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javaScript addition, deletion, modification and query

韦小宝

Release： 2017-11-27 10:31:57

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The addition, deletion, and modification code of

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<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<title>表格记录增删改查</title>
<style type="javaScript">
tr{
text-align:center;
}
</style>

<script type="text/javascript">
//通过新增按钮来控制表格的显示与隐藏
var optionFlag = "save";
var updateRowIndex = -1;
var checkFlag=false;//默认为不显示
function show() {
optionFlag = "save";
var f = document.getElementById("did");//获得id为did的 div
if(!checkFlag) {
f.style.visibility="visible";
}else{
f.style.visibility="hidden";
}
checkFlag=!checkFlag;
}

//通过保存按钮将数据添加到表格中
function insertRow_() {
switch(optionFlag) {
case "save" :
insertRow_$save();
break;
case "update" :
insertRow_$update();
break;
default :
alert("操作失败！！");
}

function insertRow_$save() {
//通过id获得要添加数据的表格
var table = document.getElementById("tableid");

//将所输入的内容赋给定义的变量
var titleName = document.getElementById("title").value;
var digestName = document.getElementById("digest").value;
var authorName = document.getElementById("author").value;
//获取下拉框内的内容
var selectIndex_ = document.getElementById("select");
var option = selectIndex_.options[selectIndex_.selectedIndex];
var selectName = option.text;

//获取编号的内容
var numberid = table.rows.length;

//在表尾添加一行数据
var row_ = table.insertRow(table.rows.length);

row_.insertCell(0).innerHTML = numberid;
row_.insertCell(1).innerHTML = titleName;
row_.insertCell(2).innerHTML = digestName;
row_.insertCell(3).innerHTML = authorName;
row_.insertCell(4).innerHTML = selectName;
row_.insertCell(5).innerHTML = &#39;<input type="button" value="修改" onclick="update_(this.parentNode.parentNode)"></input> <input type="button" value="删除" onclick="delete_(this.parentNode.parentNode)"></input>&#39;;

document.getElementById("title").value = "";
document.getElementById("digest").value = "";
document.getElementById("author").value = "";
document.getElementById("select").options[0].selected="true";

var f = document.getElementById("did");
f.style.visibility="hidden";

alert("insert数据成功！！");
}
//修改后的保存
var tr;
function insertRow_$update() {
var table = document.getElementById("tableid");
tr = table.rows[updateRowIndex];

var p = document.getElementById("title");
tr.cells[1].innerHTML = p.value;

p = document.getElementById("digest");
tr.cells[2].innerHTML = p.value;

p = document.getElementById("author");
tr.cells[3].innerHTML = p.value;

p = document.getElementById("select");
var Index_ = p.selectedIndex;
var option = p.options[Index_];
var selectName = option.text;
tr.cells[4].innerHTML = selectName;

document.getElementById("title").value = "";
document.getElementById("digest").value = "";
document.getElementById("author").value = "";
document.getElementById("select").options[0].selected="true";

var f = document.getElementById("did");
f.style.visibility="hidden";

alert("update数据成功！！");
}
}

//通过删除按钮 删除当前所在行
function delete_(row_) {
var table = document.getElementById("tableid");
table.deleteRow(row_.rowIndex);

refurbish_();
alert("delete数据成功！！");
}

//刷新
function refurbish_() {
var table = document.getElementById("tableid");
//获得table的行数
var rows = table.rows;
for(var i=1;i<rows.length;i++) {
rows[i].cells[0].innerHTML = i;
}
}

//通修改按钮对table里的数据进行修改
function update_(row) {
updateRowIndex = row.rowIndex;
optionFlag = "update";
//对table里的数据进行回显
document.getElementById("title").value = row.cells[1].innerHTML;
document.getElementById("digest").value = row.cells[2].innerHTML;
document.getElementById("author").value = row.cells[3].innerHTML;
var selectText = row.cells[4].innerHTML;
var sel = document.getElementById("select");
var ops = sel.options;
for(var i=0;i<ops.length;i++) {
if(selectText==ops[i].text) {
sel.options[i].selected = "true";
}
}
var f = document.getElementById("did");
f.style.visibility="visible";
}
</script>
</head>

<body>
<input type="button" value="新增" onclick="show()"></input>
<div>
<table border = "1" cellspacing = "0" id="tableid" width="90%">
<tr bgcolor="yellow">
<th>编号</th>
<th>名称</th>
<th>代码</th>
<th>机构</th>
<th>类别</th>
<th>操作</th>
</tr>
<tr>
<td>1</td>
<td>民生宝</td>
<td>100021</td>
<td>ms</td>
<td>基金</td>
<td>
<input type="button" value="修改" onclick="update_(this.parentNode.parentNode)"></input>
<input type="button" value="删除" onclick="delete_(this.parentNode.parentNode)"></input>
</td>
</tr>
</table>
</div>
<br>
<div align="center" id="did" style="visibility:hidden">
<form action="">
<table>
<tr>
<td>标题：</td>
<td><input type="text" id="title"></input></td>
<td>摘要：</td>
<td><input type="text" id="digest"></input></td>
</tr>

<tr>
<td>作者：</td>
<td><input type="text" id="author"></input></td>
<td>类别：</td>
<td align="left">
<select id="select">
<option>证劵</option>
<option>基金</option>
<option>股票</option>
</select>
</td>
</tr>
</table>
<br>
<center>
<input type="button" value="保存" onclick="insertRow_()"></input>
<input type="reset" value="重置"></input>
</center>
</form>
</div>
</body>
</html>

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