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missing parameter type

Posted on 2001-08-12
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Last Modified: 2007-12-19
Hi,

Got a missing parameter type for this function below:
function GetDataType(Table1.FieldDefs[i].DataType:string):TFieldType ;

Any suggestions?
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Question by:rhapsody7
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1 Comment
 
LVL 21

Accepted Solution

by:
gemarti earned 5 total points
ID: 6377591
I don't think you can convert a datatype to a string.

Try this:

place a datasource, table, button and a standard listbox on a form

attach the table to a database and link the datasource then run this application:

NOTE: Since this q is only worth 5 points I am not including all of the datatypes available in this code. You'll have to do that yourself:

--------------cut below this line--------------------------

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, DB, DBTables, DBCtrls, Mask, ExtCtrls;

type
  TForm1 = class(TForm)
    DataSource1: TDataSource;
    Table1: TTable;
    Button1: TButton;
    ListBox1: TListBox;
    procedure FormActivate(Sender: TObject);
    procedure ListBox1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}


procedure TForm1.FormActivate(Sender: TObject);
var
  i : integer;
begin
  for i := 0 to Table1.FieldList.Count -1 do
    //begin
      ListBox1.Items.Add(Table1.FieldList.Strings[i]);
    //end;
end;

procedure TForm1.ListBox1Click(Sender: TObject);
var
  Fname : String;
  i : Integer;
begin
  i := ListBox1.ItemIndex;
  Fname := ListBox1.Items.Strings[i];
  Case Table1.Fields.FieldByName(FName).DataType of
  ftUnknown: ShowMessage('FtUnknown: Unknown or undetermined');
  ftString: ShowMessage('ftString: Character or string field');
  ftSmallint: ShowMessage('ftSmallInt: 16-bit integer field');
  ftInteger: ShowMessage('ftInteger: 32-bit integer field');
  ftWord: ShowMessage('ftWord: 16-bit unsigned integer field');
  ftBoolean: ShowMessage('ftBoolean: Boolean field');
  ftFloat: ShowMessage('ftFloat: Floating-point numeric field');
  ftCurrency: ShowMessage('ftCurrency: Money field');
  ftBCD: ShowMessage('ftBCD: Binary-Coded Decimal field that can be converted to Currency type without a loss of precision.');
  ftDate: ShowMessage('ftDate: Date field');
  ftTime: ShowMessage('ftTime: Time field');
  ftDateTime: ShowMessage('ftDateTime: Date and time field');
end;

end.
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