如何在inputbox中输入以‘*’形式显示的密码? 请写得详细些,最好以代码形式说明。我上网查了一些,虽然按照帖子上面的说法改了,可仍然不好使。拜托大家了! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 function InputQuery(const ACaption, APrompt: string; var Value: string): Boolean;var Form: TForm; Prompt: TLabel; Edit: TEdit;//改成 MaskEdit1: TMaskEdit; DialogUnits: TPoint; ButtonTop, ButtonWidth, ButtonHeight: Integer;begin Result := False; Form := TForm.Create(Application); with Form do try Canvas.Font := Font; DialogUnits := GetAveCharSize(Canvas); BorderStyle := bsDialog; Caption := ACaption; ClientWidth := MulDiv(180, DialogUnits.X, 4); Position := poScreenCenter; Prompt := TLabel.Create(Form); with Prompt do begin Parent := Form; Caption := APrompt; Left := MulDiv(8, DialogUnits.X, 4); Top := MulDiv(8, DialogUnits.Y, 8); Constraints.MaxWidth := MulDiv(164, DialogUnits.X, 4); WordWrap := True; end; Edit := TEdit.Create(Form);//改成 MaskEdit1 with Edit do ///改成 MaskEdit1 begin Parent := Form; Left := Prompt.Left; Top := Prompt.Top + Prompt.Height + 5; Width := MulDiv(164, DialogUnits.X, 4); MaxLength := 255; Text := Value; SelectAll; end; ButtonTop := Edit.Top + Edit.Height + 15; ButtonWidth := MulDiv(50, DialogUnits.X, 4); ButtonHeight := MulDiv(14, DialogUnits.Y, 8); with TButton.Create(Form) do begin Parent := Form; Caption := SMsgDlgOK; ModalResult := mrOk; Default := True; SetBounds(MulDiv(38, DialogUnits.X, 4), ButtonTop, ButtonWidth, ButtonHeight); end; with TButton.Create(Form) do begin Parent := Form; Caption := SMsgDlgCancel; ModalResult := mrCancel; Cancel := True; SetBounds(MulDiv(92, DialogUnits.X, 4), Edit.Top + Edit.Height + 15, ButtonWidth, ButtonHeight); Form.ClientHeight := Top + Height + 13; end; if ShowModal = mrOk then begin Value := Edit.Text; Result := True; end; finally Form.Free; end;end;function InputBox(const ACaption, APrompt, ADefault: string): string;begin Result := ADefault; InputQuery(ACaption, APrompt, Result);end;上面是INPUTBOX在delphi中的定义,你自己改一下,将edit->masktedit就可以了 将Edit的属性passwordchar由#0改为*即可 方法1:将InputBox中的InputQuery修改一下 with Edit do begin Parent := Form; Left := Prompt.Left; Top := Prompt.Top + Prompt.Height + 5; Width := MulDiv(164, DialogUnits.X, 4); MaxLength := 255; Text := Value; PasswordChar:='*'//加上此句 SelectAll; end;方法2:通过发送消息来修改1.获取InputBox中的Edit框句柄2.SendMessage(Handle, EM_SETPASSWORDCHAR, Ord('*'), 0); 为什么非要inputbox呢,直接自己画一个窗口不行吗? 为什么非要inputbox呢,直接自己画一个窗口不行吗? InputBox是ShowModal出来的,没有结束对话框之前,下面的代码是不会被执行的。所以,第二种方法是不可行的。 感谢大家的热情回答。“PasswordChar:='*'//加上此句 ”这句加上了,可输入的时候还是没变成‘*’,why?自己画一个窗口的方法,我也知道。是一个朋友非要这么做,我只好来求大家帮助了! uses Consts;function GetAveCharSize(Canvas: TCanvas): TPoint;var I: Integer; Buffer: array[0..51] of Char;begin for I := 0 to 25 do Buffer[I] := Chr(I + Ord('A')); for I := 0 to 25 do Buffer[I + 26] := Chr(I + Ord('a')); GetTextExtentPoint(Canvas.Handle, Buffer, 52, TSize(Result)); Result.X := Result.X div 52;end;function InputQueryEx(const ACaption, APrompt: string; var Value: string; APassWordChar: char = #0): Boolean;var Form: TForm; Prompt: TLabel; Edit: TEdit; DialogUnits: TPoint; ButtonTop, ButtonWidth, ButtonHeight: Integer;begin Result := False; Form := TForm.Create(Application); with Form do try Canvas.Font := Font; DialogUnits := GetAveCharSize(Canvas); BorderStyle := bsDialog; Caption := ACaption; ClientWidth := MulDiv(180, DialogUnits.X, 4); Position := poScreenCenter; Prompt := TLabel.Create(Form); with Prompt do begin Parent := Form; Caption := APrompt; Left := MulDiv(8, DialogUnits.X, 4); Top := MulDiv(8, DialogUnits.Y, 8); Constraints.MaxWidth := MulDiv(164, DialogUnits.X, 4); WordWrap := True; end; Edit := TEdit.Create(Form); with Edit do begin passwordchar := APassWordChar; Parent := Form; Left := Prompt.Left; Top := Prompt.Top + Prompt.Height + 5; Width := MulDiv(164, DialogUnits.X, 4); MaxLength := 255; Text := Value; SelectAll; end; ButtonTop := Edit.Top + Edit.Height + 15; ButtonWidth := MulDiv(50, DialogUnits.X, 4); ButtonHeight := MulDiv(14, DialogUnits.Y, 8); with TButton.Create(Form) do begin Parent := Form; Caption := SMsgDlgOK; ModalResult := mrOk; Default := True; SetBounds(MulDiv(38, DialogUnits.X, 4), ButtonTop, ButtonWidth, ButtonHeight); end; with TButton.Create(Form) do begin Parent := Form; Caption := SMsgDlgCancel; ModalResult := mrCancel; Cancel := True; SetBounds(MulDiv(92, DialogUnits.X, 4), Edit.Top + Edit.Height + 15, ButtonWidth, ButtonHeight); Form.ClientHeight := Top + Height + 13; end; if ShowModal = mrOk then begin Value := Edit.Text; Result := True; end; finally Form.Free; end;end;function InputBoxEx(const ACaption, APrompt, ADefault: string;PassWordChar: char = #0): string;begin Result := ADefault; InputQueryEx(ACaption, APrompt, Result, PassWordChar);end; InputBoxEx('测试密码输入','请输入密码:','password','*'); 如何处理服务器罢工情况? TStringGrid的问题 如何用idhttp登录新浪微博 有用delphi的研究过新浪 OAuth2.0 认证吗? 自已编写的控件,如果要在KeyDown事件中监听键盘的事件需要设置什么。 在线急问:关于窗体的显示,请大家帮忙,多谢!!! 软件试用,提意见有分! 怎样加大在sql server中存储图片字段的大小 StringGrid控件,如何按CTRL键行多选,如何截获行多选事件? 我一直在用VB、VC,现在想学学Delphi,不知要多久?顺便推荐几本好书吧。 调用窗口时出错! 高手请进谢谢 ★☆★☆★☆★☆TCP通讯问题,特别急!!!!!!!
var Value: string): Boolean;
var
Form: TForm;
Prompt: TLabel;
Edit: TEdit;//改成 MaskEdit1: TMaskEdit; DialogUnits: TPoint;
ButtonTop, ButtonWidth, ButtonHeight: Integer;
begin
Result := False;
Form := TForm.Create(Application);
with Form do
try
Canvas.Font := Font;
DialogUnits := GetAveCharSize(Canvas);
BorderStyle := bsDialog;
Caption := ACaption;
ClientWidth := MulDiv(180, DialogUnits.X, 4);
Position := poScreenCenter;
Prompt := TLabel.Create(Form);
with Prompt do
begin
Parent := Form;
Caption := APrompt;
Left := MulDiv(8, DialogUnits.X, 4);
Top := MulDiv(8, DialogUnits.Y, 8);
Constraints.MaxWidth := MulDiv(164, DialogUnits.X, 4);
WordWrap := True;
end;
Edit := TEdit.Create(Form);//改成 MaskEdit1
with Edit do ///改成 MaskEdit1
begin
Parent := Form;
Left := Prompt.Left;
Top := Prompt.Top + Prompt.Height + 5;
Width := MulDiv(164, DialogUnits.X, 4);
MaxLength := 255;
Text := Value;
SelectAll;
end;
ButtonTop := Edit.Top + Edit.Height + 15;
ButtonWidth := MulDiv(50, DialogUnits.X, 4);
ButtonHeight := MulDiv(14, DialogUnits.Y, 8);
with TButton.Create(Form) do
begin
Parent := Form;
Caption := SMsgDlgOK;
ModalResult := mrOk;
Default := True;
SetBounds(MulDiv(38, DialogUnits.X, 4), ButtonTop, ButtonWidth,
ButtonHeight);
end;
with TButton.Create(Form) do
begin
Parent := Form;
Caption := SMsgDlgCancel;
ModalResult := mrCancel;
Cancel := True;
SetBounds(MulDiv(92, DialogUnits.X, 4), Edit.Top + Edit.Height + 15,
ButtonWidth, ButtonHeight);
Form.ClientHeight := Top + Height + 13;
end;
if ShowModal = mrOk then
begin
Value := Edit.Text;
Result := True;
end;
finally
Form.Free;
end;
end;function InputBox(const ACaption, APrompt, ADefault: string): string;
begin
Result := ADefault;
InputQuery(ACaption, APrompt, Result);
end;
上面是INPUTBOX在delphi中的定义,你自己改一下,将edit->masktedit就可以了
begin
Parent := Form;
Left := Prompt.Left;
Top := Prompt.Top + Prompt.Height + 5;
Width := MulDiv(164, DialogUnits.X, 4);
MaxLength := 255;
Text := Value;
PasswordChar:='*'//加上此句
SelectAll;
end;方法2:通过发送消息来修改
1.获取InputBox中的Edit框句柄
2.SendMessage(Handle, EM_SETPASSWORDCHAR, Ord('*'), 0);
InputBox是ShowModal出来的,没有结束对话框之前,下面的代码是不会被执行的。所以,第二种方法是不可行的。
“PasswordChar:='*'//加上此句 ”这句加上了,可输入的时候还是没变成‘*’,why?自己画一个窗口的方法,我也知道。是一个朋友非要这么做,我只好来求大家帮助了!
Consts;
function GetAveCharSize(Canvas: TCanvas): TPoint;
var
I: Integer;
Buffer: array[0..51] of Char;
begin
for I := 0 to 25 do Buffer[I] := Chr(I + Ord('A'));
for I := 0 to 25 do Buffer[I + 26] := Chr(I + Ord('a'));
GetTextExtentPoint(Canvas.Handle, Buffer, 52, TSize(Result));
Result.X := Result.X div 52;
end;
function InputQueryEx(const ACaption, APrompt: string;
var Value: string; APassWordChar: char = #0): Boolean;
var
Form: TForm;
Prompt: TLabel;
Edit: TEdit;
DialogUnits: TPoint;
ButtonTop, ButtonWidth, ButtonHeight: Integer;
begin
Result := False;
Form := TForm.Create(Application);
with Form do
try
Canvas.Font := Font;
DialogUnits := GetAveCharSize(Canvas);
BorderStyle := bsDialog;
Caption := ACaption;
ClientWidth := MulDiv(180, DialogUnits.X, 4);
Position := poScreenCenter;
Prompt := TLabel.Create(Form);
with Prompt do
begin
Parent := Form;
Caption := APrompt;
Left := MulDiv(8, DialogUnits.X, 4);
Top := MulDiv(8, DialogUnits.Y, 8);
Constraints.MaxWidth := MulDiv(164, DialogUnits.X, 4);
WordWrap := True;
end;
Edit := TEdit.Create(Form);
with Edit do
begin
passwordchar := APassWordChar;
Parent := Form;
Left := Prompt.Left;
Top := Prompt.Top + Prompt.Height + 5;
Width := MulDiv(164, DialogUnits.X, 4);
MaxLength := 255;
Text := Value;
SelectAll;
end;
ButtonTop := Edit.Top + Edit.Height + 15;
ButtonWidth := MulDiv(50, DialogUnits.X, 4);
ButtonHeight := MulDiv(14, DialogUnits.Y, 8);
with TButton.Create(Form) do
begin
Parent := Form;
Caption := SMsgDlgOK;
ModalResult := mrOk;
Default := True;
SetBounds(MulDiv(38, DialogUnits.X, 4), ButtonTop, ButtonWidth,
ButtonHeight);
end;
with TButton.Create(Form) do
begin
Parent := Form;
Caption := SMsgDlgCancel;
ModalResult := mrCancel;
Cancel := True;
SetBounds(MulDiv(92, DialogUnits.X, 4), Edit.Top + Edit.Height + 15,
ButtonWidth, ButtonHeight);
Form.ClientHeight := Top + Height + 13;
end;
if ShowModal = mrOk then
begin
Value := Edit.Text;
Result := True;
end;
finally
Form.Free;
end;
end;function InputBoxEx(const ACaption, APrompt, ADefault: string;PassWordChar: char = #0): string;
begin
Result := ADefault;
InputQueryEx(ACaption, APrompt, Result, PassWordChar);
end;