delphi dm.ADOQuery1:missing SQL property

来源：百度知道 编辑：UC知道 时间：2024/05/15 11:38:45
我做的是个登陆框
请达人指点那里有问题
interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type
TForm2 = class(TForm)
GroupBox1: TGroupBox;
RadioButton1: TRadioButton;
RadioButton2: TRadioButton;
GroupBox2: TGroupBox;
Label1: TLabel;
Label2: TLabel;
Edit1: TEdit;
Edit2: TEdit;
Button1: TButton;
Button2: TButton;

procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form2: TForm2;
m:integer;
czy:string;
s:boolean;
implementation
uses
Unit1;
{$R *.dfm}

procedure TForm2.Button2Click(Sender: TObject);
begin
close;
end;

procedure TForm2.Button1Click(Sen

记住：在ADOquery.open前一定确保它的SQL中有语句。就是这个原因。
Button1的Click事件中有几处明显就是这个原因了。

dm.ADOQuery1.close;
dm.ADOQuery1.open;

有两处这个去掉试下，因为提示的信息显示ADOQuery1的SQL属性未设置，大概只有这个地方可以引起这个问题了