Declaration of Methods

Artikkeli
05/18/2015

Applies To: Microsoft Dynamics AX 2012 R3, Microsoft Dynamics AX 2012 R2, Microsoft Dynamics AX 2012 Feature Pack, Microsoft Dynamics AX 2012

Methods are created using the Application Object Tree (AOT). When methods are created, MorphX creates a default declaration that must be altered.

Method declarations consist of a header and a body. The method header declares the name and return type (possibly void) of the method, the method modifiers, and parameters. The method body consists of variable declarations, method declarations, and statements.

Return Type

If a method does not return anything, you must specify this with the void keyword.

void methodName()

{

...

}

If a method returns something, you must specify the return type and include a return statement.

int methodName()

{

return myInt;

}

Syntax

Method declaration	=	Heading Body
Heading	=	[ Modifiers ] ReturnType MethodName ( ParameterList )
Modifiers	=	[client] [server] [edit \| display \| public \| protected \| private] [static \| abstract \| final ]
ReturnType	=	Datatype \| void \| anytype
MethodName	=	Identifier
ParameterList	=	[ Parameter { , Parameter }]
Parameter	=	Datatype Variableidentifier [ = Expression ]
Body	=	{ [ VariableDeclarations ] [ EmbeddedFunctionDeclarations ] [ Statements ] }
EmbeddedFunctionDeclaration	=	Heading {[ VariableDeclarations ] [ Statements ]}

Note

If you use the anytype return type, the method can return any data type.

Examples

Method Without a Return Type

    void update ()
    {   
        // Variable declared and initialized
        CustTable this_Orig = this.orig();
     
        // First statement in body (begin transaction)
        ttsBegin;
        this.setNameAlias();
        // Calls super's implementation of update
        super();
        this.setAccountOnVend(this_Orig);
        if (this_Orig.custGroup != this.custGroup)
            ForecastSales::setCustGroupId(
                this.accountNum,
                this_Orig.custGroup,
                this.custGroup);
     
        // Commits transaction
        ttsCommit;
    }

Method with Parameters

    boolean checkAccountBlocked(AmountCur amountCur)
    {
        if (this.blocked == CustVendorBlocked::All 
            ||(this.blocked == CustVendorBlocked::Invoice 
            && amountCur > 0 ))
        return checkFailed(strFmt("@SYS7987",this.accountNum));
     
        return true;
    }

checkAccountBlocked returns a Boolean value and acts on the parameter amountCur.

Methods with Modifiers

Only the method headers are shown in the following examples.

    // A method that cannot be overridden
    final int dontAlterMe() 
    
    // A static method 
    static void noChange()
    
    // A display method that returns an integer
    display int value()

Jaa