How can I open a hyperlink from a button callback in AppDesigner?
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Johannes
el 15 de Feb. de 2024
I am creating an app where I would like to access information via an Edit field and a button. The user can write a specific number (system code) in the EditField and read information in a UITable below. For further reading I'd like to implement a button that calls the webpage where the PDF with additional information is stored. The links to the webpages regarding the selected code are stored as strings in an Excel file. So far I can access the right links as strings but I struggle to call the actual website. So far I have tried the "web" and "webpage" functions.
Initialization of public properties:
properties (Access = public)
links = readtable("guide_filling_code_neu_2.xlsx", 'Range', 'K1:K87','PreserveVariableNames', true);
codeguide = readtable("guide_filling_code_neu_2.xlsx", 'Range', 'A1:J87', 'PreserveVariableNames', true);
end
In the button callback function:
filling_code = app.SearchforfillingcodeEditField.Value;
r_1 = ismember(app.codeguide.('Filling Code'),filling_code); %Ermittlung der richtigen Reihe nach Eingabe
row = find(r_1);
linkstring = app.links(row,:);
linkstring = string(linkstring{:,:});
web(linkstring,'UniformOutput', false)
The execution brings the error
Error using web
Non-scalar in Uniform output, at index 1, output 1.
Set 'UniformOutput' to false.
Error in guide_filling_system/DetailsPDFButtonPushed (line 1445)
web(linkstring,'UniformOutput', false)
2 comentarios
Fangjun Jiang
el 16 de Feb. de 2024
Can you paste the value of linkstring when web() is executed? I am suprised by the error message because no output is needed.
Respuesta aceptada
Cris LaPierre
el 16 de Feb. de 2024
Editada: Cris LaPierre
el 16 de Feb. de 2024
I get an error when using the command you shared
linkstring = 'https://www.mathworks.com';
web(linkstring,'UniformOutput', false)
If I make the input argument a string, I do not.
web(linkstring,'UniformOutput', 'false')
However, I'm not sure you even need that name-value pair. At least, I can't find it documented for this function. Why not just use web(linkstring)?
One concern I would have is this code
linkstring = app.links(row,:);
linkstring = string(linkstring{:,:});
We can't see what your variable values are, but a url should not span multiple colums. If this is a workaround because your url is a character array, I suggest using the "TextType","string" option in readtable instead.
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