Question

please help me:

I want the user to enter a file name containing numbers or/and letters (without a space).

so I have two problems:

1) I tried the next code, but the dialog box is opened and opened and opened…. because I don’t know how to edit the ‘answer’ input without to call the ‘inputdlg’ again.

2) checking the validity of the file name: I used the ‘isempty’ and ‘strfind’ functions, but I know there is an easier option to do this. In my code, I have to check each letter in other case:

    while isempty(strfind(answer,'=')) == 0 || isempty(strfind(answer,'*')) == 0 || ...

maybe with ‘regexp’ function, but I don’t know how to do this :/

so my code is:

prompt={'Enter the File name:'};
name='Input for file name';
numlines=1;
answer=inputdlg(prompt,name,numlines);
while isempty(strfind(answer,'=')) == 0
    answer=inputdlg(prompt,name,numlines);
end

Answer 1

As @bdecaf suggested in the comments, you could use UIPUTFILE function to display a “save as” type of dialog:

[fName,pName] = uiputfile({'*.xlsx' 'Excel (*.xlsx)'}, 'Save as', 'myfile.xlsx');
if pName==0, error('No file selected'); end
fullName = fullfile(pName,fName);

which returns something like:

>> fName
fName =
test.xlsx

>> fullName
fullName =
C:\Users\Amro\Documents\example\test.xlsx