Variant.IsBoolean() Method
Version: Available or changed with runtime version 1.0.
Indicates whether an AL variant contains a Boolean variable.
Syntax
Ok := Variant.IsBoolean()
Note
This method can be invoked using property access syntax.
Parameters
Variant
Type: Variant
An instance of the Variant data type.
Return Value
Ok
Type: Boolean
true if the AL variant contains a Boolean variable, otherwise false.
Example
The following example determines whether an AL variant contains a Boolean variable. The code initializes the MyBoolean variable with a Boolean value. The MyBoolean variable is assigned to the variant variable that is named MyVariant. The IsBoolean method determines whether the variant contains a Boolean variable and stores the return value in the varResult variable. In this case, the variant contains a Boolean variable so true is returned and displayed in a message box. The Boolean value is obtained from the Critical field in the Item table. The IsCode Method (Variant) determines whether the variant contains a code variable. The return value is false because the variant does not contain a code.
var
ItemRec: Record Item;
MyBoolean: Boolean;
MyVariant: Variant;
varResult: Boolean;
Text000: Label 'Does the variant >%1< contain a Boolean variable? %2.';
Text001: Label 'Does the variant >%1< contain a code variable? %2.';
begin
MyBoolean := ItemRec.Critical;
MyVariant := MyBoolean;
varResult := MyVariant.IsBoolean;
Message(Text000,MyVariant,varResult);
varResult := MyVariant.IsCode;
Message(Text001,MyVariant,varResult);
end;