1<?xml version="1.0" encoding="UTF-8"?> 2 3<!--*********************************************************** 4 * 5 * Licensed to the Apache Software Foundation (ASF) under one 6 * or more contributor license agreements. See the NOTICE file 7 * distributed with this work for additional information 8 * regarding copyright ownership. The ASF licenses this file 9 * to you under the Apache License, Version 2.0 (the 10 * "License"); you may not use this file except in compliance 11 * with the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, 16 * software distributed under the License is distributed on an 17 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 18 * KIND, either express or implied. See the License for the 19 * specific language governing permissions and limitations 20 * under the License. 21 * 22 ***********************************************************--> 23 24<helpdocument version="1.0"> 25<meta> 26<topic id="textsbasicshared03020303xml" indexer="include" status="PUBLISH"> 27<title id="tit" xml-lang="en-US">Lof Function [Runtime]</title> 28<filename>/text/sbasic/shared/03020303.xhp</filename> 29</topic> 30</meta> 31<body> 32<section id="lof"> 33<bookmark xml-lang="en-US" branch="index" id="bm_id3156024"> 34<bookmark_value>Lof function</bookmark_value> 35</bookmark> 36<paragraph role="heading" id="hd_id3156024" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/sbasic/shared/03020303.xhp" name="Lof Function [Runtime]">Lof Function [Runtime]</link></paragraph> 37<paragraph role="paragraph" id="par_id3146794" xml-lang="en-US" l10n="U" oldref="2">Returns the size of an open file in bytes.</paragraph> 38</section> 39<paragraph role="heading" id="hd_id3153380" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph> 40<paragraph role="code" id="par_id3150359" xml-lang="en-US" l10n="U" oldref="4">Lof (FileNumber)</paragraph> 41<paragraph role="heading" id="hd_id3154141" xml-lang="en-US" level="2" l10n="U" oldref="5">Return value:</paragraph> 42<paragraph role="paragraph" id="par_id3147230" xml-lang="en-US" l10n="U" oldref="6">Long</paragraph> 43<paragraph role="heading" id="hd_id3156281" xml-lang="en-US" level="2" l10n="U" oldref="7">Parameters:</paragraph> 44<paragraph role="paragraph" id="par_id3150869" xml-lang="en-US" l10n="U" oldref="8"> 45<emph>FileNumber:</emph> Any numeric expression that contains the file number that is specified in the Open statement.</paragraph> 46<paragraph role="tip" id="par_id3147349" xml-lang="en-US" l10n="U" oldref="9">To obtain the length of a file that is not open, use the <emph>FileLen</emph> function.</paragraph> 47<embed href="text/sbasic/shared/00000003.xhp#errorcode"/> 48<embed href="text/sbasic/shared/00000003.xhp#err5"/> 49<embed href="text/sbasic/shared/00000003.xhp#err52"/> 50<paragraph role="heading" id="hd_id3155415" xml-lang="en-US" level="2" l10n="U" oldref="10">Example:</paragraph> 51<paragraph role="code" id="par_id3151074" xml-lang="en-US" l10n="U" oldref="11">Sub ExampleRandomAccess</paragraph> 52<paragraph role="code" id="par_id3145251" xml-lang="en-US" l10n="U" oldref="12">Dim iNumber As Integer</paragraph> 53<paragraph role="code" id="par_id3154730" xml-lang="en-US" l10n="U" oldref="13">Dim sText As Variant REM must be a Variant</paragraph> 54<paragraph role="code" id="par_id3145646" xml-lang="en-US" l10n="U" oldref="14">Dim aFile As String</paragraph> 55<paragraph role="code" id="par_id3153157" xml-lang="en-US" l10n="U" oldref="15">aFile = "c:\data.txt"</paragraph> 56<paragraph role="code" id="par_id3149403" xml-lang="en-US" l10n="U" oldref="17">iNumber = Freefile</paragraph> 57<paragraph role="code" id="par_id3149121" xml-lang="en-US" l10n="U" oldref="18">Open aFile For Random As #iNumber Len=32</paragraph> 58<paragraph role="code" id="par_id3156276" xml-lang="en-US" l10n="U" oldref="19">Seek #iNumber,1 REM Position at start</paragraph> 59<paragraph role="code" id="par_id3148405" xml-lang="en-US" l10n="U" oldref="20">Put #iNumber,, "This is the first line of text" REM Fill with text</paragraph> 60<paragraph role="code" id="par_id3154756" xml-lang="en-US" l10n="U" oldref="21">Put #iNumber,, "This is the second line of text"</paragraph> 61<paragraph role="code" id="par_id3145643" xml-lang="en-US" l10n="U" oldref="22">Put #iNumber,, "This is the third line of text"</paragraph> 62<paragraph role="code" id="par_id3156383" xml-lang="en-US" l10n="U" oldref="23">Seek #iNumber,2</paragraph> 63<paragraph role="code" id="par_id3155333" xml-lang="en-US" l10n="U" oldref="24">Get #iNumber,,sText</paragraph> 64<paragraph role="code" id="par_id3149255" xml-lang="en-US" l10n="U" oldref="25">Print sText</paragraph> 65<paragraph role="code" id="par_id3154702" xml-lang="en-US" l10n="U" oldref="26">Close #iNumber</paragraph> 66<paragraph role="code" id="par_id3153965" xml-lang="en-US" l10n="U" oldref="28">iNumber = Freefile</paragraph> 67<paragraph role="code" id="par_id3163807" xml-lang="en-US" l10n="U" oldref="29">Open aFile For Random As #iNumber Len=32</paragraph> 68<paragraph role="code" id="par_id3155607" xml-lang="en-US" l10n="U" oldref="30">Get #iNumber,2,sText</paragraph> 69<paragraph role="code" id="par_id3150299" xml-lang="en-US" l10n="U" oldref="31">Put #iNumber,,"This is a new line of text"</paragraph> 70<paragraph role="code" id="par_id3147002" xml-lang="en-US" l10n="U" oldref="32">Get #iNumber,1,sText</paragraph> 71<paragraph role="code" id="par_id3149036" xml-lang="en-US" l10n="U" oldref="33">Get #iNumber,2,sText</paragraph> 72<paragraph role="code" id="par_id3166425" xml-lang="en-US" l10n="U" oldref="34">Put #iNumber,20,"This is the text in record 20"</paragraph> 73<paragraph role="code" id="par_id3149817" xml-lang="en-US" l10n="U" oldref="35">Print Lof(#iNumber)</paragraph> 74<paragraph role="code" id="par_id3146811" xml-lang="en-US" l10n="U" oldref="36">Close #iNumber</paragraph> 75<paragraph role="code" id="par_id3154200" xml-lang="en-US" l10n="U" oldref="38">end sub</paragraph> 76</body> 77</helpdocument> 78