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Use Select Case When Validating Sequential Steps

Use Select Case When Validating Sequential Steps

When validating a set of sequential steps, the Select Case structure can beused to step through each validation method. As each Case is cycledthrough, the validation method is called to test the Select Case logic.Each method in the Case statements is performed until the Select Case logicis true. So, each validation step is performed, in order, until one failsor all pass. I use this in the Wizard Manager “Finish” button click eventto validate each page in a simple wizard where data was entered. Thecorrection code causes the display of the offending Wizard frame andusually sets focus to the offending control (e.g. a textbox). This allowsthe user to move through the wizard pages without having to enter data.Once all data are entered, this method is called to validate the entireentry.

Example structure:

 Select Case False     Case ValidateStep1          'jump to correction code for step 1     Case ValidateStep2          'jump to correction code for step 2     Case ValidateStep3          'jump to correction code for step 3     Case ValidateStep4          'jump to correction code for step 4     Case ValidateStep5          'jump to correction code for step 5     Case Else          'all validation methods return trueEnd SelectPrivate Function ValidateStep1() as Boolean     'return true if validation is good     'return false otherwiseEnd Functionetc.
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