key, Word";  // Keywords associated with the document
Pdf.MetaData.CreationDate = DateTime.Today;  // The date the document was created
Pdf.MetaData.ModifiedDate = DateTime.Now;  // The date and time the document was last modified
Pdf.MetaData.CustomProperties.Add("Test", "val");  // Custom properties for additional metadata
Pdf.MetaData.Producer = "test";  // The software used to produce the document
Pdf.MetaData.Subject = "test metadata";  // The subject of the document
Pdf.MetaData.Title = "test";  // The title of the document
Pdf.MetaData.Creator = "test";  // The original creator of the document

// Security settings for the PDF
Pdf.SecuritySettings.UserPassword = "ironuser";  // Password to open and view the PDF
Pdf.SecuritySettings.OwnerPassword = "ironowner";  // Password providing full permissions, including editing

' Assign metadata properties to a PDF document
Pdf.MetaData.Author = "John Doe" ' The author of the document
Pdf.MetaData.Keywords = "Key, Word" ' Keywords associated with the document
Pdf.MetaData.CreationDate = DateTime.Today ' The date the document was created
Pdf.MetaData.ModifiedDate = DateTime.Now ' The date and time the document was last modified
Pdf.MetaData.CustomProperties.Add("Test", "val") ' Custom properties for additional metadata
Pdf.MetaData.Producer = "test" ' The software used to produce the document
Pdf.MetaData.Subject = "test metadata" ' The subject of the document
Pdf.MetaData.Title = "test" ' The title of the document
Pdf.MetaData.Creator = "test" ' The original creator of the document

' Security settings for the PDF
Pdf.SecuritySettings.UserPassword = "ironuser" ' Password to open and view the PDF
Pdf.SecuritySettings.OwnerPassword = "ironowner" ' Password providing full permissions, including editing

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當僅設定"擁有者密碼"時，使用者將擁有 PDF 元資料的完整存取權限，包括檢視及修改所有文件屬性的能力。
若僅設定使用者密碼，則僅有知悉該密碼者才能開啟 PDF 檔案。使用者可以檢視元資料屬性，但修改元資料的權限受到限制。

請注意Adobe Acrobat Pro 允許使用者編輯 PDF 元資料，只要設定了 UserPassword 即可。相較之下，其他 PDF 檢視器（如 Foxit）則要求使用者除了輸入 UserPassword 來開啟並檢視 PDF 之外，還需提供 OwnerPassword 才能編輯 PDF 元資料。）}]