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);