无刷新获取字符串:
Html网页中:
<script>
//定义异步对象
var xmlHttp;
//封装方法
function CreateXMLHTTP() {
try {
xmlHttp = new XMLHttpRequest();
} catch (e) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
window.onload = function () {
document.getElementById("name").onclick = function ()
//创建异步对象
CreateXMLHTTP();
//通过事件来接受服务器返回
xmlHttp.onreadystatechange = function () { //判断状态
if (xmlHttp.readyState==&& xmlHttp.status==) {
//获取你要的数据
var data = xmlHttp.responseText;
document.getElementById("d1").innerText = data;
}
}
//设置将要访问的服务器地址和方式
xmlHttp.open("get", "Data.ashx"); //发送异步请求
xmlHttp.send();
}
}
</script>
</head>
<body>
<div id="d1"></div>
<input type="button" id="name" value="获取数据" />
</body>
提供数据页:Data.ashx中:
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
//线程 过两秒在获取数据
System.Threading.Thread.Sleep();
//你提供的数据--》字符串
context.Response.Write("这你要的数据");
}
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无刷新获取一张表,然会在静态网页中无刷新删除数据
Html网页中:
<body>
<input type="button" id="name" value="获取表" />
<div id="d1"></div>
</body>
</html>
<script>
var xmlHttp;
function CreateHTTP() {
try {
xmlHttp = new XMLHttpRequest();
} catch (e) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
//把相同的代码封装下
function Common() {
CreateHTTP();
xmlHttp.onreadystatechange = function () {
if (xmlHttp.readyState == && xmlHttp.status == ) { //接受数据--》一张表的字符串
var table = xmlHttp.responseText;
//显示在网页中
document.getElementById("d1").innerHTML = table;
}
}
}
document.getElementById("name").onclick = function () {
Common();
xmlHttp.open("get", "Table.ashx");
xmlHttp.send();
}
//删除链接的脚本
function dd(id) { //id传过来的删除的ID
Common();
xmlHttp.open("get", "Table.ashx?id=" + id);
xmlHttp.send()
}
</script>
提供数据页:Table.ashx中
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
//如果没有传值代表获取一张表
if (context.Request.QueryString["id"]!=null)
{
//得到需要删除的ID
int id = int.Parse(context.Request.QueryString["id"].ToString());
int r = SQLHelper.ExecuteNonQuery("delete Users where ID=@0", CommandType.Text, id);
if (r>)
{
Common(context);
}
}
else
{
Common(context);
}
}
//获取一张表的字符串 public void Common(HttpContext context)
{
SqlDataReader dr = SQLHelper.ExecuteReader("select * from Users", CommandType.Text);
string newTable = "<table cellspacing='0' rules='all' border='1' id='GridView1' style='border-collapse:collapse;'><tr><th scope='col'>ID</th>”+ “<th scope='col'>UserName</th><th scope='col'>Password</th><th scope='col'>Sex</th><th scope='col'>AdminID</th><th scope='col'>删除“+”</th></tr>";
//通过读取行的数据来补全一张表
while (dr.Read())
{
string sex = "checked='checke'";
if (dr[].ToString().ToLower() == "false")
{
sex = "";
}
newTable += "<tr><td>" + dr[] + "</td><td>" + dr[] + "</td><td>" + dr[] + "</td><td><span class='aspNetDisabled'><input type='checkbox'"
+ sex + " disabled='disabled' /></span></td><td>" + dr[] + "</td><td>"+
//javascript:dd("+dr[0]+") 这是个脚本在静态网页中实现
"<a href='javascript:dd(" + dr[] + ")'>删除</a></td></tr>";
}
dr.Close();
newTable += "</table>";
context.Response.Write(newTable);
}