extension of the standard form updatedesign()

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Posted on by dark_knight

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Hello,

I have added a custom control LogisticsPostalAddress_WarehouseOnly to the standard form LogisticsPostalAddress by means of the form extension. Then I'd like to extend the standard form method updateDesign() like that

1st approach



[ExtensionOf(formstr(LogisticsPostalAddress))]
public final class LogisticsPostalAddressForm_Extension
{
    public void updateDesign()
    {
        FormBuildDesign formBuildDesign = this.form().design();
        FormBuildCheckBoxControl wareHouseOnlyCBCtrl;

        wareHouseOnlyCBCtrl = formBuildDesign.control('LogisticsPostalAddress_WarehouseOnly');

        next updateDesign();

        switch (callerTableId)
        {
            case tableNum(CustTable):
                wareHouseOnlyCBCtrl.visible(true);
                break;
        }
    }

}

2nd approach. I put Autodeclaraton property of my custom control to Yes



ExtensionOf(formstr(LogisticsPostalAddress))]
public final class LogisticsPostalAddressForm_Extension
{
    public void updateDesign()
    {
        next updateDesign();

        switch (callerTableId)
        {
            case tableNum(CustTable):
                LogisticsPostalAddress_WarehouseOnly.visible(true);
                break;
        }
    }

}

IN the 1st approach on this line I get null object reference on this line because control object wareHouseOnlyCBCtrl doesn't come. It's null. It's not fetched. formBuildDesign object is initialised and looks good.

wareHouseOnlyCBCtrl = formBuildDesign.control('LogisticsPostalAddress_WarehouseOnly');

the same goes with 2nd approach

How can I fix this please or what I'm mixing up?

Thank you.

Categories:

Microsoft Dynamics AX

Dynamics 365 Finance

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Verified answer

Waed Ayyad 9,133 Super User 2026 Season 1 on at

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Hi @dark_knight

Try the following code:

[ExtensionOf(formstr(LogisticsPostalAddress))] public final class LogisticsPostalAddressForm_Extension { public void updateDesign() { FormRun formRun = this; FormCheckBoxControl wareHouseOnlyCBCtrl = formRun.design().controlname(formControlStr(LogisticsPostalAddress, YourCheckBoxName)) as FormCheckBoxControl ; next updateDesign(); switch (callerTableId) { case tableNum(CustTable): wareHouseOnlyCBCtrl.visible(true); break; } } }

Thanks,

Waed Ayyad

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Verified answer

Martin Dráb 239,399 Most Valuable Professional on at

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Referring to the control by name is much simpler (and it doesn't even need Auto Declaration) and safer, therefore I don't see any reason why you would like to use the complicated approach with FormBuildDesign.

Note that each of your examples uses a different control name - which one is correct? Maybe using a wrong name is your actual bug.

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