Executes one of several groups of statements, depending on the value of an expression.
Select Case testexpression
[Case expressionlist-n
[statements-n]] . . .
[Case Else
[elsestatements]]
End Select
The Select Case statement syntax has these parts:
|
Part |
Description |
|
testexpression |
Any numeric or string expression. |
|
expressionlist-n |
Delimited list of one or more of the following forms: expression, expression To expression, Is comparisonoperator expression. The To keyword specifies a range of values. If you use the To keyword, the smaller value must appear before To. Use the Is keyword with comparison operators (except Is and Like) to specify a range of values. If not supplied, the Is keyword is automatically inserted. |
|
statements-n |
One or more statements executed if testexpression matches any part of expressionlist-n. |
|
elsestatements |
One or more statements executed if testexpression doesn’t match any of the Case clause. |
If testexpression matches any expressionlist expression associated with a Case clause, the statements following that Case clause are executed up to the next Case clause, or, for the last clause, up to the End Select. Control then passes to the statement following End Select. If testexpression matches an expressionlist expression in more than one Case clause, only the statements following the first match are executed.
The Case Else clause is used to indicate the statements to be executed if no match is found between the testexpression and an expressionlist in any of the other Case selections. When there is no Case Else statement and no expression listed in the Case clauses matches testexpression, execution continues at the statement following End Select.
Although not required, it is a good idea to have a Case Else statement in your Select Case block to handle unforeseen testexpression values.
You can use multiple expressions or ranges in each Case clause. For example, the following line is valid:
Case 1 To 4, 7 To 9, 11, 13, Is > MaxNumber
Note The Is comparison operator is not the same as the Is keyword used in the Select Case statement.
You also can specify ranges and multiple expressions for character strings. In the following example, Case matches strings that are exactly equal to everything, strings that fall between nuts and soup in alphabetical order, and the current value of TestItem:
Case "everything", "nuts" To "soup", TestItem
Select Case statements can be nested. Each Select Case statement must have a matching End Select statement.
If...Then...Else Statement; On...GoSub, On...GoTo Statements.
This example uses the Select Case statement to evaluate the value of a variable. The second Case clause contains the value of the variable being evaluated, and therefore only the statement associated with it is executed.
Number = 8 ' Initialize variable.Case Number ' Evaluate Number.1 To 5 ' Number between 1 and 5.
Debug.Print "Between 1 and 5"
' The following is the only Case clause that evaluates to True.6, 7, 8 ' Number between 6 and 8.
Debug.Print "Between 6 and 8"Is > 8 And Number < 11 ' Number is 9 or 10..Print "Greater than 8"Else ' Other values.
Debug.Print "Not between 1 and 10"Select