Re: 'Could not convert variant of type (Null) into type (String)'

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#639

From: Vladimir Stefanovic
Date: Fri, 13 Jan 2006 17:04

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> Thanks a lot. It`s works.Thank you, thank you,
> thank you;-).

Great :)


> What`s the name of property where i adding all fields
> from my table(just like tou say)?

Sorry, can you be more speciffic?

(You just add the fields at design-time, and you do not need
anything else with them at run-time)

In fact you can make an app without adding those fields at all
but you may experience some difficulties, as you already noticed.


> How I can do it from application code?Any function or
> somethink?

Why do you need that?

I suppose that you can do something like this:

--- example from BCB6 help (for SQLDataSet, but must be the
similar for ADO) ---

SQLDataSet1->Close();

TFloatField *T = new TFloatField(SQLDataSet1);
T->Precision = 2;
T->FieldName = "Amount";
T->Name = SQLDataSet1->Name + T->FieldName;
T->Index = SQLDataSet1->FieldCount;
T->DataSet = SQLDataSet1;
SQLDataSet1->FieldDefs->UpDate();
SQLDataSet1->Open();

But yiu do not need that at all.



-- 
Best regards,
Vladimir Stefanovic

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