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<TD class="tt2" bgcolor="#F5F8F8" width="84%"><center><B><FONT style="FONT-SIZE: 16.5pt" COLOR="#FF6666" FACE="楷體_GB2312">用Delphi創(chuàng)建臨時(shí)文件</FONT></B></center>
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<p><span style="font-size: 9pt">在用Delphi 3.0開(kāi)發(fā)應(yīng)用程序時(shí),經(jīng)常需要建立一個(gè)或多個(gè)臨時(shí)文件方便程序的開(kāi)發(fā)。用完后,可以將其刪除。如何在Delphi
3.0 中創(chuàng)建臨時(shí)文件,需要用到Windows的API函數(shù)GetTempFileName。下面將介紹該函數(shù)的格式和使用它創(chuàng)建臨時(shí)文件的方法。<br>
<br>
<strong><br>
一、函數(shù)格式:(用VB說(shuō)明)<br>
<br>
</strong><br>
Private Declare Function GetTempFileName Lib "kernel32" Alias
"GetTempFileNameA" (ByVal lpszPath As String, ByVal lpPrefixString As String,
ByVal wUnique As Long, ByVal lpTempFileName As String) As Long <br>
<br>
參數(shù)說(shuō)明: lpszPath參數(shù)表示創(chuàng)建新文件的路徑名; lpPrefixString參數(shù)表示給定文件名的前綴;
wUnique參數(shù)應(yīng)設(shè)置為0,表示文件名稱自動(dòng)產(chǎn)生的隨機(jī)號(hào)碼; lpTempFileName參數(shù)表示一個(gè)字符串緩存區(qū)域,至少有256個(gè)字符長(zhǎng)度存放臨時(shí)文件的名稱。<br>
<br>
<strong><br>
二、創(chuàng)建含有如下控件的窗體:<br>
</strong><br>
控件 CAPTION FONT
SIZE<br>
<br>
<br>
FORM1 建立臨時(shí)文件<br>
<br>
<br>
EDIT1 空<br>
<br>
<br>
BUTTON1 建立臨時(shí)文件 宋體
12 <br>
<br>
<br>
BUTTON2 退出 宋體
12<br>
<br>
<br>
</span>
<p><span style="font-size: 9pt"><br>
<strong><br>
三、程序代碼如下:<br>
<br>
</strong><br>
unit tempfiles;<br>
<br>
interface<br>
<br>
uses<br>
<br>
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,<br>
<br>
StdCtrls;<br>
<br>
type<br>
<br>
TForm1 = class(TForm)<br>
<br>
Edit1: TEdit;<br>
<br>
Button1: TButton;<br>
<br>
Button2: TButton;<br>
<br>
Label1: TLabel;<br>
<br>
procedure Button1Click(Sender: TObject);<br>
<br>
procedure Button2Click(Sender: TObject);<br>
<br>
private<br>
<br>
{ Private declarations }<br>
<br>
public<br>
<br>
{ Public declarations }<br>
<br>
end;<br>
<br>
var<br>
<br>
Form1: TForm1;<br>
<br>
implementation<br>
<br>
{$R *.DFM}<br>
<br>
procedure TForm1.Button1Click(Sender: TObject);<br>
<br>
var tempfilename:pchar;<br>
<br>
drivename:pchar;<br>
<br>
begin<br>
<br>
drivename:=′c:′;<br>
<br>
getmem(tempfilename,256);<br>
<br>
gettempfilename(drivename,′text′,0,tempfilename);<br>
<br>
edit1.text:=tempfilename;<br>
<br>
end;<br>
<br>
procedure TForm1.Button2Click(Sender: TObject);<br>
<br>
begin<br>
<br>
close;<br>
<br>
end;<br>
<br>
end.<br>
<br>
按下F9鍵,執(zhí)行本程序,單擊“建立臨時(shí)文件”按鈕,在C盤(pán)當(dāng)前目錄下新創(chuàng)建的臨時(shí)文件的文件名稱顯示在編輯框控件中。用資源管理器可以檢查該臨時(shí)文件是否存在。<br>
<br>
以上程序在中文Windows 98,Delphi 3.0軟件環(huán)境下運(yùn)行通過(guò)。</span></p>
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