[英]Display a text file into html table
我有一個文本文件,我想解析它並將結果保留為HTML表在頁面中。
文本文件中的每一行都是制表符分隔的,具有不同功能的值。 我想解析每一行,然后按Tab鍵拆分並將每一行另存為Javascript對象。因此為每一行保存了一個對象,因此我將擁有一個對象數組。
然后,我想將該對象數組顯示到html頁的表中。 這里是我的嘗試,但它並沒有顯示任何東西! 我沒有任何錯誤! 在函數yolla()
我正在讀取文本文件。我通過函數library_object()
定義了對象。 然后,我閱讀了文本文件的每一行,並按Tab鍵將其分開,然后將其保存到一個對象中。 那么每一行將是var lib_info = new Array()
一個對象。
實際上,我不知道如何將lib_info[]
數組顯示到表中。
<div id="Summary">
<p>In this page a summary of all available libraries in the HBase is shown! </p>
<script type="text/javascript">
var lib;
var lib_info = new Array();
if(navigator.appName.search('Microsoft')>-1) {
lib = new ActiveXObject('MSXML2.XMLHTTP');
} else {
lib = new XMLHttpRequest();
}
function yolla() {
lib.open('get', 'library.txt', true);
lib.onreadystatechange= cevap;
lib.send(null);
}
function cevap(){
if(lib.readyState==4) {
libArray = lib.responseText.split("\n");
extract_libs(libArray);
}
}
function extract_libs(libArray){
var ORACLE_LIB_ID;
var COMMON_NAME;
var SCIENTIFIC_NAME;
var GENETIC_BACKGROUND;
var TISSUE;
var DEV_STAGE;
var TREATMENT;
var ECTOPIC_ID;
var ECTOPIC_TYPE;
var EVENT_ID;
var REPLICATE_NUMBER;
var EXPERIMENT_DESC;
var ADAPTOR_5;
var ADAPTOR_3;
var DATE_SENT;
var DATE_RETURN;
var LIB_NAME;
var QC_NOTE;
var SEQUENCER;
for (i=0; i<libArray.length; i++){
lib_tag = libArray[i].split("\t");
for(j=0;j<lib_tag.length;j++){
switch(j){
case 0:
ORACLE_LIB_ID = lib_tag[0];
break;
case 1:
COMMON_NAME = lib_tag[1];
break;
case 2:
SCIENTIFIC_NAME = lib_tag[2];
break;
case 3:
GENETIC_BACKGROUND = lib_tag[3];
break;
case 4:
TISSUE = lib_tag[4];
break;
case 5:
DEV_STAGE = lib_tag[5];
break;
case 6:
TREATMENT = lib_tag[6];
break;
case 7:
ECTOPIC_ID = lib_tag[7];
break;
case 8:
ECTOPIC_TYPE = lib_tag[8];
break;
case 9:
EVENT_ID = lib_tag[9];
break;
case 10:
REPLICATE_NUMBER = lib_tag[10];
break;
case 11:
EXPERIMENT_DESC = lib_tag[11];
break;
case 12:
ADAPTOR_5 = lib_tag[12];
break;
case 13:
ADAPTOR_3 = lib_tag[13];
break;
case 14:
DATE_SENT = lib_tag[14];
break;
case 15:
DATE_RETURN = lib_tag[15];
break;
case 16:
LIB_NAME = lib_tag[16];
break;
case 17:
QC_NOTE = lib_tag[17];
break;
case 18:
SEQUENCER = lib_tag[18];
break;
}
}
lib_info[i] = new library_object(ORACLE_LIB_ID, COMMON_NAME, SCIENTIFIC_NAME, GENETIC_BACKGROUND, TISSUE, DEV_STAGE, TREATMENT, ECTOPIC_ID, ECTOPIC_TYPE, EVENT_ID, REPLICATE_NUMBER, EXPERIMENT_DESC, ADAPTOR_5, ADAPTOR_3, DATE_SENT, DATE_RETURN, LIB_NAME, QC_NOTE, SEQUENCER);
}
}
function library_object(ORACLE_LIB_ID, COMMON_NAME, SCIENTIFIC_NAME, GENETIC_BACKGROUND, TISSUE, DEV_STAGE, TREATMENT, ECTOPIC_ID, ECTOPIC_TYPE, EVENT_ID, REPLICATE_NUMBER, EXPERIMENT_DESC, ADAPTOR_5, ADAPTOR_3, DATE_SENT, DATE_RETURN, LIB_NAME, QC_NOTE, SEQUENCER){
this.libID = ORACLE_LIB_ID;
this.ComName = COMMON_NAME;
this.ScnName = SCIENTIFIC_NAME;
this.background = GENETIC_BACKGROUND;
this.tissue = TISSUE;
this.devStage = DEV_STAGE;
this.treatment = TREATMENT;
this.ectopic = ECTOPIC_ID;
this.ectType = ECTOPIC_TYPE;
this.eventID = EVENT_ID;
this.ReplicateNum = REPLICATE_NUMBER;
this.ExpDesc = EXPERIMENT_DESC;
this.adaptor5 = ADAPTOR_5;
this.adaptor3 = ADAPTOR_3;
this.dateSent = DATE_SENT;
this.dateReturn = DATE_RETURN;
this.libName = LIB_NAME;
this.QcNote = QC_NOTE;
this.sequencer = SEQUENCER;
}
</script>
<input type="button" value="show library" onclick="yolla()">
<table>
<tr>
<th>Library ID</th>
<th>Common Name</th>
<th>Tissue</th>
<th>BackGround</th>
</tr>
<script>
for (i=0; i<lib_info.length; i++){
document.write('<tr><td>' + lib_info[i].libID + '</td><td>'+ lib_info[i].ComName + '</td><td>' + lib_info[i].tissue + '</td><td>' + lib_info[i].background + '</td></tr>');
}
</script>
</table>
<div id="library"></div>
</div>
誰能告訴我缺少了什么?
XMLHttpRequest
是異步的,因此當您嘗試循環時,數組的長度可能為0。
您可以嘗試在文本變量中編寫HTML片段,然后將其插入div元素
function cevap() {
if(lib.readyState==4) {
libArray = lib.responseText.split("\n");
extract_libs(libArray);
createTable() // <--------
}
}
function createTable() {
var table = '<table><tr><th>Library ID</th><th>Common Name</th>' +
'<th>Tissue</th><th>BackGround</th></tr>';
for (i=0; i<lib_info.length; i++){
table += '<tr><td>' + lib_info[i].libID + '</td><td>' +
lib_info[i].ComName + '</td><td>' + lib_info[i].tissue + '</td><td>' +
lib_info[i].background + '</td></tr>';
}
table += '</table>';
document.getElementById('myCoolElement').innerHTML = table;
}
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