函数参数TDataSet类型错误~~~
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs,DB,ADODB, Grids, DBGrids, StdCtrls;
type
TForm1 = class(TForm)
ADOConnection1: TADOConnection;
ADODataSet1: TADODataSet;
DataSource1: TDataSource;
DBGrid1: TDBGrid;
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
Function ColumnExists(DataSet:TDateSet;sColumn:String):Boolean;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
Function TForm1.ColumnExists(DataSet:TDateSet; sColumn:String):Boolean;
var
T:TField;
begin
T:=DataSet.FindField(sColumn);
if Assigned(T) then Result:=true else Result:=false;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
ADODataSet1.close;
ADODataSet1.CommandText:='select * from Dic_City';
ADODataSet1.Open;
if ColumnExists(ADODataSet1,'Code') then
showmessage('OK');
end;
end.
---------------------
ERROR:'Undeclared identifier:'TDataSet''
各位请帮忙,先谢过