How can I Embed a file in a web app？

Hi guys:

My web app wants to implement such a function:

Embed a PPT or PDF document into the program, and then when the user clicks the download button, the document can be downloaded locally. I tried to use uigetfile, but I couldn't realize this function. What should I do?

Answer 1

[Tridib]

Hi @Ding Yong,

“uigetfile” function will not work here because it is used for opening files, not saving. “uiputfile” function is used for saving files.

• Firstly, place the desired PPT or PDF file in the same folder as the .mlapp file.
• Then, add the following code to the download button’s callback function:

        % Button pushed function: Button
        function ButtonPushed(app, event)

            % Desired document
            filename = 'mydoc.pdf';
            
            % Getting the app's folder and then the desired file
            appFolder = fileparts(mfilename('fullpath'));
            sourceFile = fullfile(appFolder, filename);
            
            % Asking the user where to save the file
            [file, path] = uiputfile({'*.pdf;*.pptx','Documents (*.pdf, *.pptx)'}, ...
                'Save As', filename);
            if isequal(file,0)
                return; % If user cancels
            end
            
            % Copying the file to the user's chosen location
            destination = fullfile(path, file);
            try
                copyfile(sourceFile, destination);
                uialert(app.UIFigure, 'Document downloaded successfully!', 'Success');
            catch ME
                uialert(app.UIFigure, ['Failed to download: ' ME.message], 'Error');
            end
        end

Through this, you will be able to achieve the required functionality in your app.

To create and deploy a corresponding web app for your app, refer to the following documentation:

https://www.mathworks.com/help/compiler/webapps/create-and-deploy-a-web-app.html

For more information regarding the used functions, refer to the following documentation:

uiputfile: https://www.mathworks.com/help/matlab/ref/uiputfile.html

uialert: https://www.mathworks.com/help/matlab/ref/uialert.html

For more help, you may refer to a similar MATLAB answer:

https://www.mathworks.com/matlabcentral/answers/1957429-opening-pdf-from-web-app

Hope this helps!