New topic: basic question ref variables and textfields
<http://forums.realsoftware.com/viewtopic.php?t=38398> Page 1 of 1 [ 8 posts ] Previous topic | Next topic Author Message achundee Post subject: basic question ref variables and textfieldsPosted: Wed Mar 30, 2011 8:16 am Joined: Wed Mar 30, 2011 7:57 am Posts: 4 Hi all, I have a very nooby question if you don't mind please: I have created a texfield into which I am expecting a number to be typed in. I know that to read the contents into a variable I can use the code myvariable = val(textfield.text). I know to use "val" as I have seen an example, but I don't understand what type of command "val" is in this case and why I should use it. So now I am trying something different, I don't know what to do. The bit where i get stuck is that I want a label to show the contents of "myvariable" If I use label.txt = myvariable I get a type mismatch. Looks like I need to use something like "val" with myvariable, but I don't know what to use? Can anyone help please, and if the answer is in some documentation somewhere, can you tell me where I should be looking? I have tried the realbasic variables tutorial but it doesn't say anything about types, and using them in the way I want to. Thanks in advance! Top DaveS Post subject: Re: basic question ref variables and textfieldsPosted: Wed Mar 30, 2011 8:42 am Joined: Sun Aug 05, 2007 10:46 am Posts: 2888 Location: San Diego, CA VAL is an intrinsic function (ie.. Built in to Real Studio) Its purpose is to convert a STRING type variable to a NUMERIC type variable (integer or double) There is another intrinsic function (one of a few) called STR that does the exact opposite... converts a NUMERIC type variable to a STRING variable Code:dim mynumeric as integer dim mystring as string mynumeric=val("1234") // "1234" is a string because it is in quotes mystring=str(mynumeric) A "type mismatch" error means you are attempting to assign a STRING value to a NUMERIC variable or vice-versa label1.text=mynumeric is a "type mismatch".. label1.text is a STRING, but mynumeric is NOT label1.text=str(mynumeric) does work _________________ Dave Sisemore MacPro, OSX 10.6.4 RB2009r5.1 Note : I am not interested in any solutions that involve custom Plug-ins of any kind Top achundee Post subject: Re: basic question ref variables and textfieldsPosted: Wed Mar 30, 2011 9:03 am Joined: Wed Mar 30, 2011 7:57 am Posts: 4 Thank you so much for a comprehensive answer! Was that something mega-obvious that I missed in some documentation somewhere? Top mjh Post subject: Re: basic question ref variables and textfieldsPosted: Wed Mar 30, 2011 9:03 am Joined: Sun Feb 19, 2006 3:10 pm Posts: 1175 Location: Hamburg, Germany achundee wrote:I know to use "val" as I have seen an example, but I don't understand what type of command "val" is in this case and why I should use it. Answering this kind of question is what the built-in Language Reference is for. For example, see http://docs.realsoftware.com/index.php/Val. If you read the documentation you will also realize why you should use CDbl instead of Val in this case. _________________ Michael J. HuÃmann http://digicam-experts.de Top DaveS Post subject: Re: basic question ref variables and textfieldsPosted: Wed Mar 30, 2011 9:09 am Joined: Sun Aug 05, 2007 10:46 am Posts: 2888 Location: San Diego, CA achundee wrote:Thank you so much for a comprehensive answer! Was that something mega-obvious that I missed in some documentation somewhere? Very much so...... it is something you missed.... _________________ Dave Sisemore MacPro, OSX 10.6.4 RB2009r5.1 Note : I am not interested in any solutions that involve custom Plug-ins of any kind Top achundee Post subject: Re: basic question ref variables and textfieldsPosted: Wed Mar 30, 2011 9:15 am Joined: Wed Mar 30, 2011 7:57 am Posts: 4 DaveS wrote:achundee wrote:Thank you so much for a comprehensive answer! Was that something mega-obvious that I missed in some documentation somewhere? Very much so...... it is something you missed.... ok thanks for letting me know. I am using a trial at the moment - would I have found the answer in the documentation that comes with the trial (or online), or is the full documentation bundled with the full version of the software? Thanks! Top mjh Post subject: Re: basic question ref variables and textfieldsPosted: Wed Mar 30, 2011 9:25 am Joined: Sun Feb 19, 2006 3:10 pm Posts: 1175 Location: Hamburg, Germany achundee wrote:I am using a trial at the moment - would I have found the answer in the documentation that comes with the trial (or online) Yep, you would have. The trial version is the full version minus a license. _________________ Michael J. HuÃmann http://digicam-experts.de Top achundee Post subject: Re: basic question ref variables and textfieldsPosted: Wed Mar 30, 2011 9:35 am Joined: Wed Mar 30, 2011 7:57 am Posts: 4 Aah - sorry I see where I should have been looking now - sorry to waste everyone's time! Top Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending Page 1 of 1 [ 8 posts ]
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