unit login;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls;type
TLoginForm = class(TForm)
Button1: TButton;
Button2: TButton;
Panel1: TPanel;
Label1: TLabel;
Label2: TLabel;
Name_Edit: TEdit;
Password_Edit: TEdit;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
LoginForm: TLoginForm;implementationuses Main ,DBTables ;
{$R *.dfm}procedure TLoginForm.Button1Click(Sender: TObject);
var
aname,apassword,sqlstr:string;
a,b:integer;
begin
//有输入时,从数据库中检验用户信息
if(Length(Trim(Name_Edit.Text))>0)or(Length(Trim(Password_Edit.Text))>0)then
begin
aname:=Trim(Name_Edit.Text);
apassword:=Trim(Password_Edit.Text);
sqlstr:='select * from t_user a,t_qxb b where (a.username='''+aname+''') and(a.userpass='''+apassword+''')and(a.username=b.username) order by b.cdbh'; with TQuery.Create(nil)do
try
Close;
SessionName:=MaimFrom.Datebase1.SessionName;
DatebaseName:=MaimForm.Datebase1.DatebaseName;
SQL.Clear;
SQL.Add(sqlstr);
Open;
if RecordCount>0 then
//验证通过,根据权限设置菜单项的可访问性
begin
First;
while not Eof do
begin
a;=StrToInt(Copy(FieldByName('cdx').AsString,1,1));
b;=StrToInt(Copy(FieldByName('cdx').AsString,2,2));
MainForm.MainMenu1.Items.Items[a].Visible:=Ture;
MainForm.MainMenu1.Items.Items[a].Items[b]Visible:=Ture;
Next;
end;
//验证不通过,提示错误信息
begin
ShowMessage('请确认登陆的用户名和密码是否正确!');
Name_Edit.SetFocus;
Name_Edit.SelectAll;
end;
finally
Free;
end;
end
else
//无输入,提示错误信息
begin
ShowMessage('请输入登录用户名和密码!');
Name_Edit.SelectAll;end;end.---
Undeclared identifier :'Maim'开始出错
开始不是uses他了吗???、
拜托哪位高手帮忙 辛苦了
着急~明天交- - 好吧 我很欠……
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls;type
TLoginForm = class(TForm)
Button1: TButton;
Button2: TButton;
Panel1: TPanel;
Label1: TLabel;
Label2: TLabel;
Name_Edit: TEdit;
Password_Edit: TEdit;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
LoginForm: TLoginForm;implementationuses Main ,DBTables ;
{$R *.dfm}procedure TLoginForm.Button1Click(Sender: TObject);
var
aname,apassword,sqlstr:string;
a,b:integer;
begin
//有输入时,从数据库中检验用户信息
if(Length(Trim(Name_Edit.Text))>0)or(Length(Trim(Password_Edit.Text))>0)then
begin
aname:=Trim(Name_Edit.Text);
apassword:=Trim(Password_Edit.Text);
sqlstr:='select * from t_user a,t_qxb b where (a.username='''+aname+''') and(a.userpass='''+apassword+''')and(a.username=b.username) order by b.cdbh'; with TQuery.Create(nil)do
try
Close;
SessionName:=MaimFrom.Datebase1.SessionName;
DatebaseName:=MaimForm.Datebase1.DatebaseName;
SQL.Clear;
SQL.Add(sqlstr);
Open;
if RecordCount>0 then
//验证通过,根据权限设置菜单项的可访问性
begin
First;
while not Eof do
begin
a;=StrToInt(Copy(FieldByName('cdx').AsString,1,1));
b;=StrToInt(Copy(FieldByName('cdx').AsString,2,2));
MainForm.MainMenu1.Items.Items[a].Visible:=Ture;
MainForm.MainMenu1.Items.Items[a].Items[b]Visible:=Ture;
Next;
end;
//验证不通过,提示错误信息
begin
ShowMessage('请确认登陆的用户名和密码是否正确!');
Name_Edit.SetFocus;
Name_Edit.SelectAll;
end;
finally
Free;
end;
end
else
//无输入,提示错误信息
begin
ShowMessage('请输入登录用户名和密码!');
Name_Edit.SelectAll;end;end.---
Undeclared identifier :'Maim'开始出错
开始不是uses他了吗???、
拜托哪位高手帮忙 辛苦了
着急~明天交- - 好吧 我很欠……
没细看代码。
找对这个错误了 一激动写错了- - 跟没找到一样
谢谢两位大大提醒 我对这个根本不会 第一次接触- - 代码都是找书上凑得
错误的地方比较低级 真是辛苦了T T~
现在的问题变成
Undeclared identifier :Datebase1了
Datebase1我是main主界面里面的
如果可以的话能不能拜托加Q教我下 很简单的程序 如果您时间范围容许的话~
beginend;
//实现续借功能
procedure Tjygl_Form.N3Click(Sender: TObject);
var id,sqlstr,jsrq:string;
begin
id:=Query1.FieldByName('id').AsString;
jsrq:=
sqlstr:= 'update t_jyb set jsrq='''+jsrq+''' where id='''+id+'''';
if MessageDlg('确认要续借该书吗',mtConfirmation,[mbYes,mbNo],0)=mrYes then
begin
with TQuery.Create(nil)do
begin
try
Close;
SessionName:=MainForm.Database1.SessionName;
DatabaseName:=MainForm.Database1.DatabaseName;
SQL.Clear;
SQL.Add(sqlstr);
ExecSQL;
finally
Free;
end;
end;
cmdOK.Click; end;
end;
//删除借阅信息procedure Tjygl_Form.N4Click(Sender: TObject);
var id,sqlstr,jsrq:string;
begin
id:=Query1.FieldByName('id').AsString;
//jsrq:=MainForm.getnettime;
sqlstr:='update t_jyb set jsrq='''+jsrq+'''where(id='''+id+''')';
if MessageDlg('确认删除选中记录吗',mtConfirmation,[mbYes,mbNo],0)=mrYes then
begin
with TQuery.Create(nil)do
begin
try
Close;
SessionName:=MainForm.Database1.SessionName;
DatabaseName:=MainForm.Database1.DatabaseName;
SQL.Clear;
SQL.Add('delete from t_csb where id='''+id+'''');
ExecSQL;
finally
Free;
end;
end;
cmdOK.Click;
end;
end;
end.错误left side cannot be assigned to
statment expected,but expression of type'string found'