unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, jpeg, ExtCtrls, ADODB, DB;type TForm1 = class(TForm) Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
edtpassword: TEdit;
btnOK: TButton;
Button2: TButton;
Image1: TImage;
cmbUsername: TComboBox;
procedure btnOKClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementationuses Unit2;{$R *.dfm}procedure TForm1.btnOKClick(Sender: TObject); var
Query: TADOQuery;
begin
try
Query:= TADOQuery.Create(nil);
Query.Connection:= dmPer.acPer; //dmPer.acPer是公共的数据库连接对象
Query.SQL.Add('select * from Operator where UserName =:UseName and UserPwd =:userpwd');
Query.Parameters.ParamByName('UserName').Value:= cmbUsername.Text;
Query.Parameters.ParamByName('userpwd').Value := edtpassword.Text;
Query.Open;
if Query.RecordCount = 0 then begin
MessageDlg('请输入正确的用户名和密码',mtError,[mbok],0);
Exit;
end;
end;end.一个登录界面,错误提示:
55行:EXCEPT or FINALLY expected
57:';'expected but '.' found
59: delclaration expect but end of file found
[Fatal Error]Project.dpr[7]:Could compile used unit'Unit.pas'
转来转去好象就是end 的问题,请问要做什么修改?谢谢
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, jpeg, ExtCtrls, ADODB, DB;type TForm1 = class(TForm) Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
edtpassword: TEdit;
btnOK: TButton;
Button2: TButton;
Image1: TImage;
cmbUsername: TComboBox;
procedure btnOKClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementationuses Unit2;{$R *.dfm}procedure TForm1.btnOKClick(Sender: TObject); var
Query: TADOQuery;
begin
try
Query:= TADOQuery.Create(nil);
Query.Connection:= dmPer.acPer; //dmPer.acPer是公共的数据库连接对象
Query.SQL.Add('select * from Operator where UserName =:UseName and UserPwd =:userpwd');
Query.Parameters.ParamByName('UserName').Value:= cmbUsername.Text;
Query.Parameters.ParamByName('userpwd').Value := edtpassword.Text;
Query.Open;
if Query.RecordCount = 0 then begin
MessageDlg('请输入正确的用户名和密码',mtError,[mbok],0);
Exit;
end;
end;end.一个登录界面,错误提示:
55行:EXCEPT or FINALLY expected
57:';'expected but '.' found
59: delclaration expect but end of file found
[Fatal Error]Project.dpr[7]:Could compile used unit'Unit.pas'
转来转去好象就是end 的问题,请问要做什么修改?谢谢
Query: TADOQuery;
begin
try
Query:= TADOQuery.Create(nil);
Query.Connection:= dmPer.acPer; //dmPer.acPer是公共的数据库连接对象
Query.SQL.Add('select * from Operator where UserName =:UseName and UserPwd =:userpwd');
Query.Parameters.ParamByName('UserName').Value:= cmbUsername.Text;
Query.Parameters.ParamByName('userpwd').Value := edtpassword.Text;
Query.Open;
if Query.RecordCount = 0 then begin
MessageDlg('请输入正确的用户名和密码',mtError,[mbok],0);
Exit;
end;
except
on E:Exception do
begin
showmessage(E.Message);
end;
end;
end;try
.......
exceptendortry
.......
finallyend
后面的错误均是缺少“EXCEPT or FINALLY ”引起的。
procedure TForm1.btnOKClick(Sender: TObject);
var
Query: TADOQuery;
begin
try{你设置了异常处理,要不去掉try,要不就添加异常处理代码}
Query:= TADOQuery.Create(nil);
Query.Connection:= dmPer.acPer; //dmPer.acPer是公共的数据库连接对象
Query.SQL.Add('select * from Operator where UserName =:UseName and UserPwd =:userpwd');
Query.Parameters.ParamByName('UserName').Value:= cmbUsername.Text;
Query.Parameters.ParamByName('userpwd').Value := edtpassword.Text;
Query.Open;
if Query.RecordCount = 0 then
begin
MessageDlg('请输入正确的用户名和密码',mtError,[mbok],0);
Exit;
end;
except
showmessage('系统出错了!');
end;
end;