Retrieve label of EDT

How to get the label of an EDT?

See \Classes\DialogField\init
setting the label:
o.label(dictType.label(f));
with the dictType being:
dictType = new DictType(xtype);
and xtype being:
xtype = type >> 16;


Why do we have to right shift 16?
see \Classes\SysDictField\new
there you find a left shift 16
and global::fieldExt2Id does:
return (fieldExtId & 0xffff);

Also see http://www.eggheadcafe.com/software/aspnet/29515376/addfield-parameters.aspx
exerpt:
typeid() function gives you the id of a type. For eg:
you can try the following code in a job:
static void job1()
{;
print typeid(custAccount);
pause;
}
This will print out 6488075. In the AOT if you check up the ID of CustAcount
it is 99. But the above number that get from typeid function is a
combination of the ID in the AOT and the flag indicating that it is a user
type. The upper 16 bits contain the ID from the AOT (99)and the lower 16
bits contain the flag that it is a user type (11)
6488705 == (99 << 16 | 11)


Example:
public boolean validate(Object calledFrom)
{
    boolean ret;
    ToDate todate;
    dictType dictTypeLocal;
    ;


    ret = super(calledFrom);


    if (!toDate)
    {
        dictTypeLocal = new dictType(typeId(todate) >> 16);
        ret = checkfailed (strfmt("@SYS110217", dictTypeLocal.label()));


    }
    return ret;
}


Example - short version:
static void Job8(Args _args)
{
;
info(new dictType(typeId(ToDate) >> 16).label());
}



In Global Class:
public static LabelString aduTypeLabel(extendedTypeId _typeId)

{
;
return new dictType(_typeId >> 16).label();
}


Also (this example is a static method on ConfigTable):
static FieldLabel aduLabel()

{
;
return new SysDictType(extendedtypenum(ConfigId)).label();
}

num2str - decimals based on EDT

num2str function with the number of decimals based on the property of an Extended DataType

Code based on Mirko Bonello's work: http://dynamicsax-dev.blogspot.com/2009/02/getting-number-of-decimal-places-for.html

str num2strEdt(
    real _number,           //The real number to convert to a string
    int _character = 0,     //The minimum number of characters required in the text.
    ExtCodeValue _edt,      //The EDT to be used as basis for required number of decimal places.
    int _separator1 = 2,    //DecimalSeparator
    int _separator2 = 0)    //ThousandSeparator
{
    #DEFINE.AUTO('Auto')
    // http://www.rgagnon.com/pbdetails/pb-0181.html
    #DEFINE.LOCALE_USER_DEFAULT(1024)
    #DEFINE.LOCALE_ICURRDIGITS(25)

    #AOT
    #PROPERTIES
    #WinAPI // Used for regional settings

    TreeNode treeNode;
    int decimalPlaces;
    ;
    treeNode = infolog.findNode(#ExtendedDataTypesPath + '\\' + _edt);
    if (!treeNode)
        return strfmt("%1", _number);

    if (findproperty(treeNode.AOTgetProperties(),#PropertyNoOfDecimals) == #AUTO)
    {
      // get the number of decimals from the regional settings
      decimalPlaces = str2int((WinAPI::getLocaleInfo(#LOCALE_USER_DEFAULT,   #LOCALE_ICURRDIGITS)));
    }
    else
    {
      // get the number of decimals set by the developer in the property inspector
      decimalPlaces = str2int(findproperty(treeNode.AOTgetProperties(),#PropertyNoOfDecimals));
    }

    return num2str(_number, _character, decimalPlaces, _separator1, _separator2);
}

usage example:

info(strfmt("%1", num2strEdt(20.34, 0, (identifierstr(myEDT)))));

Table relation or Extended Data Type relation: which one is used?

Extended Data Type (EDT) definition:

Table Definition:

Field ADUEmplInventBuyerGroup.ItemBuyerGroupId  has ETD=ItemBuyerGroupId.

Table Browser for ADUEmplInventBuyerGroup: (in dutch)

When we right-click on field ItemBuyerGroupId > Go To Main Table Form.
Which table will be openened?
Will AX follow the EDT defined on the field and open table InventBuyerGroup?
Or will AX choose a table defined in the relations on ADUEmplInventBuyerGroup (InventBuyerGroup or VendTable) ?

The answer is:
AX always first looks at the relations defined on the table, and then on the EDT.
If however there is an ambiguous definition (= multiple relations are defined on the field), then AX follows the relation on the EDT.

In a flowchart: