Subject Re: field type binary not working on my form
From AGOSTINHO <AGOSTINHOTEIXEIRA@YAHOO.COM>
Date Sat, 16 Sep 2023 00:29:32 -0400
Newsgroups dbase.getting-started

Dear Mervyn I've tried what you advise but I get the following at the
Program Alert Error when searching the database.
Error:  No CATCH for exception, class:  EXCEPTION.
Error:  Data type mismatch.  Expecting:  Object
The Ignore and suspend button is dimmed and I click the Fix button and it
takes me to:
form.products1.requery()  //it will work the second time. :-)

function ENTRYFIELD4_onKey(nChar, nPosition,bShift,bControl)
   //form.rowset.first() // This is not necessary.
   //A requery() with the argument '%...%' for the LIKE predicate
   //examines every record in the table.

     form.products1.params['ag'] = '%'+this.value+'%'
   try
     form.products1.requery()  //If it doesn't work the first time
   catch(exception e)
===>     form.products1.requery()  //it will work the second time. :-)
   endtry
   return

Please what's can I do  to avoid this error
Thanks
A.Teixeira


Mervyn Bick Wrote:

> On 2023/09/11 06:18, AGOSTINHO wrote:
> > Dear group I just add a field type binary to my dbf file, I place a picture in it but when I drop the field from the field palette  to the
> > form it work OK when moving on the grid up and down but when doing a search
> > then I get an program alert error windows:
> > "Data type mismatch.  Expecting:  Object"
> > when click on FIX
> >
> > it points to form.products1.requery()
> >
> > function ENTRYFIELD4_onKey(nChar, nPosition,bShift,bControl)
> >        form.rowset.first()
> >        form.products1.params['ag'] = '%'+this.value+'%'
> > ==>  form.products1.requery()
> >
> > I would also like to know how do I EDIT-CHANGE-DELETE image when on the form, I don't see any option  how to program it from within the inspector.
> > Thanks
> > Agostinho
>
> It looks as if you've caught yourself a real, live bug. :-)  If you
> press the "Ignore" button and try again then it works without a problem.
>   This makes it easy to create a work-around.
>
> The work-around is
>
> function ENTRYFIELD4_onKey(nChar, nPosition,bShift,bControl)
>    //form.rowset.first() // This is not necessary.
>    //A requery() with the argument '%...%' for the LIKE predicate
>    //examines every record in the table.
>
>    form.products1.params['ag'] = '%'+this.value+'%'
>    try
>      form.products1.requery()  //If it doesn't work the first time
>    catch(exception e)
>      form.products1.requery()  //it will work the second time. :-)
>    endtry
>    return
>
> To delete a picture one can't simply null the field in the table as
> dBASE reports it as read-only.  I replace it (using replaceFromFile())
> with a dummy picture which shows the text "Picture not available".  The
> picture is attached if you care to use it.
>
> To change a picture simply use replaceFromFile() to save a new picture
> to the table.
>
> To edit a picture one would need to export it from the table using
> copyToFile(), edit it using an appropriate program and then use
> replaceFromFile() to put it back into the table.
>
> dBASE includes Fotografix.exe in the bundle and, according to the dBASE
> 2109 help file
>
> RUN(true,"C:\Program Files (x86)\dBASE\Plus12\Bin\fotografix.exe
> trans.gif")
>
> will open the program from within dBASE.  This works for me as I also
> have dBASE Plus12 installed.
>
> Fotografix.exe is also included with dBASE 2109 but
>
> RUN(true,"C:\Program Files (x86)\dBASE\Plus2019\Bin\fotografix.exe
> trans.gif")
>
> does NOT open the program on my computer.   Right-clicking on an image
> in the Navigator in dBASE Plus 2019 does, however, allow me to open the
> image in Fotografix.
>
>
> That said, just because dBASE allows you to do something doesn't mean
> you should.  There is a school of thought that holds that one shouldn't
> save images in a table.  One should rather keep all images in a folder
> and save the image name, including the path, to a text field in the
> table.  One can use the rowset's onNavigate event handler to display the
> image in an image control on the form as the user steps through the table.
>
> The only time I would ever consider saving images to a BLOB field in a
> table would be for identity photos and specimen signature where, for
> security reasons, one wouldn't want the images freely available.  Even
> then I would only consider this if the images were stored using a SQL
> server.  Even there it is not really necessary as access control to any
> file, including image files, is far tighter under SQL than with the BDE.
>
> Mervyn.
>
>
>
>
>
>
>
>
>



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