[PB] PB中讀寫檔案通用的兩個函式
PB中讀寫檔案通用的兩個函式
1、檔案讀取 :
//函式名：f_readfile
//功能：讀取檔案
//引數：
// io_file：ref blob 大物件型別，儲存讀出的檔案內容；
// is_filename：string 檔名
//返回值：int 1-成功 0-失敗
LONG ll_len
int li_FileNum,li_count,loops,i,bytes_read
blob lblb_b,tot_b
int liResult=1
ll_len=FileLength(is_filename)
IF ll_len > 32765 THEN
IF Mod(ll_len, 32765) = 0 THEN
loops = ll_len/32765
ELSE
loops = (ll_len/32765) + 1
END IF
ELSE
loops = 1
END IF
li_FileNum = FileOpen(is_filename,StreamMode!, read!, lockread!)
if li_filenum = -1 then
messagebox("","無法開啟檔案"+ is_filename)
end if
FOR i = 1 to loops
bytes_read=FileRead(li_FileNum, lblb_b)
if bytes_read = -1 then
messagebox("","讀取檔案"+is_filename+"失敗!")
liResult = 0
exit
end if
if i=1 then
tot_b = lblb_b
else
tot_b = tot_b + lblb_b
end if
NEXT
Fileclose(li_FileNum)
if liResult = 1 then
ib_file=tot_b
end if
return liResult
2、檔案寫入 :
//函式名：f_writefile
//功能：寫入檔案
//引數：
// io_file：blob 大物件型別，儲存將寫入的檔案內容；
// is_filename：string 檔名
//返回值：int 1-成功 0-失敗
uLONG ll_len,li_count,loops
int li_FileNum
blob lblb_b
int liResult = 1
ll_len=len(ib_file)
IF ll_len > 32765 THEN
IF Mod(ll_len, 32765) = 0 THEN
loops = ll_len/32765
ELSE
loops = (ll_len/32765) + 1
END IF
ELSE
loops = 1
END IF
li_FileNum = FileOpen(is_filename,StreamMode!, write!, shared!,Replace!)
if li_FileNum = -1 then
messagebox("系統提示","無法開啟檔案"+is_filename)
return 0
end if
FOR li_count = 1 to loops
lblb_b = blobmid( ib_file , ( li_count - 1) * 32765 + 1 , 32765 )
if FileWrite(li_FileNum, lblb_b) = -1 then
messagebox("系統提示","寫檔案" + is_filename+"失敗")
liResult=0
exit
end if//8010
NEXT
Fileclose(li_FileNum)
//if liResult=1 then
// liResult = gf_setfiletime(is_filename,idt_file_time)
//end if
return liResult