Delphi读取文件和写入文件总结
---
读取文件:
1,关联文件:AssignFile(pMyFile,'c:\ttt.csv');
2,打开文件:Reset(pMyFile);
3,读取一行:Readln(pMyFile,pStr);
4,关闭文件:CloseFile(pMyFile);
示例:
procedure TForm1.Button1Click(Sender: TObject);
var
pMyFile:textfile;
pStr : string;
begin
if OpenDialog1.Execute then begin
Assignfile(pMyFile,OpenDialog1.FileName);
Reset(pMyFile);
while not Eof(pMyFile) do begin
Readln(pMyFile,pStr);
//fn_DelStock(pStr); //使用读取的字符串相关语句
next;
end;
CloseFile(pMyFile);
end;
end;
+++
写入文件:
1,关联文件:AssignFile(pMyFile,'c:\ttt.csv');
2,打开文件:ReWrite(pMyFile); //如果文件不存在,用ReWrite打开
Append(pMyFile); //如果文件已经存在,追加内容,用Append打开
3,写入一行:WriteLn(pMyFile,pStr);
4,关闭文件:CloseFile(pMyFile);
示例:
procedure TForm1.WLog(pMsg: string);
var
pFObJect,pFPath,pFName: string;
pMyFile: textFile;
pStr: string;
begin
pFPath:='d:';
pFName:='StockDel_'+formatDateTime('yyyymmddhhmmss',now);
pFObject:=pFPath + '\' + pFName + '.csv';
try
AssignFile(pMyFile,pFObject);
if FileExists(pFObject)=false then
ReWrite(pMyFile)
else
Append(pMyFile);
pStr:=pMsg;
WriteLn(pMyFile,pStr);
finally
CloseFile(pMyFile);
end;
end;
+++
公用写日志文件过程
//==ini文件设置:
'日志选项和文件 当Log_Flag=N时不记录,否则均记录
Log_Flag=1
Log_PathFileName=\\10.105.10.12\c\Prd_220_File\log.dat
//==声明全局变量
x_pLogFile: string; //日志文件名称
x_pLogFlag: string; //是否记录日志,N:不写日志
x_pFindLogFile: boolean; //记录日志文件是否存在,避免每次写日志时都要判断。
//==过程声明
procedure cpWriteLog(pFObject:string; pTxt:string; pMode:byte);
//==初始化全局变量
procedure TForm1.FormCreate(Sender: TObject);
begin
x_pLogFile:= cfReadIniFile(X_cProgID,'Log_PathFileName','c:\ENRC0300_Log.txt');
x_pLogFlag:= cfReadIniFile(X_cProgID,'Log_Flag','N');
end;
//==写日志过程
procedure cpWriteLog(pFObject:string; pTxt:string; pMode:byte);
var
pMyFile: textFile;
begin
if x_pLogFlag='N' then exit;
try
AssignFile(pMyFile,pFObject)
Delphi读取文件和写入和DELPHI 操作的一些小技巧
最新推荐文章于 2020-08-18 11:24:28 发布