在應用程序的開發中，有些輸入信息是動態的，比如我們要註冊一個員工的工作經歷，比如下圖
如果做成死的，只能填寫三個，如果是四個呢？或者更多呢，那不是添加不上去了嗎，所以這樣固然不好，我們可以用動態添加表格行實現，如下圖，添加一行，輸入一行信息，這樣比較靈活
下面我們就來看看如何在asp和asp.net中結合javascript來實現這種效果：
首先，動態添加表格是要在前台實現的，當然後台也可以，不過可能要用到ajax，很麻煩，所以最好採用javascript來實現，下面來介紹動態添加表格行的兩種方式：
第一種：源碼
Javascript:
<script type="text/javascript"> /**//*This function is use to add one row dynamicly * tabObj : Target table * colNum: The number of columns that of a row in table * sorPos: The source of the new row. * targPos: The position where the new row will be added. * */ function addRow(tabObj,colNum,sorPos,targPos){ var nTR = tabObj.insertRow(tabObj.rows.length-targPos); // Insert a new row into appointed table on the //appointed position. var TRs = tabObj.getElementsByTagName('TR'); // Get TRs collection from the appointed table var sorTR = TRs[sorPos]; // Positioned the sorTR var TDs = sorTR.getElementsByTagName('TD'); // Get TDs collection from the appointed row if(colNum==0 || colNum==undefined || colNum==isNaN){ colNum=tabObj.rows[0].cells.length; } var ntd = new Array(); // Create a new TDs array for(var i=0; i< colNum; i++){ // Traverl the TDs in row ntd[i] = nTR.insertCell(); // Create new cell ntd[i].id = TDs[0].id; // copy the TD's id to new cell. | Attention! The TDs's //suffix must be appointed ntd[i].innerHTML = TDs[i].innerHTML; // copy the value in ntd[i]'s innerHTML from corresponding TDs } } /**//* This function is use to remove appointed row in appointed table * tabObj: the appointed table * targPos: target row position * btnObj: currently clicked delete image button * */ function deleteRow(tabObj,targPos,btnObj){ //Remove table row for(var i =0; i<tabObj.rows.length;i++){ if(tabObj.getElementsByTagName('img')[i]==btnObj){ tabObj.deleteRow(i+targPos); } } } </script>Html
<table id=tabUserInfo border=1> <tr> <td>姓名</td> <td>性別</td> <td>年齡</td> <td>愛好</td><td>Delete</td> </tr> <tr style="display:none" id=trUserInfo> <td id=tdUserInfo><input id=username name=username ></td> <td id=tdUserInfo><input id=usersex name=usersex></td> <td id=tdUserInfo><input id=userage name=userage></td> <td id=tdUserInfo><input id=userlove name=userlove></td> <td id=tdUserInfo><img onClick="deleteRow(document.all.tabUserInfo,1,this)"></td> </tr> <tr> <td><input type=button value="Add" onClick="addRow(document.all.tabUserInfo,null,1,1)"></td> </tr> </table>