Dynamics AX form requires an active buffer

At the start of my Dynamics AX development learning, I received the error "Dynamics AX form requires an active buffer" many times whenever I tried to open a second level of form (child form). The reason is that I was not submitting the required parameter values for it.

To open second level of form, you have to mention the name of the caller form (parent form). The best example is Production Order's Picking List form. To open the "Production Journal Lines" sub-form within Picking List form, first create the Picking List form instance and open it, next create the "Production Journal Lines" form instance and set the "Caller" property with Picking List form instance.

Here is the code for above explanation: -

        Args                    argsForm;
        FormRun             formRun;
        FormRun             subformRun;
        ;
     

Get control and control value in Dynamics AX form

With Dynamics AX 2012, accessing form's controls and their values is not very difficult, like in previous versions. You can access control object in code behind either dynamically as well as statically.

If you have a StringEdit control on your form with name "StringEdit_ShiftCode", you can access it through code in the following way: -

//define name for the control 

#define.ctrlShiftCode('StringEdit_ShiftCode')

//declare and define control.

FormStringControl shiftCode = this.form().design().control(#ctrlShiftCode);

Now you can get every property and methods for this control, like, shiftCode.text().

This is good if you have a dynamics form and controls. But if you have a static form then you can get the form's controls directly by names. For example, if you have a StringEdit control with name "StringEdit_ShiftCode" then change this control's AutoDeclaration property to 'Yes'. Now you can access this control's properties directly by specifying its name.Here is its example: -

str shiftCodeValue = StringEdit_ShiftCode.text();