ISBOOLEAN Function (Variant)

Indicates whether a C/AL variant contains a Boolean variable.

Syntax

  
Ok := Variant.ISBOOLEAN  

Parameters

Variant
Type: Variant

Property Value/Return Value

Type: Boolean

true if the C/AL variant contains a Boolean variable; otherwise, false.

Example

The following example determines whether a C/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 function 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 Yes is returned and displayed in a message box. The Boolean value is obtained from the Critical field in the Item table. The ISCODE Function (Variant) determines whether the variant contains a code variable. The return value is No because the variant does not contain a code. This example requires that you create the following variables and text constants in the C/AL Globals window.

Variable name	DataType	Subtype
ItemRec	Record	Item
MyBoolean	Boolean	Not applicable
MyVariant	Variant	Not applicable
varResult	Boolean	Not applicable

Text constant name	ConstValue
Text000	Does the variant >%1< contain a Boolean variable? %2
Text001	Does the variant >%1< contain a code variable? %2

MyBoolean := ItemRec.Critical;  
MyVariant := MyBoolean;  
varResult := MyVariant.ISBOOLEAN;  
MESSAGE(Text000,MyVariant,varResult);  
varResult := MyVariant.ISCODE;  
MESSAGE(Text001,MyVariant,varResult);  

See Also

Variant Data Type