1<?xml version="1.0" encoding="UTF-8"?> 2 3 4<!--*********************************************************** 5 * 6 * Licensed to the Apache Software Foundation (ASF) under one 7 * or more contributor license agreements. See the NOTICE file 8 * distributed with this work for additional information 9 * regarding copyright ownership. The ASF licenses this file 10 * to you under the Apache License, Version 2.0 (the 11 * "License"); you may not use this file except in compliance 12 * with the License. You may obtain a copy of the License at 13 * 14 * http://www.apache.org/licenses/LICENSE-2.0 15 * 16 * Unless required by applicable law or agreed to in writing, 17 * software distributed under the License is distributed on an 18 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 19 * KIND, either express or implied. See the License for the 20 * specific language governing permissions and limitations 21 * under the License. 22 * 23 ***********************************************************--> 24 25 26 27<helpdocument version="1.0"> 28<meta> 29<topic id="textsbasicshared03020301xml" indexer="include" status="PUBLISH"> 30<title id="tit" xml-lang="en-US">Eof Function [Runtime]</title> 31<filename>/text/sbasic/shared/03020301.xhp</filename> 32</topic> 33<history> 34<created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created> 35<lastedited date="2004-09-01T15:24:39">converted from old format - fpe</lastedited> 36</history> 37</meta> 38<body> 39<section id="eof"> 40<bookmark xml-lang="en-US" branch="index" id="bm_id3154598"><bookmark_value>Eof function</bookmark_value> 41</bookmark> 42<paragraph role="heading" id="hd_id3154598" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/sbasic/shared/03020301.xhp" name="Eof Function [Runtime]">Eof Function [Runtime]</link></paragraph> 43<paragraph role="paragraph" id="par_id3147182" xml-lang="en-US" l10n="U" oldref="2">Determines if the file pointer has reached the end of a file.</paragraph> 44</section> 45<paragraph role="heading" id="hd_id3149119" xml-lang="en-US" level="2" l10n="U" oldref="3">Syntax:</paragraph> 46<paragraph role="code" id="par_id3147399" xml-lang="en-US" l10n="U" oldref="4">Eof (intexpression As Integer)</paragraph> 47<paragraph role="heading" id="hd_id3153539" xml-lang="en-US" level="2" l10n="U" oldref="5">Return value:</paragraph> 48<paragraph role="paragraph" id="par_id3156027" xml-lang="en-US" l10n="U" oldref="6">Bool</paragraph> 49<paragraph role="heading" id="hd_id3152924" xml-lang="en-US" level="2" l10n="U" oldref="7">Parameters:</paragraph> 50<paragraph role="paragraph" id="par_id3153990" xml-lang="en-US" l10n="U" oldref="8"> 51<emph>Intexpression:</emph> Any integer expression that evaluates to the number of an open file.</paragraph> 52<paragraph role="paragraph" id="par_id3153527" xml-lang="en-US" l10n="U" oldref="9">Use EOF to avoid errors when you attempt to get input past the end of a file. When you use the Input or Get statement to read from a file, the file pointer is advanced by the number of bytes read. When the end of a file is reached, EOF returns the value "True" (-1).</paragraph> 53<embed href="text/sbasic/shared/00000003.xhp#errorcode"/> 54<embed href="text/sbasic/shared/00000003.xhp#err5"/> 55<embed href="text/sbasic/shared/00000003.xhp#err52"/> 56<paragraph role="heading" id="hd_id3154046" xml-lang="en-US" level="2" l10n="U" oldref="10">Example:</paragraph> 57<paragraph role="code" id="par_id3143270" xml-lang="en-US" l10n="U" oldref="11">Sub ExampleWorkWithAFile</paragraph> 58<paragraph role="code" id="par_id3150670" xml-lang="en-US" l10n="U" oldref="12">Dim iNumber As Integer</paragraph> 59<paragraph role="code" id="par_id3154143" xml-lang="en-US" l10n="U" oldref="13">Dim sLine As String</paragraph> 60<paragraph role="code" id="par_id3148943" xml-lang="en-US" l10n="U" oldref="14">Dim aFile As String</paragraph> 61<paragraph role="code" id="par_id3153897" xml-lang="en-US" l10n="U" oldref="37">Dim sMsg as String</paragraph> 62<paragraph role="code" id="par_id3156344" xml-lang="en-US" l10n="U" oldref="15">aFile = "c:\data.txt"</paragraph> 63<paragraph role="code" id="par_id3148663" xml-lang="en-US" l10n="U" oldref="17">iNumber = Freefile</paragraph> 64<paragraph role="code" id="par_id3153379" xml-lang="en-US" l10n="U" oldref="18">Open aFile For Output As #iNumber</paragraph> 65<paragraph role="code" id="par_id3153360" xml-lang="en-US" l10n="U" oldref="19">Print #iNumber, "First line of text"</paragraph> 66<paragraph role="code" id="par_id3148797" xml-lang="en-US" l10n="U" oldref="20">Print #iNumber, "Another line of text"</paragraph> 67<paragraph role="code" id="par_id3154684" xml-lang="en-US" l10n="U" oldref="21">Close #iNumber</paragraph> 68<paragraph role="code" id="par_id3153104" xml-lang="en-US" l10n="U" oldref="25">iNumber = Freefile</paragraph> 69<paragraph role="code" id="par_id3144761" xml-lang="en-US" l10n="U" oldref="26">Open aFile For Input As iNumber</paragraph> 70<paragraph role="code" id="par_id3153193" xml-lang="en-US" l10n="U" oldref="27">While not eof(iNumber)</paragraph> 71<paragraph role="code" id="par_id3158408" xml-lang="en-US" l10n="U" oldref="28">Line Input #iNumber, sLine</paragraph> 72<paragraph role="code" id="par_id3149203" xml-lang="en-US" l10n="U" oldref="29">If sLine <>"" then</paragraph> 73<paragraph role="code" id="par_id3153770" xml-lang="en-US" l10n="U" oldref="30">sMsg = sMsg & sLine & chr(13)</paragraph> 74<paragraph role="code" id="par_id3153367" xml-lang="en-US" l10n="U" oldref="32">end if</paragraph> 75<paragraph role="code" id="par_id3147318" xml-lang="en-US" l10n="U" oldref="33">wend</paragraph> 76<paragraph role="code" id="par_id3152939" xml-lang="en-US" l10n="U" oldref="34">Close #iNumber</paragraph> 77<paragraph role="code" id="par_id3153726" xml-lang="en-US" l10n="U" oldref="38">Msgbox sMsg</paragraph> 78<paragraph role="code" id="par_id3153092" xml-lang="en-US" l10n="U" oldref="35">End Sub</paragraph> 79</body> 80</helpdocument> 81