我的主页面有这段JS 希望无论是刷新还是 关闭页面 都会去调用另外一个页面,但是第一次刷新会执行另外页面的 代码 执行数据库操作,但是再次刷新却怎么也不执行不执行数据库操作了,却能返回OK1 并且弹出alert("a");
所有的麻烦帮帮忙看看什么问题主页面JS:
<script type="text/javascript" language="javascript"> function GetXmlHttpObject() {
var xmlHttp = null;
try {
// Firefox, Opera 8.0+, Safari
xmlHttp = new XMLHttpRequest();
}
catch (e) {
// Internet Explorer
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
window.onunload = function() {
xmlHttp = GetXmlHttpObject()
if (xmlHttp == null) {
alert("您的浏览器不支持AJAX!");
return;
} alert("刷新");
var url = "leave.aspx";
xmlHttp.onreadystatechange = stateChanged;
xmlHttp.open("GET", url, false);
xmlHttp.send(null);
}
function stateChanged() {
if (xmlHttp.readyState == 4) {
var str = xmlHttp.responseText;
if (str.indexOf("ok1") != -1) {
alert("a");
return;
}
}
}执行页面代码:protected void Page_Load(object sender, EventArgs e)
{ SqlConnection sc = DB.MsSQLCreate();
try
{
sc.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = sc; cmd.CommandText = "update dbo.Log set reTime = GETDATE() where [sID] = 65";
cmd.ExecuteNonQuery();
Response.Write("ok1");
}
catch
{ }
finally
{
sc.Close();
}
}
所有的麻烦帮帮忙看看什么问题主页面JS:
<script type="text/javascript" language="javascript"> function GetXmlHttpObject() {
var xmlHttp = null;
try {
// Firefox, Opera 8.0+, Safari
xmlHttp = new XMLHttpRequest();
}
catch (e) {
// Internet Explorer
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
window.onunload = function() {
xmlHttp = GetXmlHttpObject()
if (xmlHttp == null) {
alert("您的浏览器不支持AJAX!");
return;
} alert("刷新");
var url = "leave.aspx";
xmlHttp.onreadystatechange = stateChanged;
xmlHttp.open("GET", url, false);
xmlHttp.send(null);
}
function stateChanged() {
if (xmlHttp.readyState == 4) {
var str = xmlHttp.responseText;
if (str.indexOf("ok1") != -1) {
alert("a");
return;
}
}
}执行页面代码:protected void Page_Load(object sender, EventArgs e)
{ SqlConnection sc = DB.MsSQLCreate();
try
{
sc.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = sc; cmd.CommandText = "update dbo.Log set reTime = GETDATE() where [sID] = 65";
cmd.ExecuteNonQuery();
Response.Write("ok1");
}
catch
{ }
finally
{
sc.Close();
}
}
解决方案 »
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