How to open current working directory if a certain folder doesn't exists in the directory?

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Sanjay Yadav 2017-1-13

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评论： Stephen23 2021-2-14

So here is my code on a pushbutton callback:

prompt = {'Enter Patient Name or ID:'};
title = 'Input';
num_lines = 1;
defaultans = {'Patient'};
answer = inputdlg(prompt,title,num_lines,defaultans);
handles.file = cellstr(answer{1});
%Creating a new folder by the name of Patient's name that user entered
folder = handles.file{1}
guidata(hObject, handles);
mkdir(folder);

By far its working fine, now in a different pushbutton callback I want to display an error if the folder of same name already exists

folder = handles.file{1}
if exist(folder,'dir')
      winopen(folder);
else
      winopen(pwd);
end

But it shows error : Reference to non-existent field 'file'. Please Help. Thanks in advance

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Rena Berman 2017-1-20

(Answers Dev) Restored Question.

Stephen23 2021-2-14

http://web.archive.org/web/20210214185451/https://www.mathworks.com/matlabcentral/answers/320271-how-to-open-current-working-directory-if-a-certain-folder-doesn-t-exists-in-the-directory

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回答（1 个）

Adam 2017-1-13

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编辑：Adam 2017-1-13

在 MATLAB Online 中打开

if exist( folder, 'dir' )

will test if a folder exists or not on the file system. Judging by your attempts at it though I'm not sure that is what you are asking for since you are checking if it exists on handles or if it is a string cell.

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Adam 2017-1-13

在 MATLAB Online 中打开

The guidata needs to be after the code in which you assign 'file' to 'handles', not when you access it.

I don't understand how you can be getting the error only sometimes. Either 'file' is a field or it isn't unless you keep clearing it or doing different things each time you run it.

winopen( pwd )

should not care whether 'file' exists on handles or not.

Adam 2017-1-13

Then you must be doing something else in code you haven't shared as this error does not make sense.

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