Question

TADOQuery Parameter

Asked by: gms2702

I am using a TADOQuery in Delphi 5.

Parameters.ParamByName( 'Addr2'    ).Value    := ClientQuery.FieldByName( 'CL_ADDR2'   ).AsString;

If 'CL_ADDR2' is a blank string then I get the following error.

Error : Parameter object is improperly defined. Inconsistent or incomplete information was provided.

I need to cater for a blank string.  Can anyone provide a solution ?

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Asked On
2005-12-07 at 08:49:24ID21656520
Tags

tadoquery

,

parameter

,

delphi

Topic

Delphi Programming

Participating Experts
2
Points
200
Comments
4

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Answers

 

by: RickJPosted on 2005-12-07 at 16:10:51ID: 15441193

What about this..

if ClientQuery.FieldByName( 'CL_ADDR2'   ).AsString = '' then
  Parameters.ParamByName( 'Addr2'    ).Value :=  Null
else
  Parameters.ParamByName( 'Addr2'    ).Value    := ClientQuery.FieldByName( 'CL_ADDR2'   ).AsString;

I have not tested but I think it should work.

 

by: pcsentinelPosted on 2005-12-15 at 01:05:19ID: 15488907

Not necessarily Null, the field may contain an empty string,

If the Query you are calling requires an blank string but the field you are assigning to it is null then mopdifying RickJ's code a bit try

if ClientQuery.FieldByName( 'CL_ADDR2'   ).IsNull then
  Parameters.ParamByName( 'Addr2'    ).Value :=  ''
else
  Parameters.ParamByName( 'Addr2'    ).Value    := ClientQuery.FieldByName( 'CL_ADDR2'   ).AsString;

it depends on what ClientQuery is feeding and what the other query is requiring

regards

20120131-EE-VQP-002

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