具体情况是这样的,我想添加一个函数newll实现刷新query1.可是老是报错-----unsatisfied forward or txternal declaration:'tform2.newll'
如果我将声明中的procedure newll;改成procedure form2.newll;又会提示说
except' ='but';'found in form2 请问这是为什么啊?
再就是函数体newll中,输入query1.后也不会出现自动提示下来菜单?
具体代码如下:
前辈请指教啊interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, DB, DBTables, Grids, DBGrids;type
TForm2 = class(TForm)
DBGrid1: TDBGrid;
query1: TQuery;
DataSource1: TDataSource;
Edit1: TEdit;
Edit2: TEdit;
Button1: TButton;
Button2: TButton;
Label1: TLabel;
Label2: TLabel;
procedure newll;///声明
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject); private
{ Private declarations } public
{ Public declarations }
end;var
Form2: TForm2;implementation{$R *.dfm}
procedure newll;//函数体
begin
form2.query1.close;
form2.query1.SQL.Clear;
form2.query1.sql.add('select [user] from [user]');
form2.query1.open;
end;
procedure TForm2.Button1Click(Sender: TObject);
var yhm,mm,sqlstr:string;
begin
yhm:=trim(edit1.Text);
mm:=trim(edit2.Text);
if length(yhm)<1 then
showmessage('the ID is empty');
if length(mm)<1 then
showmessage('the password is empty');
if (length(yhm)>0) and (length(mm)>0) then
begin
sqlstr:='select * from [user] where ([user]='''+yhm+''')';
with tquery.Create(nil) do
try
databasename:='whs';
close;
sql.Clear;
sql.Add(sqlstr);
open;
if recordcount>0 then
showmessage('the ID has been registered pleasse choose another')
else
begin
sqlstr:='insert into [user] values('''+yhm+''','''+mm+''')';
close;
sql.Clear;
sql.Add(sqlstr);
open;
showmessage('the ID is added');
form2.newll;//函数调用
end;
finally
free;
end;
end;
end;
procedure TForm2.Button2Click(Sender: TObject);
begin
close;
end;end.
如果我将声明中的procedure newll;改成procedure form2.newll;又会提示说
except' ='but';'found in form2 请问这是为什么啊?
再就是函数体newll中,输入query1.后也不会出现自动提示下来菜单?
具体代码如下:
前辈请指教啊interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, DB, DBTables, Grids, DBGrids;type
TForm2 = class(TForm)
DBGrid1: TDBGrid;
query1: TQuery;
DataSource1: TDataSource;
Edit1: TEdit;
Edit2: TEdit;
Button1: TButton;
Button2: TButton;
Label1: TLabel;
Label2: TLabel;
procedure newll;///声明
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject); private
{ Private declarations } public
{ Public declarations }
end;var
Form2: TForm2;implementation{$R *.dfm}
procedure newll;//函数体
begin
form2.query1.close;
form2.query1.SQL.Clear;
form2.query1.sql.add('select [user] from [user]');
form2.query1.open;
end;
procedure TForm2.Button1Click(Sender: TObject);
var yhm,mm,sqlstr:string;
begin
yhm:=trim(edit1.Text);
mm:=trim(edit2.Text);
if length(yhm)<1 then
showmessage('the ID is empty');
if length(mm)<1 then
showmessage('the password is empty');
if (length(yhm)>0) and (length(mm)>0) then
begin
sqlstr:='select * from [user] where ([user]='''+yhm+''')';
with tquery.Create(nil) do
try
databasename:='whs';
close;
sql.Clear;
sql.Add(sqlstr);
open;
if recordcount>0 then
showmessage('the ID has been registered pleasse choose another')
else
begin
sqlstr:='insert into [user] values('''+yhm+''','''+mm+''')';
close;
sql.Clear;
sql.Add(sqlstr);
open;
showmessage('the ID is added');
form2.newll;//函数调用
end;
finally
free;
end;
end;
end;
procedure TForm2.Button2Click(Sender: TObject);
begin
close;
end;end.
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begin
form2.query1.close;
form2.query1.SQL.Clear;
form2.query1.sql.add('select [user] from [user]');
form2.query1.open;
end;
改为
procedure TForm2.newll;//函数体
begin
form2.query1.close;
form2.query1.SQL.Clear;
form2.query1.sql.add('select [user] from [user]');
form2.query1.open;
end;
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, DB, DBTables, Grids, DBGrids;type
TForm2 = class(TForm)
DBGrid1: TDBGrid;
query1: TQuery;
DataSource1: TDataSource;
Edit1: TEdit;
Edit2: TEdit;
Button1: TButton;
Button2: TButton;
Label1: TLabel;
Label2: TLabel;
procedure newll;///声明
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject); private
{ Private declarations } public
procedure newll;
{ Public declarations }
end;var
Form2: TForm2;implementation{$R *.dfm}
procedure TForm2.newll;//函数体
begin
query1.close;
query1.SQL.Clear;
query1.sql.add('select [user] from [user]');
query1.open;
end;
procedure TForm2.Button1Click(Sender: TObject);
var yhm,mm,sqlstr:string;
begin
yhm:=trim(edit1.Text);
mm:=trim(edit2.Text);
if length(yhm)<1 then
showmessage('the ID is empty');
if length(mm)<1 then
showmessage('the password is empty');
if (length(yhm)>0) and (length(mm)>0) then
begin
sqlstr:='select * from [user] where ([user]='''+yhm+''')';
with tquery.Create(nil) do
try
databasename:='whs';
close;
sql.Clear;
sql.Add(sqlstr);
open;
if recordcount>0 then
showmessage('the ID has been registered pleasse choose another')
else
begin
sqlstr:='insert into [user] values('''+yhm+''','''+mm+''')';
close;
sql.Clear;
sql.Add(sqlstr);
open;
showmessage('the ID is added');
form2.newll;//函数调用
end;
finally
free;
end;
end;
end;
procedure TForm2.Button2Click(Sender: TObject);
begin
close;
end;end.
procedure TForm2.Button1Click(Sender: TObject);
var yhm,mm,sqlstr:string;
begin
yhm:=trim(edit1.Text);
mm:=trim(edit2.Text);
if length(yhm)<1 then
showmessage('the ID is empty');
if length(mm)<1 then
showmessage('the password is empty');
if (length(yhm)>0) and (length(mm)>0) then
begin
sqlstr:='select * from [user] where ([user]='''+yhm+''')';
with tquery.Create(nil) do
try
databasename:='whs';
close;
sql.Clear;
sql.Add(sqlstr);
open;
if recordcount>0 then
showmessage('the ID has been registered pleasse choose another')
else
begin
sqlstr:='insert into [user] values('''+yhm+''','''+mm+''')';
close;
sql.Clear;
sql.Add(sqlstr);
open;
showmessage('the ID is added');
form2.newll;//函数调用
end;
finally
free;
end;
end;
end;改为
procedure TForm2.Button1Click(Sender: TObject);
var yhm,mm,sqlstr:string;
begin
yhm:=trim(edit1.Text);
mm:=trim(edit2.Text);
if length(yhm)<1 then
showmessage('the ID is empty');
if length(mm)<1 then
showmessage('the password is empty');
if (length(yhm)>0) and (length(mm)>0) then
begin
sqlstr:='select * from [user] where ([user]='''+yhm+''')';
with tquery.Create(nil) do
try
databasename:='whs';
close;
sql.Clear;
sql.Add(sqlstr);
open;
if recordcount>0 then
showmessage('the ID has been registered pleasse choose another')
else
begin
sqlstr:='insert into [user] values('''+yhm+''','''+mm+''')';
close;
sql.Clear;
sql.Add(sqlstr);
ExecSQL; //改这句
showmessage('the ID is added');
form2.newll;//函数调用
end;
finally
free;
end;
end;
end;