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VB Databases Basics Beginning-level VB coding questions specific to using VB with databases. Issues not specific to database use will be redirected to other forums.
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Old May 14th, 2008, 12:02 PM
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Default Registering checked checkboxes in a database

Hi There folks,
I have probably an easy question for ya, I am trying to build a database in VB.net with some success however i'm getting really stuck on one issue. I have a list of checkboxes which will be checked whenever a brochure is sent or requested, this works fine until i try to query wither or not the checkboxes has been checked. I keep getting a data type mismatch error. In access i simply set the filter on sent brochure to yes and that gave me the results. I have been reading as much as possible on this and am getting no where i have found some articles that mention that checkboxes get stored in a 1/0 format and tried this to but no success. I need help in coding that if a checkbox is checked on the form 1st it hets stored in the table and second how to build a query to retive wither or not the sent checkbox has been checked.

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Old May 14th, 2008, 12:11 PM
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Checkboxes work in 1/0, but access works booleans in -1/0. Since the 0 is false in both cases, the best you can do is checkbox.value * -1 always, and you will get the rigth value inserted in the database, and the same when you recover your data.
For the query, you can still use true/false to get your data, or -1/0, whatever you like more...

HTH

Gonzalo

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Old May 14th, 2008, 12:41 PM
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Hi gbianchi, Thanks mate for responding however i am unsure what you mean, I know my ignorance must astound you when i try the query

SELECT ContactID, OrganisationName, ContactType, Title, Gender, FirstName, LastName, Address1, Address2, Address3, Address4, Address5, Address6,
                      [E-mail], [Phone#], [Mobile#], DateOfBirth, [Interest Area], [Interest Area2], [Interest Area3], [Interest Area4], [Interest Area5], SummerBrochureReq,
                      PTProspectusReq, FTProspectusReq, LeafletReq, PTbrochureReq, PosterA3Req, PosterA4Req, FlierReq, OtherReq, PTProspectusSent,
                      FTProspectusSent, SummerBrochureSent, LeafletSent, PTbrochureSent, PosterA3Sent, PosterA4Sent, FlierSent, OtherSent, OtherCourses, DateSent,
                      [Date()]
FROM [tblStudents&Organisations]
Where SummerBrochureSent=-1

I get no results at all and if i try with 0 i get all the records that are store irrespective of wither or not there checkboxes are checked or no, also true/false yes/no here always throws up the previous message


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Old May 14th, 2008, 01:05 PM
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If you get all the records with 0, then you are not storing changes into the database when you check or uncheck the checkboxes...

HTH

Gonzalo

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Old May 14th, 2008, 04:44 PM
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Thanks again friend, of course you are correct its seems that i am making changes that will show when the forms are loaded but not updating the database, Think i need to go back and look over the basics again. But thank you for ur response :)

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