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Computed Specification Formula greyed out RRS feed

  • Question

  • I have been trying to use the computed specification formula facility in a windows forms application but 'Formula' is greyed out and will not allow me to enter a formula (or anything else).  Does anyone know where I have gone wrong?

    The table is very basic - the first two columns are int and the third is supposed to add the two values (also int).

    Friday, June 27, 2014 5:44 PM

All replies

  • Hello ShropshireLad,

    Sorry please clarify the "computed specification formula facility " to us. I have't saw related controls in default WinForm classes.

    If you need to do something like this thread http://stackoverflow.com/questions/10062875/c-user-defined-formula ,try refer to the solution there for example refer to NCal, an open source code.

    Regards,



    Barry
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    Monday, June 30, 2014 6:38 AM
  • The computed specification is in the table properties.  Every video  I have seen on Youtube shows people entering formulae without a problem but mine won't accept any keystroke.
    Sunday, July 6, 2014 9:28 PM
  • AFAIK there is no Table component inside windows forms. Probably you are looking to a video which has nothing to do with Windows Forms, the topic of this forum.


    Success
    Cor

    Monday, July 7, 2014 6:48 AM
  • Maybe there is a misunderstanding.  The data source for a database table was dragged on to the form.  The Properties window for the data source shows the computed element formula but it won't accept any input.
    Wednesday, July 9, 2014 8:45 PM
  • The computed specification is in the table definition properties.
    Wednesday, July 9, 2014 8:59 PM
  • Hi ShropshireLad,

    Do you actually mean a datagridview with a datasource in it and you cannot modify the datasource(Dataset)?

    May I ask what have you done till now and can you share us a simple sample?

    For me a dataset in WinForm cannot easily be modified and here is the property window and I cannot see the Formula you mentioned:

    Please share us more information, a screenshot, a sample, a video etc.

    Regards,



    Barry
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    Friday, July 11, 2014 1:43 AM
  • This is an example of a dragged database table.

    At its properties there is nothing likewise formula.

    Maybe there is a column Forumula in the database. But that has not to be entered by the programmer, but is probably meant  to be used by the programmer.

    For that I advice you to visit the forum of your program language (which we don't know).


    Success
    Cor

    Friday, July 11, 2014 7:33 AM