Inserting a new Page in Visio
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VSTO
Below is the code to add new page and you can’t set the page id that is the drawback we have in MS Visio.
// Add a new blank page
Application.ActiveDocument.Pages.Add();
// there is no way to manually set the id of the page in VSTO
Aspose.Diagram
The Add method, exposed by the Pages collection, allows you to add a new blank page into a Visio drawing. It must set the page ID. Below is the code examples for this:
// Load diagram
Diagram diagram = new Diagram(@"E:\Aspose\Aspose Vs VSTO\Aspose.Diagram Vs VSTO Visio v1.1\Sample Files\Drawing1.vsd");
// Get max page ID
int MaxPageId = GetMaxPageID(diagram);
// Initialize a new page object
Page newPage = new Page();
// Set name
newPage.Name = "new page";
// Set page ID
newPage.ID = MaxPageId + 1;
// Or try the Page constructor
// Page newPage = new Page(MaxPageId + 1);
// Add a new blank page
diagram.Pages.Add(newPage);
// Save diagram
diagram.Save(@"E:\Aspose\Aspose Vs VSTO\Aspose.Diagram Vs VSTO Visio v1.1\Sample Files\Output.vdx", SaveFileFormat.VDX);