Event handlers and post handlers in D365

Event handlers and post handlers in D365


Shankar Das
 Shankar Das   
 on 23 Mar 2018 2:03 PM 


Let’s discuss today, how to get the table buffers, form control values, class parameters and method arguments etc., while writing our own event-handlers in D365. I’ll elaborate this using example code snippets in this post. There are already very useful posts on this topic you can look into. Here I required these event handlers while doing customization in Item master.
Form data source event handler


 [FormDataSourceEventHandler(formDataSourceStr(EcoResProductDetailsExtended, InventTable), FormDataSourceEventType::Written)]
public static void InventTable_OnWritten(FormDataSource sender, FormDataSourceEventArgs e){
    FormRun                 form           = sender.formRun();
    FormDataSource          InventTable_ds =       form.dataSource(formDataSourceStr(EcoResProductDetailsExtended,InventTable)) as FormDataSource;
   InventTable             inventTable    = InventTable_ds.cursor();
}


Form event handler
Table Buffer on form closing event


[FormEventHandler(formStr(EcoResAttributeValue), FormEventType::Closing)]
public static void EcoResAttributeValue_OnClosing(xFormRun sender, FormEventArgs e)
{
     FormDataSource ecoResProduct_ds   =          sender.dataSource(formDataSourceStr(EcoResAttributeValue, EcoResProductAttributeValue));
      EcoResProductAttributeValue      ecoResAttributeValue = ecoResProduct_ds.cursor();
}   



Control value and form event level for which auto declaration must be set true


[FormControlEventHandler(formControlStr(EcoResProductCreate, OKButton), FormControlEventType::Clicked)]
public static void OKButton_OnClicked(FormControl sender, FormControlEventArgs e)
{
       FormRun             element       = sender.formRun();
       //form control
       FormControl         modelGroupRef = element.design(0).controlName("ModelGroupId");
        Info(strfmt(“Model Group %1”, modelGroupRef.valueStr()));
       //form parameter
       ItemId              itemId        = element.parmItemId();
}


Post handler for class method


[PostHandlerFor(classStr(EcoResProductReleaseManager), methodStr(EcoResProductReleaseManager, release))]
public static void EcoResProductReleaseManager_Post_release(XppPrePostArgs args){
     EcoResProductReleaseManager releaseMgr;
    //Getting the class object
    releaseMgr     = args.getThis();
   //Getting the class parameter
   ItemId itemId  = releaseMgr.parmItemId();
   //Getting the method argument
    boolean itemCreation = args.getArg("_isCreation");
}


Post handler for overriding table methods modified field and validate Write


[PostHandlerFor(tableStr(InventTable), tableMethodStr(InventTable, validateWrite))]
public static void InventTable_Post_validateWrite(XppPrePostArgs args)
{
      InventTable inventTable = args.getThis() as InventTable
      boolean ret = true;
      // Override the validations here and set the return value accordingly.
       Args.setReturnValue(ret);
}


[PostHandlerFor(tableStr(InventTable), tableMethodStr(InventTable, modifiedField))]
public static void InventTable_Post_modifiedField(XppPrePostArgs args)
{
        //Getting the table buffer
        InventTable inventTable = args.getThis() as InventTable
       //Getting the field id method argument.
        FieldId fieldModified = args.getArg("_fieldId");
        switch (fieldModified)
        {
            //Here you can write your logic on modified field method
                break;
        }
}