我是新手几个简单的问题[Error] Unit1.pas(24): Unsatisfied forward or external declaration: 'TForm1.Button2Click'
[Error] Unit1.pas(24): Unsatisfied forward or external declaration: 'TForm1.Button2Click'
还有[Fatal Error] Project2.dpr(5): Could not compile used unit 'Unit1.pas'
下面几条语句写到 ”button4.Enabled:=true;“时就出错了
谢谢各位大哥大姐帮帮我。unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DB, DBTables, StdCtrls, Mask, DBCtrls;type
TForm1 = class(TForm)
Label1: TLabel;
Label2: TLabel;
DBEdit1: TDBEdit;
DBEdit2: TDBEdit;
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
DataSource1: TDataSource;
T_student: TTable;
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure TForm1.FormCreate(Sender: TObject);
begin
T_student.Active:=true;//打开数据库表
end;procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
T_student.Active:=false;//关闭数据库表
end;procedure TForm1.Button1Click(Sender: TObject);
begin
if T_student.Bof then
begin
button1.Enabled:=false;//使按钮无效
end
else
begin
T_student.Prior;
button2.Enabled:=true;
button4.Enabled:=true;end;end
还有[Fatal Error] Project2.dpr(5): Could not compile used unit 'Unit1.pas'
下面几条语句写到 ”button4.Enabled:=true;“时就出错了
谢谢各位大哥大姐帮帮我。unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DB, DBTables, StdCtrls, Mask, DBCtrls;type
TForm1 = class(TForm)
Label1: TLabel;
Label2: TLabel;
DBEdit1: TDBEdit;
DBEdit2: TDBEdit;
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
DataSource1: TDataSource;
T_student: TTable;
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure TForm1.FormCreate(Sender: TObject);
begin
T_student.Active:=true;//打开数据库表
end;procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
T_student.Active:=false;//关闭数据库表
end;procedure TForm1.Button1Click(Sender: TObject);
begin
if T_student.Bof then
begin
button1.Enabled:=false;//使按钮无效
end
else
begin
T_student.Prior;
button2.Enabled:=true;
button4.Enabled:=true;end;end
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procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);--笨拉登,你的声明还在,而实现代码却被你删除,当然报错。把函数声明删除就可以了。新手上路,可以多找些基础的书看看,不过我觉得学语言,基本功还是要扎实!!
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);//删除掉
procedure Button3Click(Sender: TObject);//删除掉
procedure Button4Click(Sender: TObject);//删除掉