通過 .NET 管理 Microsoft® Visio 文件元數據
使用服務器端 .NET API 查看、添加、更新、刪除或提取內置和自定義 Visio 文件屬性。
.NET Visio API 支持標題、作者姓名、文檔統計等系統定義（內置）屬性以及名稱-值對形式的用戶定義（自定義）屬性的管理。有 Diagram 類 加載文件，以及 頁面集合 處理頁面的集合以及 頁麵類 用於表示單個頁面。與這些類、文檔屬性一起，customprops 使元數據管理的過程變得簡單。
管理內置屬性
為了管理系統定義的屬性，API 提供 文檔屬性 , 程序員可以輕鬆訪問內置屬性並更新其值。
C# 管理內置屬性的代碼
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| // For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-.NET | |
| // The path to the documents directory. | |
| string dataDir = RunExamples.GetDataDir_Shapes(); | |
| // Load a Visio diagram | |
| Diagram diagram = new Diagram(dataDir + "Drawing1.vsdx"); | |
| //// Display Visio version and document modification time at different stages | |
| Console.WriteLine("Visio Instance Version : " + diagram.Version); | |
| Console.WriteLine("Full Build Number Created : " + diagram.DocumentProps.BuildNumberCreated); | |
| Console.WriteLine("Full Build Number Edited : " + diagram.DocumentProps.BuildNumberEdited); | |
| Console.WriteLine("Date Created : " + diagram.DocumentProps.TimeCreated); | |
| Console.WriteLine("Date Last Edited : " + diagram.DocumentProps.TimeEdited); | |
| Console.WriteLine("Date Last Printed : " + diagram.DocumentProps.TimePrinted); | |
| Console.WriteLine("Date Last Saved : " + diagram.DocumentProps.TimeSaved); | |
| Console.WriteLine("CustomProps Length " + diagram.DocumentProps.CustomProps.Count); |
管理自定義屬性
為了管理用戶定義的屬性，API 提供 自定義道具 ，開發人員可以輕鬆訪問已添加的屬性以及添加新屬性。為了添加自定義屬性， 添加方法 添加屬性並返回新屬性的引用作為 自定義道具 目的。 CustomProp 類用於檢索文檔屬性的名稱、值和類型，如 姓名 , 自定義值 , 財產類型 枚舉值。
C# 在 Visio 文件中添加元數據的代碼
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| // For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-.NET | |
| // The path to the documents directory. | |
| string dataDir = RunExamples.GetDataDir_Shapes(); | |
| // Load a Visio diagram | |
| Diagram diagram = new Diagram(dataDir + "Drawing1.vsdx"); | |
| //// Get CustomProperties of diagram | |
| Aspose.Diagram.CustomPropCollection customProperties = diagram.DocumentProps.CustomProps; | |
| //Set property of CustomProp | |
| Aspose.Diagram.CustomProp customProp = new Aspose.Diagram.CustomProp(); | |
| customProp.PropType = Aspose.Diagram.PropType.String; | |
| customProp.CustomValue.ValueString = "Test"; | |
| //Add CustomProp to Collection | |
| customProperties.Add(customProp); |