How to create a PowerPoint file in Xamarin-iOS
Syncfusion Essential Presentation is a .NET Presentation library used to create, read, and edit PowerPoint documents. Using this library, you can start creating an PowerPoint document in Xamarin.iOS.
Steps to create PowerPoint file programmatically:
- Create a new C# Xamarin iOS application project.
- Select a project template and select minimum iOS version and Device Support for the application.
- Install Syncfusion.Xamarin.Presentation NuGet package as a reference to the .NET Standard project in your Xamarin applications from NuGet.org.
- In project add new UIViewController class.
i)In AppDelegate.cs add the following code on FinishedLaunching() to load the UIViewController1 at top of the window.
//Load the UIViewController for UI Window Window.RootViewController = new UIViewController1();
ii)In UIViewController1.cs add the following code in the ViewDidLoad() method to add the button in the UIView.
var btn = UIButton.FromType(UIButtonType.System);
btn.Frame = new CoreGraphics.CGRect(20, 200, 280, 44);
btn.SetTitle("Generate Excel Document", UIControlState.Normal);
btn.TouchUpInside += OnButtonClicked;
View.AddSubview(btn);
- Include the following namespace in the UIViewController1.cs file.
using Syncfusion.Presentation;
- In the click event method (OnButtonClicked) add the following code to create an PowerPoint file and save it in a stream.
void OnButtonClicked(object sender, EventArgs e)
{
//Create PowerPoint Presentation
using (IPresentation pptxDoc = Presentation.Create())
{
//Add slide to the PowerPoint
ISlide slide = pptxDoc.Slides.Add(SlideLayoutType.Blank);
//Add textbox to the slide
IShape textboxShape = slide.AddTextBox(0, 0, 500, 500);
//Add paragraph to the textbody of textbox
IParagraph paragraph = textboxShape.TextBody.AddParagraph();
//Add a TextPart to the paragraph
ITextPart textPart = paragraph.AddTextPart();
//Add text to the TextPart
textPart.Text = "AdventureWorks Cycles, the fictitious company on which the AdventureWorks sample databases are based, is a large, multinational manufacturing company.";
//Create an istence for memory stream
MemoryStream memoryStream = new MemoryStream();
//Save powerpoint presentation into memory stream
pptxDoc.Save(memoryStream);
memoryStream.Position = 0;
//Create an instance for SaveIOS
SaveIOS saveIOS = new SaveIOS();
//save the memory stream as in required format
await saveIOS.SaveAndView("output.pptx", "application/powerpoint", memoryStream);
}
}
- Add the SaveIOS class to the project where the stream will be saved to a physical file and the file can be opened for viewing.
The code for SaveIOS class has been given below.
class SaveIOS
{
//Method to save document as a file and view the saved document
public async Task SaveAndView(string filename, string contentType, MemoryStream stream)
{
//Get the root path in iOS device.
string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
string filePath = Path.Combine(path, filename);
//Create a file and write the stream into it.
FileStream fileStream = File.Open(filePath, FileMode.Create);
stream.Position = 0;
stream.CopyTo(fileStream);
fileStream.Flush();
fileStream.Close();
//Invoke the saved document for viewing
UIViewController currentController = UIApplication.SharedApplication.KeyWindow.RootViewController;
while (currentController.PresentedViewController != null)
currentController = currentController.PresentedViewController;
UIView currentView = currentController.View;
QLPreviewController qlPreview = new QLPreviewController();
QLPreviewItem item = new QLPreviewItemBundle(filename, filePath);
qlPreview.DataSource = new PreviewControllerDS(item);
currentController.PresentViewController(qlPreview, true, null);
}
}
To preview the PowerPoint document in QuickLook, PreviewControllerDS, QLPreviewItemFileSystem and QLPreviewItemBundle classes have to be added in the project. The code for these helper classes can be found from this link (iOS -> PreviewControllerDS.cs).
- Compile and execute the application. Now this application creates a simple Excel document.
A complete working example to create Excel file in Xamarin iOS can be downloaded from Create-PowerPoint-file.zip.
Take a moment to peruse the documentation, where you can find basic slide creation in PowerPoint options along with features like Paragraphs, adding Shapes and Charts , organizing and analyzing data through Tables and most importantly PDF and Image conversions etc. with code examples.
Refer here to explore the rich set of Syncfusion Essential PowerPoint features.
Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer to link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.
