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MSSQL field not seen when trying to populate TStringGrid

Posted on 2007-03-20
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Last Modified: 2013-11-23
I am populating a TStringGrid with a single row of data from an MS SQL table. It finds the row and gets stuck when looking at a certain field. Delphi claims it does not exist when I run the app.

Below is the code:
procedure TfrmStudentOrders.FormCreate(Sender: TObject);
var
intRow : Integer;
begin
  if Length(frmNewStudentSelect.EditStudentID.Text) > 0 then
  begin
  //If student exists, i'll do all this
    QuerySelectOrders.SQL.Clear;
    QuerySelectOrders.SQL.Add('SELECT * FROM order_details_tbl WHERE student_id = '''+frmNewStudentSelect.EditStudentID.Text+'''');
    QuerySelectOrders.Open;
    StringGridOrders.RowCount := QuerySelectOrders.RecordCount + 1;
    intRow := 1;
    while not QuerySelectOrders.EoF do
    begin
      StringGridOrders.Cells[0,intRow] := QuerySelectOrders.FieldByName('order_id').AsString;
      StringGridOrders.Cells[1,intRow] := QueryselectOrders.FieldByName('date_in').AsString;
      StringGridOrders.Cells[2,intRow] := QueryselectOrders.FieldByName('due_out').AsString;
      StringGridOrders.Cells[3,intRow] := QuerySelectOrders.FieldByName('build_number').AsString;
      StringGridOrders.Cells[4,intRow] := QuerySelectOrders.FieldByName('sherlock_number').AsString;
      StringGridOrders.Cells[5,intRow] := QuerySelectOrders.FieldByName('yellow_number').AsString;
      QuerySelectOrders.Next;
      inc(intRow);
    end
  end
  else
etc...


It claims "build_number" does not exist, and also "yellow_number" and "sherlock_number" do not contain any information, although all 3 do contain data.

They are nvarchar fields.

Any ideas?
0
Comment
Question by:wbstech
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2 Comments
 
LVL 17

Accepted Solution

by:
mokule earned 2000 total points
ID: 18757590
Are You using BDE?
BDE has problems with nvarchar fields.
I'm no sure if it was ever repaired.
use varchar fields if possible.
If not switch to ADO
0
 
LVL 4

Author Comment

by:wbstech
ID: 18762447
Changed to varchar, problem solved. Thanks!
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