Dynamics ax 2012 Form Field allow edit based on conditons

some times we may get requirements to make only some fields to be to allow edit on the form grid control.
Here are the few steps, which make is easy

1. Create a Form method as below

// This method is used to make fields editable based on conditions

public void setFieldAccess()
{
   if(XXXX == YYY)
   {
      FrmDataSource_ds.object(fieldNum(FrmDataSource,LineNum)).allowEdit(false);
   
      FrmDataSource_ds.object(fieldNum(FrmDataSource,Field2)).allowEdit(false);
    }
    //else
    //{
    //    FrmDataSource_ds.object(fieldNum(FrmDataSource,LineNum)).allowEdit(true);
        //    FrmDataSource_ds.object(fieldNum(FrmDataSource,Field2)).allowEdit(true);
        //}
}

2. Call the above method from the form Data source Active method after Super() as below

// to check record edit

public int active()
{
    int ret;
    ret = super();
    element. setFieldAccess();
    return ret;
}

tips：If you do it on a per-row basis you need to put an else

转自：http://axaptadevmallik.blogspot.com/2016/08/form-field-allow-edit-based-on-conditons.html?m=1