I have asp.net application with JavaScript and I want to save in to ms sql DB additional information(TimeStamp) when a button is clicked.
onclick= "functionName();"
the function "functionName()" has another task and I want another function that store the timestamp as well
Write JS as below:
function functionName() {
var xmlhttp;
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
alert(xmlhttp.responseText);
}
}
var now = new Date(); // You can also any kind of data using query string
xmlhttp.open("GET", "saveTimespan.aspx?datetime=" + now, true);
xmlhttp.send();
}
Write below code to code behind of saveTimespan.aspx' page as below(remove all markup other thanPage` directory of this page):
protected void Page_Load(object sender, EventArgs e)
{
UpdateTimeStamp();
}
public void UpdateTimeStamp()
{
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "UPDATE TargetTable SET DateTimColumnName = #DateTimColumnName";
cmd.Parameters.AddWithValue("#DateTimColumnName", MyDateTime);
cmd.CommandType = CommandType.Text;
try
{
using (SqlConnection connection = new SqlConnection("YourConnectionString"))
{
cmd.Connection = connection;
connection.Open();
cmd.ExecuteNonQuery();
Response.Write("Data Updated Successfully!");
}
}
catch (Exception ex)
{
//Handle exception
}
}
Try using jQuery ajax, would be easier like
function functionName() {
$.ajax({
url: "test.html",
context: document.body,
success: function(){
$(this).addClass("done");
}
});
}
Ref: http://api.jquery.com/jQuery.ajax/
Related
I am trying to call open on xmlhttprequest in my javascript code but I am getting an exception "Access is Denied".
Here is my code:
<script type="text/javascript">
function doFunction() {
alert("hi");
xhr = new XMLHttpRequest();
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xhr = new XMLHttpRequest();
} else {
// code for IE6, IE5
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
var url = "https://localhost:1234/test/pi/testing/operation";
try{
xhr.open("POST", url, true);
} catch(err) {
alert(err.message);
}
xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
xhr.onreadystatechange = function () {
if (xhr.readyState == XMLHttpRequest.DONE) {
alert(xhr.responseText);
}
}
var testText = document.getElementById("test").value;
var jsonObject = { Status: "1", ErrorList: "", test: testText, Price: "" };
var data = JSON.stringify(jsonObject);
xhr.send(data);
}
</script>
The page itself is running on my IIS at localhost:8080 and I am trying to invoke my wcf service on localhost:1234.
I added https://localhost to my trusted sites but still not working why is that?
Thank you ;)
Added http://localhost to my trusted sites and started working.
The question and this answer applies for IE 10
I have data on a website which looks like this
[{"id":213877,"pic":"https://graph.facebook.com/ariel.barack/picture?type=square","url":"https://angel.co/ariel-barack","name":"Ariel Barack","type":"User"},{"id":109396,"pic":"https://d1qb2nb5cznatu.cloudfront.net/users/109396-medium_jpg?1405528556","url":"https://angel.co/mattbarackman","name":"Matt Barackman","type":"User"},{"id":881384,"pic":null,"url":"https://angel.co/austin-barack","name":"Austin Barack","type":"User"},{"id":245752,"pic":null,"url":"https://angel.co/drgoddess","name":"Dr. Goddess","type":"User"}]
I have a html file with javascript code as follows:
function httpGet(url) {
var xmlHttp = null;
xmlHttp = new XMLHttpRequest();
xmlHttp.open( "GET", url, false );
xmlHttp.send( null );
var data = xmlHttp.responseText;
data = (JSON.parse(data));
I need to access the "name" attribute from the URL database and form a string concat of all the name attributes. Could you please help me out what to be done next?
Below is my test data
var data = '{"name": "mkyong","age": 30,"address": {"streetAddress": "88 8nd Street","city": "New York"},"phoneNumber": [{"type": "home","number": "111 111-1111"},{"type": "fax","number": "222 222-2222"}]}';
var json = JSON.parse(data);
alert(json["name"]); //mkyong
alert(json.name);
For Example if you want to acces the name you can access as like above.
To concatenate the vales do like below
var Output = json.map(function(result) {
return result.name;
}).join('');
alert(Output);
Have a look on it https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse
var result = data.map(function(user) {
return user.name;
}).join('');
<html>
<head>
<script type="text/javascript">
function fun(){
var str='[{"id":213877,"pic":"https://graph.facebook.com/ariel.barack/picture?type=square","url":"https://angel.co/ariel-barack","name":"Ariel Barack","type":"User"},{"id":109396,"pic":"https://d1qb2nb5cznatu.cloudfront.net/users/109396-medium_jpg?1405528556","url":"https://angel.co/mattbarackman","name":"Matt Barackman","type":"User"},{"id":881384,"pic":null,"url":"https://angel.co/austin-barack","name":"Austin Barack","type":"User"},{"id":245752,"pic":null,"url":"https://angel.co/drgoddess","name":"Dr. Goddess","type":"User"}]';
var obj=eval(str);
var names='';
for(var item in obj){
names+=obj[item].name;
}
alert(names);
}
</script>
</head>
<body>
<input type="button" onclick="fun()" value="click me"/>
</body>
</html>
I got what you mean.It is the Ajax problem.If you really use the code that you provided,it should not work.Here is the Ajax code to get response from a certain url:
var ajaxRequest;
//create ajax object
function createAjaxRequest() {
var xmlhttp = null;
if (window.XMLHttpRequest) {// code for all new browsers
xmlhttp = new XMLHttpRequest();
}
else if (window.ActiveXObject) {// code for IE5 and IE6
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
return xmlhttp;
}
//send request and identify callbak handler
function send(url) {
ajaxRequest = createAjaxRequest();
ajaxRequest.onreadystatechange = callback;
ajaxRequest.open("POST", url, true);
ajaxRequest.send(null);
}
// the callback handler
function callback() {
if (ajaxRequest.readyState == 4) {// 4 = "loaded"
if (ajaxRequest.status == 200) {// 200 = OK
var data = ajaxRequest.responseText;
}
else {
alert("Problem retrieving data");
}
}
}
I have wriiten welcome screen which basically use below javascript to call creditCheck servlet. Within servlet, there is method which will check the username and password. Servlet returns value properly. alert is not getting generated after servlet excutation within javascript.
however if execute simple servlet ( not doing anything, just printing variables), it will generate alert.
below is my javascript within JSp file:
############################################
<script type="text/javascript">
function getXmlHttpRequestObject(){
var xmlHttp = false;
if (window.XMLHttpRequest){
return new XMLHttpRequest(); //To support the browsers IE7+, Firefox, Chrome, Opera, Safari
}
else if(window.ActiveXObject){
return new ActiveXObject("Microsoft.XMLHTTP"); // For the browsers IE6, IE5
}
else {
alert("Error due to old verion of browser upgrade your browser");
}
}
var xmlhttp = new getXmlHttpRequestObject(); //xmlhttp holds the ajax object
function servletPost() {
if(xmlhttp) {
var username = document.getElementById("uname");
var password = document.getElementById("pass");
xmlhttp.open("POST","CredCheck",true);
xmlhttp.onreadystatechange = handleServletPost;
req.onreadystatechange = callback;
xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xmlhttp.send("uname=" + username.value + "&pass=" + password.value );
}
}
function handleServletPost() {
if (xmlhttp.readyState == 4) {
if(xmlhttp.status == 200) {
alert(xmlhttp.responseText);
}
else {
alert("Ajax calling error");
}
}
}
</script>
#
I have changed xmlhttp.open("POST","CredCheck",true); to
xmlhttp.open("POST","CredCheck",false);
xmlhttp.onreadystatechange = handleServletPost;
Hi i have a requirement in which i have to check something from struts action class and then send the result back to the browser using ajax call called in a JS fx'.The issue is im not able to hit the action class and console is throwing the following error:
org.apache.struts.action.RequestProcessor processActionCreate No action instance for path /ChangePwdAjax could be created
java.lang.ClassNotFoundException:test.ChangePwdAjaxAction.java
The class is compiled and the package context is valid test.ChangePwdAjaxAction.java
Any ideas what and where im doing it wrong?
Here is what i have written so far.
JS code
function checkError()
{
var valuePassword="test";
var url = "/test/ChangePwdAjax.do?newPass="+valuePassword;
var xmlHTTP = getXMLHTTPRequest();
xmlHTTP.onreadystatechange = function() {
handleResponse(xmlHTTP); }
xmlHTTP.open("GET",url,true);
xmlHTTP.send();
}
function handleResponse(xmlHTTP){
alert("handleResponse");
if (xmlHTTP.readyState == 4 && xmlHTTP.status == 200) {
alert("handleResponse");
var xmlDoc = xmlHTTP.responseXML;
alert(xmlDoc.documentElement.getElementsByTagName("pwdFlag")[0].text);
}
}
function getXMLHTTPRequest(){
alert("getXMLHTTPRequest");
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
}
// IE
else if (window.ActiveXObject) {
return new ActiveXObject("Microsoft.XMLHTTP");
}
else{
alert("XMLHttpRequest is not supported!");
}
}
Action class code
public class ChangePwdAjaxAction extends Action {
public ActionForward execute(final ActionMapping mapping, final ActionForm form,
final HttpServletRequest request,final HttpServletResponse response)
{
System.out.println("----IN--AJAX ACTION----------");
final HttpSession session= request.getSession(false);
if(session==null || session.getAttribute("user_id")==null){
return mapping.findForward("sessionexpired");
}
final String user_id=(String)session.getAttribute("user_id");
try{
final BusinessDelegate busdel=new BusinessDelegate(user_id,session.getId());
String newpwd = (String)request.getParameter("newPass");
boolean b=busdel.checkOldPWd(user_id, newpwd);
//checking return values from bus delegate
response.setContentType("text/xml");
PrintWriter printwriter = response.getWriter();
printwriter.println("<?xml version=\"1.0\"?>");
printwriter.println("<Root>");
if(b)
{
System.err.println("----New password Failed--Y--------");
printwriter.println("<pwdFlag>"+"Y"+"</pwdFlag>");
}
else
{
System.out.println("----New password OK---N-------");
printwriter.println("<pwdFlag>"+"N"+"</pwdFlag>");
}
printwriter.println("</Root>");
}catch(Exception e){
logger.logCommon("Login Action : Login Process in Action : ", "EXCEPTION");
logger.logError(e);
}
return null;
}
}
Struts-config entry
<action path="/ChangePwdAjax" type="test.ChangePwdAjaxAction.java"/>
OOps this had to be
action path="/ChangePwdAjax" type="test.ChangePwdAjaxAction"/>
rather than
action path="/ChangePwdAjax" type="test.ChangePwdAjaxAction.java"/>
How can I rewrite this code without using jQuery? I need to do it in a mobile app where I can't use jQuery.
$.ajax({
type: "POST",
url:"../REST/session.aspx?_method=put",
data: JSON.stringify(dataObject, null,4),
cache: false,
dataType: "json",
success: onSuccessLogin,
error: function (xhr, ajaxOptions){
alert(xhr.status + " : " + xhr.statusText);
}
});
You can try this:
var xmlhttp;
if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
} else { // code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status != 200) {
// What you want to do on failure
alert(xmlhttp.status + " : " + xmlhttp.responseText);
}
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
// What you want to do on success
onSuccessLogin();
}
}
xmlhttp.open("POST", "../REST/session.aspx?_method=put", true);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.setRequestHeader("Cache-Control", "no-cache"); // For no cache
xmlhttp.send("data=" + JSON.stringify(dataObject, null,4));
As for how to do more stuff with only javascript without jQuery library take a look at W3Schools AJAX Tutorial or Mozilla - Using XMLHttpRequest
And as duri said, you will have to find a way to convert dataObject to string, as not all browsers support JSON object.
try this
var xmlHttp = createXmlHttpRequestObject();
//retrieves the xmlHttpRequest Object
function createXmlHttpRequestObject()
{
//will store the refrence to the xmlHttpRequest Object
var xmlHttp;
//if running in internet explorer version below 7
if(window.ActiveXObject)
{
try{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e){
xmlHttp = false;
}
}
else
{
try{
xmlHttp = new XMLHttpRequest();
}
catch(e){
xmlHttp = false;
}
}
if(!xmlHttp)
alert("Error Creating the xmlHttpObject");
else
return xmlHttp;
}
function callThisFunction()
{
if(xmlHttp.readyState == 4 || xmlHttp.readyState == 0)
{
var queryString = JSON.stringify(dataObject, null,4);
var url = "../REST/session.aspx?_method=put";
xmlHttp.open("POST", url, true);
//Send the proper header information along with the request
xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlHttp.setRequestHeader("Content-length", queryString.length);
xmlHttp.setRequestHeader("Connection", "close");
xmlHttp.onreadystatechange = checkHandleServerResponse;
xmlHttp.send(queryString);
}
}
function checkHandleServerResponse()
{
if(xmlHttp.readyState == 4)
{
if(xmlHttp.status == 200)
{
var JSONFile = 'jsonFormatData = '+xmlHttp.responseText;
eval(JSONFile);
if(jsonFormatData.description == 'Success')
{
//showDialog('Success','Login Successful','success',3);
location.href='default.aspx';
//setTimeout(function(){location.href='myGrupio.php';},3000);
}
else
showDialog('Error','You Need a Valid Login.','error',3);
}
else if(xmlHttp.status == 400)
{
setTimeout( function()
{
alert('you have error');
},3000);
}
else
alert("Error Code is "+xmlHttp.status)
}
}
For the Ajax request itself, have a look at the XMLHttpRequest object (special treatment for IE).
To parse the JSON response (dataType: 'json'), use JSON.parse (you might need the json2.js library).
jquery is already javascript. It's a library, entirely written in javascript. So you can use it within every javascript project. If you want to write a rest client yourself, you might look at this article
You may also consider using jQuery Mobile edition - very light - 17KB minified. 1.0 is alpha now, but I think it will be more stable and portable than self-baked code.