How to resolve empty inputdlg box issue?

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John Doe 2020-7-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/563759-how-to-resolve-empty-inputdlg-box-issue

评论： Star Strider 2023-5-21

Hello everyone!

I have a inputdlg box. I want the inputdlg box to cancel the processing if the user pressed OK without giving any input in the inputdlg box. How can I do that?

I know how to cancel the processing if Cancel or the close button is pressed.

Thanks in advance!

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采纳的回答

Star Strider 2020-7-12

2
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/563759-how-to-resolve-empty-inputdlg-box-issue#answer_464735

在 MATLAB Online 中打开

Try this:

a = inputdlg('Type a number:')
if isempty(a{:})
    disp('a is empty')                                      % Information Only To Demonstrate That The Test Works
    return
end
fprintf('a = %f\n', str2double(a))

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Mpho 2023-5-21

Hi, thanks for the helpful answer. Could you please explain what the colon does?

Star Strider 2023-5-21

My pleasure!

The documentation on colon, : can explain it better than I can!

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