StrataFrame Forum » StrataFrame Application Framework - V1 » WinForms (How do I?) » How to instantiate Child Object

How to instantiate Child Object

Ger Cannoll — Mon, 20 Feb 2012 16:07:45 GMT

I have the following code in my Parent BusinessObject Vlaidation to ensure that at least one Child is entered.... works fine from my main Parent/Child data entry form

ChildBO myChildBO = (ChildBO)this.ChildBusinessObjects[0];

if (myChildBO.Count <= 0) { this.AddBrokenRule(this.ITR_CUSREF, "There must be at least one Detail Line"); }

Now , on a different form, where I am updating just one field from the Parent Business object, the MyParent.Save() gives an index error, probably because the Child BO is not instantiated. On this partcular form , the Child BI is not used at all.

How do I 'Instantiate' and populate the child Business Object in Code , so that the error does not happen

(I have tried the folloiwng code, but not quite sure what it does...got from another thread)

BusinessParentRelationship myRel = new BusinessParentRelationship();
myRel.ForeignKeyField = new string[] { "IDE_ITRPK" };
myRel.ParentPrimaryKeyField = new string[] {"ITR_PK"};
myRel.ParentBusinessObjectType = "ITR";
ChildBO1.ParentRelationship = myRel;
ChildBO1.IdeFillByItrpk(itrBO1.ITR_PK);

RE: How to instantiate Child Object

Edhy Rijo — Mon, 20 Feb 2012 16:07:45 GMT

You are welcome Gerard.

RE: How to instantiate Child Object

Ger Cannoll — Mon, 20 Feb 2012 15:02:01 GMT

Hi Edhy. Thanks for replying.

That has done the trick....many thanks

Regards,

Gerard

RE: How to instantiate Child Object

Edhy Rijo — Mon, 20 Feb 2012 10:05:04 GMT

Hi Gerard,

[quote][b]Ger Cannoll (2/20/2012)[/b][hr]How do I 'Instantiate' and populate the child Business Object in Code , so that the error does not happen [/quote]
Instead of trying to create a child bo that do not exist, modify your code to test if the ChildBusinessObjects.Count > 0