Heim >Web-Frontend >js-Tutorial >Ausführliche Erläuterung von Methodenbeispielen zum dynamischen Hinzufügen und Löschen von Zeilen in JavaScript_Javascript-Kenntnissen
Das Beispiel in diesem Artikel beschreibt die Methode zum dynamischen Hinzufügen und Löschen von Zeilen mithilfe von JavaScript. Teilen Sie es als Referenz mit allen. Die Details lauten wie folgt:
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>增加Table行</title> </head> <script language="javascript">// Example: obj = findObj("image1"); function findObj(theObj, theDoc){ var p, i, foundObj; if(!theDoc) theDoc = document; if( (p = theObj.indexOf("?")) > 0 && parent.frames.length) { theDoc = parent.frames[theObj.substring(p+1)].document; theObj = theObj.substring(0,p); } if(!(foundObj = theDoc[theObj]) && theDoc.all) foundObj = theDoc.all[theObj]; for (i=0; !foundObj && i < theDoc.forms.length; i++) foundObj = theDoc.forms[i][theObj]; for(i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) foundObj = findObj(theObj,theDoc.layers[i].document); if(!foundObj && document.getElementById) foundObj = document.getElementById(theObj); return foundObj;} //添加一个参与人填写行 function AddSignRow(){ //读取最后一行的行号,存放在txtTRLastIndex文本框中 var txtTRLastIndex = findObj("txtTRLastIndex",document); var rowID = parseInt(txtTRLastIndex.value); var signFrame = findObj("SignFrame",document); //添加行 var newTR = signFrame.insertRow(signFrame.rows.length); newTR.id = "SignItem" + rowID; //添加列:序号 var newNameTD=newTR.insertCell(0); //添加列内容 newNameTD.innerHTML = newTR.rowIndex.toString(); //添加列:姓名 var newNameTD=newTR.insertCell(1); //添加列内容 newNameTD.innerHTML = "<input name='txtName" + rowID + "' id='txtName" + rowID + "' type='text' size='12' />"; //添加列:电子邮箱 var newEmailTD=newTR.insertCell(2); //添加列内容 newEmailTD.innerHTML = "<input name='txtEMail" + rowID + "' id='txtEmail" + rowID + "' type='text' size='20' />"; //添加列:电话 var newTelTD=newTR.insertCell(3); //添加列内容 newTelTD.innerHTML = "<input name='txtTel" + rowID + "' id='txtTel" + rowID + "' type='text' size='10' />"; //添加列:手机 var newMobileTD=newTR.insertCell(4); //添加列内容 newMobileTD.innerHTML = "<input name='txtMobile" + rowID + "' id='txtMobile" + rowID + "' type='text' size='12' />"; //添加列:公司名 var newCompanyTD=newTR.insertCell(5); //添加列内容 newCompanyTD.innerHTML = "<input name='txtCompany" + rowID + "' id='txtCompany" + rowID + "' type='text' size='20' />"; //添加列:删除按钮 var newDeleteTD=newTR.insertCell(6); //添加列内容 newDeleteTD.innerHTML = "<div align='center' style='width:40px'><a href='javascript:;' onclick=\"DeleteSignRow('SignItem" + rowID + "')\">删除</a></div>"; //将行号推进下一行 txtTRLastIndex.value = (rowID + 1).toString() ; } //删除指定行 function DeleteSignRow(rowid){ var signFrame = findObj("SignFrame",document); var signItem = findObj(rowid,document); //获取将要删除的行的Index var rowIndex = signItem.rowIndex; //删除指定Index的行 signFrame.deleteRow(rowIndex); //重新排列序号,如果没有序号,这一步省略 for(i=rowIndex;i<signFrame.rows.length;i++){ signFrame.rows[i].cells[0].innerHTML = i.toString(); } }//清空列表 function ClearAllSign(){ if(confirm('确定要清空所有参与人吗?')){ var signFrame = findObj("SignFrame",document); var rowscount = signFrame.rows.length; //循环删除行,从最后一行往前删除 for(i=rowscount - 1;i > 0; i--){ signFrame.deleteRow(i); } //重置最后行号为1 var txtTRLastIndex = findObj("txtTRLastIndex",document); txtTRLastIndex.value = "1"; //预添加一行 AddSignRow(); } } </script> <body> <div> <table width="613" border="0" cellpadding="2" cellspacing="1" id="SignFrame"> <tr id="trHeader"> <td width="27" bgcolor="#96E0E2">序号</td> <td width="64" bgcolor="#96E0E2">用户姓名</td> <td width="98" bgcolor="#96E0E2">电子邮箱</td> <td width="92" bgcolor="#96E0E2">固定电话</td> <td width="86" bgcolor="#96E0E2">移动手机</td> <td width="153" bgcolor="#96E0E2">公司名称</td> <td width="57" align="center" bgcolor="#96E0E2"> </td> </tr> </table> </div> <div> <input type="button" name="Submit" value="添加参与人" onclick="AddSignRow()" /> <input type="button" name="Submit2" value="清空" onclick="ClearAllSign()" /> <input name='txtTRLastIndex' type='hidden' id='txtTRLastIndex' value="1" /> </div> </body> </html>
JavaScript zum dynamischen Hinzufügen oder Löschen von Tabellenzeilen
<SCRIPT LANGUAGE="JScript"> function numberCells() { var count=0; for (i=0; i < document.all.mytable.rows.length; i++) { for (j=0; j < document.all.mytable.rows(i).cells.length; j++) { document.all.mytable.rows(i).cells(j).innerText = count; count++; } } } function tb_addnew() { var ls_t=document.all("mytable") maxcell=ls_t.rows(0).cells.length; mynewrow = ls_t.insertRow(); for(i=0;i<maxcell;i++) { mynewcell=mynewrow.insertCell(); mynewcell.innerText="a"+i; } } function tb_delete() { var ls_t=document.all("mytable"); maxcell=ls_t.rows.length; if(maxcell > 1) { ls_t.deleteRow() ; } } </SCRIPT> <BODY onload="numberCells()"> <TABLE id=mytable border=1> <TR><TH> </TH><TH> </TH><TH> </TH><TH> </TH></TR> <TR><TD> </TD><TD> </TD><TD> </TD><TD> </TD></TR> <TR><TD> </TD><TD> </TD><TD> </TD><TD> </TD></TR> </TABLE> <input type=button value="Ins Row" onclick="tb_addnew()"> <input type=button value="Del Row" onclick="tb_delete()" >
Ich hoffe, dass dieser Artikel für das JavaScript-Programmierdesign aller hilfreich sein wird.